adc.c

来自「最新版IAR FOR ARM（EWARM）5.11中的代码例子」· C语言 代码 · 共 76 行

/*************************************************************************
 *
 *    Used with ICCARM and AARM.
 *
 *    (c) Copyright IAR Systems 2007
 *
 *    File name   : adc.c
 *    Description : Main file
 *
 *    History :
 *    1. Date        : August 2, 2007
 *       Author      : Stanimir Bonev
 *       Description : Create
 *
 *  This example project shows how to use the IAR Embedded Workbench for ARM
 * to develop code for the Samsung-S3F4A0K evaluation board. It shows
 * basic use of I/O and ADC.
 *  It printing all ADC channels voltage in IO windows
 *
 * Jumpers:
 *  All jumpers are in default position regarding board's manual
 *
 *    $Revision: 18083 $
 **************************************************************************/
#include <samsung\ios3f4a0k.h>
#include <stdio.h>
#include "arm_comm.h"
#include "board.h"

/*************************************************************************
 * Function Name: main
 * Parameters: none
 * Return: none
 *
 * Description: Main
 *
 *************************************************************************/
void main (void)
{
  Flo32 Tmp;
  // Configure I/Os for analog functions - ANAIN0 to ANAIN15
  IOCONF_MR11_bit.PIO3_0_F3EN  = IOCONF_MR11_bit.PIO3_1_F3EN  =\
  IOCONF_MR11_bit.PIO3_2_F3EN  = IOCONF_MR11_bit.PIO3_3_F3EN  =\
  IOCONF_MR11_bit.PIO3_4_F3EN  = IOCONF_MR11_bit.PIO3_5_F3EN  =\
  IOCONF_MR11_bit.PIO3_6_F3EN  = IOCONF_MR11_bit.PIO3_7_F3EN  =\
  IOCONF_MR12_bit.PIO3_8_F3EN  = IOCONF_MR12_bit.PIO3_9_F3EN  =\
  IOCONF_MR12_bit.PIO3_10_F3EN = IOCONF_MR12_bit.PIO3_11_F3EN =\
  IOCONF_MR12_bit.PIO3_12_F3EN = IOCONF_MR12_bit.PIO3_13_F3EN =\
  IOCONF_MR12_bit.PIO3_14_F3EN = IOCONF_MR12_bit.PIO3_15_F3EN = 1;

  // Initialize ADC - Max. ADC clock = 2.5MHz
  ADC_ECR = 1<<1;         // enable ADC clock
  ADC_CR  = 1;            // software reset
  ADC_MR_bit.PRLVAL = 8;  // ADC_CLK <= 2.5MHz
  ADC_MR_bit.IES = 0;     // Internal start
  ADC_MR_bit.NBRCH = 0;   // 1 conversion
  ADC_MR_bit.CONTCV = 0;  // no continuous conversion
  ADC_CR = 1<<1;          // ADC enable
  for(Int32U i = 0; i < 16; ++i)
  {
    // Set channel to convert
    ADC_CMR0_bit.CV1 = i;
    // Wait for ADC ready
    while(!ADC_SR_bit.READY);
    // Start conversion
    ADC_CR = 1<<3;
    // Wait for end of conversion
    while(!ADC_SR_bit.EOC);
    // Printing result
    Tmp = ADC_DR;
    printf("Ch %d - %.2f mV\n",i,Tmp*5000.0/1024.0);
  }
}