i2c_scan.cpp File Reference

Simple I2C bus scanner for the OLED UI board wiring. More...

#include <cinttypes>
#include <cstdio>
#include "driver/i2c_master.h"
#include "esp_err.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "tmc51x0.hpp"

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Functions
static esp_err_t	scan_address (i2c_master_bus_handle_t bus, uint8_t addr, TickType_t timeout_ticks, uint32_t freq_hz)
static void	scan_at_frequency (i2c_master_bus_handle_t bus_handle, uint32_t freq_hz)
void	app_main (void)

Variables
static const char *	TAG = "I2C_SCAN"
static constexpr i2c_port_t	I2C_PORT = I2C_NUM_0
static constexpr gpio_num_t	I2C_SDA_PIN = GPIO_NUM_5
static constexpr gpio_num_t	I2C_SCL_PIN = GPIO_NUM_23
static constexpr uint32_t	I2C_FREQ_FAST = 400000
static constexpr uint32_t	I2C_FREQ_STD = 100000

Detailed Description

Simple I2C bus scanner for the OLED UI board wiring.

Uses the same pins as the fatigue_test_espnow_ui app to probe all 7-bit addresses (0x03-0x77) and logs any devices that acknowledge.

Function Documentation

app_main()

void app_main

(

void

)

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scan_address()

static esp_err_t scan_address ( i2c_master_bus_handle_t bus, uint8_t addr, TickType_t timeout_ticks, uint32_t freq_hz )

static

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scan_at_frequency()

static void scan_at_frequency ( i2c_master_bus_handle_t bus_handle, uint32_t freq_hz )

static

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Variable Documentation

I2C_FREQ_FAST

constexpr uint32_t I2C_FREQ_FAST = 400000

staticconstexpr

I2C_FREQ_STD

constexpr uint32_t I2C_FREQ_STD = 100000

staticconstexpr

I2C_PORT

constexpr i2c_port_t I2C_PORT = I2C_NUM_0

staticconstexpr

I2C_SCL_PIN

constexpr gpio_num_t I2C_SCL_PIN = GPIO_NUM_23

staticconstexpr

I2C_SDA_PIN

constexpr gpio_num_t I2C_SDA_PIN = GPIO_NUM_5

staticconstexpr

TAG

const char* TAG = "I2C_SCAN"

static