【N32L40X】学习笔记08-定时器的基本定时功能-超时功能

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);
		
	}
}