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@ -35,7 +35,7 @@ extern "C" {
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#include "soc/uart_channel.h"
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#define UART_FIFO_LEN (128) /*!< Length of the hardware FIFO buffers */
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#define UART_INTR_MASK 0x1ff /*!< mask of all UART interrupts */
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#define UART_INTR_MASK 0x1ff /*!< Mask of all UART interrupts */
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#define UART_LINE_INV_MASK (0x3f << 19) /*!< TBD */
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#define UART_BITRATE_MAX 5000000 /*!< Max bit rate supported by UART */
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#define UART_PIN_NO_CHANGE (-1) /*!< Constant for uart_set_pin function which indicates that UART pin should not be changed */
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@ -73,7 +73,7 @@ typedef enum {
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typedef enum {
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UART_NUM_0 = 0x0, /*!< UART base address 0x3ff40000*/
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UART_NUM_1 = 0x1, /*!< UART base address 0x3ff50000*/
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UART_NUM_2 = 0x2, /*!< UART base address 0x3ff6E000*/
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UART_NUM_2 = 0x2, /*!< UART base address 0x3ff6e000*/
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UART_NUM_MAX,
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} uart_port_t;
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@ -81,7 +81,7 @@ typedef enum {
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* @brief UART parity constants
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*/
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typedef enum {
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UART_PARITY_DISABLE = 0x0, /*!< Disable UART parity*/
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UART_PARITY_DISABLE = 0x0, /*!< Disable UART parity*/
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UART_PARITY_EVEN = 0x2, /*!< Enable UART even parity*/
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UART_PARITY_ODD = 0x3 /*!< Enable UART odd parity*/
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} uart_parity_t;
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@ -101,11 +101,11 @@ typedef enum {
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* @brief UART configuration parameters for uart_param_config function
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*/
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typedef struct {
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int baud_rate; /*!< UART baudrate*/
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int baud_rate; /*!< UART baud rate*/
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uart_word_length_t data_bits; /*!< UART byte size*/
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uart_parity_t parity; /*!< UART parity mode*/
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uart_stop_bits_t stop_bits; /*!< UART stop bits*/
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uart_hw_flowcontrol_t flow_ctrl; /*!< UART HW flow control mode(cts/rts)*/
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uart_hw_flowcontrol_t flow_ctrl; /*!< UART HW flow control mode (cts/rts)*/
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uint8_t rx_flow_ctrl_thresh ; /*!< UART HW RTS threshold*/
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} uart_config_t;
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@ -114,13 +114,13 @@ typedef struct {
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*/
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typedef struct {
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uint32_t intr_enable_mask; /*!< UART interrupt enable mask, choose from UART_XXXX_INT_ENA_M under UART_INT_ENA_REG(i), connect with bit-or operator*/
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uint8_t rx_timeout_thresh; /*!< UART timeout interrupt threshold(unit: time of sending one byte)*/
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uint8_t rx_timeout_thresh; /*!< UART timeout interrupt threshold (unit: time of sending one byte)*/
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uint8_t txfifo_empty_intr_thresh; /*!< UART TX empty interrupt threshold.*/
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uint8_t rxfifo_full_thresh; /*!< UART RX full interrupt threshold.*/
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} uart_intr_config_t;
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/**
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* @brief UART event types used in the ringbuffer
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* @brief UART event types used in the ring buffer
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*/
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typedef enum {
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UART_DATA, /*!< UART data event*/
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@ -181,7 +181,7 @@ esp_err_t uart_get_word_length(uart_port_t uart_num, uart_word_length_t* data_bi
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esp_err_t uart_set_stop_bits(uart_port_t uart_num, uart_stop_bits_t stop_bits);
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/**
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* @brief Set UART stop bits.
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* @brief Get UART stop bits.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param stop_bits Pointer to accept value of UART stop bits.
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@ -193,7 +193,7 @@ esp_err_t uart_set_stop_bits(uart_port_t uart_num, uart_stop_bits_t stop_bits);
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esp_err_t uart_get_stop_bits(uart_port_t uart_num, uart_stop_bits_t* stop_bits);
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/**
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* @brief Set UART parity.
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* @brief Set UART parity mode.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param parity_mode the enum of uart parity configuration
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@ -230,7 +230,7 @@ esp_err_t uart_get_parity(uart_port_t uart_num, uart_parity_t* parity_mode);
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esp_err_t uart_set_baudrate(uart_port_t uart_num, uint32_t baudrate);
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/**
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* @brief Get UART bit-rate.
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* @brief Get UART baud rate.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param baudrate Pointer to accept value of UART baud rate
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@ -247,7 +247,9 @@ esp_err_t uart_get_baudrate(uart_port_t uart_num, uint32_t* baudrate);
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param inverse_mask Choose the wires that need to be inverted.
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* Inverse_mask should be chosen from UART_INVERSE_RXD/UART_INVERSE_TXD/UART_INVERSE_RTS/UART_INVERSE_CTS, combine with OR operation.
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* Inverse_mask should be chosen from
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UART_INVERSE_RXD / UART_INVERSE_TXD / UART_INVERSE_RTS / UART_INVERSE_CTS,
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combined with OR operation.
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*
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* @return
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* - ESP_OK Success
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@ -260,8 +262,8 @@ esp_err_t uart_set_line_inverse(uart_port_t uart_num, uint32_t inverse_mask);
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param flow_ctrl Hardware flow control mode
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* @param rx_thresh Threshold of Hardware RX flow control(0 ~ UART_FIFO_LEN).
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* Only when UART_HW_FLOWCTRL_RTS is set, will the rx_thresh value be set.
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* @param rx_thresh Threshold of Hardware RX flow control (0 ~ UART_FIFO_LEN).
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* Only when UART_HW_FLOWCTRL_RTS is set, will the rx_thresh value be set.
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*
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* @return
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* - ESP_OK Success
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@ -298,9 +300,9 @@ esp_err_t uart_get_hw_flow_ctrl(uart_port_t uart_num, uart_hw_flowcontrol_t* flo
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/**
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* @brief Clear UART interrupt status
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param clr_mask Bit mask of the status that to be cleared.
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* enable_mask should be chosen from the fields of register UART_INT_CLR_REG.
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param clr_mask Bit mask of the interrupt status to be cleared.
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* The bit mask should be composed from the fields of register UART_INT_CLR_REG.
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*
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* @return
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* - ESP_OK Success
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@ -311,9 +313,9 @@ esp_err_t uart_clear_intr_status(uart_port_t uart_num, uint32_t clr_mask);
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/**
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* @brief Set UART interrupt enable
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param enable_mask Bit mask of the enable bits.
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* enable_mask should be chosen from the fields of register UART_INT_ENA_REG.
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* The bit mask should be composed from the fields of register UART_INT_ENA_REG.
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*
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* @return
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* - ESP_OK Success
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@ -324,9 +326,9 @@ esp_err_t uart_enable_intr_mask(uart_port_t uart_num, uint32_t enable_mask);
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/**
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* @brief Clear UART interrupt enable bits
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param disable_mask Bit mask of the disable bits.
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* disable_mask should be chosen from the fields of register UART_INT_ENA_REG.
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* The bit mask should be composed from the fields of register UART_INT_ENA_REG.
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*
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* @return
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* - ESP_OK Success
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@ -334,9 +336,8 @@ esp_err_t uart_enable_intr_mask(uart_port_t uart_num, uint32_t enable_mask);
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*/
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esp_err_t uart_disable_intr_mask(uart_port_t uart_num, uint32_t disable_mask);
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/**
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* @brief Enable UART RX interrupt(RX_FULL & RX_TIMEOUT INTERRUPT)
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* @brief Enable UART RX interrupt (RX_FULL & RX_TIMEOUT INTERRUPT)
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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*
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@ -347,7 +348,7 @@ esp_err_t uart_disable_intr_mask(uart_port_t uart_num, uint32_t disable_mask);
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esp_err_t uart_enable_rx_intr(uart_port_t uart_num);
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/**
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* @brief Disable UART RX interrupt(RX_FULL & RX_TIMEOUT INTERRUPT)
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* @brief Disable UART RX interrupt (RX_FULL & RX_TIMEOUT INTERRUPT)
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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*
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@ -358,7 +359,7 @@ esp_err_t uart_enable_rx_intr(uart_port_t uart_num);
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esp_err_t uart_disable_rx_intr(uart_port_t uart_num);
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/**
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* @brief Disable UART TX interrupt(RX_FULL & RX_TIMEOUT INTERRUPT)
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* @brief Disable UART TX interrupt (TX_FULL & TX_TIMEOUT INTERRUPT)
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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*
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@ -369,7 +370,7 @@ esp_err_t uart_disable_rx_intr(uart_port_t uart_num);
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esp_err_t uart_disable_tx_intr(uart_port_t uart_num);
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/**
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* @brief Enable UART TX interrupt(RX_FULL & RX_TIMEOUT INTERRUPT)
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* @brief Enable UART TX interrupt (TX_FULL & TX_TIMEOUT INTERRUPT)
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param enable 1: enable; 0: disable
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@ -382,15 +383,15 @@ esp_err_t uart_disable_tx_intr(uart_port_t uart_num);
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esp_err_t uart_enable_tx_intr(uart_port_t uart_num, int enable, int thresh);
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/**
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* @brief register UART interrupt handler(ISR).
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* @brief Register UART interrupt handler (ISR).
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*
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* @note UART ISR handler will be attached to the same CPU core that this function is running on.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param fn Interrupt handler function.
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* @param arg parameter for handler function
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* @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
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* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
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* @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
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* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
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* @param handle Pointer to return handle. If non-NULL, a handle for the interrupt will
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* be returned here.
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*
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@ -400,7 +401,6 @@ esp_err_t uart_enable_tx_intr(uart_port_t uart_num, int enable, int thresh);
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*/
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esp_err_t uart_isr_register(uart_port_t uart_num, void (*fn)(void*), void * arg, int intr_alloc_flags, uart_isr_handle_t *handle);
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/**
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* @brief Free UART interrupt handler registered by uart_isr_register. Must be called on the same core as
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* uart_isr_register was called.
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@ -417,13 +417,16 @@ esp_err_t uart_isr_free(uart_port_t uart_num);
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* @brief Set UART pin number
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*
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* @note Internal signal can be output to multiple GPIO pads.
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* Only one GPIO pad can connect with input signal.
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* Only one GPIO pad can connect with input signal.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param tx_io_num UART TX pin GPIO number, if set to UART_PIN_NO_CHANGE, use the current pin.
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* @param rx_io_num UART RX pin GPIO number, if set to UART_PIN_NO_CHANGE, use the current pin.
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* @param rts_io_num UART RTS pin GPIO number, if set to UART_PIN_NO_CHANGE, use the current pin.
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* @param cts_io_num UART CTS pin GPIO number, if set to UART_PIN_NO_CHANGE, use the current pin.
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* @note Instead of GPIO number a macro 'UART_PIN_NO_CHANGE' may be provided
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to keep the currently allocated pin.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param tx_io_num UART TX pin GPIO number.
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* @param rx_io_num UART RX pin GPIO number.
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* @param rts_io_num UART RTS pin GPIO number.
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* @param cts_io_num UART CTS pin GPIO number.
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*
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* @return
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* - ESP_OK Success
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@ -432,11 +435,11 @@ esp_err_t uart_isr_free(uart_port_t uart_num);
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esp_err_t uart_set_pin(uart_port_t uart_num, int tx_io_num, int rx_io_num, int rts_io_num, int cts_io_num);
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/**
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* @brief UART set RTS level (before inverse)
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* UART rx hardware flow control should not be set.
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* @brief Manually set the UART RTS pin level.
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* @note UART must be configured with hardware flow control disabled.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param level 1: RTS output low(active); 0: RTS output high(block)
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* @param level 1: RTS output low (active); 0: RTS output high (block)
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*
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* @return
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* - ESP_OK Success
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@ -445,9 +448,9 @@ esp_err_t uart_set_pin(uart_port_t uart_num, int tx_io_num, int rx_io_num, int r
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esp_err_t uart_set_rts(uart_port_t uart_num, int level);
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/**
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* @brief UART set DTR level (before inverse)
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* @brief Manually set the UART DTR pin level.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param level 1: DTR output low; 0: DTR output high
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*
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* @return
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@ -457,9 +460,9 @@ esp_err_t uart_set_rts(uart_port_t uart_num, int level);
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esp_err_t uart_set_dtr(uart_port_t uart_num, int level);
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/**
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* @brief UART parameter configure
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* @brief Set UART configuration parameters.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_config UART parameter settings
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*
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* @return
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@ -469,9 +472,9 @@ esp_err_t uart_set_dtr(uart_port_t uart_num, int level);
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esp_err_t uart_param_config(uart_port_t uart_num, const uart_config_t *uart_config);
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/**
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* @brief UART interrupt configure
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* @brief Configure UART interrupts.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param intr_conf UART interrupt settings
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*
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* @return
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@ -485,18 +488,18 @@ esp_err_t uart_intr_config(uart_port_t uart_num, const uart_intr_config_t *intr_
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*
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* UART ISR handler will be attached to the same CPU core that this function is running on.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param rx_buffer_size UART RX ring buffer size, rx_buffer_size should be greater than UART_FIFO_LEN.
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* @param tx_buffer_size UART TX ring buffer size.
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* If set to zero, driver will not use TX buffer, TX function will block task until all data have been sent out..
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* @note tx_buffer_size should be greater than UART_FIFO_LEN.
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* @note Rx_buffer_size should be greater than UART_FIFO_LEN. Tx_buffer_size should be either zero or greater than UART_FIFO_LEN.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param rx_buffer_size UART RX ring buffer size.
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* @param tx_buffer_size UART TX ring buffer size.
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* If set to zero, driver will not use TX buffer, TX function will block task until all data have been sent out.
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* @param queue_size UART event queue size/depth.
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* @param uart_queue UART event queue handle (out param). On success, a new queue handle is written here to provide
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* access to UART events. If set to NULL, driver will not use an event queue.
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* @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
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* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info. Do not set ESP_INTR_FLAG_IRAM here
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* (the driver's ISR handler is not located in IRAM)
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* @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
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* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info. Do not set ESP_INTR_FLAG_IRAM here
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* (the driver's ISR handler is not located in IRAM)
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*
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* @return
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* - ESP_OK Success
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@ -507,7 +510,7 @@ esp_err_t uart_driver_install(uart_port_t uart_num, int rx_buffer_size, int tx_b
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/**
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* @brief Uninstall UART driver.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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*
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* @return
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* - ESP_OK Success
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@ -516,9 +519,9 @@ esp_err_t uart_driver_install(uart_port_t uart_num, int rx_buffer_size, int tx_b
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esp_err_t uart_driver_delete(uart_port_t uart_num);
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/**
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* @brief Wait UART TX FIFO empty
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* @brief Wait until UART TX FIFO is empty.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param ticks_to_wait Timeout, count in RTOS ticks
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*
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* @return
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@ -531,59 +534,59 @@ esp_err_t uart_wait_tx_done(uart_port_t uart_num, TickType_t ticks_to_wait);
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/**
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* @brief Send data to the UART port from a given buffer and length.
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*
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* This function will not wait for the space in TX FIFO, just fill the TX FIFO and return when the FIFO is full.
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* This function will not wait for enough space in TX FIFO. It will just fill the available TX FIFO and return when the FIFO is full.
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* @note This function should only be used when UART TX buffer is not enabled.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param buffer data buffer address
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* @param len data length to send
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* @param buffer data buffer address
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* @param len data length to send
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*
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* @return
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* - (-1) Parameter error
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* - OTHERS(>=0) The number of data that pushed to the TX FIFO
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* - OTHERS (>=0) The number of bytes pushed to the TX FIFO
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*/
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int uart_tx_chars(uart_port_t uart_num, const char* buffer, uint32_t len);
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/**
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* @brief Send data to the UART port from a given buffer and length,
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*
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* If parameter tx_buffer_size is set to zero:
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* If the UART driver's parameter 'tx_buffer_size' is set to zero:
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* This function will not return until all the data have been sent out, or at least pushed into TX FIFO.
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*
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* Otherwise, if tx_buffer_size > 0, this function will return after copying all the data to tx ringbuffer,
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* then, UART ISR will move data from ring buffer to TX FIFO gradually.
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* Otherwise, if the 'tx_buffer_size' > 0, this function will return after copying all the data to tx ring buffer,
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* UART ISR will then move data from the ring buffer to TX FIFO gradually.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param src data buffer address
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* @param size data length to send
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* @param src data buffer address
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* @param size data length to send
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*
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* @return
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* - (-1) Parameter error
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* - OTHERS(>=0) The number of data that pushed to the TX FIFO
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* - OTHERS (>=0) The number of bytes pushed to the TX FIFO
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*/
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int uart_write_bytes(uart_port_t uart_num, const char* src, size_t size);
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/**
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* @brief Send data to the UART port from a given buffer and length,
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* @brief Send data to the UART port from a given buffer and length.
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*
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* If parameter tx_buffer_size is set to zero:
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* If the UART driver's parameter 'tx_buffer_size' is set to zero:
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* This function will not return until all the data and the break signal have been sent out.
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* After all data send out, send a break signal.
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* After all data is sent out, send a break signal.
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*
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* Otherwise, if tx_buffer_size > 0, this function will return after copying all the data to tx ringbuffer,
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* then, UART ISR will move data from ring buffer to TX FIFO gradually.
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* After all data send out, send a break signal.
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* Otherwise, if the 'tx_buffer_size' > 0, this function will return after copying all the data to tx ring buffer,
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* UART ISR will then move data from the ring buffer to TX FIFO gradually.
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* After all data sent out, send a break signal.
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*
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* @param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2
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* @param src data buffer address
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* @param size data length to send
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* @param brk_len break signal length (unit: time of one data bit at current_baudrate)
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* @param brk_len break signal length (unit: the time it takes to send a complete byte
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including start, stop and parity bits at current_baudrate)
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*
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* @return
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* - (-1) Parameter error
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* - OTHERS(>=0) The number of data that pushed to the TX FIFO
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* - OTHERS (>=0) The number of bytes pushed to the TX FIFO
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*/
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int uart_write_bytes_with_break(uart_port_t uart_num, const char* src, size_t size, int brk_len);
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/**
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@ -596,7 +599,7 @@ int uart_write_bytes_with_break(uart_port_t uart_num, const char* src, size_t si
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*
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* @return
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* - (-1) Error
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* - Others return a char data from uart fifo.
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* - OTHERS (>=0) The number of bytes read from UART FIFO
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*/
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int uart_read_bytes(uart_port_t uart_num, uint8_t* buf, uint32_t length, TickType_t ticks_to_wait);
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@ -612,10 +615,10 @@ int uart_read_bytes(uart_port_t uart_num, uint8_t* buf, uint32_t length, TickTyp
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esp_err_t uart_flush(uart_port_t uart_num);
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/**
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* @brief UART get RX ring buffer cached data length
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* @brief UART get RX ring buffer cached data length
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*
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* @param uart_num UART port number.
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* @param size Pointer of size_t to accept cached data length
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* @param uart_num UART port number.
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* @param size Pointer of size_t to accept cached data length
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*
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* @return
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* - ESP_OK Success
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@ -624,11 +627,11 @@ esp_err_t uart_flush(uart_port_t uart_num);
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esp_err_t uart_get_buffered_data_len(uart_port_t uart_num, size_t* size);
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/**
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* @brief UART disable pattern detect function.
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* Designed for applications like 'AT commands'.
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* When the hardware detect a series of one same character, the interrupt will be triggered.
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* @brief UART disable pattern detect function.
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* Designed for applications like 'AT commands'.
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* When the hardware detects a series of one same character, the interrupt will be triggered.
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*
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* @param uart_num UART port number.
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* @param uart_num UART port number.
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*
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* @return
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* - ESP_OK Success
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@ -637,183 +640,22 @@ esp_err_t uart_get_buffered_data_len(uart_port_t uart_num, size_t* size);
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esp_err_t uart_disable_pattern_det_intr(uart_port_t uart_num);
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/**
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* @brief UART enable pattern detect function.
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* Designed for applications like 'AT commands'.
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* When the hardware detect a series of one same character, the interrupt will be triggered.
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* @brief UART enable pattern detect function.
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* Designed for applications like 'AT commands'.
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* When the hardware detect a series of one same character, the interrupt will be triggered.
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*
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* @param uart_num UART port number.
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* @param pattern_chr character of the pattern
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* @param chr_num number of the character, 8bit value.
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* @param chr_tout timeout of the interval between each pattern characters, 24bit value, unit is APB(80Mhz) clock cycle.
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* @param post_idle idle time after the last pattern character, 24bit value, unit is APB(80Mhz) clock cycle.
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* @param pre_idle idle time before the first pattern character, 24bit value, unit is APB(80Mhz) clock cycle.
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* @param chr_tout timeout of the interval between each pattern characters, 24bit value, unit is APB (80Mhz) clock cycle.
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* @param post_idle idle time after the last pattern character, 24bit value, unit is APB (80Mhz) clock cycle.
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* @param pre_idle idle time before the first pattern character, 24bit value, unit is APB (80Mhz) clock cycle.
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*
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* @return
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* - ESP_OK Success
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* - ESP_FAIL Parameter error
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*/
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esp_err_t uart_enable_pattern_det_intr(uart_port_t uart_num, char pattern_chr, uint8_t chr_num, int chr_tout, int post_idle, int pre_idle);
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/***************************EXAMPLE**********************************
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*
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*
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* ----------------EXAMPLE OF UART SETTING ---------------------
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* @code{c}
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* //1. Setup UART
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* #include "freertos/queue.h"
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* //a. Set UART parameter
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* int uart_num = 0; //uart port number
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* uart_config_t uart_config = {
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* .baud_rate = 115200, //baudrate
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* .data_bits = UART_DATA_8_BITS, //data bit mode
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* .parity = UART_PARITY_DISABLE, //parity mode
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* .stop_bits = UART_STOP_BITS_1, //stop bit mode
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* .flow_ctrl = UART_HW_FLOWCTRL_DISABLE, //hardware flow control(cts/rts)
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* .rx_flow_ctrl_thresh = 120, //flow control threshold
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* };
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* uart_param_config(uart_num, &uart_config);
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* //b1. Setup UART driver(with UART queue)
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* QueueHandle_t uart_queue;
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* //parameters here are just an example, tx buffer size is 2048
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* uart_driver_install(uart_num, 1024 * 2, 1024 * 2, 10, &uart_queue, 0);
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* //b2. Setup UART driver(without UART queue)
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* //parameters here are just an example, tx buffer size is 0
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* uart_driver_install(uart_num, 1024 * 2, 0, 10, NULL, 0);
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*@endcode
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*-----------------------------------------------------------------------------*
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* @code{c}
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* //2. Set UART pin
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* //set UART pin, not needed if use default pins.
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* uart_set_pin(uart_num, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, 15, 13);
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* @endcode
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*-----------------------------------------------------------------------------*
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* @code{c}
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* //3. Read data from UART.
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* uint8_t data[128];
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* int length = 0;
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* length = uart_read_bytes(uart_num, data, sizeof(data), 100);
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* @endcode
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*-----------------------------------------------------------------------------*
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* @code{c}
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* //4. Write data to UART.
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* char* test_str = "This is a test string.\n"
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* uart_write_bytes(uart_num, (const char*)test_str, strlen(test_str));
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* @endcode
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*-----------------------------------------------------------------------------*
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* @code{c}
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* //5. Write data to UART, end with a break signal.
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* uart_write_bytes_with_break(0, "test break\n",strlen("test break\n"), 100);
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* @endcode
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*-----------------------------------------------------------------------------*
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* @code{c}
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* //6. an example of echo test with hardware flow control on UART1
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* void uart_loop_back_test()
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* {
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* int uart_num = 1;
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* uart_config_t uart_config = {
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* .baud_rate = 115200,
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* .data_bits = UART_DATA_8_BITS,
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* .parity = UART_PARITY_DISABLE,
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* .stop_bits = UART_STOP_BITS_1,
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* .flow_ctrl = UART_HW_FLOWCTRL_CTS_RTS,
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* .rx_flow_ctrl_thresh = 122,
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* };
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* //Configure UART1 parameters
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* uart_param_config(uart_num, &uart_config);
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* //Set UART1 pins(TX: IO16, RX: IO17, RTS: IO18, CTS: IO19)
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* uart_set_pin(uart_num, 16, 17, 18, 19);
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* //Install UART driver( We don't need an event queue here)
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* uart_driver_install(uart_num, 1024 * 2, 1024*4, 0, NULL, 0);
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* uint8_t data[1000];
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* while(1) {
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* //Read data from UART
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* int len = uart_read_bytes(uart_num, data, sizeof(data), 10);
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* //Write data back to UART
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* uart_write_bytes(uart_num, (const char*)data, len);
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* }
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* }
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* @endcode
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*-----------------------------------------------------------------------------*
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* @code{c}
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* //7. An example of using UART event queue on UART0.
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* #include "freertos/queue.h"
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* //A queue to handle UART event.
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* QueueHandle_t uart0_queue;
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* static const char *TAG = "uart_example";
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* void uart_task(void *pvParameters)
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* {
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* int uart_num = (int)pvParameters;
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* uart_event_t event;
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* size_t size = 1024;
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* uint8_t* dtmp = (uint8_t*)malloc(size);
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* for(;;) {
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* //Waiting for UART event.
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* if(xQueueReceive(uart0_queue, (void * )&event, (portTickType)portMAX_DELAY)) {
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* ESP_LOGI(TAG, "uart[%d] event:", uart_num);
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* switch(event.type) {
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* memset(dtmp, 0, size);
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* //Event of UART receving data
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* case UART_DATA:
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* ESP_LOGI(TAG,"data, len: %d", event.size);
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* int len = uart_read_bytes(uart_num, dtmp, event.size, 10);
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* ESP_LOGI(TAG, "uart read: %d", len);
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* break;
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* //Event of HW FIFO overflow detected
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* case UART_FIFO_OVF:
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* ESP_LOGI(TAG, "hw fifo overflow\n");
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* break;
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* //Event of UART ring buffer full
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* case UART_BUFFER_FULL:
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* ESP_LOGI(TAG, "ring buffer full\n");
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* break;
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* //Event of UART RX break detected
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* case UART_BREAK:
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* ESP_LOGI(TAG, "uart rx break\n");
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* break;
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* //Event of UART parity check error
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* case UART_PARITY_ERR:
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* ESP_LOGI(TAG, "uart parity error\n");
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* break;
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* //Event of UART frame error
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* case UART_FRAME_ERR:
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* ESP_LOGI(TAG, "uart frame error\n");
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* break;
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* //Others
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* default:
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* ESP_LOGI(TAG, "uart event type: %d\n", event.type);
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* break;
|
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|
|
* }
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|
|
* }
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|
|
* }
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|
|
* free(dtmp);
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|
|
* dtmp = NULL;
|
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|
|
* vTaskDelete(NULL);
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|
|
* }
|
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|
|
*
|
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|
|
* void uart_queue_test()
|
|
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|
|
* {
|
|
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|
|
* int uart_num = 0;
|
|
|
|
|
* uart_config_t uart_config = {
|
|
|
|
|
* .baud_rate = 115200,
|
|
|
|
|
* .data_bits = UART_DATA_8_BITS,
|
|
|
|
|
* .parity = UART_PARITY_DISABLE,
|
|
|
|
|
* .stop_bits = UART_STOP_BITS_1,
|
|
|
|
|
* .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
|
|
|
|
|
* .rx_flow_ctrl_thresh = 122,
|
|
|
|
|
* };
|
|
|
|
|
* //Set UART parameters
|
|
|
|
|
* uart_param_config(uart_num, &uart_config);
|
|
|
|
|
* //Set UART pins,(-1: default pin, no change.)
|
|
|
|
|
* uart_set_pin(uart_num, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
|
|
|
|
|
* //Set UART log level
|
|
|
|
|
* esp_log_level_set(TAG, ESP_LOG_INFO);
|
|
|
|
|
* //Install UART driver, and get the queue.
|
|
|
|
|
* uart_driver_install(uart_num, 1024 * 2, 1024*4, 10, &uart0_queue, 0);
|
|
|
|
|
* //Create a task to handler UART event from ISR
|
|
|
|
|
* xTaskCreate(uart_task, "uTask", 1024, (void*)uart_num, 10, NULL);
|
|
|
|
|
* }
|
|
|
|
|
* @endcode
|
|
|
|
|
*
|
|
|
|
|
***************************END OF EXAMPLE**********************************/
|
|
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
|
|
|
}
|
|
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|