📄 自动校正.c
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//-----------------------------------------------------------------------------
// ADC0_int2m.c
//-----------------------------------------------------------------------------
// DATE: 2007.9.5
//
// 采用比较器采样解调输入信号，输入信号每位周期1ms，采样周期0.5ms，
// 晶振25mhz，延时0.5ms子程序用到，必须保证时间的精准
// 比较器端口，p0.2
// 液晶显示数据口p7,控制口p3
// Target: C8051F020
// Tool chain: KEIL C51 6.03 / KEIL EVAL C51
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include <c8051f020.h> // SFR declarations
#include<math.h>
//-----------------------------------------------------------------------------
// 16-bit SFR Definitions for 'F02x
//-----------------------------------------------------------------------------
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 CPT1EN
sfr16 CP1FIF =0Xa2;
sfr16 CP1OUT =0XA0;
//-----------------------------------------------------------------------------
// Global CONSTANTS
//-----------------------------------------------------------------------------
#define SYSCLK 25000000 // SYSCLK frequency in Hz
#define SAMPLERATE0 3300 // ADC0 Sample frequency in Hz
#define VREF0 2430 // VREF voltage in volts
#define uchar unsigned char
#define uint unsigned int
#define dataport P7
#define ctime 100 //电平采样次数
//-----------------------------------------------------------------------------
// Function PROTOTYPES
//-----------------------------------------------------------------------------
void SYSCLK_Init (void);
void ADC0_Init (void);
void Timer3_Init (int counts);
void ADC0_ISR (void);
void dashu(void);
void xiaoshu0(flonum0);
void dealvoltage(void);
void scan(void);
even_odd(void);
void PORT_Init (void);
void lcd_init(void);
void writelcd(uchar disdata);
void writeinstru(uchar instru);
void dischar(uchar disch);
void display(void);
void delay0_5ms(void);
void delay1_5ms(void);
void key_Init(void);
unsigned char scankey(void);
//-----------------------------------------------------------------------------
// Global VARIABLES
//-----------------------------------------------------------------------------
unsigned char xdata tab4[10] ={'0','1','2','3','4','5','6','7','8','9'};
unsigned char xdata a=0x41;
unsigned char outbit[48];
long xdata result1[ctime];
long result; // AIN0-7 and temp sensor output
uint voltage;
// 可调参考门限电平
uint maxvoltage;
uint minvoltage;
uchar dealresult[3];
uchar maxresult[3];
uchar minresult[3];
uchar channel=0; // ADC mux channel (0-1)
uint num_samples = 0; // ADC0 sample counter参考电压
bit ch0;
bit sign;
bit oddright; // 奇偶校验正确标志位
bit readsign; //读取数据完毕标志位
bit tranover;
bit led1; // 接收的最高位
bit led2; // 接收的第二位
bit led3; // 接收的最三位
bit led4; // 接收的最四位
sbit led11=P2^0; // 接收的最高位
sbit led22=P2^1; // 接收的第二位
sbit led33=P2^2; // 接收的最三位
sbit led44=P2^3; // 接收的最四位
sbit led5=P2^4; // 接收的奇偶校验位
sbit vout=P0^2; // 比较器输出位
sbit RS = P3^6; /// 液晶控制管脚
sbit RD = P3^4; ////
sbit RST = P3^7; ///
sbit WR = P3^5; ////
//-----------------------------------------------------------------------------
// MAIN Routine
//-----------------------------------------------------------------------------
void main (void)
{
WDTCN = 0xde; // disable watchdog timer
WDTCN = 0xad;
SYSCLK_Init (); // initialize oscillator
PORT_Init (); // initialize crossbar and GPIO
lcd_init(); // 液晶初始化
Timer3_Init (SYSCLK/SAMPLERATE0); // initialize Timer3 to overflow atsample rate
ADC0_Init (); // init ADC
AD0EN = 1; // enable ADC
//CPT1CN|=0X80; //比较器允许
led11=0; // 接收的最高位
led22=0; // 接收的第二位
led33=0; // 接收的最三位
led44=0; // 接收的最四位
readsign=0; //奇偶校验正确标志位
CPT1CN|=0X80; //比较器允许
REF0CN = 0x07;
DAC0CN = 0x87; // enable DAC0 in left-justified mode
// 写dac0时更新输出
EA = 1; // Enable global interrupts
tranover=0;
while (1) {
dealvoltage();
display();
for(;;)
{
dealvoltage();
// display();
oddright=0;
scan();
//扫描接收数据
if(readsign==1)
oddright=even_odd(); //奇偶校验
if(oddright==1)
break;
}
display();
}
}
//-----------------------------------------------------------------------------
// SYSCLK_Init
//-----------------------------------------------------------------------------
//
// This routine initializes the system clock to use an 25MHz crystal
// as its clock source.
//
void SYSCLK_Init (void)
{
int i; // delay counter
OSCXCN = 0x67; // start external oscillator with
// 25MHz crystal
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 = 0x04; // Enable UART0
XBR1 = 0x01;
XBR2 = 0x40; // Enable crossbar and weak pull-ups
P0MDOUT = 0xff;
P1MDOUT = 0x00; // All P0 pins open-drain output
P2MDOUT = 0xff;
P3MDOUT = 0xff;
P74OUT = 0xff;
}
//-----------------------------------------------------------------------------
// Timer3_Init
//-----------------------------------------------------------------------------
//
// Configure Timer3 to auto-reload at interval specified by <counts> (no
// interrupt generated) using SYSCLK as its time base.
//
void Timer3_Init (int counts)
{
TMR3CN = 0x02; // Stop Timer3; Clear TF3;
// use SYSCLK as timebase
TMR3RL = -counts; // Init reload values
TMR3 = 0xffff; // set to reload immediately
EIE2 &= ~0x01; // disable Timer3 interrupts
TMR3CN |= 0x04; // start Timer3
}
//-----------------------------------------------------------------------------
// ADC0_Init
//-----------------------------------------------------------------------------
//
// Configure ADC0 to use Timer3 overflows as conversion source, to
// generate an interrupt on conversion complete, and to use left-justified
// output mode. Enables ADC end of conversion interrupt. Leaves ADC disabled.
// Note: here we also enable low-power tracking mode to ensure that minimum
// tracking times are met when ADC0 channels are changed.
//
void ADC0_Init (void)
{
ADC0CN = 0x44; // ADC0 disabled; low-power tracking
// mode; ADC0 conversions are initiated
// on overflow of Timer3; ADC0 data is
// left-justified
REF0CN = 0x07; // enable temp sensor, on-chip VREF,
// and VREF output buffer
AMX0SL = 0x07; // Select AIN0 as ADC mux output
ADC0CF = (SYSCLK/2500000) << 3; // ADC conversion clock = 2.5MHz
ADC0CF &= ~0x07; // PGA gain = 1
EIE2 |= 0x02; // enable ADC interrupts
ADC0CN |= 0x80;
}
//-----------------------------------------------------------------------------
// Interrupt Service Routines
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// ADC0_ISR
//-----------------------------------------------------------------------------
//
// ADC0 end-of-conversion ISR
// Here we take the ADC0 sample and store it in the global array <result>.
// We also select the next channel to convert.
//
void ADC0_ISR (void) interrupt 15
{
// ADC0 sample counter高低电平
AD0INT = 0; // clear ADC conversion complete
result1[num_samples] = ADC0; // read ADC value
num_samples++;
if(num_samples>=ctime)
{
num_samples=0;
tranover=1;
EA = 0;
}
}
//=================================================
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