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ADC采集数据触发问题

Expert 1085 points
Other Parts Discussed in Thread: CONTROLSUITE

dsp28335使用EPWM1触发ADC采集数据,请问还需要对EPWM1单独配置吗,只是像图片中配置是不是就行了?不需要再单独配置EPWM吧?请各位帮帮忙,谢谢

  • 楼主实际试试就知道了,dsp28335没有用过。
  • 您可以参考一下例程内的配置

    C:\ti\controlSUITE\device_support\f2833x\v142\DSP2823x_examples_ccsv5

    如下

    //###########################################################################
    // Description:
    //! \addtogroup f2823x_example_list
    //! <h1>ePWM Action Qualifier Module using Upcount mode (epwm_up_aq)</h1>
    //!
    //! This example configures ePWM1, ePWM2, ePWM3 to produce a waveform with
    //! independent modulation on EPWMxA and EPWMxB. The compare values CMPA
    //! and CMPB are modified within the ePWM's ISR. The TB counter is in upmode.
    //!
    //! Monitor the ePWM1 - ePWM3 pins on an oscilloscope.
    //!
    //! \b External \b Connections \n
    //!  - EPWM1A is on GPIO0
    //!  - EPWM1B is on GPIO1
    //!  - EPWM2A is on GPIO2
    //!  - EPWM2B is on GPIO3
    //!  - EPWM3A is on GPIO4
    //!  - EPWM3B is on GPIO5
    //
    //###########################################################################
    // $TI Release: F2833x/F2823x Header Files and Peripheral Examples V142 $
    // $Release Date: November  1, 2016 $
    // $Copyright: Copyright (C) 2007-2016 Texas Instruments Incorporated -
    //             http://www.ti.com/ ALL RIGHTS RESERVED $
    //###########################################################################
    
    #include "DSP28x_Project.h"     // Device Headerfile and Examples Include File
    
    typedef struct
    {
       volatile struct EPWM_REGS *EPwmRegHandle;
       Uint16 EPwm_CMPA_Direction;
       Uint16 EPwm_CMPB_Direction;
       Uint16 EPwmTimerIntCount;
       Uint16 EPwmMaxCMPA;
       Uint16 EPwmMinCMPA;
       Uint16 EPwmMaxCMPB;
       Uint16 EPwmMinCMPB;
    }EPWM_INFO;
    
    // Prototype statements for functions found within this file.
    void InitEPwm1Example(void);
    void InitEPwm2Example(void);
    void InitEPwm3Example(void);
    __interrupt void epwm1_isr(void);
    __interrupt void epwm2_isr(void);
    __interrupt void epwm3_isr(void);
    void update_compare(EPWM_INFO*);
    
    // Global variables used in this example
    EPWM_INFO epwm1_info;
    EPWM_INFO epwm2_info;
    EPWM_INFO epwm3_info;
    
    // Configure the period for each timer
    #define EPWM1_TIMER_TBPRD  2000  // Period register
    #define EPWM1_MAX_CMPA     1950
    #define EPWM1_MIN_CMPA       50
    #define EPWM1_MAX_CMPB     1950
    #define EPWM1_MIN_CMPB       50
    
    #define EPWM2_TIMER_TBPRD  2000  // Period register
    #define EPWM2_MAX_CMPA     1950
    #define EPWM2_MIN_CMPA       50
    #define EPWM2_MAX_CMPB     1950
    #define EPWM2_MIN_CMPB       50
    
    #define EPWM3_TIMER_TBPRD  2000  // Period register
    #define EPWM3_MAX_CMPA      950
    #define EPWM3_MIN_CMPA       50
    #define EPWM3_MAX_CMPB     1950
    #define EPWM3_MIN_CMPB     1050
    
    // To keep track of which way the compare value is moving
    #define EPWM_CMP_UP   1
    #define EPWM_CMP_DOWN 0
    
    void main(void)
    {
    // Step 1. Initialize System Control:
    // PLL, WatchDog, enable Peripheral Clocks
    // This example function is found in the DSP2833x_SysCtrl.c file.
       InitSysCtrl();
    
    // Step 2. Initialize GPIO:
    // This example function is found in the DSP2833x_Gpio.c file and
    // illustrates how to set the GPIO to it's default state.
    // InitGpio();  // Skipped for this example
    
    // For this case just init GPIO pins for ePWM1, ePWM2, 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 interrupts 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 = 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 DSP2833x_DefaultIsr.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 = &epwm1_isr;
       PieVectTable.EPWM2_INT = &epwm2_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 initialize 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;
    
    // Enable EPWM INTn in the PIE: Group 3 interrupt 1-3
       PieCtrlRegs.PIEIER3.bit.INTx1 = 1;
       PieCtrlRegs.PIEIER3.bit.INTx2 = 1;
       PieCtrlRegs.PIEIER3.bit.INTx3 = 1;
    
    // Enable global Interrupts 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");
       }
    }
    
    __interrupt void epwm1_isr(void)
    {
       // Update the CMPA and CMPB values
       update_compare(&epwm1_info);
    
       // Clear INT flag for this timer
       EPwm1Regs.ETCLR.bit.INT = 1;
    
       // Acknowledge this interrupt to receive more interrupts from group 3
       PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;
    }
    
    __interrupt void epwm2_isr(void)
    {
       // Update the CMPA and CMPB values
       update_compare(&epwm2_info);
    
       // Clear INT flag for this timer
       EPwm2Regs.ETCLR.bit.INT = 1;
    
       // Acknowledge this interrupt to receive more interrupts from group 3
       PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;
    }
    
    __interrupt void epwm3_isr(void)
    {
       // Update the CMPA and CMPB values
       update_compare(&epwm3_info);
    
       // Clear INT flag for this timer
       EPwm3Regs.ETCLR.bit.INT = 1;
    
       // Acknowledge this interrupt to receive more interrupts from group 3
       PieCtrlRegs.PIEACK.all = PIEACK_GROUP3;
    }
    
    void InitEPwm1Example()
    {
       // Setup TBCLK
       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.TBPHS.half.TBPHS = 0x0000;       // Phase is 0
       EPwm1Regs.TBCTR = 0x0000;                  // Clear counter
       EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV2;   // Clock ratio to SYSCLKOUT
       EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV2;
    
       // 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;
       EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
    
       // Set Compare values
       EPwm1Regs.CMPA.half.CMPA = EPWM1_MIN_CMPA;    // Set compare A value
       EPwm1Regs.CMPB = EPWM1_MIN_CMPB;              // Set Compare B value
    
       // Set actions
       EPwm1Regs.AQCTLA.bit.ZRO = AQ_SET;            // Set PWM1A on Zero
       EPwm1Regs.AQCTLA.bit.CAU = AQ_CLEAR;          // Clear PWM1A on event A, up count
    
       EPwm1Regs.AQCTLB.bit.ZRO = AQ_SET;            // Set PWM1B on Zero
       EPwm1Regs.AQCTLB.bit.CBU = AQ_CLEAR;          // Clear PWM1B on event B, up count
    
       // Interrupt where we will change the Compare Values
       EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO;     // Select INT on Zero event
       EPwm1Regs.ETSEL.bit.INTEN = 1;                // Enable INT
       EPwm1Regs.ETPS.bit.INTPRD = ET_3RD;           // Generate INT on 3rd event
    
       // Information this example uses to keep track
       // of the direction the CMPA/CMPB values are
       // moving, the min and max allowed values and
       // a pointer to the correct ePWM registers
       epwm1_info.EPwm_CMPA_Direction = EPWM_CMP_UP; // Start by increasing CMPA & CMPB
       epwm1_info.EPwm_CMPB_Direction = EPWM_CMP_UP;
       epwm1_info.EPwmTimerIntCount = 0;             // Zero the interrupt counter
       epwm1_info.EPwmRegHandle = &EPwm1Regs;        // Set the pointer to the ePWM module
       epwm1_info.EPwmMaxCMPA = EPWM1_MAX_CMPA;      // Setup min/max CMPA/CMPB values
       epwm1_info.EPwmMinCMPA = EPWM1_MIN_CMPA;
       epwm1_info.EPwmMaxCMPB = EPWM1_MAX_CMPB;
       epwm1_info.EPwmMinCMPB = EPWM1_MIN_CMPB;
    }
    
    void InitEPwm2Example()
    {
       // Setup TBCLK
       EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
       EPwm2Regs.TBPRD = EPWM2_TIMER_TBPRD;       // Set timer period
       EPwm2Regs.TBCTL.bit.PHSEN = TB_DISABLE;    // Disable phase loading
       EPwm2Regs.TBPHS.half.TBPHS = 0x0000;       // Phase is 0
       EPwm2Regs.TBCTR = 0x0000;                  // Clear counter
       EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV2;   // Clock ratio to SYSCLKOUT
       EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV2;
    
       // Setup shadow register load on ZERO
       EPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
       EPwm2Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
       EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
       EPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
    
       // Set Compare values
       EPwm2Regs.CMPA.half.CMPA = EPWM2_MIN_CMPA;       // Set compare A value
       EPwm2Regs.CMPB = EPWM2_MAX_CMPB;                 // Set Compare B value
    
       // Set actions
       EPwm2Regs.AQCTLA.bit.PRD = AQ_CLEAR;             // Clear PWM2A on Period
       EPwm2Regs.AQCTLA.bit.CAU = AQ_SET;               // Set PWM2A on event A, up count
    
       EPwm2Regs.AQCTLB.bit.PRD = AQ_CLEAR;             // Clear PWM2B on Period
       EPwm2Regs.AQCTLB.bit.CBU = AQ_SET;               // Set PWM2B on event B, up count
    
       // Interrupt where we will change the Compare Values
       EPwm2Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO;        // Select INT on Zero event
       EPwm2Regs.ETSEL.bit.INTEN = 1;                   // Enable INT
       EPwm2Regs.ETPS.bit.INTPRD = ET_3RD;              // Generate INT on 3rd event
    
       // Information this example uses to keep track
       // of the direction the CMPA/CMPB values are
       // moving, the min and max allowed values and
       // a pointer to the correct ePWM registers
       epwm2_info.EPwm_CMPA_Direction = EPWM_CMP_UP;    // Start by increasing CMPA
       epwm2_info.EPwm_CMPB_Direction = EPWM_CMP_DOWN;  // and decreasing CMPB
       epwm2_info.EPwmTimerIntCount = 0;                // Zero the interrupt counter
       epwm2_info.EPwmRegHandle = &EPwm2Regs;           // Set the pointer to the ePWM module
       epwm2_info.EPwmMaxCMPA = EPWM2_MAX_CMPA;         // Setup min/max CMPA/CMPB values
       epwm2_info.EPwmMinCMPA = EPWM2_MIN_CMPA;
       epwm2_info.EPwmMaxCMPB = EPWM2_MAX_CMPB;
       epwm2_info.EPwmMinCMPB = EPWM2_MIN_CMPB;
    }
    
    void InitEPwm3Example(void)
    {
       // Setup TBCLK
       EPwm3Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP; // Count up
       EPwm3Regs.TBPRD = EPWM3_TIMER_TBPRD;       // Set timer period
       EPwm3Regs.TBCTL.bit.PHSEN = TB_DISABLE;    // Disable phase loading
       EPwm3Regs.TBPHS.half.TBPHS = 0x0000;       // Phase is 0
       EPwm3Regs.TBCTR = 0x0000;                  // Clear counter
       EPwm3Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;   // Clock ratio to SYSCLKOUT
       EPwm3Regs.TBCTL.bit.CLKDIV = TB_DIV1;
    
       // Setup shadow register load on ZERO
       EPwm3Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
       EPwm3Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
       EPwm3Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO;
       EPwm3Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO;
    
       // Set Compare values
       EPwm3Regs.CMPA.half.CMPA = EPWM3_MIN_CMPA; // Set compare A value
       EPwm3Regs.CMPB = EPWM3_MAX_CMPB;           // Set Compare B value
    
       // Set Actions
       EPwm3Regs.AQCTLA.bit.CAU = AQ_SET;         // Set PWM3A on event B, up count
       EPwm3Regs.AQCTLA.bit.CBU = AQ_CLEAR;       // Clear PWM3A on event B, up count
    
       EPwm3Regs.AQCTLB.bit.ZRO = AQ_TOGGLE;      // Toggle EPWM3B on Zero
    
       // Interrupt where we will change the Compare Values
       EPwm3Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO;     // Select INT on Zero event
       EPwm3Regs.ETSEL.bit.INTEN = 1;                // Enable INT
       EPwm3Regs.ETPS.bit.INTPRD = ET_3RD;           // Generate INT on 3rd event
    
       // Start by increasing the compare A and decreasing compare B
       epwm3_info.EPwm_CMPA_Direction = EPWM_CMP_UP;
       epwm3_info.EPwm_CMPB_Direction = EPWM_CMP_DOWN;
       // Start the count at 0
       epwm3_info.EPwmTimerIntCount = 0;
       epwm3_info.EPwmRegHandle = &EPwm3Regs;
       epwm3_info.EPwmMaxCMPA = EPWM3_MAX_CMPA;
       epwm3_info.EPwmMinCMPA = EPWM3_MIN_CMPA;
       epwm3_info.EPwmMaxCMPB = EPWM3_MAX_CMPB;
       epwm3_info.EPwmMinCMPB = EPWM3_MIN_CMPB;
    }
    
    void update_compare(EPWM_INFO *epwm_info)
    {
       // Every 10'th interrupt, change the CMPA/CMPB values
       if(epwm_info->EPwmTimerIntCount == 10)
       {
           epwm_info->EPwmTimerIntCount = 0;
    
           // If we were increasing CMPA, check to see if
           // we reached the max value.  If not, increase CMPA
           // else, change directions and decrease CMPA
    	   if(epwm_info->EPwm_CMPA_Direction == EPWM_CMP_UP)
    	   {
    	       if(epwm_info->EPwmRegHandle->CMPA.half.CMPA < epwm_info->EPwmMaxCMPA)
    	       {
    	          epwm_info->EPwmRegHandle->CMPA.half.CMPA++;
    	       }
    	       else
    	       {
    	          epwm_info->EPwm_CMPA_Direction = EPWM_CMP_DOWN;
                  epwm_info->EPwmRegHandle->CMPA.half.CMPA--;
    	       }
    	   }
    
    	   // If we were decreasing CMPA, check to see if
           // we reached the min value.  If not, decrease CMPA
           // else, change directions and increase CMPA
    	   else
    	   {
    	       if(epwm_info->EPwmRegHandle->CMPA.half.CMPA == epwm_info->EPwmMinCMPA)
    	       {
    	          epwm_info->EPwm_CMPA_Direction = EPWM_CMP_UP;
    	          epwm_info->EPwmRegHandle->CMPA.half.CMPA++;
    	       }
    	       else
    	       {
    	          epwm_info->EPwmRegHandle->CMPA.half.CMPA--;
    	       }
    	   }
    
    	   // If we were increasing CMPB, check to see if
           // we reached the max value.  If not, increase CMPB
           // else, change directions and decrease CMPB
    	   if(epwm_info->EPwm_CMPB_Direction == EPWM_CMP_UP)
    	   {
    	       if(epwm_info->EPwmRegHandle->CMPB < epwm_info->EPwmMaxCMPB)
    	       {
    	          epwm_info->EPwmRegHandle->CMPB++;
    	       }
    	       else
    	       {
    	          epwm_info->EPwm_CMPB_Direction = EPWM_CMP_DOWN;
    	          epwm_info->EPwmRegHandle->CMPB--;
    	       }
    	   }
    
    	   // If we were decreasing CMPB, check to see if
           // we reached the min value.  If not, decrease CMPB
           // else, change directions and increase CMPB
    
    	   else
    	   {
    	       if(epwm_info->EPwmRegHandle->CMPB == epwm_info->EPwmMinCMPB)
    	       {
    	          epwm_info->EPwm_CMPB_Direction = EPWM_CMP_UP;
    	          epwm_info->EPwmRegHandle->CMPB++;
    	       }
    	       else
    	       {
    	          epwm_info->EPwmRegHandle->CMPB--;
    	       }
    	   }
       }
       else
       {
          epwm_info->EPwmTimerIntCount++;
       }
    
       return;
    }
    
    
    //===========================================================================
    // No more.
    //===========================================================================
    

  • 请问您用过28377吗?如果要使用adcb的话需要把soca改成ascb吗?
  • 非常感谢