main.c

用C8051F芯片完成的温度远程采集程序,发送,接受两个模块通信完成,内嵌CRC算法.

#include <c8051f020.h>
#include <absacc.h>
#include <intrins.h>
#include "lcd_driver.h"
#include "delay.h"
#include "crc.h"

//------------------------
#define uchar unsigned char
#define uint  unsigned int


sfr16 DP       = 0x82;                 // data pointer
sfr16 TMR3RL   = 0x92;                 // Timer3 reload value
sfr16 TMR3     = 0x94;                 // Timer3 counter
sfr16 ADC0     = 0xbe;                 // ADC0 data
sfr16 ADC0GT   = 0xc4;                 // ADC0 greater than window
sfr16 ADC0LT   = 0xc6;                 // ADC0 less than window
sfr16 RCAP2    = 0xca;                 // Timer2 capture/reload
sfr16 T2       = 0xcc;                 // Timer2
sfr16 RCAP4    = 0xe4;                 // Timer4 capture/reload
sfr16 T4       = 0xf4;                 // Timer4
sfr16 DAC0     = 0xd2;                 // DAC0 data
sfr16 DAC1     = 0xd5;                 // DAC1 data


void  SYSCLK_Init(void);
void  PORT_Init(void);
void  Uart0_Init(void);
void  PCA0_Init(void);
void  ADC0_Init(void);
void  adc_cns(void);

#define sysclk         22118400        // SYSCLK frequency in Hz
#define baudrate       2400          // Baud rate of UART in bps
#define length         18	           //数据长度 + 两字节CRC值


uchar code welcome[]="    Welcome     Innovation Lab  ";

float temp;
uchar xdata buffer[length+1];
bit   enable;

extern uchar a;

//-----------------------------------------------------------------------------
// MAIN Routine
//-----------------------------------------------------------------------------

void main (void)
{  uchar i;
   SYSCLK_Init();                     // initialize oscillator
   PORT_Init();                       // initialize crossbar and GPIO
   LCD_Init();
   LCD_string(1,1,welcome);			  // 欢迎使用界面

   Uart0_Init();
   buffer[length] = 0;
	                      
   EA = 1;            
   while(1)
    {  
	   while(RI0 == 0);
	   if(SBUF0==0xff)				    //收到起始码，开始接收数据
	     enable=1;
	   RI0 = 0;
	   	
	   if(enable == 1)
	    {   	 
		   for(i=0;i<length+1;i++)		//增加结束码
		    {  
			   while(RI0 == 0);
			   if(SBUF0==0xfe)		    //收到结束码，停止接收数据
			    {
				  enable = 0;
				  buffer[length] = 0;                  //使数组最后一位为0，避免显示错误
				  if(CRC16_Check(buffer,length)==1)	   //CRC校验，正确时更新数据显示
	                {
		                 LCD_string(1,1,buffer+2);
	                }
				  break;							   //跳出FOR循环
				 }
			    else
		          buffer[i] = SBUF0;
		        RI0 = 0;
		    }
		 }
	  
  	}
}


void SYSCLK_Init (void)
{
   int i;                              // delay counter
   WDTCN = 0xde;                       // disable watchdog timer
   WDTCN = 0xad;    

   OSCXCN = 0x67;                      // start external oscillator with
   for (i=0; i < 256; i++);            // XTLVLD blanking interval (>1ms)
   while (!(OSCXCN & 0x80));           // Wait for crystal osc. to settle
   OSCICN = 0x88;                      // select external oscillator as SYSCLK
                                       // source and enable missing clock
                                       // detector
}

//-----------------------------------------------------------------------------
// PORT_Init
//-----------------------------------------------------------------------------
//
// Configure the Crossbar and GPIO ports
//
void PORT_Init (void)
{
   XBR0    = 0x0c;                     // 串口0允许
   XBR1    = 0x00;
   XBR2    = 0x40;                     // Enable crossbar and weak pull-ups
   
   P0MDOUT |= 0x03;
   P1MDOUT = 0xff;
   //P2MDOUT = 0xff;
   //P3MDOUT = 0xff;
   P74OUT  = 0xff;                    // P4-P7配置为推挽方式

}


void Uart0_Init(void)
{
   SCON0  = 0x50;                      // SCON0: mode 1, 8-bit UART, disenable RX	//0x50 enable RX
   TMOD  |= 0x20;                      // TMOD: timer 1, mode 2, 8-bit reload
   TH1    = -(sysclk/baudrate/192);     // set Timer1 reload value for baudrate
   CKCON |= 0x00;                      // Timer1 uses SYSCLK/12 as time base
   PCON  |= 0x80;                      // SMOD0 = 1
   TR1    = 1;                         // start Timer1
   //ES0    = 1;                         // enable UART0 interrupts
}