做8路定时器, PWMA+PWMB, [ PWM1, PWM2, PWM3, PWM4, PWM5, PWM6, PWM7, PWM8 ]

神*** · 发表于 2023-8-14 18:43:13

PWM, 做8路定时器, 【PWMA+PWMB】，程序如下
8H8K64U, 【 PWMA+PWMB 】, 做8路定时器
PWMA: 【PWM1, PWM2, PWM3, PWM4】;
PWMB: 【PWM5, PWM6, PWM7, PWM8】;
不作为PWM输出，不作为PWM捕获输入，多出的PWMx通道：
===用剩下的多出的PWMn通道都可以同时当定时器使用，如
===在【PWM1/PWM2输出，PWM5/PWM6捕获】的同时
===可【PWM3/PWM4定时，PWM7/PWM8定时】
/* --- BBS: www.STCAIMCU.com  -----------------------------------------*/
/* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序       */
/*************  功能说明 **************
本例程基于STC8H8K64U为主控芯片的实验箱9进行编写测试，STC8H系列芯片可通用参考.
利用高级PWMA/PWMB中断实现8个定时器功能.
PWMA的时钟频率为 SYSclk/2
PWMA通道1：定时周期 1ms
PWMA通道2：定时周期 2ms
PWMA通道3：定时周期 4ms
PWMA通道4：定时周期 5ms

PWMB的时钟频率为 SYSclk/10000
PWMB通道1：定时周期 1s
PWMB通道2：定时周期 2s
PWMB通道3：定时周期 3s
PWMB通道4：定时周期 4s

下载时, 选择时钟 24MHZ (用户可自行修改频率).
******************************************/
#include "stc8h.h"
#include "intrins.h"

#define    MAIN_Fosc    24000000L //定义主时钟

#define    PSCRA          2
#define    PWMA_T1       MAIN_Fosc/PSCRA/1000 //定时周期 1ms(1KHz)
#define    PWMA_T2       MAIN_Fosc/PSCRA/500    //定时周期 2ms(500Hz)
#define    PWMA_T3       MAIN_Fosc/PSCRA/250    //定时周期 4ms(250Hz)
#define    PWMA_T4       MAIN_Fosc/PSCRA/200    //定时周期 5ms(200Hz)

#define    PSCRB          10000
#define    PWMB_T5       MAIN_Fosc/PSCRB*1    //定时周期 1s
#define    PWMB_T6       MAIN_Fosc/PSCRB*2    //定时周期 2s
#define    PWMB_T7       MAIN_Fosc/PSCRB*3    //定时周期 3s
#define    PWMB_T8       MAIN_Fosc/PSCRB*4    //定时周期 4s

typedef    unsigned char u8;
typedef    unsigned int u16;
typedef    unsigned long u32;

/*****************************************************************************/

void PWMA_Timer();
void PWMB_Timer();

u16 cnt1;
u16 cnt2;
u16 cnt3;
u16 cnt4;
u16 cnt5;
u16 cnt6;
u16 cnt7;
u16 cnt8;

/******************** 主函数 **************************/
void main(void)
{
P_SW2 |= 0x80;                //扩展寄存器(XFR)访问使能

      P0M1 = 0x00; P0M0 = 0x00;    //设置为准双向口
      P1M1 = 0x00; P1M0 = 0x00;    //设置为准双向口
      P2M1 = 0x00; P2M0 = 0x00;    //设置为准双向口
      P3M1 = 0x00; P3M0 = 0x00;    //设置为准双向口
      P4M1 = 0x00; P4M0 = 0x00;    //设置为准双向口
      P5M1 = 0x00; P5M0 = 0x00;    //设置为准双向口
      P6M1 = 0x00; P6M0 = 0x00;    //设置为准双向口
      P7M1 = 0x00; P7M0 = 0x00;    //设置为准双向口

      PWMA_Timer();
      PWMB_Timer();

      P40 = 0;                               //给LED供电
      EA = 1;                      //打开总中断

      while (1);
}

//========================================================================
// 函数: void PWMA_Timer()
// 描述: PWMA配置函数.
// 参数: None
// 返回: none.
// 版本: V1.0, 2021-02-08
//========================================================================
void PWMA_Timer()
{
      PWMA_PSCR = PSCRA-1;       //设置预分频器
      PWMA_ARR = 0xffff;
PWMA_CCER1 = 0x00;
PWMA_CCMR1 = 0x00;
PWMA_CCMR2 = 0x00;
PWMA_CCMR3 = 0x00;
PWMA_CCMR4 = 0x00;
cnt1 = PWMA_CCR1 = PWMA_T1;
cnt2 = PWMA_CCR2 = PWMA_T2;
cnt3 = PWMA_CCR3 = PWMA_T3;
cnt4 = PWMA_CCR4 = PWMA_T4;
      PWMA_IER = 0x1e;          // 使能中断
      PWMA_CR1 |= 0x81;          //使能ARR预装载，开始计时

cnt1 += PWMA_T1;
cnt2 += PWMA_T2;
cnt3 += PWMA_T3;
cnt4 += PWMA_T4;
}

//========================================================================
// 函数: void PWMB_Timer()
// 描述: PWMB配置函数.
// 参数: None
// 返回: none.
// 版本: V1.0, 2021-02-08
//========================================================================
void PWMB_Timer()
{
      PWMB_PSCR = PSCRB-1;       //设置预分频器
      PWMB_ARR = 0xffff;    //设置周期时间
PWMB_CCER1 = 0x00;
PWMB_CCMR1 = 0x00;    //设置冻结模式
PWMB_CCMR2 = 0x00;    //设置冻结模式
PWMB_CCMR3 = 0x00;    //设置冻结模式
PWMB_CCMR4 = 0x00;    //设置冻结模式
cnt5 = PWMB_CCR5 = PWMB_T5;
cnt6 = PWMB_CCR6 = PWMB_T6;
cnt7 = PWMB_CCR7 = PWMB_T7;
cnt8 = PWMB_CCR8 = PWMB_T8;
      PWMB_IER = 0x1e;       // 使能中断
      PWMB_CR1 |= 0x81;    //使能ARR预装载，开始计时

cnt5 += PWMB_T5;
cnt6 += PWMB_T6;
cnt7 += PWMB_T7;
cnt8 += PWMB_T8;
}

//========================================================================
// 函数: PWMA_ISR() interrupt 26
// 描述: PWMA中断函数.
// 参数: None
// 返回: none.
// 版本: V1.0, 2020-12-04
//========================================================================
void PWMA_ISR() interrupt 26
{
u8 sr;

sr = PWMA_SR1;
PWMA_SR1 = 0;

if (sr & 0x02)
{
      PWMA_CCR1 = cnt1;
      cnt1 += PWMA_T1;
      P20 = ~P20;
      P60 = ~P60;
}
if (sr & 0x04)
{
      PWMA_CCR2 = cnt2;
      cnt2 += PWMA_T2;
      P21 = ~P21;
      P61 = ~P61;
}
if (sr & 0x08)
{
      PWMA_CCR3 = cnt3;
      cnt3 += PWMA_T3;
      P22 = ~P22;
      P62 = ~P62;
}
if (sr & 0x10)
{
      PWMA_CCR4 = cnt4;
      cnt4 += PWMA_T4;
      P23 = ~P23;
      P63 = ~P63;
}
}

//========================================================================
// 函数: PWMB_ISR() interrupt 27
// 描述: PWMB中断函数.
// 参数: None
// 返回: none.
// 版本: V1.0, 2020-12-04
//========================================================================
void PWMB_ISR() interrupt 27
{
u8 sr;

sr = PWMB_SR1;
PWMB_SR1 = 0;

if (sr & 0x02)
{
      PWMB_CCR5 = cnt5;
      cnt5 += PWMB_T5;
      P24 = ~P24;
      P64 = ~P64;
}
if (sr & 0x04)
{
      PWMB_CCR6 = cnt6;
      cnt6 += PWMB_T6;
      P25 = ~P25;
      P65 = ~P65;
}
if (sr & 0x08)
{
      PWMB_CCR7 = cnt7;
      cnt7 += PWMB_T7;
      P26 = ~P26;
      P66 = ~P66;
}
if (sr & 0x10)
{
      PWMB_CCR8 = cnt8;
      cnt8 += PWMB_T8;
      P27 = ~P27;
      P67 = ~P67;
}
}