Am I able to set up both a case where a GPIOTE event controls through PPI a Capture event on CC[2] of Timer 2's value as well as when Timer 2 reaches its max value (overflows to = 0) it will activate a COMPARE event on CC[2] or will I need to use another CC register? Here is some sample code
void system_timer_cc_0_2_init(void)
{
uint32_t capture_task_addr;
uint32_t gpiote_evt_addr;
ret_code_t err_code;
nrf_drv_gpiote_in_config_t in_config;
/* CC[2]
* Setup PPI tasks for GPIOTE and system timer channel[2]
*/
//VCE: The below block needs to be called for each pin
in_config.pull = NRF_GPIO_PIN_NOPULL; //User defined
in_config.sense = NRF_GPIOTE_POLARITY_LOTOHI; //User defined
in_config.hi_accuracy = true; //User defined
in_config.is_watcher = false; //Don't change this
in_config.skip_gpio_setup = false; //Don't change this
//enable the pin for GPIOTE
err_code = nrf_drv_gpiote_in_init(SPEEDO_TACHO_PIN_NUMBER, &in_config, speedo_tach_input_handler);
APP_ERROR_CHECK(err_code);
//setup a ppi channel to associate with the system_timer_cc_0_2 compare events
err_code = nrf_drv_ppi_channel_alloc(&(ppi_channel[2]));
APP_ERROR_CHECK(err_code);
capture_task_addr = nrf_drv_timer_event_address_get(&system_timer_cc_0_2, NRF_TIMER_TASK_CAPTURE2);
gpiote_evt_addr = nrf_drv_gpiote_in_event_addr_get(SPEEDO_TACHO_PIN_NUMBER);
err_code = nrf_drv_ppi_channel_assign(ppi_channel[2], gpiote_evt_addr, capture_task_addr);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_enable(ppi_channel[2]);
APP_ERROR_CHECK(err_code);
// check for timer2 overflow which will be 2^16 -1 = 65535
NRF_TIMER2->CC[2] = 65535;
nrf_drv_gpiote_in_event_enable(SPEEDO_TACHO_PIN_NUMBER, true);
//Once all system_timer_cc_0_2 shared peripherals are ready, enable the shared timer
nrf_drv_timer_enable(&system_timer_cc_0_2);
}
