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急求帮助，我配置的ePWM软件强制输出无效，总是一高一低！

2015-12-04 分类：C2000™ 32位实时 MCU 阅读(347)

我的配置如下

EALLOW;

GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0; // Enable pull-up on GPIO0 (EPWM1A)

GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0; // Enable pull-up on GPIO1 (EPWM1B) 

GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; // Configure GPIO0 as EPWM1A
GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1; // Configure GPIO1 as EPWM1B
EDIS;

//EPwmReg1：
EPwm1Regs.TBCTL.all = 0xE010; //时基控制寄存器

EPwm1Regs.ETPS.all = 0x0100; //事件触发预分频寄存器

EPwm1Regs.ETSEL.all = 0x0A00; //事件触发选择寄存器

EPwm1Regs.TBCTR = 0x0000; //时基计数器初始化为0
EPwm1Regs.TBPRD = PWM_PRIED; //PWM周期值=1500
EPwm1Regs.TBPHS.half.TBPHS = 0x00; //时基计数器相位初始为0
EPwm1Regs.CMPA.half.CMPA = 0x0000; //CMPA=0
EPwm1Regs.CMPB = HALF_PWM_PRIED; //CMPB=750

EPwm1Regs.CMPCTL.all = 0x0000; //计数比较控制寄存器

EPwm1Regs.AQCTLA.all = 0x0120; //动作控制寄存器A

EPwm1Regs.AQCTLB.all = 0x0210; //动作控制寄存器B

EPwm1Regs.AQSFRC.all = 0x00C0; //动作软件强制寄存器

EPwm1Regs.AQCSFRC.all = 0x0000; //动作连续软件强制寄存器

EPwm1Regs.DBCTL.bit.IN_MODE = 00; //PWMA是双边沿延时输入源
EPwm1Regs.DBCTL.bit.POLSEL = 2; //PWMA不翻转，PWMB翻转
EPwm1Regs.DBCTL.bit.OUT_MODE = 3; //使能双边沿延时

EPwm1Regs.DBFED = PWM_DEADTIME; //下降沿死区=150
EPwm1Regs.DBRED = PWM_DEADTIME; //上升沿死区=150

EPwm1Regs.PCCTL.bit.CHPEN = 0; //禁止PWM斩波功能

EALLOW;
EPwm1Regs.TZCTL.all = 0x000A; //当错误事件发生时，ePWMA、ePWMB输出强制低
EDIS;

这样配置后我用下面的程序强制是输出低电平，发现PWMxA总是低的，PWMxB总为高

void PWM_Disable_Func()
{
EPwm1Regs.AQCSFRC.bit.CSFA = 1;
EPwm1Regs.AQCSFRC.bit.CSFB = 1;

EPwm2Regs.AQCSFRC.bit.CSFA = 1;
EPwm2Regs.AQCSFRC.bit.CSFB = 1;

EALLOW;
EPwm1Regs.TZCLR.bit.OST = 1;
EPwm1Regs.TZCLR.bit.INT = 1;

EPwm2Regs.TZCLR.bit.OST = 1;
EPwm2Regs.TZCLR.bit.INT = 1;
EDIS;
}

请大家帮帮忙，有知道的告诉我一下，谢谢

mangui zhang：

如果不强制输出高或低的话     是不是能正常输出PWM波 

如果可以    就可以排除外部强制拉高或拉低的硬件问题

我的配置如下

EALLOW;

GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0; // Enable pull-up on GPIO0 (EPWM1A)

GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0; // Enable pull-up on GPIO1 (EPWM1B) 

GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; // Configure GPIO0 as EPWM1A
GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1; // Configure GPIO1 as EPWM1B
EDIS;

//EPwmReg1：
EPwm1Regs.TBCTL.all = 0xE010; //时基控制寄存器

EPwm1Regs.ETPS.all = 0x0100; //事件触发预分频寄存器

EPwm1Regs.ETSEL.all = 0x0A00; //事件触发选择寄存器

EPwm1Regs.TBCTR = 0x0000; //时基计数器初始化为0
EPwm1Regs.TBPRD = PWM_PRIED; //PWM周期值=1500
EPwm1Regs.TBPHS.half.TBPHS = 0x00; //时基计数器相位初始为0
EPwm1Regs.CMPA.half.CMPA = 0x0000; //CMPA=0
EPwm1Regs.CMPB = HALF_PWM_PRIED; //CMPB=750

EPwm1Regs.CMPCTL.all = 0x0000; //计数比较控制寄存器

EPwm1Regs.AQCTLA.all = 0x0120; //动作控制寄存器A

EPwm1Regs.AQCTLB.all = 0x0210; //动作控制寄存器B

EPwm1Regs.AQSFRC.all = 0x00C0; //动作软件强制寄存器

EPwm1Regs.AQCSFRC.all = 0x0000; //动作连续软件强制寄存器

EPwm1Regs.DBCTL.bit.IN_MODE = 00; //PWMA是双边沿延时输入源
EPwm1Regs.DBCTL.bit.POLSEL = 2; //PWMA不翻转，PWMB翻转
EPwm1Regs.DBCTL.bit.OUT_MODE = 3; //使能双边沿延时

EPwm1Regs.DBFED = PWM_DEADTIME; //下降沿死区=150
EPwm1Regs.DBRED = PWM_DEADTIME; //上升沿死区=150

EPwm1Regs.PCCTL.bit.CHPEN = 0; //禁止PWM斩波功能

EALLOW;
EPwm1Regs.TZCTL.all = 0x000A; //当错误事件发生时，ePWMA、ePWMB输出强制低
EDIS;

这样配置后我用下面的程序强制是输出低电平，发现PWMxA总是低的，PWMxB总为高

void PWM_Disable_Func()
{
EPwm1Regs.AQCSFRC.bit.CSFA = 1;
EPwm1Regs.AQCSFRC.bit.CSFB = 1;

EPwm2Regs.AQCSFRC.bit.CSFA = 1;
EPwm2Regs.AQCSFRC.bit.CSFB = 1;

EALLOW;
EPwm1Regs.TZCLR.bit.OST = 1;
EPwm1Regs.TZCLR.bit.INT = 1;

EPwm2Regs.TZCLR.bit.OST = 1;
EPwm2Regs.TZCLR.bit.INT = 1;
EDIS;
}

请大家帮帮忙，有知道的告诉我一下，谢谢

Eric Ma：

如果用AQCSFRC这种方式，你需要把死区关掉。因为AQCSFRC只是强制AQ模块输出的PWM信号，但是后面它还会通过死区模块，死区模块只用到AQ输出的PWMA，PWMB是由PWMA翻转而来，所以输出到引脚上的，就仍然是一个互补的信号。

如果你要达到强制拉低拉高的方式，建议使用TZ模块的功能，配置OST模式，如果有OST信号，PWM引脚拉低，然后通过TZFRC软件产生OST，则可拉低，使用TZCLR可清楚OST。

Eric

我的配置如下

EALLOW;

GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0; // Enable pull-up on GPIO0 (EPWM1A)

GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0; // Enable pull-up on GPIO1 (EPWM1B) 

GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; // Configure GPIO0 as EPWM1A
GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1; // Configure GPIO1 as EPWM1B
EDIS;

//EPwmReg1：
EPwm1Regs.TBCTL.all = 0xE010; //时基控制寄存器

EPwm1Regs.ETPS.all = 0x0100; //事件触发预分频寄存器

EPwm1Regs.ETSEL.all = 0x0A00; //事件触发选择寄存器

EPwm1Regs.TBCTR = 0x0000; //时基计数器初始化为0
EPwm1Regs.TBPRD = PWM_PRIED; //PWM周期值=1500
EPwm1Regs.TBPHS.half.TBPHS = 0x00; //时基计数器相位初始为0
EPwm1Regs.CMPA.half.CMPA = 0x0000; //CMPA=0
EPwm1Regs.CMPB = HALF_PWM_PRIED; //CMPB=750

EPwm1Regs.CMPCTL.all = 0x0000; //计数比较控制寄存器

EPwm1Regs.AQCTLA.all = 0x0120; //动作控制寄存器A

EPwm1Regs.AQCTLB.all = 0x0210; //动作控制寄存器B

EPwm1Regs.AQSFRC.all = 0x00C0; //动作软件强制寄存器

EPwm1Regs.AQCSFRC.all = 0x0000; //动作连续软件强制寄存器

EPwm1Regs.DBCTL.bit.IN_MODE = 00; //PWMA是双边沿延时输入源
EPwm1Regs.DBCTL.bit.POLSEL = 2; //PWMA不翻转，PWMB翻转
EPwm1Regs.DBCTL.bit.OUT_MODE = 3; //使能双边沿延时

EPwm1Regs.DBFED = PWM_DEADTIME; //下降沿死区=150
EPwm1Regs.DBRED = PWM_DEADTIME; //上升沿死区=150

EPwm1Regs.PCCTL.bit.CHPEN = 0; //禁止PWM斩波功能

EALLOW;
EPwm1Regs.TZCTL.all = 0x000A; //当错误事件发生时，ePWMA、ePWMB输出强制低
EDIS;

这样配置后我用下面的程序强制是输出低电平，发现PWMxA总是低的，PWMxB总为高

void PWM_Disable_Func()
{
EPwm1Regs.AQCSFRC.bit.CSFA = 1;
EPwm1Regs.AQCSFRC.bit.CSFB = 1;

EPwm2Regs.AQCSFRC.bit.CSFA = 1;
EPwm2Regs.AQCSFRC.bit.CSFB = 1;

EALLOW;
EPwm1Regs.TZCLR.bit.OST = 1;
EPwm1Regs.TZCLR.bit.INT = 1;

EPwm2Regs.TZCLR.bit.OST = 1;
EPwm2Regs.TZCLR.bit.INT = 1;
EDIS;
}

请大家帮帮忙，有知道的告诉我一下，谢谢

user1333144：

回复 Eric Ma:

清除OST的位置可不可以确定,因为我发送固定占空比,发现清除OST的时候,第一个看空比的是能的位置是随机的.能不能设置为ZRO生效或者PRD生效,28035mcu

我的配置如下

EALLOW;

GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0; // Enable pull-up on GPIO0 (EPWM1A)

GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0; // Enable pull-up on GPIO1 (EPWM1B) 

GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; // Configure GPIO0 as EPWM1A
GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1; // Configure GPIO1 as EPWM1B
EDIS;

//EPwmReg1：
EPwm1Regs.TBCTL.all = 0xE010; //时基控制寄存器

EPwm1Regs.ETPS.all = 0x0100; //事件触发预分频寄存器

EPwm1Regs.ETSEL.all = 0x0A00; //事件触发选择寄存器

EPwm1Regs.TBCTR = 0x0000; //时基计数器初始化为0
EPwm1Regs.TBPRD = PWM_PRIED; //PWM周期值=1500
EPwm1Regs.TBPHS.half.TBPHS = 0x00; //时基计数器相位初始为0
EPwm1Regs.CMPA.half.CMPA = 0x0000; //CMPA=0
EPwm1Regs.CMPB = HALF_PWM_PRIED; //CMPB=750

EPwm1Regs.CMPCTL.all = 0x0000; //计数比较控制寄存器

EPwm1Regs.AQCTLA.all = 0x0120; //动作控制寄存器A

EPwm1Regs.AQCTLB.all = 0x0210; //动作控制寄存器B

EPwm1Regs.AQSFRC.all = 0x00C0; //动作软件强制寄存器

EPwm1Regs.AQCSFRC.all = 0x0000; //动作连续软件强制寄存器

EPwm1Regs.DBCTL.bit.IN_MODE = 00; //PWMA是双边沿延时输入源
EPwm1Regs.DBCTL.bit.POLSEL = 2; //PWMA不翻转，PWMB翻转
EPwm1Regs.DBCTL.bit.OUT_MODE = 3; //使能双边沿延时

EPwm1Regs.DBFED = PWM_DEADTIME; //下降沿死区=150
EPwm1Regs.DBRED = PWM_DEADTIME; //上升沿死区=150

EPwm1Regs.PCCTL.bit.CHPEN = 0; //禁止PWM斩波功能

EALLOW;
EPwm1Regs.TZCTL.all = 0x000A; //当错误事件发生时，ePWMA、ePWMB输出强制低
EDIS;

这样配置后我用下面的程序强制是输出低电平，发现PWMxA总是低的，PWMxB总为高

void PWM_Disable_Func()
{
EPwm1Regs.AQCSFRC.bit.CSFA = 1;
EPwm1Regs.AQCSFRC.bit.CSFB = 1;

EPwm2Regs.AQCSFRC.bit.CSFA = 1;
EPwm2Regs.AQCSFRC.bit.CSFB = 1;

EALLOW;
EPwm1Regs.TZCLR.bit.OST = 1;
EPwm1Regs.TZCLR.bit.INT = 1;

EPwm2Regs.TZCLR.bit.OST = 1;
EPwm2Regs.TZCLR.bit.INT = 1;
EDIS;
}

请大家帮帮忙，有知道的告诉我一下，谢谢

user1333144：

回复 Eric Ma:

清除OST的位置可不可以确定,因为我发送固定占空比,发现清除OST的时候,第一个看空比的是能的位置是随机的.能不能设置为ZRO生效或者PRD生效,28035mcu

我的配置如下

EALLOW;

GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0; // Enable pull-up on GPIO0 (EPWM1A)

GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0; // Enable pull-up on GPIO1 (EPWM1B) 

GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; // Configure GPIO0 as EPWM1A
GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1; // Configure GPIO1 as EPWM1B
EDIS;

//EPwmReg1：
EPwm1Regs.TBCTL.all = 0xE010; //时基控制寄存器

EPwm1Regs.ETPS.all = 0x0100; //事件触发预分频寄存器

EPwm1Regs.ETSEL.all = 0x0A00; //事件触发选择寄存器

EPwm1Regs.TBCTR = 0x0000; //时基计数器初始化为0
EPwm1Regs.TBPRD = PWM_PRIED; //PWM周期值=1500
EPwm1Regs.TBPHS.half.TBPHS = 0x00; //时基计数器相位初始为0
EPwm1Regs.CMPA.half.CMPA = 0x0000; //CMPA=0
EPwm1Regs.CMPB = HALF_PWM_PRIED; //CMPB=750

EPwm1Regs.CMPCTL.all = 0x0000; //计数比较控制寄存器

EPwm1Regs.AQCTLA.all = 0x0120; //动作控制寄存器A

EPwm1Regs.AQCTLB.all = 0x0210; //动作控制寄存器B

EPwm1Regs.AQSFRC.all = 0x00C0; //动作软件强制寄存器

EPwm1Regs.AQCSFRC.all = 0x0000; //动作连续软件强制寄存器

EPwm1Regs.DBCTL.bit.IN_MODE = 00; //PWMA是双边沿延时输入源
EPwm1Regs.DBCTL.bit.POLSEL = 2; //PWMA不翻转，PWMB翻转
EPwm1Regs.DBCTL.bit.OUT_MODE = 3; //使能双边沿延时

EPwm1Regs.DBFED = PWM_DEADTIME; //下降沿死区=150
EPwm1Regs.DBRED = PWM_DEADTIME; //上升沿死区=150

EPwm1Regs.PCCTL.bit.CHPEN = 0; //禁止PWM斩波功能

EALLOW;
EPwm1Regs.TZCTL.all = 0x000A; //当错误事件发生时，ePWMA、ePWMB输出强制低
EDIS;

这样配置后我用下面的程序强制是输出低电平，发现PWMxA总是低的，PWMxB总为高

void PWM_Disable_Func()
{
EPwm1Regs.AQCSFRC.bit.CSFA = 1;
EPwm1Regs.AQCSFRC.bit.CSFB = 1;

EPwm2Regs.AQCSFRC.bit.CSFA = 1;
EPwm2Regs.AQCSFRC.bit.CSFB = 1;

EALLOW;
EPwm1Regs.TZCLR.bit.OST = 1;
EPwm1Regs.TZCLR.bit.INT = 1;

EPwm2Regs.TZCLR.bit.OST = 1;
EPwm2Regs.TZCLR.bit.INT = 1;
EDIS;
}

请大家帮帮忙，有知道的告诉我一下，谢谢

user1333144：

回复 Eric Ma:

Eric Ma

如果用AQCSFRC这种方式，你需要把死区关掉。因为AQCSFRC只是强制AQ模块输出的PWM信号，但是后面它还会通过死区模块，死区模块只用到AQ输出的PWMA，PWMB是由PWMA翻转而来，所以输出到引脚上的，就仍然是一个互补的信号。

如果你要达到强制拉低拉高的方式，建议使用TZ模块的功能，配置OST模式，如果有OST信号，PWM引脚拉低，然后通过TZFRC软件产生OST，则可拉低，使用TZCLR可清楚OST。

Eric

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