ad_test.c

Embest EudKit-II教学系统配Samsung S3C44B0处理器的部分测试程序。

/*********************************************************************************************
* File：	ad_test.c
* Author:	embest
* Desc：	ad_test source code
* History:	
*********************************************************************************************/
#include "44b.h"
#include "44blib.h"

/*------------------------------------------------------------------------------------------*/
/*	 								function declare					 				    */
/*------------------------------------------------------------------------------------------*/
void adc_test(void);

/*********************************************************************************************
* name:		Main
* func:		c code entry
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Main(void)
{
	sys_init();                                                 // Initial 44B0X's Interrupt,Port and UART 

	//user interface 
	uart_printf("\n\r Embest Arm EduKit II Evaluation Board");
	uart_printf("\n S3C44B0x ADC Conversion Test Example\n");
	
	adc_test();                                                 // Test start
	
}

/*********************************************************************************************
* name:		adc_test
* func:		test adc
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void adc_test(void)
{
	int nAdcpsr;

	// Initialize adc
	rCLKCON = 0x7ff8;
	rADCCON = 0x1 | (0<<2);                                     // Enable ADC
	delay(100);                                                 // delay for 10ms for ADC reference voltage stabilization.
   
	//set ADCPSR value
	uart_printf( "Input ADCPSR value (1 - 255):" );
	nAdcpsr = uart_getintnum();
	rADCPSR = nAdcpsr;
	uart_printf( "ADC conversion freq. = %dHz\n", (int)(MCLK/(2.*(nAdcpsr+1.))/16.) ); 
    
	//AIN2 AD conversion
	uart_printf("\nPlease press 'Enter' to convert\n");
    while( uart_getch() != '\n' )
    {
		rADCCON = 0x1 | (0x2<<2);	                            // AIN2
		while( !(rADCCON&0x40) );	                            // wait  conversion finish
		uart_printf( "Ain2 = 0x%03x\n", rADCDAT );
    }
}