Get TWI event address ( TWI + PPI)

RE: Get TWI event address ( TWI + PPI)

Dmitry — Tue, 20 Oct 2020 18:08:59 GMT

You're trying to mix driver and HAL layers - nrf_twi_event_address_get expects an address of TWI peripheral, not an instance structure. It's possible to use an address of TWI peripheral directly (NRF_TWI0 for instance 0 and so on), but the right way is to work only with HAL functions if you need a low-level access to twi registers.

RE: Get TWI event address ( TWI + PPI)

Alanarf — Tue, 20 Oct 2020 11:58:58 GMT

I tried both commands

     uint32_t *twi_evt = nrf_twi_event_address_get(&m_twi,NRF_TWI_EVENT_BB);

     uint32_t twi_event_addr = nrf_drv_twi_event_address_get(&m_twi,NRF_TWI_EVENT_RXDREADY);

In both i got warnings.

..\..\..\main.c(499): error: #167: argument of type "const nrf_drv_twi_t *" is incompatible with parameter of type "NRF_TWI_Type *" -> first line

Implicity declaration of nrf_drv_twi_event_address_get is invalid in c99 -> second line

RE: Get TWI event address ( TWI + PPI)

Alanarf — Tue, 20 Oct 2020 10:37:27 GMT

Also this is the line that i am using in ppi_init to then assign event and tasks:

uint32_t *twi_evt = nrf_twi_event_address_get(&m_twi,NRF_TWI_EVENT_BB);

RE: Get TWI event address ( TWI + PPI)

Alanarf — Tue, 20 Oct 2020 10:17:16 GMT

Hello Dmitry, thanks for reply.

My bad, replaced nrf_drv_twi_event_address_get to nrf_twi_event_address_get and got new errors

Any help?

..\..\..\main.c(499): error: #167: argument of type "const nrf_drv_twi_t *" is incompatible with parameter of type "NRF_TWI_Type *"
uint32_t *twi_evt = nrf_twi_event_address_get(&m_twi,NRF_TWI_EVENT_BB);
..\..\..\main.c(540): error: #167: argument of type "uint32_t *" is incompatible with parameter of type "uint32_t"
err_code = nrf_drv_ppi_channel_assign(ppi_channel_5, twi_evt,

RE: Get TWI event address ( TWI + PPI)

Dmitry — Mon, 19 Oct 2020 19:20:57 GMT

Hi,

it seems you're mistyping nrf_drv_twi_event_address_get (should be nrf_twi_event_address_get)