STC micro STC8A8K64D4 Series - Example Routines; Output Waveforms with Arbitrary Period and Arbitrary Duty

STC8A8K64D4 Series Manual
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19.3 Example Routines
19.3.1 Output waveforms with arbitrary period and arbitrary duty
C language code
//Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
sfr P_SW2 = 0xba;
sfr PWMSET = 0xF1;
sfr PWMCFG1 = 0xF6;
#define PWMC (*(unsigned int volatile xdata *)0xFF00)
#define PWMCH (*(unsigned char volatile xdata *)0xFF00)
#define PWMCL (*(unsigned char volatile xdata *)0xFF01)
#define PWMCKS (*(unsigned char volatile xdata *)0xFF02)
#define PWMTADC (*(unsigned int volatile xdata *)0xFF03)
#define PWMTADCH (*(unsigned char volatile xdata *)0xFF03)
#define PWMTADCL (*(unsigned char volatile xdata *)0xFF04)
#define PWMIF (*(unsigned char volatile xdata *)0xFF05)
#define PWMFDCR (*(unsigned char volatile xdata *)0xFF06)
#define PWM0T1 (*(unsigned int volatile xdata *)0xFF10)
#define PWM0T1H (*(unsigned char volatile xdata *)0xFF10)
#define PWM0T1L (*(unsigned char volatile xdata *)0xFF11)
#define PWM0T2H (*(unsigned char volatile xdata *)0xFF12)
#define PWM0T2 (*(unsigned int volatile xdata *)0xFF12)
#define PWM0T2L (*(unsigned char volatile xdata *)0xFF13)
#define PWM0CR (*(unsigned char volatile xdata *)0xFF14)
#define PWM0HLD (*(unsigned char volatile xdata *)0xFF15)
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;
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;