定时器的基本定时功能

1. 该函数库的目的就是在统一的地方配置，将配置的不同项放置在一个结构体内部
2. 使用一个枚举来定义一个的别名
3. 该库就是基本定时产生超时中断

bsp_time_base.h

#ifndef _BSP_BASE_TIME_H_
#define _BSP_BASE_TIME_H_#include <stdint.h>
#include "n32l40x.h"typedef enum
{TIME_ID_1,
//	TIME_ID_2,
//	TIME_ID_3,TIME_NUM//led数量
}TIME_ID;typedef struct
{TIM_Module* time;uint32_t time_rcc;uint16_t irq_x;uint32_t period;//重载值uint32_t prescaler;//预分频器uint8_t it_update;//是否使能更新中断
}time_t;/*** 基本定时器初始化*/
void bsp_time_init(time_t *ptime);
//一键初始化所有定时器
void bsp_timers_init(void);#endif

bsp_time_base.c

#include "bsp_include.h"
#include "timer/bsp_time.h"static time_t s_times[TIME_NUM] = {{TIM7,RCC_APB1_PERIPH_TIM7,TIM7_IRQn,3200,10000,1},//1ms
};/*** 中断相关初始化.*/
static void bsp_time_nvic_config(time_t *ptime)
{NVIC_InitType NVIC_InitStructure;/* Enable the TIM1 global Interrupt */NVIC_InitStructure.NVIC_IRQChannel                   = ptime->irq_x;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 7;NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 0;NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;NVIC_Init(&NVIC_InitStructure);TIM_ConfigInt(ptime->time, TIM_INT_UPDATE, ENABLE);
}static void bsp_time_rcc_config(time_t *ptime)
{if(ptime->time==TIM1||ptime->time==TIM8){RCC_EnableAPB2PeriphClk(ptime->time_rcc, ENABLE);}else{RCC_EnableAPB1PeriphClk(ptime->time_rcc, ENABLE);}}/*** 基本定时器初始化*/
void bsp_time_init(time_t *ptime)
{TIM_TimeBaseInitType TIM_TimeBaseStructure;/* 定时器时钟分频PCLK1 = HCLK/4 */// RCC_ConfigPclk2(RCC_HCLK_DIV4);/* 1.时钟使能 */bsp_time_rcc_config(ptime);/* Compute the prescaler value */// PrescalerValue = 0; //(uint16_t) (SystemCoreClock / 12000000) - 1;/* Time 2.基本配置 */TIM_TimeBaseStructure.Period    = ptime->period;TIM_TimeBaseStructure.Prescaler = ptime->prescaler;//预分频器TIM_TimeBaseStructure.ClkDiv    = 0;TIM_TimeBaseStructure.CntMode   = TIM_CNT_MODE_UP;TIM_InitTimeBase(ptime->time, &TIM_TimeBaseStructure);//3.使能更新中断if(ptime->it_update){bsp_time_nvic_config(ptime)	;}/* 4.TIM1 使能计数 */TIM_Enable(ptime->time, ENABLE);
}//一键初始化所有定时器
void bsp_timers_init(void)
{for(int i=0; i<TIME_NUM; i++){bsp_time_init(s_times+i);}
}static uint8_t bsp_time_get_id(TIM_Module *tim)
{for(uint8_t x=0;x<TIME_NUM;x++){if(tim ==s_times[x].time)return x;}return 0xff;
}
//定时器中断集中处理函数
static void bsp_time_iaq(time_t *ptime)
{if (TIM_GetIntStatus(ptime->time, TIM_INT_UPDATE) != RESET){TIM_ClrIntPendingBit(ptime->time, TIM_INT_UPDATE);}}
void TIM7_IRQHandler(void)
{uint8_t id=bsp_time_get_id(TIM7);if(0XFF!=id){bsp_time_iaq(s_times+id);led_on_blink(LED1);}
}