Shared I2C master bus (expander, DAC control, fuel gauge). More...

Collaboration diagram for I2C bus:

Macros
#define	I2C_BUS_FREQ_HZ (400 * 1000)

Functions
esp_err_t	i2c_bus_init (i2c_master_bus_handle_t *out_handle)
	Initialize the shared I2C master bus on the board's SDA/SCL pins.
i2c_master_bus_handle_t	i2c_bus_handle (void)
	The shared bus handle cached by i2c_bus_init().
void	i2c_bus_scan (i2c_master_bus_handle_t bus)
	Probe 0x08..0x77 and log every ACKing address. Bring-up helper.

Detailed Description

Shared I2C master bus (expander, DAC control, fuel gauge).

Macro Definition Documentation

◆ I2C_BUS_FREQ_HZ

#define I2C_BUS_FREQ_HZ (400 * 1000)

Per-device SCL speed, set when drivers add themselves to the bus.

Function Documentation

◆ i2c_bus_handle()

i2c_master_bus_handle_t i2c_bus_handle ( void )

The shared bus handle cached by i2c_bus_init().

Lets a consumer that didn't run init (e.g. the stats diagnostics page probing device presence) reach the bus without threading the handle through every layer.

Returns: The master bus handle, or NULL if i2c_bus_init() has not succeeded yet.

◆ i2c_bus_init()

esp_err_t i2c_bus_init ( i2c_master_bus_handle_t * out_handle )

Initialize the shared I2C master bus on the board's SDA/SCL pins.

Parameters

[out] out_handle Receives the master bus handle.

Returns: ESP_OK on success, or the underlying driver error.

◆ i2c_bus_scan()

void i2c_bus_scan ( i2c_master_bus_handle_t bus )

Probe 0x08..0x77 and log every ACKing address. Bring-up helper.