PWM.zip_dsp 按键_tms320f28027_按键 pwm dsp_按键dsp

// 函数变量 Period 值和输出频率之间 关系表 // SYSCLKOUT = 60 MHz 40 MHz // -------------------------------------- // Period Frequency Frequency // 1000 60 kHz 40 kHz // 800 75 kHz 50 kHz // 600 100 kHz 67 kHz // 500 120 kHz 80 kHz // 250 240 kHz 160 kHz // 200 300 kHz 200 kHz // 100 600 kHz 400 kHz // 50 1.2 Mhz 800 kHz // 25 2.4 Mhz 1.6 MHz // 20 3.0 Mhz 2.0 MHz // 12 5.0 MHz 3.3 MHz // 10 6.0 MHz 4.0 MHz // 9 6.7 MHz 4.4 MHz // 8 7.5 MHz 5.0 MHz // 7 8.6 MHz 5.7 MHz // 6 10.0 MHz 6.6 MHz // 5 12.0 MHz 8.0 MHz /*************************************************************************************************** **Description ** 头文件 ***************************************************************************************************/ #include "DSP2802x_Device.h" // DSP2802x 头文件 #include "DSP2802x_Examples.h" // DSP2802x Examples Headerfile #include "DSP2802x_EPwm_defines.h" //--------------------------------------------------------------- #define KEY1 GpioDataRegs.GPBDAT.bit.GPIO33 #define KEY2 GpioDataRegs.GPBDAT.bit.GPIO32 void Scan_Key(void); //扫描键盘 void Manage_Key1(void); //按键1处理程序 void Manage_Key2(void); //按键2处理程序 void HRPWM4_Config(int); Uint16 i,j, DutyFine, n,update; unsigned int a=50; /*************************************************************************************************** **Function: ** main **Description: ** 主函数 **Input: ** Null **Output: ** Null **Others: ** Null ***************************************************************************************************/ Uint32 temp; void main(void) { InitSysCtrl(); InitSpiaGpio(); InitEPwm4Gpio(); DINT; update =1; DutyFine =0; EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; EDIS; HRPWM4_Config(2400); EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; EDIS; while (update ==1) { for(DutyFine =1; DutyFine <256 ;DutyFine ++) { EPwm4Regs.CMPA.half.CMPAHR = DutyFine << 8; for (i=0;i<10000;i++){} } if((KEY1==0)|(KEY2==0))//扫描是否按键按下 Scan_Key(); EPwm4Regs.CMPB=24*a; } } /*************************************************************************************************** **Function: ** HRPWM1_Config(period) **Description: ** 初始化HRPWM模块 **Input: ** period **Output: ** Null **Others: ** Null ***************************************************************************************************/ void HRPWM4_Config(period) { EPwm4Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE; EPwm4Regs.TBPRD = period-1; EPwm4Regs.CMPA.half.CMPA = period / 2; EPwm4Regs.CMPA.half.CMPAHR = (1 << 8); EPwm4Regs.CMPB = 0; EPwm4Regs.TBPHS.all = 0; EPwm4Regs.TBCTR = 0; EPwm4Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; EPwm4Regs.TBCTL.bit.PHSEN = TB_DISABLE; EPwm4Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE; EPwm4Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; EPwm4Regs.TBCTL.bit.CLKDIV = TB_DIV1; EPwm4Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; EPwm4Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; EPwm4Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW; EPwm4Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW; EPwm4Regs.AQCTLA.bit.ZRO = AQ_CLEAR; EPwm4Regs.AQCTLB.bit.ZRO = AQ_CLEAR; EPwm4Regs.AQCTLB.bit.CBU = AQ_SET; EALLOW; EPwm4Regs.HRCNFG.all = 0x0; EPwm4Regs.HRCNFG.bit.CTLMODE = HR_CMP; EPwm4Regs.HRCNFG.bit.HRLOAD = HR_CTR_ZERO; EDIS; } void Scan_Key(void) { unsigned int i; for(i=0;i<10000;i++); //键盘消抖动 if(KEY1==0) Manage_Key1(); else if(KEY2==0) Manage_Key2(); while((KEY1==0)|(KEY2==0)); } void Manage_Key1(void) { if(a==0) { a=0; } else a--; } void Manage_Key2(void) { if(a==100) { a=100; } else a++; }