2022年svpwm源程序 .pdf
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1、/ TI File $Revision: /main/8 $/ Checkin $Date: April 21, 2008 15:41:53 $/#/ FILE: Example_2833xEPwmUpDownAQ.c/ TITLE: 空间电压矢量产生程序SVPWM/ ASSUMPTIONS:/ This program requires the DSP2833x header files. / Monitor ePWM1-ePWM3 pins on an oscilloscope as described/ below./ EPWM1A is on GPIO0-5脚/ EPWM1B is o
2、n GPIO1-6脚/ EPWM2A is on GPIO2-7脚/ EPWM2B is on GPIO3-10脚/ EPWM3A is on GPIO4-11脚/ EPWM3B is on GPIO5-12脚/#/ $TI Release: DSP2833x/DSP2823x Header Files V1.20 $/ $Release Date: August 1, 2008 $/#includeDSP28x_Project.h/ Device Headerfile and Examples Include File/ Prototype statements for functions
3、found within this file.voidInitEPwm1Example( void ); voidInitEPwm2Example( void ); voidInitEPwm3Example( void ); voidsvpwmGen( void ); interruptvoidsvpwm_isr( void ); volatilefloat Ualpha,Ubeta; volatilefloat A,B,C; 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - -
4、 - 第 1 页,共 11 页 - - - - - - - - - volatilefloat T0,T1,T2,T3,T4,T5,T6; volatilefloat Taon,Tbon,Tcon; float Ua,Ub,Uc; float Ts; int a,b,c; int N= 0,sector= 0; #define TPRD 800 #define Udc 800 voidmain ( void ) / Step 1. Initialize System Control:/ PLL, WatchDog, enable Peripheral Clocks/ This example
5、function is found in the DSP2833x_SysCtrl.c file. InitSysCtrl(); / Step 2. Initalize GPIO: / This example function is found in the DSP2833x_Gpio.c file and/ illustrates how to set the GPIO to its default state./ InitGpio(); / Skipped for this example / For this case just init GPIO pins for ePWM1, eP
6、WM2, ePWM3/ These functions are in the DSP2833x_EPwm.c file InitEPwm1Gpio(); InitEPwm2Gpio(); InitEPwm3Gpio(); / Step 3. Clear all interrupts and initialize PIE vector table:/ Disable CPU interrupts DINT; / Initialize the PIE control registers to their default state./ The default state is all PIE in
7、terrupts disabled and flags/ are cleared. / This function is found in the DSP2833x_PieCtrl.c file. InitPieCtrl(); / Disable CPU interrupts and clear all CPU interrupt flags: IER = 0 x0000; 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 2 页,共 11 页 - - - - - -
8、 - - - IFR = 0 x0000; / Initialize the PIE vector table with pointers to the shell Interrupt / Service Routines (ISR). / This will populate the entire table, even if the interrupt/ is not used in this example. This is useful for debug purposes./ The shell ISR routines are found in DSP2833x_DefaultIs
9、r.c./ This function is found in DSP2833x_PieVect.c. InitPieVectTable(); / Interrupts that are used in this example are re-mapped to/ ISR functions found within this file. EALLOW; / This is needed to write to EALLOW protected registers PieVectTable.EPWM1_INT = &svpwm_isr; /PieVectTable.EPWM2_INT = &e
10、pwm2_isr;/PieVectTable.EPWM3_INT = &epwm3_isr; EDIS; / This is needed to disable write to EALLOW protected registers/ Step 4. Initialize all the Device Peripherals:/ This function is found in DSP2833x_InitPeripherals.c/ InitPeripherals(); / Not required for this example/ For this example, only initi
11、alize the ePWM EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0; EDIS; InitEPwm1Example(); InitEPwm2Example(); InitEPwm3Example(); EALLOW; SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1; EDIS; / Step 5. User specific code, enable interrupts:/ Enable CPU INT3 which is connected to EPWM1-3 INT: IER |= M_INT3; / E
12、nable EPWM INTn in the PIE: Group 3 interrupt 1-3 PieCtrlRegs.PIEIER3.bit.INTx1 = 1; 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 3 页,共 11 页 - - - - - - - - - /PieCtrlRegs.PIEIER3.bit.INTx2 = 1;/PieCtrlRegs.PIEIER3.bit.INTx3 = 1;/ Enable global Interrupts
13、and higher priority real-time debug events: EINT; / Enable Global interrupt INTM ERTM; / Enable Global realtime interrupt DBGM / Step 6. IDLE loop. Just sit and loop forever (optional):for (;) asm( NOP); /main结束/=interruptvoidsvpwm_isr( void ) svpwmGen(); / Set Compare valuesEPwm1Regs.CMPA.half.CMPA
14、 = Taon; / adjust duty for output EPWM1AEPwm2Regs.CMPA.half.CMPA = Tbon; / adjust duty for output EPWM2AEPwm3Regs.CMPA.half.CMPA = Tcon; / adjust duty for output EPWM3A/ Clear INT flag for this timerEPwm1Regs.ETCLR.bit.INT = 1; / Acknowledge this interrupt to receive more interrupts from group 3PieC
15、trlRegs.PIEACK.all = PIEACK_GROUP3; voidInitEPwm1Example() 名师归纳总结 精品学习资料 - - - - - - - - - - - - - - -精心整理归纳 精选学习资料 - - - - - - - - - - - - - - - 第 4 页,共 11 页 - - - - - - - - - / Setup TBCLKEPwm1Regs.TBPRD = TPRD; / TPRD=800,Period = 1600 TBCLK countsEPwm1Regs.TBPHS.half.TBPHS = 0; / Set Phase regis
16、ter to zeroEPwm1Regs.TBCTR = 0 x0000; / Clear counter/ Setup counter modeEPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;/ Symmetrical modeEPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; /Master moduleEPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW; EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; / Sync down-stream module/
17、 Setup TpwmEPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV2; / Clock ratio to SYSCLKOUTEPwm1Regs.TBCTL.bit.CLKDIV = 5; / 原为 TB_DIV1 , 对于上下计数:Tpwm = 2 x TBPRD x TTBCLK Fpwm = 1 / (Tpwm)/Setup shadowingEPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW; EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW; EPwm1Regs.CMPCTL.bit.
18、LOADAMODE = CC_CTR_ZERO; / load on CTR=ZeroEPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; / load on CTR=Zero/ Set actionsEPwm1Regs.AQCTLA.bit.CAU = AQ_SET; / set actions for EPWM1AEPwm1Regs.AQCTLA.bit.CAD = AQ_CLEAR; / Set Dead-bandEPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE; / enable Dead-band mod
19、uleEPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC; / Active Hi complementaryEPwm1Regs.DBFED = 50; / FED = 50 TBCLKsEPwm1Regs.DBRED = 50; / RED = 50 TBCLKs/ Interrupt where we will change the Compare ValuesEPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; / Select INT on Zero eventEPwm1Regs.ETSEL.bit.INTEN = 1; /
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