AD之后的数据怎么到UART0的？

只看该作者 · 2010-6-18 12:34

这程序的意思是不是把AD之后的温度通过UART0的TX0(P0.0)发送到LCD上？

AD之后的数据怎么到UART0的？
本人刚开始学单片机，不知道哪位愿意解释一下整个程序的过程（从AD到LCD的输出）？

只看该作者 · 2010-6-18 12:35

#include <c8051f020.h>
#include <stdio.h>
#include <INTRINS.H>
sfr16 DP    = 0x82;
sfr16 TMR3RL = 0x92;
sfr16 TMR3    = 0x94;
sfr16 ADC0    = 0xbe;
sfr16 ADC0GT = 0xc4;
sfr16 ADC0LT = 0xc6;
sfr16 RCAP2 = 0xca;
sfr16 T2    = 0xcc;
sfr16 RCAP4 = 0xe4;
sfr16 T4    = 0xf4;
sfr16 DAC0    = 0xd2;
sfr16 DAC1    = 0xd5;

#define BAUDRATE    115200
#define SYSCLK    22118400
#define SAMPLE_RATE  50000
#define INT_DEC    256
#define       AMX0SL_AIN 8

void SYSCLK_Init (void);
void PORT_Init (void);
void UART0_Init (void);
void ADC0_Init (void);
void Timer3_Init (int counts);
void ADC0_ISR (void);
void LCD_Init(void);

unsigned char xdata NCDdata[6]={0x30,0x30,0x30,0x2e,0x30,0x30};
long result;
unsigned char *lcdpoint;
unsigned char lcd_data_count;

void main (void) {
long temperature,x;
int temp_int, temp_frac;
char data1;

WDTCN = 0xde;
WDTCN = 0xad;

SYSCLK_Init ();
PORT_Init ();
UART0_Init ();
Timer3_Init (SYSCLK/SAMPLE_RATE);

ADC0_Init ();

      AD0EN = 1;

EA = 1;
      while(result==0);
      while (1) {
   EA = 0;
   temperature = result;
   EA = 1;

   temperature = temperature - 42380;
   temperature = (temperature * 100L) / 156;
   temp_int = temperature / 100;
   temp_frac = temperature - (temp_int * 100);
      printf ("Temperature is %+02d.%02d\n", temp_int, temp_frac);/

      NCDdata[0]=temp_int/100+0x30;NCDdata[1]=(temp_int%100)/10+0x30;NCDdata[2]=(temp_int%100)%10+0x30;
      NCDdata[4]=temp_frac/10+0x30;NCDdata[5]=temp_frac%10+0x30;

      LCD_Init();
      P2  = 0xA0;
      lcdpoint=&NCDdata;
      for(lcd_data_count=6;lcd_data_count>0;lcd_data_count--)
      {
                        data1=*lcdpoint;
                  P3 = data1;
                     P2 = 0X20;
            P2 = 0XA0;
            lcdpoint++;
                     for(x=0;x<0x5000;x++);
      }
      for(data1=0;data1<0x6;data1++)
      {
                     for(x=0;x<0xffff;x++)
                        {_nop_();}
   }
      }
}

void SYSCLK_Init (void)
{
int i;

OSCXCN = 0x67;
for (i=0; i < 256; i++) ;

while (!(OSCXCN & 0x80)) ;

OSCICN = 0x88;
}

void PORT_Init (void)
{
XBR0 = 0x04;
XBR1 = 0x00;
XBR2 = 0x40;
P0MDOUT |= 0x01;
P2MDOUT  = 0xe0;
P3MDOUT  = 0xff;
}

void UART0_Init (void)
{
SCON0 = 0x50;
TMOD = 0x20;
TH1 = -(SYSCLK/BAUDRATE/16);    // set Timer1 reload value for baudrate
TR1 = 1;                      // start Timer1
CKCON |= 0x10;                   // Timer1 uses SYSCLK as time base
PCON  |= 0x80;                   // SMOD00 = 1
TI0 = 1;                      // Indicate TX0 ready
}

//-----------------------------------------------------------------------------
// ADC0配置，T3定时启动ADC
//-----------------------------------------------------------------------------
void ADC0_Init (void)
{
ADC0CN = 0x05;                   // ADC0 T3定时采样,左对齐
REF0CN = 0x07;                   // 启用内部基准源
AMX0SL = AMX0SL_AIN;             // 选择采样输入源
ADC0CF = (SYSCLK/2500000) << 3;    // ADC conversion clock = 2.5MHz
ADC0CF |= 0x01;                   // PGA gain = 2

EIE2 |= 0x02;                      // 启用 ADC 中断
}

//-----------------------------------------------------------------------------
// Timer3配置，T3定时启动ADC
//-----------------------------------------------------------------------------
void Timer3_Init (int counts)
{
TMR3CN = 0x02;
TMR3RL  = -counts;
TMR3 = 0xffff;
EIE2 &= ~0x01;
TMR3CN |= 0x04;
}

//-----------------------------------------------------------------------------
// ADC0采样中断
//-----------------------------------------------------------------------------
void ADC0_ISR (void) interrupt 15
{
static unsigned int_dec=INT_DEC;
static long accumulator=0L;

AD0INT = 0;                                                 // 清 ADC 中断标志位

      accumulator += ADC0;             // 累加ADC采样数据
int_dec--;                         // 指针减1

if (int_dec == 0) {                // 累加完了吗？
   int_dec = INT_DEC;             // 指针复位
   result = accumulator >> 8;
   accumulator = 0L;             // 累加和变量清0
}
}
//LCD初始化
void LCD_Init(void)
{unsigned long x;
P2 = 0X80;
for(x=0;x<1000;x++);
//P7 = 0x30;                               /*一行显示*/
P3 = 0x38;                               /*两行显示*/
P2 = 0X00;//0x08;
P2 = 0X80;//0x09;
for(x=0;x<1000;x++);
P3 = 0x0e;
P2 = 0x00;
P2 = 0x80;
for(x=0;x<1000;x++);
P3=  0x06;
P2 = 0x00;
P2 = 0x80;
for(x=0;x<5000;x++);
P3 = 0x01;
P2 = 0x00;
P2 = 0x80;
for(x=0;x<5000;x++);
}

只看该作者 · 2010-6-19 22:15

AD之后的数据怎么到UART0的？
程序是长了点:lol

只看该作者 · 2010-6-19 22:19

好长的程序啊，先慢慢看一下

只看该作者 · 2010-6-22 23:17

程序是长了点，不知道能不能碰到高手

只看该作者 · 2010-6-30 14:52

通过串口中断发送啊