Chapter 2. API Reference
esp_err_t i2c_get_data_timing(i2c_port_t i2c_num, int *sample_time, int *hold_time)
get I2C data signal timing
Return
• ESP_OK Success
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• i2c_num: I2C port number
• sample_time: pointer to get sample time
• hold_time: pointer to get hold time
esp_err_t i2c_set_timeout(i2c_port_t i2c_num, int timeout)
set I2C timeout value
Return
• ESP_OK Success
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• i2c_num: I2C port number
• timeout: timeout value for I2C bus (unit: APB 80Mhz clock cycle)
esp_err_t i2c_get_timeout(i2c_port_t i2c_num, int *timeout)
get I2C timeout value
Return
• ESP_OK Success
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• i2c_num: I2C port number
• timeout: pointer to get timeout value
esp_err_t i2c_set_data_mode(i2c_port_t i2c_num, i2c_trans_mode_t tx_trans_mode,
i2c_trans_mode_t rx_trans_mode)
set I2C data transfer mode
Return
• ESP_OK Success
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• i2c_num: I2C port number
• tx_trans_mode: I2C sending data mode
• rx_trans_mode: I2C receving data mode
esp_err_t i2c_get_data_mode(i2c_port_t i2c_num, i2c_trans_mode_t *tx_trans_mode,
i2c_trans_mode_t *rx_trans_mode)
get I2C data transfer mode
Return
• ESP_OK Success
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• i2c_num: I2C port number
• tx_trans_mode: pointer to get I2C sending data mode
• rx_trans_mode: pointer to get I2C receiving data mode
Structures
struct i2c_config_t
I2C initialization parameters.
Espressif Systems 293
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