Using nrf_drv_ppi_channel_assign() to trigger timer clear task?

[rdpoor]

I'm trying to be a good camper and stick to published SDK interfaces, but I'm stuck on one point.

I want to use the PPI to toggle a GPIO pin AND clear the timer on a timer CC event.  So I have something like:

uint32_t cc0_eep = nrf_drv_timer_compare_event_address_get(&m_timer, NRF_TIMER_CC_CHANNEL0); err_code = nrf_drv_ppi_channel_assign(&ppi_channel, cc0_eep, nrfx_gpiote_set_task_addr_get(pin)); APP_ERROR_CHECK(err_code); err_code = nrf_drv_ppi_channel_fork_assign(&ppi_channel, cc0_eep, nrfx_timer_clear_task_addr_get(&m_timer)); // this is wrong APP_ERROR_CHECK(err_code);

My confusion is that there is no function "nrfx_timer_clear_task_addr_get()".  What's the right argument to pass here?

(Related, but less critical: is it possible to mix calls to shortcuts and regular nrf_drv_ppi_channel_assign()?  If so, how?)

[rdpoor]

I think i've answered my own question, but let me know if this is incorrect!  

uint32_t cc0_eep = nrf_drv_timer_compare_event_address_get(&m_timer, 
                                                           NRF_TIMER_CC_CHANNEL0);

err_code = nrf_drv_ppi_channel_assign(&ppi_channel, 
                                      cc0_eep, 
                                      nrfx_gpiote_set_task_addr_get(pin));
APP_ERROR_CHECK(err_code);

err_code = nrf_drv_ppi_channel_fork_assign(&ppi_channel, 
                                           cc0_eep, 
                                           nrfx_timer_task_address_get(&m_timer,
                                                                       NRF_TIMER_TASK_CLEAR));
APP_ERROR_CHECK(err_code);

In particular, nfrx_timer_task_addr_get() takes a second argument describing what kind of task to trigger.