求助：CCP/PWM 问题
芯片15W4K48S4 P2.6 输出可调PWM，系统时钟选择只能 是12分频修改后不工作。经过测试 CMOD =0X00,CMOD=0X01,都是12分频， 其他数值不工作
//本示例在Keil开发环境下请选择Intel的8058芯片型号进行编译
//若无特别说明,工作频率一般为11.0592MHz
#include "reg51.h"
#include "intrins.h"
#define FOSC 11059200L
typedef unsigned char BYTE;
typedef unsigned int WORD;
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; //外设功能切换寄存器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模块0中断标志
sbit CCF1 = CCON^1; //PCA模块1中断标志
sbit CR = CCON^6; //PCA定时器运行控制位
sbit CF = CCON^7; //PCA定时器溢出标志
sfr CMOD = 0xD9; //PCA模式寄存器
sfr CL = 0xE9; //PCA定时器低字节
sfr CH = 0xF9; //PCA定时器高字节
sfr CCAPM0 = 0xDA; //PCA模块0模式寄存器
sfr CCAP0L = 0xEA; //PCA模块0捕获寄存器 LOW
sfr CCAP0H = 0xFA; //PCA模块0捕获寄存器 HIGH
sfr CCAPM1 = 0xDB; //PCA模块1模式寄存器
sfr CCAP1L = 0xEB; //PCA模块1捕获寄存器 LOW
sfr CCAP1H = 0xFB; //PCA模块1捕获寄存器 HIGH
sfr CCAPM2 = 0xDC; //PCA模块2模式寄存器
sfr CCAP2L = 0xEC; //PCA模块2捕获寄存器 LOW
sfr CCAP2H = 0xFC; //PCA模块2捕获寄存器 HIGH
sfr PCA_PWM0 = 0xf2; //PCA模块0的PWM寄存器
sfr PCA_PWM1 = 0xf3; //PCA模块1的PWM寄存器
sfr PCA_PWM2 = 0xf4; //PCA模块2的PWM寄存器
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; //初始化PCA控制寄存器
//PCA定时器停止
//清除CF标志
//清除模块中断标志
CL = 0; //复位PCA寄存器
CH = 0;
CMOD = 0x02; //设置PCA时钟源
//禁止PCA定时器溢出中断
PCA_PWM0 = 0x00; //PCA模块0工作于8位PWM
CCAP0H = CCAP0L = 0x20; //PWM0的占空比为87.5% ((100H-20H)/100H)
CCAPM0 = 0x42; //PCA模块0为8位PWM模式
PCA_PWM1 = 0x40; //PCA模块1工作于7位PWM
CCAP1H = CCAP1L = 0x20; //PWM1的占空比为75% ((80H-20H)/80H)
CCAPM1 = 0x42; //PCA模块1为7位PWM模式
PCA_PWM2 = 0x80; //PCA模块2工作于6位PWM
CCAP2H = CCAP2L = 0x20; //PWM2的占空比为50% ((40H-20H)/40H)
CCAPM2 = 0x42; //PCA模块2为6位PWM模式
CR = 1; //PCA定时器开始工作
while (1);
}
https://www.stcaimcu.com/data/download/Datasheet/STC15H2K64S4.pdf
这部分，可参考 STC15H2K64S4 的说明
/************* 功能说明 **************
请先别修改程序，直接下载PCA-PWM.hex测试，下载时选择主频为24MHz。
STC15W4K60S4 2路10位PWM基本应用.
PWM0--P2.5输出10位PWM，频率为23437.5Hz.
PWM1--P2.6输出10位PWM，频率为23437.5Hz.
******************************************/
本例子使用1T时钟模式，用户可以修改下面的参数获得不同时钟：
CMOD= (CMOD& ~(7<<1)) | PCA_Clock_1T; //选择时钟源, PCA_Clock_1T, PCA_Clock_2T, PCA_Clock_4T, PCA_Clock_6T, PCA_Clock_8T, PCA_Clock_12T, PCA_Clock_Timer0_OF
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