dsp280x_adc.c

基于有刷马达的C程序(在TI TMS320F2812上实现)

// TI File $Revision: /main/1 $
// Checkin $Date: December 1, 2004   11:11:30 $
//###########################################################################
//
// FILE:	DSP280x_Adc.c
//
// TITLE:	DSP280x ADC Initialization & Support Functions.
//
//###########################################################################
// $TI Release: DSP280x, DSP2801x Header Files V1.41 $
// $Release Date: August 7th, 2006 $
//###########################################################################

#include "DSP280x_Device.h"     // DSP280x Headerfile Include File
#include "DSP280x_Examples.h"   // DSP280x Examples Include File

#define ADC_usDELAY  5000L

//---------------------------------------------------------------------------
// InitAdc: 
//---------------------------------------------------------------------------
// This function initializes ADC to a known state.
//
// PLEASE NOTE, ADC INIT IS DIFFERENT ON 281x vs 280x DEVICES!!!
//

void InitAdc(void)
{
    extern void DSP28x_usDelay(Uint32 Count);

    // To powerup the ADC the ADCENCLK bit should be set first to enable
    // clocks, followed by powering up the bandgap, reference circuitry, and ADC core.
    // Before the first conversion is performed a 5ms delay must be observed 
	// after power up to give all analog circuits time to power up and settle

    // Please note that for the delay function below to operate correctly the 
	// CPU_CLOCK_SPEED define statement in the DSP280x_Examples.h file must 
	// contain the correct CPU clock period in nanoseconds. 

    AdcRegs.ADCTRL3.all = 0x00E0;  // Power up bandgap/reference/ADC circuits
    DELAY_US(ADC_usDELAY);         // Delay before converting ADC channels
// Configure ADC
   AdcRegs.ADCMAXCONV.all = 0x0003;       // Setup 2 conv's on SEQ1
   AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; // Setup ADCINA3 as 1st SEQ1 conv.
   AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x1; // Setup ADCINA2 as 2nd SEQ1 conv.
   AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0x2; // Setup ADCINA2 as 2nd SEQ1 conv.   
   AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 0x3; // Setup ADCINA2 as 2nd SEQ1 conv.    
   AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 1;// Enable SOCA from ePWM to start SEQ1
   AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;  // Enable SEQ1 interrupt (every EOS)

// Assumes ePWM1 clock is already enabled in InitSysCtrl();
   EPwm1Regs.ETSEL.bit.SOCAEN = 1;        // Enable SOC on A group
   EPwm1Regs.ETSEL.bit.SOCASEL = 4;       // Select SOC from from CPMA on upcount
   EPwm1Regs.ETPS.bit.SOCAPRD = 1;        // Generate pulse on 1st event 
  // EPwm1Regs.CMPA.half.CMPA = 0x0080;	  // Set compare A value
  // EPwm1Regs.TBPRD = 0xFFFF;              // Set period for ePWM1
  // EPwm1Regs.TBCTL.bit.CTRMODE = 0;		  // count up and start

// Wait for ADC interrupt
}
//2007-6-6--
/*
void InitAdc(void)
{
    extern void DSP28x_usDelay(Uint32 Count);

    // To powerup the ADC the ADCENCLK bit should be set first to enable
    // clocks, followed by powering up the bandgap, reference circuitry, and ADC core.
    // Before the first conversion is performed a 5ms delay must be observed 
	// after power up to give all analog circuits time to power up and settle

    // Please note that for the delay function below to operate correctly the 
	// CPU_CLOCK_SPEED define statement in the DSP280x_Examples.h file must 
	// contain the correct CPU clock period in nanoseconds. 

    AdcRegs.ADCTRL3.all = 0x00E0;  // Power up bandgap/reference/ADC circuits
    DELAY_US(ADC_usDELAY);         // Delay before converting ADC channels
// Configure ADC
//同步采样级联序列发生器模式
//初始化：
   AdcRegs.ADCTRL3.bit.SMODE_SEL = 0x1; // 设置同步采样模式
   AdcRegs.ADCTRL1.bit.SEQ_CASC = 0x1; // 设置级联采样模式
   AdcRegs.ADCMAXCONV.all = 0x0007; // 8 个双转换（共16 个）
   AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; // 设置从ADCINA0 & ADCINB0 转换
   AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x1; // 设置从ADCINA1 & ADCINB1 的转换
   AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0x2; // 设置从ADCINA2 & ADCINB2 的转换
   AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 0x3; // 设置从ADCINA3 & ADCINB3 的转换
   AdcRegs.ADCCHSELSEQ2.bit.CONV04 = 0x4; // 设置从ADCINA4 & ADCINB4 的转换
   AdcRegs.ADCCHSELSEQ2.bit.CONV05 = 0x5; // 设置从ADCINA5 & ADCINB5 的转换
   AdcRegs.ADCCHSELSEQ2.bit.CONV06 = 0x6; // 设置从ADCINA6 & ADCINB6 的转换
   AdcRegs.ADCCHSELSEQ2.bit.CONV07 = 0x7; // 设置从ADCINA7 & ADCINB7 的转换
   AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 1;// Enable SOCA from ePWM to start SEQ1
   AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;  // Enable SEQ1 interrupt (every EOS)
//-------------------------------------------------------------
// Assumes ePWM1 clock is already enabled in InitSysCtrl();
   EPwm2Regs.ETSEL.bit.SOCAEN = 1;        // Enable SOC on A group
   EPwm2Regs.ETSEL.bit.SOCASEL = 4;       // Select SOC from from CPMA on upcount
   EPwm2Regs.ETPS.bit.SOCAPRD = 1;        // Generate pulse on 1st event 
   EPwm2Regs.CMPA.half.CMPA = 0x0080;	  // Set compare A value
   //U32TBPRD=4960;
   EPwm2Regs.TBPRD =4960;//6200;//25010;  16000000*8/4/12800=5000;// Set period for ePWM1
   EPwm2Regs.TBCTL.bit.CTRMODE = 0;		  // count up and start
}
*/
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// End of file.
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