Hello all,
Going through the nRF Connect SDK Intermediate course with my nRF54L15 DK, I stumbled upon a problem at step 6 of exercise 3 - Interfacing with ADC using nrfx drivers and TIMER/PPI.
Because I am using the nRF54L15, I #include the nrfx_dppi.h file instead of the nrfc_ppi.h file.
Such is configured here:
#if defined(DPPI_PRESENT) #include <nrfx_dppi.h> #else #include <nrfx_ppi.h> #endif
When I arrive at step 6: Setup the (D)PPI channels. I am not able to build the application since the function in that step utilizes function calls which are defined in nrfx_ppi.h.
This is the function described in step 6:
static void configure_ppi(void)
{
nrfx_err_t err;
/* Declare variables used to hold the (D)PPI channel number */
uint8_t m_saadc_sample_ppi_channel;
uint8_t m_saadc_start_ppi_channel;
/* Trigger task sample from timer */
err = nrfx_gppi_channel_alloc(&m_saadc_sample_ppi_channel);
if (err != NRFX_SUCCESS) {
LOG_ERR("nrfx_gppi_channel_alloc error: %08x", err);
return;
}
err = nrfx_gppi_channel_alloc(&m_saadc_start_ppi_channel);
if (err != NRFX_SUCCESS) {
LOG_ERR("nrfx_gppi_channel_alloc error: %08x", err);
return;
}
/* Trigger task sample from timer */
nrfx_gppi_channel_endpoints_setup(m_saadc_sample_ppi_channel,
nrfx_timer_compare_event_address_get(&timer_instance, NRF_TIMER_CC_CHANNEL0),
nrf_saadc_task_address_get(NRF_SAADC, NRF_SAADC_TASK_SAMPLE));
/* Trigger task start from end event */
nrfx_gppi_channel_endpoints_setup(m_saadc_start_ppi_channel,
nrf_saadc_event_address_get(NRF_SAADC, NRF_SAADC_EVENT_END),
nrf_saadc_task_address_get(NRF_SAADC, NRF_SAADC_TASK_START));
/* Enable both (D)PPI channels */
nrfx_gppi_channels_enable(BIT(m_saadc_sample_ppi_channel));
nrfx_gppi_channels_enable(BIT(m_saadc_start_ppi_channel));
}
The functions referenced are:
- nrfx_gppi_channel_alloc
- nrfx_gppi_channel_endpoints_setup
- nrfx_gppi_channels_enable
Is there a DPPI version available for this exercise?
Thank you.
