PWM-CAP.rar_2812 cap_2812 pwm 中断_2812 捕获中断_CAP 2812_占空检测

初始化修改： EvbRegs.T3PR = 1874;//时钟周期15000完成100us计时 EvbRegs.T3CNT = 0x0000;//初始化计数值 EvbRegs.T3CMPR = 0x0000;//初始化比较值 EvbRegs.T3CON.all = 0x1242;//连续增计数模式,输入时钟为CPU时钟,使能定时器操作,立即装载比较操作 EvbRegs.GPTCONB.all = 0x0076;//使能GP定时器比较输出 EvbRegs.COMCONB.all = 0xCA00;//全比较器输出使能 EvbRegs.ACTRB.all = 0x0666;//比较输出极性 EvbRegs.DBTCONB.all = 0x0000;//死区设置不设置 //EvbRegs.CAPCONB.all = 0x0000;//重置cap寄存器 //EvbRegs.CAPFIFOB.all = 0x0000; //EvbRegs.CAPCONB.all = 0xB7FC;//使能CAP4，CAP5，选择GP定时器3，两个沿都检测 EvbRegs.EVBIFRA.all = 0x078F; EvbRegs.EVBIFRB.all = 0x0007; //EvbRegs.EVBIFRC.all = 0x0007; EvbRegs.EVBIMRA.all = 0x0082; EvbRegs.EVBIMRB.all = 0x0007; //EvbRegs.EVBIMRC.all = 0x0007; EvbRegs.EXTCONB.all = 0x0000; 变量定义： 1MS计数 标志位: UINT16 MSF; 捕获次数标志位：UINT16 F[2]; 捕获比较寄存器：UINT16 temp[2]; 冗余DSP 主程序中判断： if( MSF == 1 ) { if(f[0] == 0) { if(f[1] == 0) { temp[0] = EvbRegs.CAP4FIFO; f[1] = 1; } else { temp[1] = EvbRegs.CAP4FIFO; f[1] = 0; temp[2] = temp[1] - temp[0]; f[0] = 1; } } else { if(f[1] == 0) { temp[0] = EvbRegs.CAP4FIFO; f[1] = 1; } else { temp[1] = EvbRegs.CAP4FIFO; f[1] = 0; temp[3] = temp[1] - temp[0]; f[0] = 0; if(temp[2] == temp[3] |temp[2] -temp[3] == 1|temp[3] - temp[2] == 1) { ERR = 1; } else { ERR = 0; } } } } 主DSP 定时器中断中PWM修改和标志位判断： if( k < 10 ) { k ++; MSF = 0; } ELSE { k = 0; MSF = 1; } if(EvbRegs.CMPR4 < 1687) { EvbRegs.CMPR4 = EvbRegs.CMPR4 + 10; } else { EvbRegs.CMPR4 = 187; }