刚接触这款芯片,靠着生啃英文手册写出的IC输出捕捉的程序,看了很久也不知道哪里出了问题,请各位指导
#include <stdio.h>
#include <stdlib.h>
#include<p33FJ64MC506.h>
#define BIT7 0x0080
#define IGBTEN_ON PORTD=LATD&(~BIT7)
//配置文件
_FOSCSEL(FNOSC_FRC) //初始振荡器源选择:000=FRC振荡器
_FOSC(FCKSM_CSECMD & OSCIOFNC_ON) //时钟切换模式:01=使能时钟切换,禁止故障保护时钟监视器
//OSC2引脚功能位(XT和HS模式除外):0=OSC2为通用数字I/O引脚
_FWDT(FWDTEN_OFF) //看门狗定时器使能:0=通过用户软件使能/ 禁止看门狗定时器
_FPOR(FPWRT_PWR128) //上电复位定时器值选择位:111=PWRT=128ms
_FICD(ICS_PGD1 & JTAGEN_OFF) //ICD通信通道选择使能位:11=在PGEC1和PGED1上进行通信
//JTAG使能位:0=禁止JTAG
void delay_us(int n)
{
int j;
while(n--)
for(j=0;j<10;j++);
}
void delay_ms(int n)
{
while(n--)
delay_us(1000);
}
void init_PWM(void);
void pwm1_init();
int Input_caputre(void)
{
IC1CONbits.ICM = 0b00;
IC1CONbits.ICTMR = 1; //Select Timer2 as the IC1 Time base
IC1CONbits.ICI = 0b01; // Interrupt on every fourth capture event
IC1CONbits.ICM = 0b011; //Capture mode, every 4th rising edge
IPC0bits.IC1IP = 3; // Setup IC1 interrupt priority level
IFS0bits.IC1IF = 0; // Clear IC1 Interrupt Status Flag
IEC0bits.IC1IE = 1; // Enable IC1 interrupt
return 1;
}
int timer2_init()
{
T2CONbits.TON = 0; // 确保T2关闭,再进行初始化
T2CONbits.TCKPS = 0;
T2CONbits.T32 = 0;
T2CONbits.TCS = 0;
T2CONbits.TON = 1;
return 1;
}
/**************************************************************************************
* FunctionName : main()
* Description : 主函数
* EntryParameter : NO
* ReturnValue : N0
**************************************************************************************/
int main()
{
/******** Configure Oscillator to operate the device at 39.6288Mhz(MIPS)
Fosc= Fin*M/(N1*N2), Fcy=Fosc/2
//Fosc= 7.3728*(43)/(2*2)=79.2576Mhz for Fosc, Fcy = 40Mhz *********/
/* Configure PLL prescaler, PLL postscaler, PLL divisor */
PLLFBD=41; /* M=PLLFBD+2=43 */
CLKDIVbits.PLLPOST=0; /* N2=PLLPOST+2=2 */
CLKDIVbits.PLLPRE=0; /* N1=PLLPRE+2=2 */
__builtin_write_OSCCONH(0x01); /* 快速RC振荡器(FRC)→带PLL的快速RC振荡器(FRC) */
__builtin_write_OSCCONL(0x01); /* Enable Switch */
// Wait for Clock switch to occur
while(OSCCONbits.COSC != 0b001); /* Wait for new Oscillator to become FRC with PLL */
while(OSCCONbits.LOCK != 1); /* Wait for Pll to Lock */
AD1PCFGL=0xFFFF;
//PWM模块IO初始
PORTD = LATD | 0x2038;
PORTD = LATD & 0xFF7F;
TRISD &= 0xdf47; //IGBTEN初始为低,配置为输出引脚pwm6H、6L、7H、7L配置为输出引脚,初始高电平
//pwm1_init();
timer2_init();
Input_caputre();
TRISB = 0x0000;
pwm1_init();
while(1) /* Infinite Loop */
{
//delay_ms(100);
}
}
/**************************************************************************************
* FunctionName : init_PWM()
* Description : 初始化PWM设置
* EntryParameter : NO
* ReturnValue : N0
**************************************************************************************/
void init_PWM()
{
PTPER=47188; /* PTPER = ((1 / 20kHz) / 1.0596ns) = 47188, where 20kHz is the desired switching frequency and 1.0596ns is PWM resolution. */
PWM1CON1bits.PEN1H = 1; /* 1 = PWM模块控制PWM1H引脚 */
PWM1CON1bits.PEN1L = 0; /* 0 = GPIO模块控制PWM1L引脚 */
PWM1CON1bits.PMOD1 = 1; /* PWM I/O引脚对处于真正独立输出模式 */
PDC1 = 10874; /* Initial Duty cycle 40%(最终输出60%)*/
/*~~~~~~~~~~~~~~~~~~~~~~~ PWM7 Configuration ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
PWM1CON1bits.PEN2H = 1; /* PWM2H is controlled by PWM module */
PWM1CON1bits.PEN2L = 0; /* PWM2L is controlled by GPIO module */
PWM1CON1bits.PMOD2 = 1; /* Select Independent Output PWM mode */
PDC2 = 28313; /* Initial Duty cycle 60(最终输出40%)*/
PTCONbits.PTEN = 1; /* Enable the PWM Module */
}
void pwm1_init()
{
PTPER=47188;
PTCONbits.PTEN = 1; //PWM time base is on
PTCONbits.PTMOD = 0; // operates in a Free-Running mode
PTCONbits.PTCKPS = 0; // PWM time base input clock period is TCY (1:1 prescale)
PWMCON1bits.PMOD1 = 1; //PWM I/O pin pair is in the Independent PWM Output mode
PWMCON1bits.PEN1H = 1; //PWMxH pin is enabled for PWM output
PWMCON1bits.PEN1L = 1; //PWMxL pin is enabled for PWM output
PWMCON2bits.SEVOPS = 0; //PWM Special Event Trigger Output Postscale
PWMCON2bits.IUE = 1; // Updates to the active PDC registers are immediate
PDC1 = 20000;
}
void __attribute__((__interrupt__,no_auto_psv))_IC1Interrupt(void)
{
IFS0bits.IC1IF=0;
LATB=(PORTB ^ 0x01);
}
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