我用pic16f1937做了一個直流電機控制，用的是AQMD2410NS電機驅動，如圖鏈接
當我給驅動器使能上高電平時，AI2口上低電平時電機并沒有正反轉，而是非常慢的裝，接近于靜止。我用RD0~RD2控制使能和AI2，部分程序如下：
void System_Init(void)
{
OSCCON = 0b01101000; //內部4MHz
OSCTUNE= 0b00000000; //出廠校準
ADCON1 = 0b10110000; //內部Frc Vref = VDD
ADCON0 = 0b00010001; //ADON = 1 As AN4
TRISA = 0b00100000; //RA0-RA3輸出、RA5輸入
ANSELA = 0b00100000; //RA5 模擬輸入
TRISB = 0b00000011; //RB0-RB3觸摸按鍵
ANSELB = 0b00000011; //4個觸摸按鍵
WPUB = 0b00000000; //無上拉
IOCBP = 0b00000000; //關電平變化中斷
IOCBN = 0b00000000;
TRISD = 0b00000000; //PORTD輸出
ANSELD = 0b00000000; //數字輸出I/O
//WPUE = 0b00001111;
TRISC = 0b10011000; //串口 I2C
TRISE = 0b00000000; //PORTE輸出
ANSELE = 0b00000000; //數字 I/O
WPUE = 0b00000000; //無上拉
LATA = 0x00;
LATB = 0x00;
LATC = 0x00;
LATD = 0x00;
LATE = 0x00;
PORTDbits.RD0=0;//使能初始化為0
PORTDbits.RD1=0;//轉速控制初始化為0
PORTDbits.RD2=0;//繼電器初始化為0
}
void Cap_ISR(void)
{
KEY_Avg[Index] = Cap_Value;
if (Cap_Value < (Cap_Avg[Index] - trip[Index])) //有鍵按下,不更新頻率平均值
{
switch(Index)
{
case 0: KEY1_FLAG = 1; LATA0 = 1;PORTDbits.RD0=1;PORTDbits.RD1=1;PORTDbits.RD2=1;break; //CSM 0 KEY1 //LATD=0x07;//__delay_ms(10);//
case 1: KEY2_FLAG = 1; LATA1 = 1;PORTDbits.RD0=1;PORTDbits.RD1=0;PORTDbits.RD2=1;break; //CSM 1 KEY2 //LATD=0x05;//__delay_ms(10);//
default : break;//RD0使能控制口，RD1正反向控制口，RD2繼電器控制口
}
}
else if (Cap_Value > (Cap_Avg[Index] - trip[Index] +64)) //無鍵按下,慢更新頻率平均值
{
switch(Index)
{
case 0: KEY1_FLAG = 0; LATA0 = 0;PORTDbits.RD0=0;PORTDbits.RD1=0;PORTDbits.RD2=0;break; //CSM 0 KEY1 PORTDbits.RD0=1;PORTDbits.RD1=1
case 1: KEY2_FLAG = 0; LATA1 = 0;PORTDbits.RD0=0;PORTDbits.RD1=0;PORTDbits.RD2=0;break; //CSM 1 KEY2 PORTDbits.RD0=1;PORTDbits.RD1=0
default : break;//D1正反向控制口，RD2繼電器控制口
}
if (AvgIndex < 2) AvgIndex ++; //更新頻率
else AvgIndex = 0;
if (AvgIndex == 2)
{
if(Cap_Value >= Cap_Avg[Index])
Cap_Avg[Index] = Cap_Avg[Index]+(Cap_Value - Cap_Avg[Index])/16;
else
Cap_Avg[Index] = Cap_Avg[Index]-(Cap_Avg[Index] - Cap_Value)/16;
}
}
}
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