1.在sdk_config.h中加入宏
// app_button - buttons handling module
//==========================================================
// BUTTON_ENABLED - Enables Button module
#ifndef BUTTON_ENABLED
#define BUTTON_ENABLED 1
#endif
// BUTTON_HIGH_ACCURACY_ENABLED - Enables GPIOTE high accuracy for buttons
#ifndef BUTTON_HIGH_ACCURACY_ENABLED
#define BUTTON_HIGH_ACCURACY_ENABLED 0
#endif
// APP_TIMER_ENABLED - app_timer - Application timer functionality
//==========================================================
#ifndef APP_TIMER_ENABLED
#define APP_TIMER_ENABLED 1
#endif
// APP_TIMER_CONFIG_RTC_FREQUENCY - Configure RTC prescaler.
// 32768 Hz
// 16384 Hz
// 8192 Hz
// 4096 Hz
// 2048 Hz
// 1024 Hz
#ifndef APP_TIMER_CONFIG_RTC_FREQUENCY
#define APP_TIMER_CONFIG_RTC_FREQUENCY 0
#endif
// APP_TIMER_CONFIG_IRQ_PRIORITY - Interrupt priority
// Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice
// 0 (highest)
// 1
// 2
// 3
// 4
// 5
// 6
// 7
#ifndef APP_TIMER_CONFIG_IRQ_PRIORITY
#define APP_TIMER_CONFIG_IRQ_PRIORITY 6
#endif
// APP_TIMER_CONFIG_OP_QUEUE_SIZE - Capacity of timer requests queue.
// Size of the queue depends on how many timers are used
// in the system, how often timers are started and overall
// system latency. If queue size is too small app_timer calls
// will fail.
#ifndef APP_TIMER_CONFIG_OP_QUEUE_SIZE
#define APP_TIMER_CONFIG_OP_QUEUE_SIZE 10
#endif
// APP_TIMER_CONFIG_USE_SCHEDULER - Enable scheduling app_timer events to app_scheduler
#ifndef APP_TIMER_CONFIG_USE_SCHEDULER
#define APP_TIMER_CONFIG_USE_SCHEDULER 0
#endif
// APP_TIMER_KEEPS_RTC_ACTIVE - Enable RTC always on
// If option is enabled RTC is kept running even if there is no active timers.
// This option can be used when app_timer is used for timestamping.
#ifndef APP_TIMER_KEEPS_RTC_ACTIVE
#define APP_TIMER_KEEPS_RTC_ACTIVE 0
#endif
// APP_TIMER_SAFE_WINDOW_MS - Maximum possible latency (in milliseconds) of handling app_timer event.
// Maximum possible timeout that can be set is reduced by safe window.
// Example: RTC frequency 16384 Hz, maximum possible timeout 1024 seconds - APP_TIMER_SAFE_WINDOW_MS.
// Since RTC is not stopped when processor is halted in debugging session, this value
// must cover it if debugging is needed. It is possible to halt processor for APP_TIMER_SAFE_WINDOW_MS
// without corrupting app_timer behavior.
#ifndef APP_TIMER_SAFE_WINDOW_MS
#define APP_TIMER_SAFE_WINDOW_MS 300000
#endif
// App Timer Legacy configuration - Legacy configuration.
//==========================================================
// APP_TIMER_WITH_PROFILER - Enable app_timer profiling
#ifndef APP_TIMER_WITH_PROFILER
#define APP_TIMER_WITH_PROFILER 0
#endif
// APP_TIMER_CONFIG_SWI_NUMBER - Configure SWI instance used.
#ifndef APP_TIMER_CONFIG_SWI_NUMBER
#define APP_TIMER_CONFIG_SWI_NUMBER 0
#endif
//==========================================================
// GPIOTE_ENABLED - nrf_drv_gpiote - GPIOTE peripheral driver - legacy layer
//==========================================================
#ifndef GPIOTE_ENABLED
#define GPIOTE_ENABLED 1
#endif
// GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS - Number of lower power input pins
#ifndef GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS
#define GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS 4
#endif
// GPIOTE_CONFIG_IRQ_PRIORITY - Interrupt priority
// Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice
// 0 (highest)
// 1
// 2
// 3
// 4
// 5
// 6
// 7
#ifndef GPIOTE_CONFIG_IRQ_PRIORITY
#define GPIOTE_CONFIG_IRQ_PRIORITY 6
#endif
//
// NRFX_GPIOTE_ENABLED - nrfx_gpiote - GPIOTE peripheral driver
//==========================================================
#ifndef NRFX_GPIOTE_ENABLED
#define NRFX_GPIOTE_ENABLED 1
#endif
// NRFX_GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS - Number of lower power input pins
#ifndef NRFX_GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS
#define NRFX_GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS 1
#endif
// NRFX_GPIOTE_CONFIG_IRQ_PRIORITY - Interrupt priority
// 0 (highest)
// 1
// 2
// 3
// 4
// 5
// 6
// 7
#ifndef NRFX_GPIOTE_CONFIG_IRQ_PRIORITY
#define NRFX_GPIOTE_CONFIG_IRQ_PRIORITY 6
#endif
// NRFX_GPIOTE_CONFIG_LOG_ENABLED - Enables logging in the module.
//==========================================================
#ifndef NRFX_GPIOTE_CONFIG_LOG_ENABLED
#define NRFX_GPIOTE_CONFIG_LOG_ENABLED 0
#endif
// NRFX_GPIOTE_CONFIG_LOG_LEVEL - Default Severity level
// Off
// Error
// Warning
// Info
// Debug
#ifndef NRFX_GPIOTE_CONFIG_LOG_LEVEL
#define NRFX_GPIOTE_CONFIG_LOG_LEVEL 3
#endif
// NRFX_GPIOTE_CONFIG_INFO_COLOR - ANSI escape code prefix.
// Default
// Black
// Red
// Green
// Yellow
// Blue
// Magenta
// Cyan
// White
#ifndef NRFX_GPIOTE_CONFIG_INFO_COLOR
#define NRFX_GPIOTE_CONFIG_INFO_COLOR 0
#endif
// NRFX_GPIOTE_CONFIG_DEBUG_COLOR - ANSI escape code prefix.
// Default
// Black
// Red
// Green
// Yellow
// Blue
// Magenta
// Cyan
// White
#ifndef NRFX_GPIOTE_CONFIG_DEBUG_COLOR
#define NRFX_GPIOTE_CONFIG_DEBUG_COLOR 0
#endif
2.导入文件nrfx_gpiote.c,bsp.c,app_timer.c,app_button.c到工程中
3.在bsp_config.h中，确保#if !defined(BSP_DEFINES_ONLY) && !defined(BSP_SIMPLE)条件为真，否则会编绎错误
4.引入头文件
#include "bsp.h"
#include "app_timer.h"
5.自定义按键分配的事件值
#define GPIO16_SHORT_PRESS 18
#define GPIO16_LONG_PRESS 19
#define GPIO16_RELEASE 20
6.定义按键事件处理函数
/**@brief Function for handling bsp events.
*/
void bsp_evt_handler(bsp_event_t evt)
{
uint32_t err_code;
switch (evt)
{
case GPIO16_SHORT_PRESS:
printf("GPIO16_SHORT_PRESS\n");
break;
case GPIO16_LONG_PRESS:
printf("GPIO16_LONG_PRESS\n");
break;
case GPIO16_RELEASE:
printf("GPIO16_RELEASE\n");
break;
default:
return; // no implementation needed
}
}
7.低速时钟初时化
/**@brief Function for initializing low frequency clock.
*/
void clock_initialization()
{
NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_Xtal EVENTS_LFCLKSTARTED = 0;
NRF_CLOCK->TASKS_LFCLKSTART = 1;
while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0)
{
// Do nothing.
}
}
8.BSP初时化
/**@brief Function for initializing bsp module.
*/
void bsp_configuration()
{
uint32_t err_code;
err_code = bsp_init( BSP_INIT_BUTTONS, bsp_evt_handler);
APP_ERROR_CHECK(err_code);
err_code = bsp_event_to_button_action_assign(3,
BSP_BUTTON_ACTION_PUSH,
GPIO16_SHORT_PRESS);
err_code = bsp_event_to_button_action_assign(3,
BSP_BUTTON_ACTION_RELEASE,
GPIO16_RELEASE);
APP_ERROR_CHECK(err_code);
err_code = bsp_event_to_button_action_assign(3,
BSP_BUTTON_ACTION_LONG_PUSH,
GPIO16_LONG_PRESS);
APP_ERROR_CHECK(err_code);
}
9.在主函数中的处理
clock_initialization();
err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
bsp_configuration();
