lcd_i2c.c File Reference

#include "lcd_i2c.h"

Go to the source code of this file.

Functions
uint8_t	i2c_open (i2c_master_bus_handle_t *bus_handle, i2c_master_dev_handle_t *dev_handle, const uint8_t address)
	initializes the i2c communications and points the handles to correctly initialized variables on the heap.

Function Documentation

i2c_open()

uint8_t i2c_open	(	i2c_master_bus_handle_t *	bus_handle,
		i2c_master_dev_handle_t *	dev_handle,
		const uint8_t	address )

initializes the i2c communications and points the handles to correctly initialized variables on the heap.

Parameters

[out]	bus_handle	handle for initializing the bus
[out]	dev_handle	handle for initializing the device on bus
[in]	address	device address on bus to communicate with

Definition at line 3 of file lcd_i2c.c.

                                                                                                                  {
    i2c_master_bus_config_t bus_config = {
        .i2c_port = I2C_MASTER_NUM,
        .sda_io_num = I2C_MASTER_SDA_IO,
        .scl_io_num = I2C_MASTER_SCL_IO,
        .clk_source = I2C_CLK_SRC_DEFAULT,
        .glitch_ignore_cnt = 7,
        .flags.enable_internal_pullup = true,
    };
    ESP_ERROR_CHECK(i2c_new_master_bus(&bus_config, bus_handle));
 
    i2c_device_config_t dev_config = {
        .dev_addr_length = I2C_DEVICE_ADDRESS_LEN,
        .device_address = address,
        .scl_speed_hz = I2C_MASTER_FREQ_HZ,
    };
    ESP_ERROR_CHECK(i2c_master_bus_add_device(*bus_handle, &dev_config, dev_handle));
 
    return 0;
}