mirror of
https://github.com/espressif/esp-protocols.git
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68 lines
2.6 KiB
C++
68 lines
2.6 KiB
C++
/*
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* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "cxx_include/esp_modem_dte.hpp"
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#include "driver/uart.h"
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#include "esp_modem_config.h"
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#include "uart_resource.hpp"
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namespace esp_modem {
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uart_resource::~uart_resource()
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{
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if (port >= UART_NUM_0 && port < UART_NUM_MAX) {
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uart_driver_delete(port);
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}
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}
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uart_resource::uart_resource(const esp_modem_uart_term_config *config, QueueHandle_t *event_queue, int fd)
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: port(-1)
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{
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esp_err_t res;
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/* Config UART */
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uart_config_t uart_config = {};
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uart_config.baud_rate = config->baud_rate;
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uart_config.data_bits = config->data_bits;
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uart_config.parity = config->parity;
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uart_config.stop_bits = config->stop_bits;
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uart_config.flow_ctrl = (config->flow_control == ESP_MODEM_FLOW_CONTROL_HW) ? UART_HW_FLOWCTRL_CTS_RTS
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: UART_HW_FLOWCTRL_DISABLE;
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uart_config.source_clk = config->source_clk;
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ESP_MODEM_THROW_IF_ERROR(uart_param_config(config->port_num, &uart_config), "config uart parameter failed");
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if (config->flow_control == ESP_MODEM_FLOW_CONTROL_HW) {
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res = uart_set_pin(config->port_num, config->tx_io_num, config->rx_io_num,
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config->rts_io_num, config->cts_io_num);
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} else {
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res = uart_set_pin(config->port_num, config->tx_io_num, config->rx_io_num,
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UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
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}
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ESP_MODEM_THROW_IF_ERROR(res, "config uart gpio failed");
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/* Set flow control threshold */
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if (config->flow_control == ESP_MODEM_FLOW_CONTROL_HW) {
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res = uart_set_hw_flow_ctrl(config->port_num, UART_HW_FLOWCTRL_CTS_RTS, UART_FIFO_LEN - 8);
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} else if (config->flow_control == ESP_MODEM_FLOW_CONTROL_SW) {
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res = uart_set_sw_flow_ctrl(config->port_num, true, 8, UART_FIFO_LEN - 8);
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}
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ESP_MODEM_THROW_IF_ERROR(res, "config uart flow control failed");
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/* Install UART driver and get event queue used inside driver */
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res = uart_driver_install(config->port_num,
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config->rx_buffer_size, config->tx_buffer_size,
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config->event_queue_size, config->event_queue_size ? event_queue : nullptr,
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0);
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ESP_MODEM_THROW_IF_ERROR(res, "install uart driver failed");
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ESP_MODEM_THROW_IF_ERROR(uart_set_rx_timeout(config->port_num, 1), "set rx timeout failed");
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ESP_MODEM_THROW_IF_ERROR(uart_set_rx_full_threshold(config->port_num, 64), "config rx full threshold failed");
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/* mark UART as initialized */
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port = config->port_num;
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}
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} // namespace esp_modem
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