蓝桥杯比赛中常用的模块代码

1万 · 2018-1-29 17:03

本帖最后由一路向北lm 于 2018-1-29 17:05 编辑

1.AT24C02  iic

#include <stc15f2k60s2.h>
#include "intrins.h"

sbit scl = P2^0;
sbit sda = P2^1;
void Snop()             //@11.0592MHz
{
      unsigned char i;

      _nop_();
      i = 11;
      while (--i);
}

void i2c_start(void)
{
sda = 1;
scl = 1;
Snop();
sda = 0;
Snop();
scl = 0;
}

void i2c_stop(void)
{
sda = 0;
scl = 1;
Snop();
sda = 1;
Snop();
}

void i2c_sendbyte(unsigned char byt)
{
unsigned char i;
//
      EA = 0;
for(i=0; i<8; i++){
      scl = 0;
      Snop();
      if(byt & 0x80){
         sda = 1;
      }
      else{
         sda = 0;
      }
      Snop();
      scl = 1;
      byt <<= 1;
      Snop();
}
      EA = 1;
//
scl = 0;
}

unsigned char i2c_waitack(void)
{
      unsigned char ackbit;

scl = 1;
Snop();
ackbit = sda; //while(sda);  //wait ack
scl = 0;
Snop();

      return ackbit;
}

unsigned char i2c_receivebyte(void)
{
      unsigned char da;
      unsigned char i;
//
      EA = 0;
      for(i=0;i<8;i++){
            scl = 1;
            Snop();
            da <<= 1;
            if(sda)
                     da |= 0x01;
            scl = 0;
            Snop();
      }
      EA = 1;
//
      return da;
}

void i2c_sendack(unsigned char ackbit)
{
scl = 0;
sda = ackbit;  //0：发送应答信号；1：发送非应答信号
scl = 1;
Snop();
scl = 0;
Snop();
}

void delay1ms(unsigned char t)
{
      unsigned char i;

      while(t--){
            for(i=0; i<112; i++);
      }
}

void iic_write(unsigned char add,unsigned char dat)
{
i2c_start();
i2c_sendbyte(0xa0);
i2c_waitack();
i2c_sendbyte(add);
i2c_waitack();
i2c_sendbyte(dat);
i2c_waitack();
i2c_stop();
      delay1ms(30);
}

unsigned char iic_read(unsigned char add)
{
      unsigned char da;

      i2c_start();
      i2c_sendbyte(0xa0);
      i2c_waitack();
      i2c_sendbyte(add);
      i2c_waitack();
      i2c_start();
      i2c_sendbyte(0xa1);
      i2c_waitack();
      da = i2c_receivebyte();
      i2c_sendack(1);
      i2c_stop();

      return da;
}

#ifndef _I2C_H_
#define _I2C_H_
void delay1ms(unsigned char t);
void iic_write(unsigned char add,unsigned char dat);
unsigned char iic_read(unsigned char add);
#endif

1万 · 2018-1-29 17:07

本帖最后由一路向北lm 于 2018-1-29 18:45 编辑

IIC PCF8591 ADC

#include<stc15f2k60s2.h>
#include"smg.h"
#include"i2c.h"
#include"ct107d.h"
extern void ConfigUART(unsigned int baud);
bit adcflag=0;
extern unsigned int key_sta;
void init_pcf8591()
{
  iic_start();
  iic_writebyte(0x90);
  iic_waitack();
  iic_writebyte(0x01);
  iic_waitack();
  iic_stop();
  delay1ms(10);
}
void main()
{
      EA=1;
      buzz_off();
      motor_off();
      led_off();
      Time_0_1ms();
      init_pcf8591();
      ConfigUART(115200);
      EX0=1;
      IT0=1;
      while(1)
      {
            if(adcflag)
            {
                     adcflag=0;
                     key_sta=(int)(adc_pcf8591()*100)/255*5;
            }
      }
}
void interruptTime0() interrupt 1
{
      unsigned char i;
      i++;
      if(i==80)
      {
            i=0;
            adcflag=1;
      }
      smg_8();
      smg_buff();
}
void interruptUART() interrupt 4
{
      if(RI)
      {
            RI=0;
            SBUF=key_sta;
      }
      if(TI)
      TI=0;
}
void interruptEX0() interrupt 0
{
      RI=1;

}

1万 · 2018-1-29 18:46

PCF8591  DAC
#include<stc15f2k60s2.h>
#include<intrins.h>
sbit sda=P2^1;
sbit scl=P2^0;
void Snop()
{
unsigned char i;

      _nop_();
      i = 11;
      while (--i);
}
void delay1ms(unsigned char t)
{
      unsigned char i;
      while(t--)
      {
         for(i=0;i<112;i++);
      }
}

void iic_start()
{
      sda=0;
      scl=1;
      sda=1;
      Snop();
      sda=0;
      Snop();
      scl=0;

}
void iic_stop()
{
      sda=0;
      scl=0;
      scl=1;
      Snop();
      sda=1;
      scl=0;
}
void iic_ack()
{
      sda=1;
      Snop();
      scl=1;
      Snop();
      scl=0;
}
void iic_nack(bit ackbit)
{
      if(ackbit)
            sda=1;
      else
            sda=0;
      Snop();
      scl=1;
      Snop();
      scl=0;
      sda=1;
      Snop();
}
void iic_writebyte(unsigned char da)
{
      unsigned char i;
      for(i=0;i<8;i++)
      {

            if(da&0x80)
                     sda=1;
            else
                     sda=0;
            Snop();
            scl=1;
            Snop();
            scl=0;
            da<<=1;

      }
}
unsigned char iic_readbyte()
{
      unsigned char i,dat;
      for(i=0;i<8;i++)
      {

            dat<<=1;
            scl=1;
            Snop();
            dat|=sda;
            scl=0;
            Snop();
      }
      return dat;
}
void at24c02_write(unsigned char add,unsigned char dat)

{
      iic_start();
      iic_writebyte(0xa0);
      iic_ack();
      iic_writebyte(add);
      iic_ack();
      iic_writebyte(dat);
      iic_ack();
      iic_stop();
      delay1ms(30);
}
unsigned char at24c02_read(unsigned char add)
{
      unsigned char da;
      iic_start();
      iic_writebyte(0xa0);
      iic_ack();
      iic_writebyte(add);
      iic_ack();
      iic_start();
      iic_writebyte(0xa1);
      iic_ack();
      da=iic_readbyte();
      iic_nack(1);
      iic_stop();
      return da;
}
void dac_write()
{
      iic_start();
      iic_writebyte(0x90);
      iic_ack();
      iic_writebyte(0x40);
      iic_ack();
}

#ifndef       _DAC_H_
#define _DAC_H_
unsigned char at24c02_read(unsigned char add);
void at24c02_write(unsigned char add,unsigned char dat);
void dac_write();
void iic_writebyte(unsigned char da);
void delay1ms(unsigned char t);
void iic_ack();
#endif

1万 · 2018-1-29 18:52

本帖最后由一路向北lm 于 2018-1-29 19:01 编辑

//DS18B20 温度传感器
#include<stc15f2k60s2.h>
#include<intrins.h>
sbit dq=P1^4;
void Delay500ms()             //@11.0592MHz
{
      unsigned char i, j, k;

      _nop_();
      _nop_();
      i = 22;
      j = 3;
      k = 227;
      do
      {
            do
            {
                     while (--k);
            } while (--j);
      } while (--i);
}
void Delay500us()             //@11.0592MHz
{
      unsigned char i, j;

      _nop_();
      _nop_();
      i = 6;
      j = 93;
      do
      {
            while (--j);
      } while (--i);
}

void Delay120us()             //@11.0592MHz
{
      unsigned char i, j;

      _nop_();
      _nop_();
      _nop_();
      i = 2;
      j = 70;
      do
      {
            while (--j);
      } while (--i);
}
void Delay60us()             //@11.0592MHz
{
      unsigned char i, j;

      i = 1;
      j = 162;
      do
      {
            while (--j);
      } while (--i);
}
void Delay45us()             //@11.0592MHz
{
      unsigned char i;

      i = 122;
      while (--i);
}

void Delay15us()             //@11.0592MHz
{
      unsigned char i;

      i = 39;
      while (--i);
}

void Delay1us()             //@11.0592MHz
{
      _nop_();
      _nop_();
      _nop_();
}

bit int_ds18b20()
{
      bit ack;
      EA=0;
      dq=1;
      dq=0;
      Delay500us();
      dq=1;
      Delay120us();
      ack=dq;
      while(!dq);
      EA=1;
      return ack;
}
void write_ds18b20(unsigned char byte)
{
      unsigned char i;
      EA=0;
      for(i=0;i<8;i++)
      {
            dq=0;
            dq=byte&0x01;
            Delay60us();
            byte>>=1;
            dq=1;
            Delay1us();
      }
      EA=1;
}
unsigned char read_ds18b20()
{
      unsigned char i,dat;
      EA=0;
      for(i=0;i<8;i++)
      {
            dq=0;
            dat>>=1;
            Delay1us();
            dq=1;
            Delay15us();
            if(dq)dat|=0x80;
            Delay45us();
      }
      EA=1;
      return dat;
}
void read_temp18b20(int *temp)
{
      unsigned char low,high;

      int_ds18b20();
      write_ds18b20(0xcc);
      write_ds18b20(0x44);
      Delay500ms();
      int_ds18b20();
      write_ds18b20(0xcc);
      write_ds18b20(0xbe);
      low=read_ds18b20();
      high=read_ds18b20();
      *temp=(int)(high<<8)+low;
}

1万 · 2018-1-29 18:59

本帖最后由一路向北lm 于 2018-1-29 19:00 编辑

LCD1602
#include <stc15f2k60s2.h>
#define LCD1602_DB P0
sbit LCD1602_RS = P2^0;
sbit LCD1602_RW = P2^1;
sbit LCD1602_E  = P1^2;
void LcdWaitReady()
{
unsigned char sta;
LCD1602_DB = 0xFF;
LCD1602_RS = 0;
LCD1602_RW = 1;
do {
      LCD1602_E = 1;
      sta = LCD1602_DB; //读取状态字
      LCD1602_E = 0;
} while (sta & 0x80); //bit7等于1表示液晶正忙，重复检测直到其等于0为止
}
/* 向LCD1602液晶写入一字节命令，cmd-待写入命令值 */
void LcdWriteCmd(unsigned char cmd)
{
LcdWaitReady();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_E  = 1;
LCD1602_E  = 0;
}
/* 向LCD1602液晶写入一字节数据，dat-待写入数据值 */
void LcdWriteDat(unsigned char dat)
{
LcdWaitReady();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_E  = 1;
LCD1602_E  = 0;
}
/* 设置显示RAM起始地址，亦即光标位置，(x,y)-对应屏幕上的字符坐标 */
void LcdSetCursor(unsigned char x, unsigned char y)
{
unsigned char addr;

if (y == 0)  //由输入的屏幕坐标计算显示RAM的地址
      addr = 0x00 + x;  //第一行字符地址从0x00起始
else
      addr = 0x40 + x;  //第二行字符地址从0x40起始
LcdWriteCmd(addr | 0x80);  //设置RAM地址
}
/* 在液晶上显示字符串，(x,y)-对应屏幕上的起始坐标，
str-字符串指针，len-需显示的字符长度 */
void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str, unsigned char len)
{
LcdSetCursor(x, y); //设置起始地址
while (len--)       //连续写入len个字符数据
{
      LcdWriteDat(*str++);  //先取str指向的数据，然后str自加1
}
}
/* 初始化1602液晶 */
void InitLcd1602()
{
LcdWriteCmd(0x38);  //16*2显示，5*7点阵，8位数据接口
LcdWriteCmd(0x0C);  //显示器开，光标关闭
LcdWriteCmd(0x06);  //文字不动，地址自动+1
LcdWriteCmd(0x01);  //清屏
}

1万 · 2018-1-29 19:18

串口
#include<stc15f2k60s2.h>
#include"i2c.h"
extern unsigned char iic_n,iic_add;
extern bit flag_read;
void ConfigUART(unsigned int baud)
{
SCON=0x50;
AUXR|=0x10;
T2L=(65536-(11059200/4/12)/baud);
T2H=(65536-(11059200/12/4)/baud)>>8;
ES=1;
}
void uart_writeByte(unsigned char dat)
{
SBUF=dat;
while(!TI);
TI=0;
}
void uart_write(unsigned char dat)//转化字符形式发送
{
unsigned char j;
unsigned char dat3[4];

dat3[0]=dat/100%10;
dat3[1]=dat/10%10;
dat3[2]=dat%10;
dat3[3]=',';

for(j=0;j<4;j++)
{
switch(dat3[j])
{
case 0:uart_writeByte('0');break;
case 1:uart_writeByte('1');break;
case 2:uart_writeByte('2');break;
case 3:uart_writeByte('3');break;
case 4:uart_writeByte('4');break;
case 5:uart_writeByte('5');break;
case 6:uart_writeByte('6');break;
case 7:uart_writeByte('7');break;
case 8:uart_writeByte('8');break;
case 9:uart_writeByte('9');break;
case ',':uart_writeByte(',');break;
default:break;
}
}
}
void uart_read(unsigned char da)
{
unsigned char dat3[3];
static unsigned char i,k,dat,add;
static bit tempread,tempwirte;
switch(da)
{
case '0':dat3=0;i++;break;
case '1':dat3=1;i++;break;
case '2':dat3=2;i++;break;
case '3':dat3=3;i++;break;
case '4':dat3=4;i++;break;
case '5':dat3=5;i++;break;
case '6':dat3=6;i++;break;
case '7':dat3=7;i++;break;
case '8':dat3=8;i++;break;
case '9':dat3=9;i++;break;
case '-':tempread=1;break;
case '+':tempwirte=1;break;
default:break;
}
if(i==3&&tempwirte==1)
{

dat=dat3[0]*100+dat3[1]*10+dat3[2];
if(k==0)
add=dat;
k=2;
if(k==2)
iic_write(add,dat);
add++;
tempwirte=0;
i=0;
}
if(i==3&&tempread==1)
   {
     dat=dat3[0]*100+dat3[1]*10+dat3[2];

if(k==2)
iic_add=dat;
k=0;
if(k==0)
{
   iic_n=dat;
}

flag_read=tempread;
tempread=0;
i=0;

   }

}