从 STC-ISP V6.91j 版本的ISP烧录/辅助开发工具包一体化软件的 //范例程序/ /下载STC8-系列-PWM实现渐变色（呼吸灯）的范例：
STC8G2K64S4-36I-LQFP48, 45路增强型15位PWM, 再加3路传统 PWM/CCP/PCA
#include "reg51.h"
#include "intrins.h"
#define CYCLE 0x1000
sfr P_SW2 = 0xba;
sfr PWMSET = 0xF1;
sfr PWMCFG01 = 0xF6;
sfr PWMCFG23 = 0xF7;
sfr PWMCFG45 = 0xFE;
#define PWM0C (*(unsigned int volatile xdata *)0xFF00)
#define PWM0CH (*(unsigned char volatile xdata *)0xFF00)
#define PWM0CL (*(unsigned char volatile xdata *)0xFF01)
#define PWM0CKS (*(unsigned char volatile xdata *)0xFF02)
#define PWM0TADC (*(unsigned int volatile xdata *)0xFF03)
#define PWM0TADCH (*(unsigned char volatile xdata *)0xFF03)
#define PWM0TADCL (*(unsigned char volatile xdata *)0xFF04)
#define PWM0IF (*(unsigned char volatile xdata *)0xFF05)
#define PWM0FDCR (*(unsigned char volatile xdata *)0xFF06)
#define PWM00T1 (*(unsigned int volatile xdata *)0xFF10)
#define PWM00T1H (*(unsigned char volatile xdata *)0xFF10)
#define PWM00T1L (*(unsigned char volatile xdata *)0xFF11)
#define PWM00T2H (*(unsigned char volatile xdata *)0xFF12)
#define PWM00T2 (*(unsigned int volatile xdata *)0xFF12)
#define PWM00T2L (*(unsigned char volatile xdata *)0xFF13)
#define PWM00CR (*(unsigned char volatile xdata *)0xFF14)
#define PWM00HLD (*(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 PWM0_Isr() interrupt 22
{
static bit dir = 1;
static int val = 0;
if (PWMCFG01 & 0x08)
{
PWMCFG01 &= ~0x08; //清中断标志
if (dir)
{
val++;
if (val >= CYCLE) dir = 0;
}
else
{
val--;
if (val <= 1) dir = 1;
}
_push_(P_SW2);
P_SW2 |= 0x80;
PWM00T2 = val;
_pop_(P_SW2);
}
}
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;
PWMSET = 0x01; //使能PWM0模块（必须先使能模块后面的设置才有效）
P_SW2 = 0x80;
PWM0CKS = 0x00; // PWM0时钟为系统时钟
PWM0C = CYCLE; //设置PWM0周期
PWM00T1= 0x0000;
PWM00T2= 0x0001;
PWM00CR= 0x80; //使能PWM00输出
P_SW2 = 0x00;
PWMCFG01 = 0x05; //启动PWM0模块并使能PWM0中断
EA = 1;
while (1);
}
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