TI中文支持网配置F28035的PWM的EPWMxSYNCO输出同步脉冲信号，我配置成功后，EPWMxSYNCO输出的同步脉冲信号脉宽是100ns，我想问下这个同步脉冲的脉宽可以控制改变吗？还是说硬件控制就是这样的？谢谢~~
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
EPwm1Regs.TBPRD = EPWM1_TIMER_TBPRD; // Set timer period
EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;//TB_SYNC_DISABLE;
EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwm1Regs.TBCTR = 0x0000; // Clear counter
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; // Clock ratio to SYSCLKOUT
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; EALLOW;
GpioDataRegs.GPBCLEAR.bit.GPIO33 = 1;
GpioCtrlRegs.GPBPUD.bit.GPIO33 = 1; // Disable pull-up on GPIO33 (EPWMSYNCO)
GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 2; //
EDIS;
Eric Ma：
这个脉宽输出的宽度是不可以控制的。
Eric
配置F28035的PWM的EPWMxSYNCO输出同步脉冲信号，我配置成功后，EPWMxSYNCO输出的同步脉冲信号脉宽是100ns，我想问下这个同步脉冲的脉宽可以控制改变吗？还是说硬件控制就是这样的？谢谢~~
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
EPwm1Regs.TBPRD = EPWM1_TIMER_TBPRD; // Set timer period
EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;//TB_SYNC_DISABLE;
EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwm1Regs.TBCTR = 0x0000; // Clear counter
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; // Clock ratio to SYSCLKOUT
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; EALLOW;
GpioDataRegs.GPBCLEAR.bit.GPIO33 = 1;
GpioCtrlRegs.GPBPUD.bit.GPIO33 = 1; // Disable pull-up on GPIO33 (EPWMSYNCO)
GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 2; //
EDIS;
wei xing：
回复 Eric Ma:
100ns的宽度太窄了，有没有什么办法增加窄脉冲的宽度？
配置F28035的PWM的EPWMxSYNCO输出同步脉冲信号，我配置成功后，EPWMxSYNCO输出的同步脉冲信号脉宽是100ns，我想问下这个同步脉冲的脉宽可以控制改变吗？还是说硬件控制就是这样的？谢谢~~
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
EPwm1Regs.TBPRD = EPWM1_TIMER_TBPRD; // Set timer period
EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;//TB_SYNC_DISABLE;
EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwm1Regs.TBCTR = 0x0000; // Clear counter
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; // Clock ratio to SYSCLKOUT
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; EALLOW;
GpioDataRegs.GPBCLEAR.bit.GPIO33 = 1;
GpioCtrlRegs.GPBPUD.bit.GPIO33 = 1; // Disable pull-up on GPIO33 (EPWMSYNCO)
GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 2; //
EDIS;
wei xing：
回复 wei xing:
我需要一个占空比50%左右的一个波形
配置F28035的PWM的EPWMxSYNCO输出同步脉冲信号，我配置成功后，EPWMxSYNCO输出的同步脉冲信号脉宽是100ns，我想问下这个同步脉冲的脉宽可以控制改变吗？还是说硬件控制就是这样的？谢谢~~
EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
EPwm1Regs.TBPRD = EPWM1_TIMER_TBPRD; // Set timer period
EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Disable phase loading
EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO;//TB_SYNC_DISABLE;
EPwm1Regs.TBPHS.half.TBPHS = 0x0000; // Phase is 0
EPwm1Regs.TBCTR = 0x0000; // Clear counter
EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; // Clock ratio to SYSCLKOUT
EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1; EALLOW;
GpioDataRegs.GPBCLEAR.bit.GPIO33 = 1;
GpioCtrlRegs.GPBPUD.bit.GPIO33 = 1; // Disable pull-up on GPIO33 (EPWMSYNCO)
GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 2; //
EDIS;
Eric Ma：
回复 wei xing:
内部的同步信号的脉宽是不可以调的。但是你要是对同步时间要求不是非常高的话，可以收到同步信号的时候，就产生中断，在中断中通过控制IO口。
Eric
