nordic 52832 创建精准时间定时器
作者:互联网
转自:https://blog.csdn.net/gyb510/article/details/51842834/
nrf52832 有五个定时器,timer0--timer4 。因为SDK已经使用了timer0,所以如果使用了SDK,就不能再使用timer0,只能使用timer1--timer4。
开发环境:在ble_app_hrs demo上添加定时器任务 参考timer这个demo。
本例使用timer1,并且修改为32bit模式
添加步骤:
1、添加驱动文件 nrf_drv_timer.c 在协议栈中的目录位置 : nRF52_SDK\components\drivers_nrf\timer文件夹下
2、mian.c中添加头文件nrf_drv_timer.h
#include "nrf_drv_timer.h"
3、main.c中添加timer结构体变量:
const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(1);
4、在main.c中添加timer1 初始化函数以及定时任务处理函数:
/**
* @brief Handler for timer events.
*/
void timer_led_event_handler(nrf_timer_event_t event_type, void* p_context)
{
// uint32_t led_to_invert = (1 << leds_list[(i++) % LEDS_NUMBER]);
// printf("6\n");
switch(event_type)
{
case NRF_TIMER_EVENT_COMPARE0:
// LEDS_INVERT(led_to_invert);
ledFlash();
break;
default:
//Do nothing.
break;
}
}
void myTimerInit()
{
uint32_t time_ms = 1000; //Time(in miliseconds) between consecutive compare events.
uint32_t time_ticks;
uint32_t err_code = NRF_SUCCESS;
//Configure all leds on board.
//Configure TIMER_LED for generating simple light effect - leds on board will invert his state one after the other.
err_code = nrf_drv_timer_init(&TIMER_LED, NULL, timer_led_event_handler);
APP_ERROR_CHECK(err_code);
time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_LED, time_ms);
nrf_drv_timer_extended_compare(
&TIMER_LED, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
nrf_drv_timer_enable(&TIMER_LED);
}
5、main函数中添加timer初始化调用:
myTimerInit();
6、在nrf_driver_config.c中修改timer1的定义:
#define TIMER1_ENABLED 1
#if (TIMER1_ENABLED == 1)
#define TIMER1_CONFIG_FREQUENCY NRF_TIMER_FREQ_16MHz
#define TIMER1_CONFIG_MODE TIMER_MODE_MODE_Timer
#define TIMER1_CONFIG_BIT_WIDTH TIMER_BITMODE_BITMODE_32Bit
#define TIMER1_CONFIG_IRQ_PRIORITY APP_IRQ_PRIORITY_LOW
标签:timer,定时器,LED,nrf,TIMER,drv,nordic,TIMER1,52832 来源: https://blog.csdn.net/schumi2000/article/details/86665632