本帖最后由 SingleYork2021 于 2021-11-17 15:02 编辑
想用HC32F460KETA TIMER6输出三路PWM，使用到的是TIMER6_1_PWMB、TIMER6_2_PWMB、TIMER6_3_PWMB，其中部分配置代码如下：
- /*---------------------------------------------------*/
-
- stcTIM6BaseCntCfg.enCntMode = Timer6CntTriangularModeA; //Triangular wave mode
- stcTIM6BaseCntCfg.enCntDir = Timer6CntDirUp; //Counter counting up
- stcTIM6BaseCntCfg.enCntClkDiv = Timer6PclkDiv1; //Count clock: pclk 168M
- Timer6_Init(M4_TMR61, &stcTIM6BaseCntCfg); //timer6 PWM frequency, count mode and clk config
- u16Period_1 = u32Pclk0/(TIMER6_PWM1B_Out_Fre*2);
- Timer6_SetPeriod(M4_TMR61, Timer6PeriodA, u16Period_1); //period set
- u16Compare_1 = u16Period_1/2; //50%占空比
- // Timer6_SetGeneralCmpValue(M4_TMR61, Timer6GenCompareA, u16Compare_1); //Set General Compare RegisterA Value
- Timer6_SetGeneralCmpValue(M4_TMR61, Timer6GenCompareC, u16Compare_1); //Set General Compare RegisterC Value as buffer register of GCMAR
-
- /*PWMA/PWMB output buf config*/
- stcGCMPBufCfg.bEnGcmpTransBuf = true;
- stcGCMPBufCfg.enGcmpBufTransType = Timer6GcmpPrdSingleBuf; //Single buffer transfer
- Timer6_SetGeneralBuf(M4_TMR61, Timer6PWMA, &stcGCMPBufCfg); //GCMAR buffer transfer set
- Timer6_SetGeneralBuf(M4_TMR61, Timer6PWMB, &stcGCMPBufCfg); //GCMBR buffer transfer set
-
- // stcTIM6PWMxCfg.bOutEn = true; //Output enable
- // stcTIM6PWMxCfg.enPerc = Timer6PWMxCompareKeep; //PWMA port output keep former level when CNTER value match PERAR
- // stcTIM6PWMxCfg.enCmpc = Timer6PWMxCompareInv; //PWMA port output inverse level when CNTER value match with GCMAR
- // stcTIM6PWMxCfg.enStaStp = Timer6PWMxStateSelSS; //PWMA output status is decide by STACA STPCA when CNTER start and stop
- // stcTIM6PWMxCfg.enStaOut = Timer6PWMxPortOutLow; //PWMA port output set low level when CNTER start
- // stcTIM6PWMxCfg.enStpOut = Timer6PWMxPortOutLow; //PWMA port output set low level when CNTER stop
- // stcTIM6PWMxCfg.enDisVal = Timer6PWMxDisValLow;
- // Timer6_PortOutputConfig(M4_TMR61, Timer6PWMA, &stcTIM6PWMxCfg);
- // Timer6_SetFunc(M4_TMR61, Timer6PWMA, Timer6ModeCompareOutput); //Compare output function
- stcTIM6PWMxCfg.bOutEn = true; //Output enable
- stcTIM6PWMxCfg.enPerc = Timer6PWMxCompareKeep; //PWMB port output keep former level when CNTER value match PERAR
- stcTIM6PWMxCfg.enCmpc = Timer6PWMxCompareInv; //PWMB port output inverse level when CNTER value match with GCMBR
- stcTIM6PWMxCfg.enStaStp = Timer6PWMxStateSelSS; //PWMB output status is decide by STACB STPCB when CNTER start and stop
- stcTIM6PWMxCfg.enStaOut = Timer6PWMxPortOutHigh; //PWMB port output set high level when CNTER start
- stcTIM6PWMxCfg.enStpOut = Timer6PWMxPortOutLow; //PWMB port output set low level when CNTER stop
- stcTIM6PWMxCfg.enDisVal = Timer6PWMxDisValLow;
- Timer6_PortOutputConfig(M4_TMR61, Timer6PWMB, &stcTIM6PWMxCfg);
- Timer6_SetFunc(M4_TMR61, Timer6PWMB, Timer6ModeCompareOutput); //Compare output function
- Timer6_SetDeadTimeValue(M4_TMR61, Timer6DeadTimUpAR, 0u); //Set dead time value (up count)
- stcDeadTimeCfg.bEnDeadtime = true; //Enable Hardware DeadTime
- stcDeadTimeCfg.bEnDtBufUp = false; //Disable buffer transfer
- stcDeadTimeCfg.bEnDtBufDwn = false; //Disable buffer transfer
- stcDeadTimeCfg.bEnDtEqualUpDwn = true; //Make the down count dead time value equal to the up count dead time setting
- Timer6_ConfigDeadTime(M4_TMR61, &stcDeadTimeCfg); //Hardware dead time function config
-
- /*config interrupt*/
- /* Enable timer61 under flow interrupt */
- Timer6_ConfigIrq(M4_TMR61, Timer6INTENUDF, true);
- stcIrqRegiConf.enIRQn = Int018_IRQn; //Register INT_TMR62_GUDF Int to Vect.No.019
- stcIrqRegiConf.enIntSrc = INT_TMR61_GUDF; //Select Event interrupt function
- stcIrqRegiConf.pfnCallback = &Timer61_UnderFlow_CallBack; //Callback function
- enIrqRegistration(&stcIrqRegiConf); //Registration IRQ
- NVIC_ClearPendingIRQ(stcIrqRegiConf.enIRQn); //Clear Pending
- NVIC_SetPriority(stcIrqRegiConf.enIRQn, DDL_IRQ_PRIORITY_03); //Set priority
- NVIC_EnableIRQ(stcIrqRegiConf.enIRQn); //Enable NVIC
1、Timer6_SetPeriod(M4_TMR61, Timer6PeriodA, u16Period_1); 这里为什么要设置Timer6PeriodA，看到库配置里面还有Timer6PeriodB和Timer6PeriodC可选，这里有什么特别含义吗？手册上实在没看懂！
2、下面这两个配置：
Timer6_SetGeneralBuf(M4_TMR61, Timer6PWMA, &stcGCMPBufCfg); //GCMAR buffer transfer set
Timer6_SetGeneralBuf(M4_TMR61, Timer6PWMB, &stcGCMPBufCfg); //GCMBR buffer transfer set
如果我只是使用PWMB的话，第一句“Timer6_SetGeneralBuf(M4_TMR61, Timer6PWMA, &stcGCMPBufCfg); ”是否可以去掉？我试过直接去掉，但是输出PWM就有问题了，跟我配置的不一样，是不是还需要修改其他地方？我试了屏蔽下面这部分代码，对PWMB输出没有影响：
- stcTIM6PWMxCfg.bOutEn = true; //Output enable
- stcTIM6PWMxCfg.enPerc = Timer6PWMxCompareKeep; //PWMA port output keep former level when CNTER value match PERAR
- stcTIM6PWMxCfg.enCmpc = Timer6PWMxCompareInv; //PWMA port output inverse level when CNTER value match with GCMAR
- stcTIM6PWMxCfg.enStaStp = Timer6PWMxStateSelSS; //PWMA output status is decide by STACA STPCA when CNTER start and stop
- stcTIM6PWMxCfg.enStaOut = Timer6PWMxPortOutLow; //PWMA port output set low level when CNTER start
- stcTIM6PWMxCfg.enStpOut = Timer6PWMxPortOutLow; //PWMA port output set low level when CNTER stop
- stcTIM6PWMxCfg.enDisVal = Timer6PWMxDisValLow;
- Timer6_PortOutputConfig(M4_TMR61, Timer6PWMA, &stcTIM6PWMxCfg);
- Timer6_SetFunc(M4_TMR61, Timer6PWMA, Timer6ModeCompareOutput); //Compare output function
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