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Re: 请教 Edward--关于33F的电流复位问题
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新會員
 
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另：
RP7引脚我也设置成输出状态了
發表於: 2009/10/8 12:42
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请教 Edward--关于33F的电流复位问题
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新會員
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Edward您好
我现在想使用DSPIC33F的电流复位模式，我看过你前面对一位网友的回复，也照着你的提示重新检查了寄存器的设置，但是比较器还是不能如愿的反转，我不知道问题出在什么地方 我的意图是当CMP4收到一个低于1.65V的脉冲时，触发复位PWM1时基。开始我也是让比较器的输出连接到RP7上，但是我观察到RP7却始终是低电平，并没有发生反转，以下是我的程序设置： CMPCON4bits.INSEL = 0; /* Comparator4A is selected for current limit */ CMPCON4bits.EXTREF = 0; /* Internal reference source provide reference to DAC */ CMPCON4bits.CMPPOL = 0; /* Output is not inverter */ CMPCON4bits.RANGE = 1; /* Vdd/2 is selected DAC reference */ CMPDAC4 = 1023; // CMPCON4bits.CMPON=1; //---------------------------------------- __builtin_write_OSCCONL(OSCCON & ~(1<<6)); //RPINR29bits.FLT1R = 32; // //RPOR16bits.RP32R = 34; // RPOR3bits.RP7R = 34; __builtin_write_OSCCONL(OSCCON | (1<<6)); //---------------------------------------- //PWMCON1bits.XPRES = 0; // //FCLCON1bits.CLSRC = 0; // //FCLCON1bits.CLPOL = 1; // //FCLCON1bits.CLMOD = 0; // //FCLCON1bits.FLTMOD = 3; // LEBCON1bits.PHR = 0; // LEBCON1bits.PHF = 1; // LEBCON1bits.CLLEBEN = 1; // LEBCON1bits.LEB = 12; // //---------------------------------------- PMD1bits.PWMMD=0; PMD1bits.ADCMD=0; PMD3bits.CMPMD=0;
發表於: 2009/10/8 12:40
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