ADS7816 STC12C5A60S2驱动

/***********STC12C5A60S2 12MHZ ***************/
#include<reg52.h>
#include <intrins.h>
#include"1602.h"
#define uchar unsigned char
#define uint unsigned int
sbit led=P1^0;
sbit DCLK=P2^1;
sbit Dout=P2^2;
sbit CE= P2^3;

uchar code display[]={'0','1','2','3','4','5','6','7','8','9'};
 void init() //AD初始化
{
    DCLK=1;
    Dout=1;
    CE=1;
}

unsigned int readADS()         //读取AD值，SPI
{
    unsigned int back_up=0;
    unsigned char i=0;
    bit data1=0;
    Dout=1;

    DCLK=0;
    delay2us();
    delay2us();

    CE=1;
    delay2us();
    delay2us();
    CE=0;
    //sample
    DCLK=1;
    delay2us();
    delay2us();

    DCLK=0;
    delay2us();
    delay2us();
    DCLK=1;
    delay2us();
    delay2us();

    DCLK=0;
    delay2us();
    delay2us();
    DCLK=1;
    delay2us();
    delay2us();

    for(i=0;i<12;i++)
    {

        DCLK=0;
        delay2us();
        data1=Dout;     //read data
        if(data1)
        {
              back_up|=(0x0800>>i);
        }
        DCLK=1;
        delay2us();

    }
    CE=1;     //close transfer
    return back_up;
}

void main()
{
unsigned long int temp=0;
unsigned long int ad=0;
unsigned char wa=0,qi=0,ba=0,sh=0,ge=0;
    LCD_init();
    LCD_cls();
    init();
     ad=readADS();
     LCD_write_string(0,0,"FRE:00.00000 MHz");
while(1)
    {
    delay(1);
    led=0;
    delay(1);

    led=1;
    delay(1);

    ad=readADS();
    wa=ad/10000;
    qi=ad%10000/1000;
    ba=ad%10000%1000/100;
    sh=ad%10000%1000%100/10;
    ge=ad%10000%1000%100%10/1;
    LCD_write_char(0,1,display[wa]); //显示二进制对于十进制
    LCD_write_char(1,1,display[qi]);
      LCD_write_char(2,1,display[ba]);
    LCD_write_char(3,1,display[sh]);
    LCD_write_char(4,1,display[ge]);
    temp=ad*1221;
    LCD_write_char(6,1,display[temp/1000000]);
    LCD_write_char(7,1,'.');
    LCD_write_char(8,1,display[temp%1000000/100000]);
    LCD_write_char(9,1,display[temp%1000000%100000/10000]);
    LCD_write_char(10,1,display[temp%1000000%100000%10000/1000]);
    LCD_write_char(11,1,display[temp%1000000%100000%10000%1000/100]);
    LCD_write_char(12,1,display[temp%1000000%100000%10000%1000%100/10]);
    LCD_write_char(13,1,display[temp%1000000%100000%10000%1000%100%10/1]);
    LCD_write_char(14,1,' ');
    LCD_write_char(15,1,'V');
    }
}


sbit LCD_DB4= P0^4;
sbit LCD_DB5= P0^5;
sbit LCD_DB6= P0^6;
sbit LCD_DB7= P0^7; // 四线数据传输
sbit LCD1602_RS=P2^0;
sbit LCD1602_RW=P3^7;//实际上没有读LCM,RW脚可以直接接地
sbit LCD1602_EN=P3^6;


void LCD_write_char( unsigned x,unsigned char y,unsigned char dat);    //在指定位置显示字符
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);//在指定位置显示字符串
void LCD_cls(void);//清屏
void LCD_en_command(unsigned char command);
void LCD_en_dat(unsigned char temp);
void LCD_set_xy( unsigned char x, unsigned char y );
void LCD_init(void);
void SET_LCD(unsigned char IO_temp);

void lcddelay(void);

unsigned char LCDIO;

void delay(unsigned int z) //延时Z MS子函数     //MCU STC12C5A60S2 12MHZ
{
    unsigned int x,y;
    for(x=z;x>0;x--)
        for(y=915;y>0;y--);
}

void delay2us()
{
    _nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();
}
void LCD_cls(void)
{
    LCD_en_command(0x01);     //清屏指令
    delay(2);
}

void LCD_en_command(unsigned char command) //指令使能
{
    LCD1602_RS=0; //命令选择开启
    LCD1602_RW=0; //写入模式
    LCD1602_EN=0; //使能初始

    LCDIO=(command & 0xf0);//写入高四位数据命令开启
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    delay(5);
    LCD1602_EN=0; //关闭使能

    LCDIO=(command & 0x0f)<<4; //写入低四位数据命令开启，送至高四位写入
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    delay(5);//
    LCD1602_EN=0;
}

void SET_LCD(unsigned char IO_temp)        //四位I/O口定义
{
    LCD_DB7=IO_temp&0x80;
    LCD_DB6=IO_temp&0x40;
    LCD_DB5=IO_temp&0x20;
    LCD_DB4=IO_temp&0x10;
}

void LCD_en_dat(unsigned char dat)     //数据写入驱动
{
    LCD1602_RS=1;
    LCD1602_RW=0;
    LCD1602_EN=0;

    LCDIO=(dat & 0xf0);
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    delay(5);//    时间太短写不进去
    LCD1602_EN=0;

    LCDIO=(dat & 0x0f)<<4;
    SET_LCD(LCDIO);
    LCD1602_EN=1;
    delay(5);//
    LCD1602_EN=0;
}

void LCD_set_xy( unsigned char x, unsigned char y ) //行选择
{
    unsigned char address;
    if (y ==0)
        address = 0x80 + x;
    else
        address = 0xC0 + x;
        LCD_en_command(address);
}

void LCD_write_char( unsigned x,unsigned char y,unsigned char dat) //字符写入
{
    LCD_set_xy( x, y );
    LCD_en_dat(dat);
}

void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)     //字符串写入
{
    LCD_set_xy( X, Y ); //set address
    while (*s) // write character
    {
        LCDIO=*s;
        SET_LCD(LCDIO);
        LCD_en_dat(*s);
        s ++;
    }
}

void LCD_init(void) //1602初始化
{
    LCD_en_command(0x33);
    delay(20);
    LCD_en_command(0x32);
    delay(20);
    LCD_en_command(0x08);
    delay(5);
    LCD_en_command(0x01);
    delay(5);
    LCD_en_command(0x06);
    delay(5);
    LCD_en_command(0x0c);
    delay(5);
}