我刚做调试,可以调用PCA_Init (占空比值)来设置占空比做调速, 设置6位模式是100%做63级细分,设置7位模式是100%做127级细分,设置8位模式是100%做254级细分,足够使用了.
#include <15W204S.h>
//#include "intrins.h"
#define CCP_S0 0x10 //P_SW1.4
#define CCP_S1 0x20 //P_SW1.5
void PWM_Inte()
{
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;
// 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;
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 = 0x0000; //设置PCA时钟源
}
void PCA_Init (uint osc)
{
//禁止PCA定时器溢出中断
//PCA_PWM0 =0x80; //PCA模块0工作于8位PWM
//CCAP0H = CCAP0L = osc; //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 = osc; //PWM1的占空比为75% ((80H-20H)/80H)
CCAPM1 = 0x42; //PCA模块1为7位PWM模式
PCA_PWM2 = 0x20; //PCA模块2工作于6位PWM
CCAP2H = CCAP2L = osc; //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
}
void PCA_off (void)
{
//CR = 0;
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
} |
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