#include <reg52.h>
#include <intrins.h>
//#define FOSC 11059200L
#define FOSC 12000000L
#define T100Hz (FOSC / 12 / 100)
#define uchar unsigned char
#define uint unsigned int
sfr P5=0xC8;//xxxx,1111 端口5
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xC9;
sfr P5M0 = 0xCA;
sfr P6M1 = 0xCB;
sfr P6M0 = 0xCC;
sfr P7M1 = 0xE1;
sfr P7M0 = 0xE2;
sfr P_SW1=0xA2; //外設功能切換寄存器1
#define CCP_S0 0x10 //P_SW1.4
#define CCP_S1 0x20 //P_SW1.5
sfr CCON=0xD8; //PCA控制寄存器
sbit CCF0=CCON^0; //PCA模塊0中斷標志
sbit CCF1=CCON^1; //PCA模塊1中斷標志
sbit CR=CCON^6; //PCA定時器運行控制位
sbit CF=CCON^7; //PCA定時器溢出標志
sfr CMOD=0xD9; //PCA模式寄存器
sfr CL=0xE9; //PCA定時器低字節
sfr CH=0xF9; //PCA定時器高字節
sfr CCAPM0=0xDA; //PCA模塊0模式寄存器
sfr CCAP0L=0xEA; //PCA模塊0捕獲寄存器 LOW
sfr CCAP0H=0xFA; //PCA模塊0捕獲寄存器 HIGH
sfr CCAPM1=0xDB; //PCA模塊1模式寄存器
sfr CCAP1L=0xEB; //PCA模塊1捕獲寄存器 LOW
sfr CCAP1H=0xFB; //PCA模塊1捕獲寄存器 HIGH
sfr PCAPWM0=0xf2;
sfr PCAPWM1=0xf3;
sbit PCA_LED=P3^5; //PCA測試LED
sbit PCA_LED1=P1^1; //PCA測試LED
uint cnt;
uint value;
uchar num,datpwm;
sbit LED=P3^6;//LED輸出引腳
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
P6M0 = 0x00;
P6M1 = 0x00;
P7M0 = 0x00;
P7M1 = 0x00;
ACC = P_SW1;
ACC &= ~(CCP_S0 | CCP_S1);//CCP_S0=0 CCP_S1=0
P_SW1 = ACC;//(P1.2/ECI, P1.1/CCP0, P1.0/CCP1, P3.7/CCP2)
// ACC = P_SW1;
// ACC &= ~(CCP_S0 | CCP_S1);//CCP_S0=1 CCP_S1=0
// ACC |= CCP_S0;//(P3.4/ECI_2, P3.5/CCP0_2, P3.6/CCP1_2, P3.7/CCP2_2)
// P_SW1 = ACC;
//
// ACC = P_SW1;
// ACC &= ~(CCP_S0 | CCP_S1);//CCP_S0=0 CCP_S1=1
// ACC |= CCP_S1;//(P2.4/ECI_3, P2.5/CCP0_3, P2.6/CCP1_3, P2.7/CCP2_3)
// P_SW1 = ACC;
CCON = 0;//清除模塊中斷標志//初始化PCA控制寄存器//PCA定時器停止//清除CF標志
CL = 0;//復位PCA寄存器
CH = 0;
//CMOD = 0x00;//設置PCA時鐘源//禁止PCA定時器溢出中斷
value = T100Hz;
CCAP0L = value;
CCAP0H = value >> 8;//初始化PCA模塊0
value += T100Hz;
CCAPM0 = 0x49; //PCA模塊0為16位定時器模式
CR = 1;//PCA定時器開始工作
EA = 1;
cnt = 0;
while (1)
{
datpwm=1;//亮度可以從0-100之間變化 100是最亮的 0就是關掉
}
}
void PCA_isr() interrupt 7
{
CCF0=0;//清中斷標志
CCAP0L=value;
CCAP0H=value>>8;//更新比較值
value+=T100Hz/100;//原始值為10ms/100=0.1ms--變換后的值
if (cnt--==0)
{
cnt=10000;//記數100次
PCA_LED = !PCA_LED;//每秒閃爍一次
PCA_LED1= !PCA_LED1;
}
num++;
if(num>=100)
num=0;
if(num<datpwm)
LED=0;//如果計數器變量小于PWM時，LED亮
else
LED=1;
}
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