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Code: Select all

static int do_i2cdetect_cmd(int argc, char **argv)
{
    i2c_driver_install(i2c_port, I2C_MODE_MASTER, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
    i2c_master_driver_initialize();
    uint8_t address;
    printf("     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f\r\n");
    for (int i = 0; i < 128; i += 16) {
        printf("%02x: ", i);
        for (int j = 0; j < 16; j++) {
            fflush(stdout);
            address = i + j;
            i2c_cmd_handle_t cmd = i2c_cmd_link_create();
            i2c_master_start(cmd);
            i2c_master_write_byte(cmd, (address << 1) | WRITE_BIT, ACK_CHECK_EN);
            i2c_master_stop(cmd);
            esp_err_t ret = i2c_master_cmd_begin(i2c_port, cmd, 50 / portTICK_PERIOD_MS);
            i2c_cmd_link_delete(cmd);
            if (ret == ESP_OK) {
                printf("%02x ", address);
            } else if (ret == ESP_ERR_TIMEOUT) {
                printf("UU ");
            } else {
                printf("-- ");
            }
        }
        printf("\r\n");
    }

    i2c_driver_delete(i2c_port);
    return 0;
}

Code: Select all

 
 |             Steps to Use i2c-tools                         |
 |                                                            |
 |  1. Try 'help', check all supported commands               |
 |  2. Try 'i2cconfig' to configure your I2C bus              |
 |  3. Try 'i2cdetect' to scan devices on the bus             |
 |  4. Try 'i2cget' to get the content of specific register   |
 |  5. Try 'i2cset' to set the value of specific register     |
 |  6. Try 'i2cdump' to dump all the register (Experiment)    |
 |                                                            |
 ==============================================================


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i2c-tools> i2cconfig --port=0 --freq=100000 --sda=3 --scl=4
W (32623) cmd_i2ctools: Bus is busy
i2c-tools> 

Code: Select all

static int do_i2cdetect_cmd(int argc, char **argv)
{
    i2c_driver_install(i2c_port, I2C_MODE_MASTER, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
    i2c_master_driver_initialize();
    uint8_t address;
    printf("     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f\r\n");
    for (int i = 0; i < 128; i += 16) {
        printf("%02x: ", i);
<snip>

Code: Select all

static esp_err_t i2c_master_driver_initialize(void)
{
    i2c_config_t conf = {
        .mode = I2C_MODE_MASTER,
        .sda_io_num = i2c_gpio_sda,
        .sda_pullup_en = GPIO_PULLUP_ENABLE,
        .scl_io_num = i2c_gpio_scl,
        .scl_pullup_en = GPIO_PULLUP_ENABLE,
        .master.clk_speed = i2c_frequency,
        // .clk_flags = 0,          /*!< Optional, you can use I2C_SCLK_SRC_FLAG_* flags to choose i2c source clock here. */
    };
    return i2c_param_config(i2c_port, &conf);
}