LPC17xx ADC werte mit DMA in ein Feld kopieren

#ifdef __USE_CMSIS

#include "LPC17xx.h"

#endif

#include <cr_section_macros.h>

#include <NXP/crp.h>

volatile int arrADC[40];

// Variable to store CRP value in. Will be placed automatically

// by the linker when "Enable Code Read Protect" selected.

// See crp.h header for more information

__CRP extern const unsigned int CRP_WORD = CRP_NO_CRP ;

void adcInit(){

   /* Enable CLOCK into ADC controller */

  LPC_SC->PCONP |= (1 << 12);

  /* all the related pins are set to ADC inputs, AD0.0~7 */

  LPC_PINCON->PINSEL1 &= ~0x003FC000;  /* P0.23~26, A0.0~3, function 01 */

  LPC_PINCON->PINSEL1 |= (1<<14); //p0.23 adc

  /* No pull-up no pull-down (function 10) on these ADC pins. */

  LPC_PINCON->PINMODE1 &= ~0x003FC000;

  LPC_PINCON->PINMODE1 |= (1<<15);

  LPC_ADC->ADINTEN = 1;

  LPC_ADC->ADCR = ( 0x01 << 0 ) | ( 15 << 8 ) | ( 1 << 16 ) | ( 1 << 21 );

  /* ADC Interrupt is needed, but NVIC is not necessary for ADC DMA. */

  NVIC_DisableIRQ(ADC_IRQn);

}

void dmaInit(){

  LPC_SC->PCONP |= (1<<29);

//DMA Controller enable

  LPC_GPDMA->DMACConfig = 1;

  LPC_GPDMA->DMACIntTCClear = 0xff;

  LPC_GPDMA->DMACIntErrClr = 0xff;

}

void dmaChanInit(){

  LPC_GPDMACH0->DMACCConfig = 0;

  LPC_GPDMACH0->DMACCControl = 0;

  LPC_GPDMACH0->DMACCSrcAddr = 0x40034010; //AD0DR0

  LPC_GPDMACH0->DMACCDestAddr =  (int ) arrADC;

  LPC_GPDMACH0->DMACCLLI = 0x40034010; //AD0DR0

  LPC_GPDMACH0->DMACCControl = (0x20 << 0)| (0x2 << 12)|(0x2 << 12)|(0x2 << 18)|(0x2 << 21)|(1<<27);

  LPC_GPDMACH0->DMACCConfig = (1<<0)|(0x4 << 1)|(0x00 <<6)|(0x2 << 11);

}

int main(void) {

  adcInit();

  dmaInit();

  dmaChanInit();

  int x = 1000;

  while (x)

    x--;

  while(1);

  return 0 ;

}