/** @file
*
* @defgroup gpiote_example_main main.c
* @{
* @ingroup nrf_gpiote_example
* @brief GPIOTE Example Application main file.
*
* This file contains the source code for a sample application using GPIOTE.
*/
#include <stdbool.h>
#include <stdint.h>
#include "nrf.h"
#include "nrf_gpiote.h"
#include "nrf_gpio.h"
#include "boards.h"
#include "nrf_drv_ppi.h"
#include "nrf_drv_timer.h"
#include "nrf_drv_gpiote.h"
#include "app_error.h"
#ifdef BSP_LED_0
#define GPIO_OUTPUT_PIN_NUMBER BSP_LED_0 /**< Pin number for output. */
#endif
#ifndef GPIO_OUTPUT_PIN_NUMBER
#error "Please indicate output pin"
#endif
static nrf_drv_timer_t timer = NRF_DRV_TIMER_INSTANCE(0);
void timer_dummy_handler(nrf_timer_event_t event_type, void * p_context){}
static void led_blinking_setup()
{
uint32_t compare_evt_addr;
uint32_t gpiote_task_addr;
nrf_ppi_channel_t ppi_channel;
ret_code_t err_code;
nrf_drv_gpiote_out_config_t config = GPIOTE_CONFIG_OUT_TASK_TOGGLE(false);
err_code = nrf_drv_gpiote_out_init(GPIO_OUTPUT_PIN_NUMBER, &config);
APP_ERROR_CHECK(err_code);
nrf_drv_timer_extended_compare(&timer, (nrf_timer_cc_channel_t)0, 200 * 1000UL, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, false);
err_code = nrf_drv_ppi_channel_alloc(& ppi_channel);
APP_ERROR_CHECK(err_code);
compare_evt_addr = nrf_drv_timer_event_address_get(&timer, NRF_TIMER_EVENT_COMPARE0);
gpiote_task_addr = nrf_drv_gpiote_out_task_addr_get(GPIO_OUTPUT_PIN_NUMBER);
err_code = nrf_drv_ppi_channel_assign( ppi_channel, compare_evt_addr, gpiote_task_addr);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_enable(ppi_channel);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_out_task_enable(GPIO_OUTPUT_PIN_NUMBER);
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
ret_code_t err_code;
err_code = nrf_drv_ppi_init();
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_gpiote_init();
APP_ERROR_CHECK(err_code);
nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
err_code = nrf_drv_timer_init(&timer, &timer_cfg, timer_dummy_handler);
APP_ERROR_CHECK(err_code);
#ifdef NRF51
//Workaround for PAN-73.
*(uint32_t *)0x40008C0C = 1;
#endif
// Setup PPI channel with event from TIMER compare and task GPIOTE pin toggle.
led_blinking_setup();
// Enable timer
nrf_drv_timer_enable(&timer);
while (true)
{
// Do Nothing - GPIO can be toggled without software intervention.
}
}
/** @} */
*
* @defgroup gpiote_example_main main.c
* @{
* @ingroup nrf_gpiote_example
* @brief GPIOTE Example Application main file.
*
* This file contains the source code for a sample application using GPIOTE.
*/
#include <stdbool.h>
#include <stdint.h>
#include "nrf.h"
#include "nrf_gpiote.h"
#include "nrf_gpio.h"
#include "boards.h"
#include "nrf_drv_ppi.h"
#include "nrf_drv_timer.h"
#include "nrf_drv_gpiote.h"
#include "app_error.h"
#ifdef BSP_LED_0
#define GPIO_OUTPUT_PIN_NUMBER BSP_LED_0 /**< Pin number for output. */
#endif
#ifndef GPIO_OUTPUT_PIN_NUMBER
#error "Please indicate output pin"
#endif
static nrf_drv_timer_t timer = NRF_DRV_TIMER_INSTANCE(0);
void timer_dummy_handler(nrf_timer_event_t event_type, void * p_context){}
static void led_blinking_setup()
{
uint32_t compare_evt_addr;
uint32_t gpiote_task_addr;
nrf_ppi_channel_t ppi_channel;
ret_code_t err_code;
nrf_drv_gpiote_out_config_t config = GPIOTE_CONFIG_OUT_TASK_TOGGLE(false);
err_code = nrf_drv_gpiote_out_init(GPIO_OUTPUT_PIN_NUMBER, &config);
APP_ERROR_CHECK(err_code);
nrf_drv_timer_extended_compare(&timer, (nrf_timer_cc_channel_t)0, 200 * 1000UL, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, false);
err_code = nrf_drv_ppi_channel_alloc(& ppi_channel);
APP_ERROR_CHECK(err_code);
compare_evt_addr = nrf_drv_timer_event_address_get(&timer, NRF_TIMER_EVENT_COMPARE0);
gpiote_task_addr = nrf_drv_gpiote_out_task_addr_get(GPIO_OUTPUT_PIN_NUMBER);
err_code = nrf_drv_ppi_channel_assign( ppi_channel, compare_evt_addr, gpiote_task_addr);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_enable(ppi_channel);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_out_task_enable(GPIO_OUTPUT_PIN_NUMBER);
}
/**
* @brief Function for application main entry.
*/
int main(void)
{
ret_code_t err_code;
err_code = nrf_drv_ppi_init();
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_gpiote_init();
APP_ERROR_CHECK(err_code);
nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
err_code = nrf_drv_timer_init(&timer, &timer_cfg, timer_dummy_handler);
APP_ERROR_CHECK(err_code);
#ifdef NRF51
//Workaround for PAN-73.
*(uint32_t *)0x40008C0C = 1;
#endif
// Setup PPI channel with event from TIMER compare and task GPIOTE pin toggle.
led_blinking_setup();
// Enable timer
nrf_drv_timer_enable(&timer);
while (true)
{
// Do Nothing - GPIO can be toggled without software intervention.
}
}
/** @} */