STC12单片机从哪可以看出哪个IO口输出PWM

影腾 · 发表于 2014-7-23 20:36:31

#include <STC12C5A60S2.H>

//#include "reg51.h"
#include "intrins.h"

#define FOSC 18432000L

typedef unsigned char BYTE;
typedef unsigned int WORD;

/*Declare SFR associated with the PCA */
//sfr CCON = 0xD8; //PCA control register
//sbit CCF0 = CCON^0; //PCA module-0 interrupt flag
//sbit CCF1 = CCON^1; //PCA module-1 interrupt flag
//sbit CR = CCON^6; //PCA timer run control bit
//sbit CF = CCON^7; //PCA timer overflow flag
//sfr CMOD = 0xD9; //PCA mode register
//sfr CL = 0xE9; //PCA base timer LOW
//sfr CH = 0xF9; //PCA base timer HIGH
//sfr CCAPM0 = 0xDA; //PCA module-0 mode register
//sfr CCAP0L = 0xEA; //PCA module-0 capture register LOW
//sfr CCAP0H = 0xFA; //PCA module-0 capture register HIGH
//sfr CCAPM1 = 0xDB; //PCA module-1 mode register
//sfr CCAP1L = 0xEB; //PCA module-1 capture register LOW
//sfr CCAP1H = 0xFB; //PCA module-1 capture register HIGH
sfr PCAPWM0 = 0xf2;
sfr PCAPWM1 = 0xf3;

void main()
{
CCON = 0; //Initial PCA control register
//PCA timer stop running
//Clear CF flag
//Clear all module interrupt flag
CL = 0; //Reset PCA base timer
CH = 0;
CMOD = 0x02; //Set PCA timer clock source as Fosc/2
//Disable PCA timer overflow interrupt
CCAP0H = CCAP0L = 0x80; //PWM0 port output 50% duty cycle square wave
CCAPM0 = 0x42; //PCA module-0 work in 8-bit PWM mode and no PCA interrupt

CCAP1H = CCAP1L = 0xff; //PWM1 port output 0% duty cycle square wave
PCAPWM1 = 0x03;
CCAPM1 = 0x42; //PCA module-1 work in 8-bit PWM mode and no PCA interrupt

CR = 1; //PCA timer start run
// P1M0=0X00;
// P1M1=0X08;
while (1);
}
从哪可以看出哪个IO口输出PWM