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Byte Operations

Single and multi-byte read/write operations.

Functions​

wb_i2c_master_bus_read_byte​

Reads a byte from the I2C device.

esp_err_t wb_i2c_master_bus_read_byte(i2c_master_dev_handle_t dev_handle, uint8_t mem_address, uint8_t *data)

Parameters:

  • dev_handle (i2c_master_dev_handle_t): Handle to the I2C master device
  • mem_address (uint8_t): Memory address to read from
  • data (uint8_t *): Pointer to store the read byte

Returns:

ESP_OK if successful, error code otherwise

This function reads a single byte from the I2C device at the specified memory address.

wb_i2c_master_bus_read_multiple_bytes​

Read multiple bytes from an I2C device.

esp_err_t wb_i2c_master_bus_read_multiple_bytes(i2c_master_dev_handle_t dev_handle, uint8_t mem_address, uint8_t data[], uint8_t length)

Parameters:

  • dev_handle (i2c_master_dev_handle_t): Handle to the I2C device
  • mem_address (uint8_t): Starting memory address
  • data (uint8_t): Buffer to store read data
  • length (uint8_t): Number of bytes to read

Returns:

ESP_OK if successful, error code otherwise

This function reads multiple consecutive bytes starting from the specified memory address.

wb_i2c_master_bus_write_byte​

Write a byte to the I2C device.

esp_err_t wb_i2c_master_bus_write_byte(i2c_master_dev_handle_t dev_handle, uint8_t mem_address, uint8_t data)

Parameters:

  • dev_handle (i2c_master_dev_handle_t): Handle to the I2C master device
  • mem_address (uint8_t): Memory address to write to
  • data (uint8_t): Byte to write

Returns:

ESP_OK if successful, error code otherwise

This function writes a single byte to the specified memory address on the I2C device.

wb_i2c_master_bus_write_multiple_bytes​

Write multiple bytes to an I2C device.

esp_err_t wb_i2c_master_bus_write_multiple_bytes(i2c_master_dev_handle_t dev_handle, uint8_t mem_address, uint8_t *data, uint8_t length)

Parameters:

  • dev_handle (i2c_master_dev_handle_t): Handle of the I2C device
  • mem_address (uint8_t): Starting memory address
  • data (uint8_t *): Pointer to the data buffer to write
  • length (uint8_t): Number of bytes to write

Returns:

ESP_OK if successful, error code otherwise

This function writes multiple consecutive bytes starting from the specified memory address.