我用的单片机是PIC33EP64GS502,然后我PWM1 和PWM2 也就是我的RA3、RA4、RB13、RB14都复用成PWM功能了，但是我PWM3的端口，也就是RB12、11我接的是按键，不开启PWM的时候，按键可以正常，开启PWM以后，按键就失效了，一直被拉低，请问这是PIC单片机的通性吗，还是说我配置的不对？附上我的代码
[code]//互补PWM初始化，
void PWM_driver_init( void )
{
//PWM1 INIT
//解锁FCLCON 和 IOCON寄存器
asm volatile ("mov #0xabcd,w10");
asm volatile ("mov #0x4321,w11");
asm volatile ("mov #0x0003,w0");//禁止故障输入
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");//互补模式，pwm模块控制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; //死区
ALTDTR1 = 50; //死区
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
//解锁FCLCON 和 IOCON寄存器
asm volatile ("mov #0xabcd,w10");
asm volatile ("mov #0x4321,w11");
asm volatile ("mov #0x0003,w0");//禁止故障输入
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");//互补模式，pwm模块控制pwm
asm volatile ("mov w10, PWMKEY");
asm volatile ("mov w11, PWMKEY");
asm volatile ("mov w0,IOCON2");
DTR2 = 70; //死区
ALTDTR2 = 40; //死区
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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