About twi_init function

[Vijayneerukanti]

I have to initialize a i2c multiplexer, for that I am sending the device address and register address to be written using the function: 

nrf_drv_twi_tx(&m_twi, (0x70), tx_buf, sizeof(tx_buf), false);

Whenever I call this function, the flow is stuck inside a while block which checks m_xfer_done: 

while (m_xfer_done == false) {}

Why the flow is stuck inside this loop?

I have initialized the twi master initialization as follows:

void twi_master_init(void)
{
    ret_code_t err_code;

    // Configure the settings for twi communication
    const nrf_drv_twi_config_t twi_config = {
       .scl                = TWI_SCL_M,  //SCL Pin
       .sda                = TWI_SDA_M,  //SDA Pin
       .frequency          = NRF_DRV_TWI_FREQ_400K, //Communication Speed
       .interrupt_priority = APP_IRQ_PRIORITY_HIGH, //Interrupt Priority(Note: if using Bluetooth then select priority carefully)
       .clear_bus_init     = false //automatically clear bus
    };

    //A function to initialize the twi communication
    err_code = nrf_drv_twi_init(&m_twi, &twi_config, twi_handler, NULL);
    APP_ERROR_CHECK(err_code);
    //NRF_LOG_INFO("error code in twi init= %d", err_code);
    //Enable the TWI Communication
    nrf_drv_twi_enable(&m_twi);
    //NRF_LOG_INFO("twi is initialized");
}

Thanks

[Edvin]

Hello,

Your snipped doesn't seem to include nrf_drv_twi_tx(); From where do you call it? Is it from your main() function, or from an interrupt? And where do you set m_xfer_done = true?

Best regards,

Edvin