STC micro STC8A8K64D4 Series - PWM Implements Gradient Light (Breathing Light)

STC8A8K64D4 Series Manual
- 556 -
MOV A,#00H
MOV DPTR,#PWM0T2L
MOVX @DPTR,A
MOV A,#00H
MOV DPTR,#PWM1T2H ;At the count value of 0080H, PWM1 outputs high level.
MOVX @DPTR,A
MOV A,#80H
MOV DPTR,#PWM1T2L
MOVX @DPTR,A
MOV A,#07H
MOV DPTR,#PWM1T1H ;At the count value of 0780H, PWM1 outputs low level.
MOVX @DPTR,A
MOV A,#80H
MOV DPTR,#PWM1T1L
MOVX @DPTR,A
MOV A,#080H
MOV DPTR,#PWM0CR ;enable PWM0 output
MOVX @DPTR,A
MOV A,#80H
MOV DPTR,#PWM1CR ;enable PWM1 output
MOVX @DPTR,A
MOV P_SW2,#00H
MOV PWMCFG,#01H ;Start PWM module
JMP $
END
19.3.3 PWM Implements Gradient Light (Breathing Light)
C language code
//Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
#define CYCLE 0x1000
sfr P_SW2 = 0xba;
sfr PWMSET = 0xF1;
sfr PWMCFG = 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)