STC micro STC8A8K64D4 Series - PCA Capture and Measure Pulse Width

STC8A8K64D4 Series Manual
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SETB CR ;Start PCA timer
JMP $
END
18.5.2 PCA Capture and Measure Pulse Width
C language code
//Operating frequency for test is 11.0592MHz
#include “reg51.h”
#include “intrins.h”
sfr CCON = 0xd8;
sbit CF = CCON^7;
sbit CR = CCON^6;
sbit CCF2 = CCON^2;
sbit CCF1 = CCON^1;
sbit CCF0 = CCON^0;
sfr CMOD = 0xd9;
sfr CL = 0xe9;
sfr CH = 0xf9;
sfr CCAPM0 = 0xda;
sfr CCAP0L = 0xea;
sfr CCAP0H = 0xfa;
sfr PCA_PWM0 = 0xf2;
sfr CCAPM1 = 0xdb;
sfr CCAP1L = 0xeb;
sfr CCAP1H = 0xfb;
sfr PCA_PWM1 = 0xf3;
sfr CCAPM2 = 0xdc;
sfr CCAP2L = 0xec;
sfr CCAP2H = 0xfc;
sfr PCA_PWM2 = 0xf4;
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;
unsigned char cnt; //Store PCA timing overflow times
unsigned long count0; //Record the last captured value
unsigned long count1; //Record the current captured value
unsigned long length; //Store the time length of signal