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STM8L152K4 定時(shí)器中斷 初學(xué)者
本程序使用定時(shí)器中斷4，每5ms產(chǎn)生一個(gè)中斷，并在timecreat函數(shù)中進(jìn)行計(jì)時(shí)，在主函數(shù)的while中，通過if語句判斷定時(shí)器中斷時(shí)間后，對gpio口進(jìn)行相應(yīng)操作，函數(shù)如下：
#include "stm8l15x.h"
#include "Define.h"
//以下定義LED與按鍵的接口
#define LED1_GPIO_PORT GPIOC //BLUE
#define LED1_GPIO_PINS GPIO_Pin_4
#define LED2_GPIO_PORT GPIOB //RED
#define LED2_GPIO_PINS GPIO_Pin_0
#define LED3_GPIO_PORT GPIOD //GREEN
#define LED3_GPIO_PINS GPIO_Pin_2
#define KEY1_GPIO_PORT GPIOD //K1
#define KEY1_GPIO_PINS GPIO_Pin_4
#define KEY2_GPIO_PORT GPIOA //K2
#define KEY2_GPIO_PINS GPIO_Pin_2
#define KEY3_GPIO_PORT GPIOB //K3
#define KEY3_GPIO_PINS GPIO_Pin_3
u8 vTcount1,vTcount2;
//unsigned char flag16ms = 0;
ramTime_srtuct ramTime;
void TimeCreate()
{
if(ramTime._5MS)//5ms中斷計(jì)數(shù)一次
{
ramTime._5MS=0;
//pKeyP.TIME_KEY++;
vTcount1++;
if(vTcount1 >19)//有個(gè)邏輯問題不太理解，即在此處定義了時(shí)間，在后續(xù)執(zhí)行調(diào)用變量時(shí)，是順序調(diào)用執(zhí)行還是直接調(diào)用執(zhí)行
{
vTcount1 = 0;
vTcount2++;//到達(dá)500ms
if(vTcount2==5)ramTime._500MS = 1;
else if(vTcount2==7)ramTime._700MS = 1;//到達(dá)700ms
else if(vTcount2==10)
{
ramTime._1S= 1;//到達(dá)1s
vTcount2=0;
}
}
}
}
/*GPIO初始化*/
void gpio_init()
{
// GPIO_Init(LED1_GPIO_PORT, LED1_GPIO_PINS, GPIO_Mode_Out_PP_High_Fast);//初始化LED1，GPC4低速推挽輸出
//GPIO_Init(KEY1_GPIO_PORT, KEY1_GPIO_PINS, GPIO_Mode_In_PU_IT);//初始化按鍵1，上拉中斷輸入
GPIO_Init(LED1_GPIO_PORT, LED1_GPIO_PINS, GPIO_Mode_Out_PP_Low_Slow);//帶上拉，推挽輸出低電平
GPIO_Init(LED2_GPIO_PORT, LED2_GPIO_PINS, GPIO_Mode_Out_PP_Low_Slow);//帶上拉，推挽輸出低電平
GPIO_Init(LED3_GPIO_PORT, LED3_GPIO_PINS, GPIO_Mode_Out_PP_Low_Slow);//帶上拉，推挽輸出低電平
//初始化3個(gè)按鍵接口
GPIO_Init(KEY1_GPIO_PORT, KEY1_GPIO_PINS, GPIO_Mode_In_PU_No_IT);//初始化按鍵，GPD4上拉輸入
GPIO_Init(KEY2_GPIO_PORT, KEY2_GPIO_PINS, GPIO_Mode_In_PU_No_IT);//初始化按鍵，GPA2上拉輸入
GPIO_Init(KEY3_GPIO_PORT, KEY3_GPIO_PINS, GPIO_Mode_In_PU_No_IT);//初始化按鍵，GPB3上拉輸入
}
/*定時(shí)器初始化*/
void timer4_init()
{
CLK_PeripheralClockConfig (CLK_Peripheral_TIM4,ENABLE); //使能外設(shè)時(shí)鐘，STM8L默認(rèn)所有外設(shè)時(shí)鐘初始時(shí)關(guān)閉，使用前徐開啟
TIM4_TimeBaseInit(TIM4_Prescaler_128, 200);//..原為0xffff，，，，16M/8/128=15.625K，0xff=255,255*（1/15.625）=0.01632S，大約61次中斷是1S
TIM4_ITConfig(TIM4_IT_Update, ENABLE);//向上溢出中斷，中斷函數(shù)向量號為25
TIM4_Cmd(ENABLE);
}
/*void exti_init()
{
EXTI_DeInit ();
EXTI_SetPinSensitivity (EXTI_Pin_4,EXTI_Trigger_Falling);
}*/
/*按鍵操作函數(shù)*/
void Dokey()
{
int key1;
static unsigned int key_press_time = 0; // ……請記得標(biāo)為靜態(tài)變量
key1=GPIO_ReadInputDataBit(KEY1_GPIO_PORT,KEY1_GPIO_PINS);
if(key1 == 0)
{
if(++key_press_time <=0)--key_press_time;//計(jì)量按鍵時(shí)間，并避免數(shù)據(jù)溢出
if(key_press_time==3000)//長按三秒
{
GPIO_SetBits(LED1_GPIO_PORT,LED1_GPIO_PINS);
}
}else
{
if(20<=key_press_time && key_press_time < 3000)//大于20ms小于3s
{
GPIO_SetBits(LED2_GPIO_PORT,LED2_GPIO_PINS);
}
key_press_time=0;
}
}
/*主函數(shù)*/
int main(void)
{
//exti_init();
timer4_init();
gpio_init();
enableInterrupts();//使能中斷總開關(guān)
ramTime._5MS=0;//srtuct變量，在define.h函數(shù)中定義，用于時(shí)間的調(diào)用
ramTime._100MS=0;
ramTime._500MS=0;
ramTime._700MS=0;
ramTime._1S=0;
// TimeCreate();
while(1)
{
// GPIO_SetBits(LED1_GPIO_PORT,LED1_GPIO_PINS);
// GPIO_SetBits(LED2_GPIO_PORT,LED2_GPIO_PINS);
// GPIO_SetBits(LED3_GPIO_PORT,LED3_GPIO_PINS);
if(ramTime._500MS)
{
ramTime._500MS = 0;
GPIO_ToggleBits(LED2_GPIO_PORT,LED2_GPIO_PINS);
//Dokey();
}
if(ramTime._1S)
{
ramTime._1S = 0;
GPIO_ToggleBits(LED2_GPIO_PORT,LED2_GPIO_PINS);
}
}
}
Define.h函數(shù)
#ifndef __DEFINE_H
#define __DEFINE_H
#include "stm8l15x.h"
typedef struct
{
u8 _5MS;
u8 _100MS;
u8 _500MS;
u8 _700MS;
u8 _1S;
u8 _1000mS;
} ramTime_srtuct;
定時(shí)器4中斷函數(shù)
extern ramTime_srtuct ramTime;
u8 cnt5ms;
INTERRUPT_HANDLER(TIM4_UPD_OVF_TRG_IRQHandler,25)
{
/* In order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction.
*/
/*i++;
if(i==61)
{
GPIO_ToggleBits(GPIOC, GPIO_Pin_4);//翻轉(zhuǎn)GPD4輸出狀態(tài)
i=0;
}*/
TIM4_ClearITPendingBit(TIM4_IT_Update);
//flag16ms ++;
cnt5ms++;
if(cnt5ms>24)
{
cnt5ms=0;
ramTime._5MS=1;
}
}
以上為函數(shù)部分，但該有的中斷效果沒出來，不太會調(diào)，有大神指導(dǎo)下嗎��！
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