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10.4.用PCA功能擴展外部中斷的示例程序(C程序和匯編程序)
1. C程序：
/*------------------------------------------------------------------------------------*/
/* --- STC MCU Limited ---------------- ---------------------------------------*/
/* --- 演示 STC 1T 系列單片機 用PCA功能擴展外部中斷 -----------*/
/* --- Mobile: (86)13922809991 -----------------------------------------------*/
/* --- Fax: 86-755-82905966 ---------------------------------------------------*/
/* --- Tel: 86-755-82948412 ----------------------------------------------------*/
/* --- Web:-----------------------------------------------*/
/* 如果要在程序中使用或在文章中引用該程序， -------------------- ---*/
/* 請在程序中或文章中注明使用了STC的資料及程序 -----------*/
/*-------------------------------------------------------------------------------------*/
#include "reg51.h"
#include "intrins.h"
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;
sbit PCA_LED = P1^0; //PCA test LED
void PCA_isr() interrupt 7 using 1
{
CCF0 = 0; //Clear interrupt flag
PCA_LED = !PCA_LED; //toggle the test pin while CEX0(P1.3) have a falling edge
}
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 = 0x00; //Set PCA timer clock source as Fosc/12
//Disable PCA timer overflow interrupt
CCAPM0 = 0x11; //PCA module-0 capture by a negative tigger on CEX0(P1.3)
//and enable PCA interrupt
//CCAPM0 = 0x21; //PCA module-0 capture by a rising edge on CEX0(P1.3)
//and enable PCA interrupt
//CCAPM0 = 0x31; //PCA module-0 capture by a transition (falling/rising edge)
//on CEX0(P1.3) and enable PCA interrupt
CR = 1; //PCA timer start run
EA = 1;
while (1);
}
10.5.用PCA功能實現定時器的示例程序(C程序和匯編程序)
1. C程序：
/*------------------------------------------------------------------------------------*/
/* --- STC MCU Limited ---------------- ---------------------------------------*/
/* --- 演示 STC 1T 系列單片機 用PCA功能實現16位定時器 --------*/
/* --- Mobile: (86)13922809991 -----------------------------------------------*/
/* --- Fax: 86-755-82905966 ---------------------------------------------------*/
/* --- Tel: 86-755-82948412 ----------------------------------------------------*/
/* --- Web:-----------------------------------------------*/
/* 如果要在程序中使用或在文章中引用該程序， -------------------- ---*/
/* 請在程序中或文章中注明使用了STC的資料及程序 -----------*/
/*-------------------------------------------------------------------------------------*/
#include "reg51.h"
#include "intrins.h"
#define FOSC 18432000L
#define T100Hz (FOSC / 12 / 100)
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;
sbit PCA_LED = P1^0; //PCA test LED
BYTE cnt;
WORD value;
void PCA_isr() interrupt 7 using 1
{
CCF0 = 0; //Clear interrupt flag
CCAP0L = value;
CCAP0H = value >> 8; //Update compare value
value += T100Hz;
if (cnt-- == 0)
{
cnt = 100; //Count 100 times
PCA_LED = !PCA_LED; //Flash once per second
}
}
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 = 0x00; //Set PCA timer clock source as Fosc/12
//Disable PCA timer overflow interrupt
value = T100Hz;
CCAP0L = value;
CCAP0H = value >> 8; //Initial PCA module-0
value += T100Hz;
CCAPM0 = 0x49; //PCA module-0 work in 16-bit timer mode
//and enable PCA interrupt
CR = 1; //PCA timer start run
EA = 1;
cnt = 0;
while (1);
}
10.6.PCA輸出高速脈沖的示例程序(C程序和匯編程序)
1. C程序：
/*------------------------------------------------------------------------------------*/
/* --- STC MCU Limited ---------------- ---------------------------------------*/
/* --- 演示 STC 1T 系列單片機 PCA輸出高速脈沖 --------------------*/
/* --- Mobile: (86)13922809991 -----------------------------------------------*/
/* --- Fax: 86-755-82905966 ---------------------------------------------------*/
/* --- Tel: 86-755-82948412 ----------------------------------------------------*/
/* --- Web:-----------------------------------------------*/
/* 如果要在程序中使用或在文章中引用該程序， -------------------- ---*/
/* 請在程序中或文章中注明使用了STC的資料及程序 -----------*/
/*-------------------------------------------------------------------------------------*/
#include "reg51.h"
#include "intrins.h"
#define FOSC 18432000L
#define T100KHz (FOSC / 4 / 100000)
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;
sbit PCA_LED = P1^0; //PCA test LED
BYTE cnt;
WORD value;
void PCA_isr( ) interrupt 7 using 1
{
CCF0 = 0; //Clear interrupt flag
CCAP0L = value;
CCAP0H = value >> 8; //Update compare value
value += T100KHz;
}
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
value = T100KHz;
CCAP0L = value; //P1.3 output 100KHz square wave
CCAP0H = value >> 8; //Initial PCA module-0
value += T100KHz;
CCAPM0 = 0x4d; //PCA module-0 work in 16-bit timer mode
//and enable PCA interrupt, toggle the output pin CCP0(P1.3)
CR = 1; //PCA timer start run
EA = 1;
cnt = 0;
while (1);
}
10.7.PCA輸出PWM的示例程序(C程序和匯編程序)
1. C程序：
/*------------------------------------------------------------------------------------*/
/* --- STC MCU Limited ---------------- ---------------------------------------*/
/* --- 演示 STC 1T 系列單片機 PCA輸出PWM -------------------------*/
/* --- Mobile: (86)13922809991 -----------------------------------------------*/
/* --- Fax: 86-755-82905966 ---------------------------------------------------*/
/* --- Tel: 86-755-82948412 ----------------------------------------------------*/
/* --- Web: www.STCMCU.com -----------------------------------------------*/
/* 如果要在程序中使用或在文章中引用該程序， -------------------- ---*/
/* 請在程序中或文章中注明使用了STC的資料及程序 -----------*/
/*-------------------------------------------------------------------------------------*/
#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
while (1);
}
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