遇到f28m35中AD转换器通道以及触发源设置问题的

程序中首先AD初始化：

void A_Config(void)
{
  //Adc1Regs.ADCSOC0CTL.bit.
     EALLOW;
     Adc1Regs.ADCCTL2.bit.ADCNONOVERLAP = 1;     // Enable non-overlap mode i.e.
                                                                                                  // conversion and future sampling
                                                                                                   // events dont overlap
     Adc1Regs.ADCCTL1.bit.INTPULSEPOS   = 1;     // ADCINT1 trips after AdcResults latch

     Adc1Regs.INTSEL1N2.bit.INT1E       = 0;     // Enabled ADCINT1
     Adc1Regs.INTSEL1N2.bit.INT1CONT    = 0;     // Disable ADCINT1 Continuous mode
     Adc1Regs.INTSEL1N2.bit.INT1SEL     = 8;     // setup EOC0 to trigger ADCINT1 to fire
     Adc1Regs.ADCSOC0CTL.bit.CHSEL      = 15;    // set SOC0 channel select to
                                                 // ADC1B7
     Adc1Regs.ADCSOC1CTL.bit.CHSEL      = 15;    // set SOC0 channel select to
                                                 // ADC1B7
     Adc1Regs.ADCSOC2CTL.bit.CHSEL      = 12;    // set SOC1 channel select to
                                                 // ADC1B4
     Adc1Regs.ADCSOC3CTL.bit.CHSEL      = 11;     // set SOC0 channel select to
                                                 // ADC1B3
     Adc1Regs.ADCSOC4CTL.bit.CHSEL      = 8;     // set SOC1 channel select to
                                                 // ADC1B0
     Adc1Regs.ADCSOC5CTL.bit.CHSEL      = 0;     // set SOC0 channel select to
                                                 // ADC1A0
     Adc1Regs.ADCSOC6CTL.bit.CHSEL      = 2;     // set SOC1 channel select to
                                                 // ADC1A2
     Adc1Regs.ADCSOC7CTL.bit.CHSEL      = 3;     // set SOC0 channel select to
                                                 // ADC1A3
     Adc1Regs.ADCSOC8CTL.bit.CHSEL      = 4;     // set SOC1 channel select to
                                                 // ADC1A4
     AnalogSysctrlRegs.TRIG1SEL.all     = 5;     // Assigning EPWM1SOCA to
                                                 // ADC TRIGGER 1 of the ADC module
     Adc1Regs.ADCSOC0CTL.bit.TRIGSEL    = 5;     // Set SOC0 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC1CTL.bit.TRIGSEL    = 5;     // set SOC1 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC2CTL.bit.TRIGSEL    = 5;     // Set SOC0 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC3CTL.bit.TRIGSEL    = 5;     // set SOC1 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC4CTL.bit.TRIGSEL    = 5;     // Set SOC0 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC5CTL.bit.TRIGSEL    = 5;     // set SOC1 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC6CTL.bit.TRIGSEL    = 5;     // Set SOC0 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC7CTL.bit.TRIGSEL    = 5;     // set SOC1 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC8CTL.bit.TRIGSEL    = 5;     // set SOC1 start trigger to
                                                 // ADC Trigger 1(EPWM1 SOCA) of the
                                                 // adc
     Adc1Regs.ADCSOC0CTL.bit.ACQPS      = 6;     // set SOC0 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC1CTL.bit.ACQPS      = 6;     // set SOC1 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC2CTL.bit.ACQPS      = 6;     // set SOC0 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC3CTL.bit.ACQPS      = 6;     // set SOC1 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC4CTL.bit.ACQPS      = 6;     // set SOC0 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC5CTL.bit.ACQPS      = 6;     // set SOC1 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC6CTL.bit.ACQPS      = 6;     // set SOC0 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC7CTL.bit.ACQPS      = 6;     // set SOC1 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     Adc1Regs.ADCSOC8CTL.bit.ACQPS      = 6;     // set SOC1 S/H Window to 7 ADC
                                                 // Clock Cycles, (6 ACQPS plus
                                                 // 1)
     EDIS;

}

 然后配置EPW1A来出发ADC

//--------------------------------------------------------------------------------
    EPwm1Regs.ETSEL.bit.INTEN  = 1;     // Enable EPWM1INT generation
    EPwm1Regs.ETSEL.bit.INTSEL  = 1;    // Enable interrupt CNT_zero event
    EPwm1Regs.ETPS.bit.INTPRD  = 1;     // Generate interrupt on the 1st event
 EPwm1Regs.ETCLR.bit.INT  = 1;      // Enable more interrupts

    /* Set up Event Trigger with CNT_zero enable for Time-base of EPWM1 */      \
    EPwm1Regs.ETSEL.bit.SOCAEN  = 1;      /* Enable SOCA */          \
    EPwm1Regs.ETSEL.bit.SOCASEL = 2;     /* Enable period event for SOCA */      \
    EPwm1Regs.ETPS.bit.SOCAPRD  = 1;      /* Generate SOCA on the 1st event */     \
 EPwm1Regs.ETCLR.bit.SOCA  = 1;        /* Clear SOCA flag */
//----------------------------------------------------------------------------------

 然后读取AD中断数据：

interrupt void adc1_isr(void)
{
 LoopCount++;
 m_voltage_ab = Adc1Result.ADCRESULT1;   //phase AB voltage
 m_voltage_bc = Adc1Result.ADCRESULT2;   //phase BC voltage
 m_voltage_ca = Adc1Result.ADCRESULT3;   //phase CA voltage
 m_current_ab = Adc1Result.ADCRESULT5;   //phase AB current
 m_current_bc = Adc1Result.ADCRESULT7;   //phase BC current
 m_current_ca = Adc1Result.ADCRESULT8;   //phase CA current
 m_voltage_mx = Adc1Result.ADCRESULT4;   //DC voltage
 m_current_mx = Adc1Result.ADCRESULT8;   //DC current

 m_voltage_output_add+=m_voltage_ca;

 if(LoopCount > 499)
  LoopCount = 0;
 //
// uab_array[LoopCount] = m_voltage_ca;
// ubc_array[LoopCount] = m_voltage_bc;
// uca_array[LoopCount] = m_voltage_ca;

// if(ConversionCount == 9)
// {
//  ConversionCount = 0;
//  m_voltage_output_avg=(m_voltage_output_add*36)>>9;
//  m_voltage_output_add = 0;
// }
// else
//  ConversionCount ++;

 //m_vol_mx    = Adc1Result.ADCRESULT0;  //A0-DC line voltage
 //m_tempurature_pfc  = Adc1Result.ADCRESULT1;  //A1-PFC module temperature
 //m_output_cur_setting = Adc1Result.ADCRESULT2;  //A2-setting maxim DC output current
 //m_output_vol_setting = Adc1Result.ADCRESULT3;     //A3- setting the maxim output voltage
 //m_temperature_ext  = Adc1Result.ADCRESULT4;  //B0-temperature of exit point
 //m_current_xz   = Adc1Result.ADCRESULT5;  //B1-current of resonant
 //m_voltage_output  = Adc1Result.ADCRESULT6;  //B2-current of the output
 //m_current_output  = Adc1Result.ADCRESULT7;  //B3-current of DC output

    Adc1Regs.ADCINTFLGCLR.bit.ADCINT1 = 1;  //Clear ADCINT1 flag reinitialize
                                            // for next SOC
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; // Acknowledge interrupt to PIE
}

发现读出的三相电压数据矢量和不等于零，

TI示例程序中是两通道ADC1A0和ADC1A2的信号采集，我把通道都选择B7（15通道），读出的AD值也不一样

main()
{
    unsigned short analoginit;

// Step 1. Initialize System Control for Control and Analog Subsytems
// Enable Peripheral Clocks
// This example function is found in the F28M35x_SysCtrl.c file.
    InitSysCtrl();
   
// If project is linked into flash, copy critical code sections to RAM.   
#ifdef _FLASH
   memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
#endif   

// Step 2. Initialize GPIO:
// This example function is found in the F28M35x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();  // Skipped for this example
    EALLOW;
    GpioG1CtrlRegs.GPADIR.bit.GPIO0      = 1;       //Set as output
    GpioG1CtrlRegs.GPADIR.bit.GPIO8      = 1;       //Set as output
    GpioG1CtrlRegs.GPAMUX1.bit.GPIO0     = 1;      //Set mux to EPWM1A
    GpioG1CtrlRegs.GPAMUX1.bit.GPIO8     = 3;      //Set mux to ADCSOCAn
    EDIS;

    EALLOW;
    GpioG1CtrlRegs.GPCDIR.bit.GPIO69 = 1;
    GpioG1CtrlRegs.GPCDIR.bit.GPIO70 = 1;
    GpioG1CtrlRegs.GPCDIR.bit.GPIO71 = 1;
    EDIS;
    GpioG1DataRegs.GPCDAT.bit.GPIO69 = 1;
    GpioG1DataRegs.GPCDAT.bit.GPIO70 = 1;
    GpioG1DataRegs.GPCDAT.bit.GPIO71 = 0;

// 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 interrupts disabled and flags
// are cleared.
// This function is found in the F28M35x_PieCtrl.c file.
    InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
    IER = 0x0000;
    IFR = 0x0000;

// 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 F28M35x_DefaultIsr.c.
// This function is found in F28M35x_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 register
    PieVectTable.ADCINT1 = &adc1_isr;
    EDIS;   // This is needed to disable write to EALLOW protected registers

// Step 4. Initialize all the Device Peripherals:
// This function is found in F28M35x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
    InitAdc1(); // For this example, init the ADC

// Step 5. User specific code, enable interrupts:

// Enable ADCINT1 in PIE
    PieCtrlRegs.PIEIER1.bit.INTx1 = 1;  // Enable INT 1.1 in the PIE
    IER |= M_INT1;                      // Enable CPU Interrupt 1
    EINT;                               // Enable Global interrupt INTM
    ERTM;                               // Enable Global realtime interrupt DBGM

    LoopCount = 0;
    ConversionCount = 0;
    delay = 0;

// Configure ADC
    EALLOW;
    Adc1Regs.ADCCTL2.bit.ADCNONOVERLAP = 1;     // Enable non-overlap mode i.e.
                                                // conversion and future
                                                // sampling
                                                // events dont overlap
    Adc1Regs.ADCCTL1.bit.INTPULSEPOS   = 1;     // ADCINT1 trips after
                                                // AdcResults latch
    Adc1Regs.INTSEL1N2.bit.INT2E       = 1;     // Enabled ADCINT1
    Adc1Regs.INTSEL1N2.bit.INT1CONT    = 0;     // Disable ADCINT1 Continuous
                                                // mode
    Adc1Regs.INTSEL1N2.bit.INT2SEL     = 0;     // setup EOC0 to trigger ADCINT1
                                                // to fire
    Adc1Regs.ADCSOC0CTL.bit.CHSEL      = 15;     // set SOC0 channel select to
                                                // ADC1A0
    Adc1Regs.ADCSOC1CTL.bit.CHSEL      = 15;     // set SOC1 channel select to
                                                // ADC1A2
    AnalogSysctrlRegs.TRIG1SEL.all     = 5;     // Assigning EPWM1SOCA to
                                                // ADC TRIGGER 1 of the ADC module
    Adc1Regs.ADCSOC0CTL.bit.TRIGSEL    = 5;     // Set SOC0 start trigger to
                                                // ADC Trigger 1(EPWM1 SOCA) of the
                                                // adc
    Adc1Regs.ADCSOC1CTL.bit.TRIGSEL    = 5;     // set SOC1 start trigger to
                                                // ADC Trigger 1(EPWM1 SOCA) of the
                                                // adc
    Adc1Regs.ADCSOC0CTL.bit.ACQPS      = 6;     // set SOC0 S/H Window to 7 ADC
                                                // Clock Cycles, (6 ACQPS plus
                                                // 1)
    Adc1Regs.ADCSOC1CTL.bit.ACQPS      = 6;     // set SOC1 S/H Window to 7 ADC
                                                // Clock Cycles, (6 ACQPS plus
                                                // 1)

    EDIS;

//// Assumes ePWM1 clock is already enabled in InitSysCtrl();

    //Set event triggers (SOCA) for ADC SOC1
    EPwm1Regs.ETSEL.bit.SOCAEN         = 1;      // Enable SOC on A group
    EPwm1Regs.ETSEL.bit.SOCASEL = ET_CTRU_CMPA;  // Select SOC from CMPA on
                                                 // upcount
    EPwm1Regs.ETPS.bit.SOCAPRD         = 3;      // Generate pulse on every 3rd
                                                 // event

    // Time-base registers
    EPwm1Regs.TBPRD = 2000;//PERIOD;                   // Set timer period, PWM
                                                // frequency = 1 / period
    EPwm1Regs.TBPHS.all = 0;                    // Time-Base Phase Register
    EPwm1Regs.TBCTR = 0;                        // Time-Base Counter Register
    EPwm1Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE;   // Set Immediate load
    EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;//TB_COUNT_UP;  // Count-up mode: used for
                                                // asymmetric PWM
    EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE;     // Disable phase loading
    EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE;
    EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;
    EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1;

    // Setup shadow register load on ZERO

    EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
    EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; // load on CTR=Zero
    EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; // load on CTR=Zero

    // Set Compare values

    EPwm1Regs.CMPA.half.CMPA = DUTY_CYCLE_A;     // Set duty 50% initially
    EPwm1Regs.CMPB = DUTY_CYCLE_B;               // Set duty 50% initially

    // Set actions

    EPwm1Regs.AQCTLA.bit.ZRO = AQ_SET;           // Set PWM2A on Zero
    EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;         // Clear PWM2A on event A, up
                                                 // count

    EPwm1Regs.AQCTLB.bit.ZRO = AQ_CLEAR;         // Set PWM2B on Zero
    EPwm1Regs.AQCTLB.bit.CBU = AQ_SET;           // Clear PWM2B on event B, up
                                                 // count

// Wait for ADC interrupt
    for(;;)
    {
        LoopCount++;
     GpioG1DataRegs.GPCDAT.bit.GPIO69 = 0;
     GpioG1DataRegs.GPCDAT.bit.GPIO70 = 0;
     GpioG1DataRegs.GPCDAT.bit.GPIO71 = 1;
     for(delay =0 ;delay< 200000;delay++)
     {
     }
     GpioG1DataRegs.GPCDAT.bit.GPIO69 = 1;
     GpioG1DataRegs.GPCDAT.bit.GPIO70 = 1;
     GpioG1DataRegs.GPCDAT.bit.GPIO71 = 0;
     for(delay =0 ;delay< 200000;delay++)
     {
     }
    }

}

interrupt void  adc1_isr(void)
{
    Voltage1[ConversionCount] = Adc1Result.ADCRESULT0;
    Voltage2[ConversionCount] = Adc1Result.ADCRESULT1;
    Voltage3[ConversionCount] = Adc1Result.ADCRESULT2;
    Voltage4[ConversionCount] = Adc1Result.ADCRESULT3;
    Voltage5[ConversionCount] = Adc1Result.ADCRESULT4;
    Voltage6[ConversionCount] = Adc1Result.ADCRESULT5;
    Voltage7[ConversionCount] = Adc1Result.ADCRESULT6;
    Voltage8[ConversionCount] = Adc1Result.ADCRESULT7;
    Voltage9[ConversionCount] = Adc1Result.ADCRESULT8;

    // If 20 conversions have been logged, start over
    if(ConversionCount == 9)
    {
        ConversionCount = 0;
    }
    else ConversionCount++;

    Adc1Regs.ADCINTFLGCLR.bit.ADCINT1 = 1;  //Clear ADCINT1 flag reinitialize
                                            // for next SOC
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; // Acknowledge interrupt to PIE

    return;
}

不知道该怎么配置初始化程序，求高手指点,谢谢！
 

Wang,

可以参考例程C:\ti\controlSUITE\device_support\f28m35x\v200\F28M35x_examples_Control\adc_soc

如果要使用一个触发源触发8 个通道的话，

只要设置8个SOC，然后使用相同的TRIGSEL，再给个输入通道，配置采样窗，采样窗有些值不能设，要看user guide关于采样窗的说明。当然也可以按照例程来写。

Eric

另外关于语句：

AdclogSysCtrlRegs.TRIG1SEL.all = 5;

Adc1Regs.ADCSOC0CTL.bit.TRIGSEL =5;        //选用EPWM1A 作为触发源。

我认为第二条语句更属于TI的编程习惯。

第二条语句是对SOC触发源的配置。至于第一条语句，从字面上看是相同意思，但看似不符合TI的编程命名规范，需要查看文件中关于这个结构体的具体定义，看是对应哪个寄存器。

Eric

谢谢Eric Ma先生的回答！

  我用C:\ti\controlSUITE\device_support\f28m35x\v200\F28M35x_examples_Control\adc_soc示例程序来运行，仅仅改变通道号从A0,A2改为B7,B7，输入一个正弦波，按道理来说，采集出来的结果应该是很接近的，但实际上差别太大，AdcResult0为2800，，AdcResult1甚至是700,就是这点感觉太离谱，相邻转换应该是一个触发源到来之后，每个通道挨个转换，其间的时间差也就570ns左右，怎么也不会得到那么悬殊的结果；

还有一个问题，ADC中断有在PIE-vector中有1.1-Adc1、1.2-Adc2两个中断，同时还有pie10中的ADC1到ADC8中断，我没看到手册中介绍这部分怎么区分的，示例程序中也是用的1.1-Adc1中断。

Wang,

可以使用realtime的模式debug，然后点击watchwindow右上角的continuous refresh。

就可以观察到实时数据。

Eric

可否跟您请教一下 ADC的一些问题  我用的也是F28M35   在查看采集的电压信号时， 电压数组中的数据不正常。不知道具体原因

这是什么意思？ result0中赋值到数组一个数组中  难道这个数组中的数值不是相邻采样得到的？

Rufeng,

你可以新开一个帖子，然后把问题描述的更具体一点。

也可以把ADC的初始化配置贴出来。

Eric

如果是三相电压采集，你用clarke变换看一看三个结果相加是否为零，如果不为零，应该采集的有问题了。

AD的设置就是例子ADConvert中的一样的。

谢谢 大侠的关注， 我已经调试出来了~  设置没看仔细 哈哈哈……

谢谢 大侠的解答……我已经调试出……哈哈哈