my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Tue, 30 Nov 2021 15:06:20 GMT

Then I would suggest you contact the chip vendor. They may know if this is expected behavior or not.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Tue, 30 Nov 2021 14:59:25 GMT

Yes, I'm using that as a temporary solution as after NRF_DRV_TWI_EVT_DATA_NACK it's error next time function is successful.

But out of 100, 3-4 times I'm keep getting this error.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Tue, 30 Nov 2021 14:47:11 GMT

I'm not sure what sure under what conditions this IC will NACK the command. Maybe there is a limitation on how frequent you can send it. I suggest you try to to set m_xfer_done=true on NRF_DRV_TWI_EVT_DATA_NACK to see if it keeps rejecting your command.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Mon, 29 Nov 2021 19:47:38 GMT

I placed breakpoints in both of these events and device is got stuck in

    NRF_LOG_INFO("TWI NRF_DRV_TWI_EVT_DATA_NACK\n");

After running for more than 25- 30 min.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Mon, 29 Nov 2021 11:19:19 GMT

[quote userid="4240" url="~/f/nordic-q-a/82011/my-program-is-getting-stuck-in-assert_nrf_callback-while-using-nrf_drv_twi_tx-function/341044#341044"]The priority must be higher than the the app timer interrupt you are calling it from. The TWI callback will become blocked otherwise. [/quote]

After setting priority to APP_IRQ_PRIORITY_LOW device is most of time device is working as expected .

[quote userid="4240" url="~/f/nordic-q-a/82011/my-program-is-getting-stuck-in-assert_nrf_callback-while-using-nrf_drv_twi_tx-function/341044#341044"] Can you place a breakpoint in both of these events to see if they occur?[/quote]

sure I'll check it.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Mon, 29 Nov 2021 10:54:52 GMT

So m_xfer_done will never be set if you get a NRF_DRV_TWI_EVT_ADDRESS_NACK or NRF_DRV_TWI_EVT_DATA_NACK event. Can you place a breakpoint in both of these events to see if they occur?

[quote userid="10479" url="~/f/nordic-q-a/82011/my-program-is-getting-stuck-in-assert_nrf_callback-while-using-nrf_drv_twi_tx-function/341042#341042"]I have set my TWI interrupt priority from APP_IRQ_PRIORITY_HIGH to APP_IRQ_PRIORITY_LOW[/quote]

The priority must be higher than the the app timer interrupt you are calling it from. The TWI callback will become blocked otherwise.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Mon, 29 Nov 2021 10:47:37 GMT

I have set my TWI interrupt priority from APP_IRQ_PRIORITY_HIGH to APP_IRQ_PRIORITY_LOW but now I'm getting same problem randomly sometime after 10 to 60 cycles.
please find twi_handler() callback function below:

static void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
    switch (p_event->type)
    {
        case NRF_DRV_TWI_EVT_DONE:
            if (p_event->xfer_desc.type == NRF_DRV_TWI_XFER_TX)
            {
                m_xfer_done = true;
            }
            if (p_event->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
            {
                m_read_done = true;
            }
           //NRF_LOG_INFO("TWI NRF_DRV_TWI_EVT_DONE\n");
           break;

        case NRF_DRV_TWI_EVT_ADDRESS_NACK:
            NRF_LOG_INFO("TWI NRF_DRV_TWI_EVT_ADDRESS_NACK\n");
            break;
        
        case NRF_DRV_TWI_EVT_DATA_NACK:
            NRF_LOG_INFO("TWI NRF_DRV_TWI_EVT_DATA_NACK\n");
            break;
        
        default:
            m_xfer_done = true;
            break;
    }
}

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Fri, 26 Nov 2021 08:55:11 GMT

OK, you are using the TWI driver in non-blocking mode. What is interrupt priority did you select for the TWI driver? Can you also show how you have implemented your twi_handler() callback?

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Thu, 25 Nov 2021 19:35:02 GMT

I'm sharing debug screenshot, program ends up here

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Thu, 25 Nov 2021 14:06:54 GMT

I understand, but I would like to know where in your code the program gets stuck. Are you familiar with debugging in SES? Can you pause the debugger to see where it ends up after the error occured?

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Thu, 25 Nov 2021 13:09:40 GMT

In my device there is one function which repeat itself for 40 times and each time it update it's parameter. For first 6 -10 time function working as expected but after that device not responding and required power off to reset.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Thu, 25 Nov 2021 12:28:31 GMT

Can you pause the debugger to see where it gets stuck?

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Thu, 25 Nov 2021 12:27:47 GMT

Yes I tried but not getting any error in debug mode. It's getting stuck somewhere else.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Wed, 24 Nov 2021 14:24:34 GMT

Hi,

Have you built the project with the "Debug" configuration?

This should make the app_error_fault_handler() in app_error_weak.c print out a crash log with information about the error code and where it was returned.

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Wed, 24 Nov 2021 10:07:33 GMT

I'm using LTC2631, 12 bit DAC IC for write operation using using below code:

#define LTC2631_BASE_ADDRESS    0x73      //!< LTC2631 base address //0010000

#define LTC2631_DAC_ADDRESS     0x30 //!< LTC2631 write-to-dac register
#define LTC2631_EEPROM_ADDRESS 0x60        //!< LTC2631 write-to-eeprom register

#define RDY_BIT_POS             0x07        //!< Position of RDY bit

  /* Shift parameter val to get 2 8-bits values. */
    uint8_t reg[3] = {LTC2631_DAC_ADDRESS,
                      (val>>4), (val<<4)};

    /*uint8_t reg[3] = {LTC2631_DAC_ADDRESS,
                      (0), (0)};*/
    m_xfer_done = false;
   
    ret_code_t err_code = nrf_drv_twi_tx(&m_twi, LTC2631_BASE_ADDRESS, reg, sizeof(reg), false);
    if (err_code != NRF_SUCCESS)
    {
      NRF_LOG_INFO("error Erase bonds!");
        return err_code;
    }
  
    //NRF_LOG_INFO("success Erase bonds!");
   
    while (m_xfer_done == false);

    return NRF_SUCCESS;

Could you please tell me if I'm missing something here

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Kapil Rawat — Tue, 23 Nov 2021 12:51:47 GMT

Hi Vidar,
I'm using blocking mode. I tried to check error code but my program is getting stuck and not showing anything after that (device reset required).

RE: my program is getting stuck in assert_nrf_callback while using nrf_drv_twi_tx function

Vidar Berg — Tue, 23 Nov 2021 12:09:02 GMT

Hello,

Is the driver configured to operate in blocking or non-blocking mode (see Basic usage)? Also, have you checked if nrf_drv_twi_tx() returns with an error code?

Thanks

Vidar