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标题: AD-DA转换电压表 [打印本页]

作者: 张衍波 时间: 2015-4-8 13:11
标题: AD-DA转换电压表
#define ENABLE_BIT_DEFINITIONS

#include "includes.h"

//#define Vref 50000
void init_adc(void);
void WDR(void);
void WDT_init(void);

//unsigned char adc_mux = 0x01;  //通道选择

unsigned char RSend;
unsigned char RS_buf[10];
unsigned char RS_flag;
void main(void)
{
float j;
int count;
unsigned char *test = "The Voltage is: ";
unsigned char *value = "0.000 V";
unsigned char *RS;
RS = RS_buf;
RS_flag = 0;
delay_nms(1);
//dataport=0xff;
OSCCAL=0Xab;//系统时钟校准，不同的芯片和不的频率，
init_adc();
InitSerial();
//init_time1();
Init_LCD();
// WDT_init();

LCD_DisplayString(1,1,test);
LCD_DisplayString(2,1,value);
put_string(value);
put_char(0x0d);
put_char(0x0a);
while(1)
{
   // j = (float)(((float)((Vref/1023)))*(ADCH*256+ADCL))/1000.00;
      j = (float)(((float)((Vref/1023)))*( ADC&0X3FF))/1000.00;
count = j*100;
      value[0] = count /1000+0x30;
      count = count %1000;
      value[2] = count /100+0x30;
      count = count %100;
      value[3] = count  /10 + 0x30;
      value[4] = count  %10 + 0x30;

      LCD_Cursor(0,1);
      LCD_DisplayString(2,1,value);
      put_string(value);
      put_char(0x0d);
      put_char(0x0a);
      delay_nms(1000);
      if(RS_flag)
      {
         LCD_DisplayString(2,10,RS);
         RS_flag = 0;
      }
}

}

#pragma vector = USART_RXC_vect
__interrupt void usart_isr( void )
{
SREG &= !(1<<7);
RS_flag = 1;
RSend++;
RS_buf[RSend] = UDR;
put_char(RS_buf[RSend]);
if(RSend>=10)
{
      RSend = 0;
}
SREG |= (1<<7);
}

[attach]2119[/attach]

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