dsp28_adc_demo.c

基于2812的触摸屏的程序,能够显示基本图形.

//
//      TMDX ALPHA RELEASE
//      Intended for product evaluation purposes
//
//###########################################################################
//
// FILE:	DSP28_Adc.c
//
// TITLE:	DSP28 ADC Initialization & Support Functions.
//
//###########################################################################
//
//  Ver | dd mmm yyyy | Who  | Description of changes
// =====|=============|======|===============================================
//  0.55| 06 May 2002 | L.H. | EzDSP Alpha Release
//  0.56| 20 May 2002 | L.H. | No change
//  0.57| 27 May 2002 | L.H. | No change
//###########################################################################

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File

//---------------------------------------------------------------------------
// InitAdc: 
//---------------------------------------------------------------------------
// This function initializes ADC to a known state.
//
void InitAdc(void)
{
	unsigned int i;
	
	AdcRegs.ADCTRL1.bit.RESET=1;
	asm(" RPT #15 || NOP");
	AdcRegs.ADCTRL1.bit.RESET=0;
	AdcRegs.ADCTRL1.bit.SUSMOD=0;
	AdcRegs.ADCTRL1.bit.ACQ_PS=7;
	AdcRegs.ADCTRL1.bit.CPS=0;
	AdcRegs.ADCTRL1.bit.CONT_RUN=0;
	AdcRegs.ADCTRL1.bit.SEQ_CASC=1;
	
	AdcRegs.ADCTRL3.bit.ADCBGRFDN=3;
	for(i=0;i<10000;i++)	 asm(" NOP");;
	AdcRegs.ADCTRL3.bit.ADCPWDN=1;
	for(i=0;i<5000;i++)	 asm(" NOP");
	
	AdcRegs.ADCTRL3.bit.ADCCLKPS=1;
	AdcRegs.ADCTRL3.bit.SMODE_SEL=0;
	
	AdcRegs.ADCMAXCONV.bit.MAX_CONV1=2;
	
	AdcRegs.ADCCHSELSEQ1.bit.CONV00=0;
	AdcRegs.ADCCHSELSEQ1.bit.CONV01=0;
	AdcRegs.ADCCHSELSEQ1.bit.CONV02=0;
	AdcRegs.ADCCHSELSEQ1.bit.CONV03=1;
	
	AdcRegs.ADCCHSELSEQ2.bit.CONV04=1;
	AdcRegs.ADCCHSELSEQ2.bit.CONV05=1;
	AdcRegs.ADCCHSELSEQ2.bit.CONV06=2;
	AdcRegs.ADCCHSELSEQ2.bit.CONV07=2;
	
	AdcRegs.ADCCHSELSEQ3.bit.CONV08=2;
	
	AdcRegs.ADCTRL2.all = 0;
	
}	


//===========================================================================
// No more.
//===========================================================================