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Add I2C IDF Wrapper

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me-no-dev
2020-05-13 19:04:26 +03:00
parent 77015e05be
commit ce64a26ce3
1 changed files with 79 additions and 9 deletions
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88
cores/esp32/esp32-hal-i2c.c
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@ -1781,29 +1781,99 @@ uint32_t i2cGetStatus(i2c_t * i2c){
else return 0; else return 0;
} }
#else #else
#include "driver/i2c.h"
#define ACK_CHECK_EN 1 /*!< I2C master will check ack from slave*/
#define ACK_CHECK_DIS 0 /*!< I2C master will not check ack from slave */
#define ACK_VAL 0x0 /*!< I2C ack value */
#define NACK_VAL 0x1 /*!< I2C nack value */
struct i2c_struct_t {
i2c_port_t num;
};
i2c_t * i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t clk_speed){ i2c_t * i2cInit(uint8_t i2c_num, int8_t sda, int8_t scl, uint32_t clk_speed){
return NULL; i2c_t * out = (i2c_t*)malloc(sizeof(i2c_t));
if(out == NULL){
log_e("malloc failed");
return NULL;
}
out->num = (i2c_port_t)i2c_num;
i2c_config_t conf;
conf.mode = I2C_MODE_MASTER;
conf.scl_io_num = (gpio_num_t)scl;
conf.sda_io_num = (gpio_num_t)sda;
conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
conf.master.clk_speed = clk_speed;
esp_err_t ret = i2c_param_config(out->num, &conf);
if (ret != ESP_OK) {
log_e("i2c_param_config failed");
free(out);
return NULL;
}
ret = i2c_driver_install(out->num, conf.mode, 0, 0, 0);
if (ret != ESP_OK) {
log_e("i2c_driver_install failed");
free(out);
return NULL;
}
return out;
} }
i2c_err_t i2cWrite(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis){
esp_err_t ret = ESP_OK;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, ACK_CHECK_EN);
i2c_master_write(cmd, buff, size, ACK_CHECK_EN);
//if send stop?
i2c_master_stop(cmd);
ret = i2c_master_cmd_begin(i2c->num, cmd, timeOutMillis / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
return ret;
}
i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis, uint32_t *readCount){
esp_err_t ret = ESP_OK;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_READ, ACK_CHECK_EN);
if (size > 1) {
i2c_master_read(cmd, buff, size - 1, ACK_VAL);
}
i2c_master_read_byte(cmd, buff + size - 1, NACK_VAL);
i2c_master_stop(cmd);
ret = i2c_master_cmd_begin(i2c->num, cmd, timeOutMillis / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
if(ret == ESP_OK){
*readCount = size;
}
return ret;
}
void i2cRelease(i2c_t *i2c){ void i2cRelease(i2c_t *i2c){
log_w("");
return; return;
} }
i2c_err_t i2cWrite(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis){
return ESP_FAIL;
}
i2c_err_t i2cRead(i2c_t * i2c, uint16_t address, uint8_t* buff, uint16_t size, bool sendStop, uint16_t timeOutMillis, uint32_t *readCount){
return ESP_FAIL;
}
i2c_err_t i2cFlush(i2c_t *i2c){ i2c_err_t i2cFlush(i2c_t *i2c){
return ESP_FAIL; esp_err_t ret = i2c_reset_tx_fifo(i2c->num);
if(ret != ESP_OK){
return ret;
}
return i2c_reset_rx_fifo(i2c->num);
} }
i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed){ i2c_err_t i2cSetFrequency(i2c_t * i2c, uint32_t clk_speed){
return ESP_FAIL; log_w("");
return ESP_OK;
} }
uint32_t i2cGetFrequency(i2c_t * i2c){ uint32_t i2cGetFrequency(i2c_t * i2c){
log_w("");
return 0; return 0;
} }
uint32_t i2cGetStatus(i2c_t * i2c){ uint32_t i2cGetStatus(i2c_t * i2c){
log_w("");
return 0; return 0;
} }