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標題: 請問一下，為什么我開啟PWM1H、L和PWM2H、L,然后PWM3不能當普通IO使用... [打印本頁]

作者: 大力做大力愛 時間: 2019-12-12 14:43
標題: 請問一下，為什么我開啟PWM1H、L和PWM2H、L,然后PWM3不能當普通IO使用...
我用的單片機是PIC33EP64GS502,然后我PWM1 和PWM2 也就是我的RA3、RA4、RB13、RB14都復用成PWM功能了，但是我PWM3的端口，也就是RB12、11我接的是按鍵，不開啟PWM的時候，按鍵可以正常，開啟PWM以后，按鍵就失效了，一直被拉低，請問這是PIC單片機的通性嗎，還是說我配置的不對？附上我的代碼

PWM函數(shù)

[code]//互補PWM初始化，
void PWM_driver_init( void )
{
//PWM1 INIT
//解鎖FCLCON 和 IOCON寄存器
asm volatile ("mov #0xabcd,w10");
asm volatile ("mov #0x4321,w11");
asm volatile ("mov #0x0003,w0");//禁止故障輸入
asm volatile ("mov w10, PWMKEY");
asm volatile ("mov w11, PWMKEY");
asm volatile ("mov w0,FCLCON1");
asm volatile ("mov #0xabcd,w10");
asm volatile ("mov #0x4321,w11");
asm volatile ("mov #0xC000,w0");//互補模式，pwm模塊控制pwm
asm volatile ("mov w10, PWMKEY");
asm volatile ("mov w11, PWMKEY");
asm volatile ("mov w0,IOCON1");
ACLKCONbits.FRCSEL = 1; /* FRC is input to Auxiliary PLL */
ACLKCONbits.SELACLK = 1; /* Auxiliary Oscillator provides the clock source*/
ACLKCONbits.APSTSCLR = 7; /* Divide Auxiliary clock by 1 */
ACLKCONbits.ENAPLL = 1; /* Enable Auxiliary PLL */
while(ACLKCONbits.APLLCK != 1); /* Wait for Auxiliary PLL to Lock */
PTPER = 3205; //周期
DTR1 = 50; //死區(qū)
ALTDTR1 = 50; //死區(qū)

TRGCON1bits.TRGDIV  = 2;       // Trigger interrupt generated every 2 PWM cycles
TRGCON1bits.TRGSTRT = 0;       // Trigger generated after waiting 0 PWM cycles

LEBCON1bits.PHR    = 1;

PDC1 = 1500; //占空比
TRIG1 = 1300;                   // Set Initial Trigger location

//PWM2 INIT
//解鎖FCLCON 和 IOCON寄存器
asm volatile ("mov #0xabcd,w10");
asm volatile ("mov #0x4321,w11");
asm volatile ("mov #0x0003,w0");//禁止故障輸入
asm volatile ("mov w10, PWMKEY");
asm volatile ("mov w11, PWMKEY");
asm volatile ("mov w0,FCLCON2");
asm volatile ("mov #0xabcd,w10");
asm volatile ("mov #0x4321,w11");
asm volatile ("mov #0xC000,w0");//互補模式，pwm模塊控制pwm
asm volatile ("mov w10, PWMKEY");
asm volatile ("mov w11, PWMKEY");
asm volatile ("mov w0,IOCON2");
DTR2 = 70; //死區(qū)
ALTDTR2 = 40; //死區(qū)

TRGCON2bits.TRGDIV = 2;
TRGCON2bits.TRGSTRT = 0;

LEBCON2bits.PHR    = 1;

PDC2 = 410; //占空比
TRIG2 = 0;                   // Set Initial Trigger location

PTCONbits.PTEN = 1;

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