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pic18f4431pwm中心對齊模式
#1
新會員
新會員


查看用戶資訊
請問各位大大
有沒有用過PIC18F4431內建的PWM中心對齊模式
我使用的是UP/DOWN COUNTING MODE要產生66US的PTIF中斷
可是無論怎麼設定我的中斷時間大概都為220US
我的程式如下:
#define FCY 2500000
#define FPWM 15000
CAPWM_PTPER=(FCY/FPWM-1)>>1;
Int2Byte.Word = CAPWM_PTPER ;
PTPERL = Int2Byte.Byte[0];
PTPERH = Int2Byte.Byte[1];
PTCON0 = 0b00000110 ;
PTCON1 = 0b10000000 ;
PWMCON0 = 0b01010000 ;
PWMCON1 = 0b00000001 ;

請各位前輩幫幫忙吧
我要的需求是66US中斷一次阿


發表於: 2007/5/28 10:46
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