NRF52832 twi does not find ATECC508A

RE: NRF52832 twi does not find ATECC508A

Jørgen Holmefjord — Tue, 17 Mar 2020 09:19:32 GMT

That is strange, the TWI peripheral should not proceed with the data if the slave does not ACK the address. It is hard to say anything about what could be causing this without seeing a logic trace of the bus, etc.

RE: NRF52832 twi does not find ATECC508A

sam — Tue, 17 Mar 2020 01:01:16 GMT

hi,

thanks for the reply, i did use TWI scanner and found the correct address of my I2C device,

strange thing is, if I send write command when I got ADDRESS_NACK, sometimes i get DATA_NACK,

I suspect that I sent the wrong command packet to I2C?

thanks..

RE: NRF52832 twi does not find ATECC508A

Jørgen Holmefjord — Mon, 16 Mar 2020 10:04:11 GMT

If you get an address or data NACK, the TWI peripheral does not find the device on the TWI bus. Are you sure that the address and pin connections are correct? You can check that the device is detected and its address by running the TWI Scanner example.

RE: NRF52832 twi does not find ATECC508A

sam — Fri, 13 Mar 2020 03:38:11 GMT

Hi,

I also have this problem, when connect to ATECC508A and send a simple info command, but I always got

NRF_DRV_TWI_EVT_ADDRESS_NACK and NRF_DRV_TWI_EVT_DATA_NACK and never get it done.

I re-send the info command when receiving NRF_DRV_TWI_EVT_ADDRESS_NACK or NRF_DRV_TWI_EVT_DATA_NACK but situation is the same.

Any idea what's wrong?

thanks..

RE: NRF52832 twi does not find ATECC508A

Jørgen Holmefjord — Tue, 23 May 2017 14:05:47 GMT

Great! Thanks for reporting back what the issue was.

RE: NRF52832 twi does not find ATECC508A

Maidu — Tue, 23 May 2017 14:04:58 GMT

Got it working. I quess it was HW issue.

RE: NRF52832 twi does not find ATECC508A

Jørgen Holmefjord — Tue, 23 May 2017 14:02:22 GMT

What is the error reported in NRF_TWIM_EVENT_ERROR? You can enable debug logging in the TWI module by setting TWI_CONFIG_LOG_ENABLED 1 and TWI_CONFIG_LOG_LEVEL 4 in sdk_config.h.

RE: NRF52832 twi does not find ATECC508A

Maidu — Mon, 22 May 2017 09:36:41 GMT

Pins are ok. Using latest SDK driver nrf_drv_twi.c code stays forever in loop

while (!nrf_twim_event_check(p_twim, evt_to_wait))
        {
            if (nrf_twim_event_check(p_twim, NRF_TWIM_EVENT_ERROR))
            {
                NRF_LOG_DEBUG("TWIM: Event: %s.\r\n",
                              (uint32_t)EVT_TO_STR_TWIM(NRF_TWIM_EVENT_ERROR));
                nrf_twim_event_clear(p_twim, NRF_TWIM_EVENT_ERROR);
                nrf_twim_task_trigger(p_twim, NRF_TWIM_TASK_RESUME);
                nrf_twim_task_trigger(p_twim, NRF_TWIM_TASK_STOP);
                evt_to_wait = NRF_TWIM_EVENT_STOPPED;
            }
        }

I check the bus with logic analyzer.

RE: NRF52832 twi does not find ATECC508A

Jørgen Holmefjord — Mon, 22 May 2017 09:29:17 GMT

Have you checked that you have connected the correct pins defined in your code? Do you get any error codes? Have you checked the bus using a logic analyzer, to see if there are any activity?