adc.c.svn-base

Spearhead2000 的 USB驱动程序

/******************************************************************************
**                                                                           **
**  Copyright (c) 2000 ST Microelectronics                                   **
**  All rights reserved                                                      **
**                                                                           **
**      Filename  :  adc.c                                                   **
**      Author    :  Maurizio Costagliola                                    **
**      Revision  :  1.0                                                     **
**                                                                           **
**                                                                           **
**                                                                           **
*******************************************************************************/

/******************************************************************************/
#include "uart.h"
#include "adc.h"
#include "vic_pl190.h"
#include "gpio.h"

/************************ interrupt handler ************************/
void adc_int_handler()
{
	unsigned int avarage;
	
        avarage = ADCCntl->AVERAGE_REG;
	ADCCntl->ADC_STATUS_REG &= INT_CLR; //interrupt clear
	UART_print_integer((int)avarage);
	while (!(UART_putc(13)));
        while (!(UART_putc(10)));
	UART_tx_vec("press s to stop r to run again ",strlen("press s to stop r to run again"));
}

/********************* registers configuration ********************/
void adc_init()
{
        intctlIntRegister(ITC_ADC_int, adc_int_handler, 1);
	ADCCntl->ADC_STATUS_REG = 0x00000000;                // select the channel '0 and disable converter by default
	ADCCntl->ADC_CLK_REG = 0x000002CB;                   // ADC clock setting fadc=3Mhz
}


/***************************** adc test ***************************/
void adc_test(void)
{
    	static char schedule;
        static char channel,samples;
	
	schedule='r';
	while ((schedule == 'r') && (schedule != 's'))
	{
	    
	    
	    ADCCntl->ADC_STATUS_REG = 0x00000000;
	    
	    
	    UART_tx_vec("Select Channel (0 - f) ",strlen("Select Channel (1 - 16) "));
	    while (!(UART_getc(&channel)));
	    
	    switch (channel) 
	    {
	    case '0' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000000;
	  	      break;
	    case '1' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000002;
	  	      break;
	    case '2' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000004;
	  	      break;
	    case '3' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000006;
	  	      break;
	    case '4' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000008;
	  	      break;
	    case '5' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x0000000a;
	  	      break;
	    case '6' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x0000000c;
	  	      break;
	    case '7' :
	    	      ADCCntl->ADC_STATUS_REG |= 0x0000000e;
	    	      break;
	    case '8' :
	    	      ADCCntl->ADC_STATUS_REG |= 0x00000010;
	    	      break;
	    case '9' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000012;
	  	      break;
	    case 'a' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000014;
	  	      break;
	    case 'b' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000015;
	  	      break;
	    case 'c' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000018;
	  	      break;
	    case 'd' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x0000001a;
	  	      break;
	    case 'e' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x0000001c;
	  	      break;
	    case 'f' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x0000001e;
	  	      break;
	    } 
	    while (!(UART_putc(channel)));
            while (!(UART_putc(13)));
	    while (!(UART_putc(10)));
	    
            UART_tx_vec("Select number of samples for avarage",strlen("Select number of samples for avarage")); 	    
	    UART_tx_vec("O -> 0 samples",strlen("O -> 0 samples"));	    
	    UART_tx_vec("1 -> 2 samples",strlen("1 -> 2 samples"));	    
	    UART_tx_vec("2 -> 4 samples",strlen("2 -> 4 samples"));	    
	    UART_tx_vec("3 -> 8 samples",strlen("3 -> 8 samples"));		    
	    UART_tx_vec("4 -> 16 samples",strlen("4 -> 16 samples"));		    
	    UART_tx_vec("5 -> 32 samples",strlen("5 -> 32 samples"));		
	    UART_tx_vec("6 -> 64 samples",strlen("6 -> 64 samples")); 	    
	    UART_tx_vec("7 -> 128 samples",strlen("7 -> 128 samples")); 	    
	    while (!(UART_getc(&samples)));
	    samples='5';
            switch (samples) 
	    {
	    case '0' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000000;
	  	      break;
	    case '1' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000020;
	  	      break;
	    case '2' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000040;
	  	      break;
	    case '3' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000060;
	  	      break;
	    case '4' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x00000080;
	  	      break;
	    case '5' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x000000a0;
	  	      break;
	    case '6' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x000000c0;
	  	      break;
	    case '7' :
	  	      ADCCntl->ADC_STATUS_REG |= 0x000000e0;
	  	      break;
	  	    } 
            while (!(UART_putc(samples)));
            while (!(UART_putc(13)));
	    while (!(UART_putc(10)));

//	   APB_show_regs((unsigned int*)0x1200B000, (unsigned int*)0x00200000, 4);  

            ADCCntl->ADC_STATUS_REG |= MASK_EN;   //start conversion

//     	   APB_show_regs((unsigned int*)0x1200B000, (unsigned int*)0x00200010, 4); 

            while (!(UART_getc(&schedule))); 	    
            /* schedule='s'; */
            
            while( (schedule != 's') && (schedule != 'r')) 
            {
               while (!(UART_getc(&schedule)));
            }
            while (!(UART_putc(13)));
            while (!(UART_putc(10)));
  	   
       }
	
	

}