arm adc.c

S3c2410下ADC[LTC1867]的驱动程序,在LCD上可以直接显示读取的AD数据

//====================================================================
// File Name : Adc.c
// Function  : S3C2410 ADC Test 
// Program   : Kang, Weon Tark 
// Date      : May 22, 2002
// Version   : 0.0
// History
//   0.0 : Programming start (March 29,2002) -> KWT
//         ADC Test                          -> May 15, 2002 SOP
//====================================================================

#include "def.h"
#include "2410addr.h"
#include "2410lib.h"
#include "adc.h"

int adc_data_buf1;

//==================================================================================		
void ReadAdc()
{

    //(1<<14)--> A/D converter prescaler enable.
    //(preScaler<<6)--> A/D converter prescaler value.
    //(ch<<3)--> Analog input channel select.
    rADCCON = (1<<14)|(49<<6)|(0<<3);	//setup channel
    rADCCON|=0x1;   //start ADC0

    while(!(rADCCON & 0x8000));	//check if EC(End of Conversion) flag is high
    //Normal ADC conversion data value: 0 ~ 3FF
   adc_data_buf1= (int)(rADCDAT0 & 0x3ff );
   Uart_Printf( "%04d\n",adc_data_buf1 );
}