STC15W4K60S4单片机2路10位PWM基本应用程序 -

/************* 功能说明 **************
STC15W4K60S4 2路10位PWM基本应用.
PWM0 为10位PWM.
PWM1 为10位PWM.
******************************************/
#define MAIN_Fosc 24000000L //定义主时钟
#include "STC15Fxxxx.H"
#define PCA0 0
#define PCA1 1
#define PCA_Counter 3
#define PCA_P12_P11_P10 (0<<4)
#define PCA_P34_P35_P36 (1<<4)
#define PCA_P24_P25_P26 (2<<4)
#define PCA_Mode_PWM 0x42 //B0100_0010
#define PCA_Mode_Capture 0
#define PCA_Mode_SoftTimer 0x48 //B0100_1000
#define PCA_Mode_HighPulseOutput 0x4c //B0100_1100
#define PCA_Clock_1T (4<<1)
#define PCA_Clock_2T (1<<1)
#define PCA_Clock_4T (5<<1)
#define PCA_Clock_6T (6<<1)
#define PCA_Clock_8T (7<<1)
#define PCA_Clock_12T (0<<1)
#define PCA_Clock_Timer0_OF (2<<1)
#define PCA_Clock_ECI (3<<1)
#define PCA_Rise_Active (1<<5)
#define PCA_Fall_Active (1<<4)
#define PCA_PWM_8bit (0<<6)
#define PCA_PWM_7bit (1<<6)
#define PCA_PWM_6bit (2<<6)
#define PCA_PWM_10bit (3<<6)
void PCA_config(void);
void UpdatePwm(u8 PCA_id, u16 pwm_value);
/************************************************/
/**********************************************/
void main(void)
{
PCA_config();
// EA = 1;
UpdatePwm(PCA0,800);
UpdatePwm(PCA1,400);
while (1)
{
}
}
//========================================================================
// 函数: void PCA_config(void)
// 描述: PCA初始化函数。
// 参数: none.
// 返回: none.
// 版本: VER1.0
// 日期: 2014-12-15
// 备注:
//========================================================================
void PCA_config(void)
{
CR = 0;
CH = 0;
CL = 0;
// AUXR1 = (AUXR1 & ~(3<<4)) | PCA_P12_P11_P10; P1n_standard(0x07); //切换到P1.2 P1.1 P1.0 (ECI CCP0 CCP1)
// AUXR1 = (AUXR1 & ~(3<<4)) | PCA_P24_P25_P26; P2n_standard(0x70); //切换到P2.4 P2.5 P2.6 (ECI CCP0 CCP1)
AUXR1 = (AUXR1 & ~(3<<4)) | PCA_P34_P35_P36; P3n_standard(0x70); //切换到P3.4 P3.5 P3.6 (ECI CCP0 CCP1)
CMOD = (CMOD & ~(7<<1)) | PCA_Clock_1T; //选择时钟源
CMOD &= ~1; //禁止溢出中断
// PPCA = 1; //高优先级中断
CCAPM0 = PCA_Mode_PWM; //工作模式
PCA_PWM0 = (PCA_PWM0 & ~(3<<6)) | PCA_PWM_10bit; //PWM宽度
CCAP0L = 0xff;
CCAP0H = 0xff;
CCAPM1 = PCA_Mode_PWM; //工作模式
PCA_PWM1 = (PCA_PWM1 & ~(3<<6)) | PCA_PWM_10bit; //PWM宽度
CCAP1L = 0xff;
CCAP1H = 0xff;
CR = 1;
}
//========================================================================
// 函数: UpdatePwm(u8 PCA_id, u16 pwm_value)
// 描述: 更新PWM值.
// 参数: PCA_id: PCA序号. 取值 PCA0,PCA1
// pwm_value: pwm值, 0~1024, 这个值是输出高电平的时间, 0对应连续的低电平, 1024对应连续的高电平.
// 返回: none.
// 版本: V1.0, 2012-11-22
//========================================================================
void UpdatePwm(u8 PCA_id, u16 pwm_value)
{
if(pwm_value > 1024) return; //PWM值过大, 退出
if(PCA_id == PCA0)
{
if(pwm_value == 0)
{
PCA_PWM0 |= 0x32;
CCAP0H = 0xff;
}
else
{
pwm_value = ~(pwm_value-1) & 0x3ff;
PCA_PWM0 = (PCA_PWM0 & ~0x32) | ((u8)(pwm_value >> 4) & 0x30);
CCAP0H = (u8)pwm_value;
}
}
else if(PCA_id == PCA1)
{
if(pwm_value == 0)
{
PCA_PWM1 |= 0x32;
CCAP1H = 0xff;
}
else
{
pwm_value = ~(pwm_value-1) & 0x3ff;
PCA_PWM1 = (PCA_PWM1 & ~0x32) | ((u8)(pwm_value >> 4) & 0x30);
CCAP1H = (u8)pwm_value;
}
}
}

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