iic.c
/* # I2C代码片段说明
1. 本文件夹中提供的驱动代码供参赛选手完成程序设计参考。
2. 参赛选手可以自行编写相关代码或以该代码为基础,根据所选单片机类型、运行速度和试题
中对单片机时钟频率的要求,进行代码调试和修改。
*/
#include <STC15F2K60S2.H>
#include "iic.h"
#include "intrins.h"
sbit scl = P2^0;
sbit sda = P2^1;
#define DELAY_TIME 5
//
static void I2C_Delay(unsigned char n)
{
do
{
_nop_();_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();_nop_();
}
while(n--);
}
//
void I2CStart(void)
{
sda = 1;
scl = 1;
I2C_Delay(DELAY_TIME);
sda = 0;
I2C_Delay(DELAY_TIME);
scl = 0;
}
//
void I2CStop(void)
{
sda = 0;
scl = 1;
I2C_Delay(DELAY_TIME);
sda = 1;
I2C_Delay(DELAY_TIME);
}
//
void I2CSendByte(unsigned char byt)
{
unsigned char i;
for(i=0; i<8; i++){
scl = 0;
I2C_Delay(DELAY_TIME);
if(byt & 0x80){
sda = 1;
}
else{
sda = 0;
}
I2C_Delay(DELAY_TIME);
scl = 1;
byt <<= 1;
I2C_Delay(DELAY_TIME);
}
scl = 0;
}
//
unsigned char I2CReceiveByte(void)
{
unsigned char da;
unsigned char i;
for(i=0;i<8;i++){
scl = 1;
I2C_Delay(DELAY_TIME);
da <<= 1;
if(sda)
da |= 0x01;
scl = 0;
I2C_Delay(DELAY_TIME);
}
return da;
}
//
unsigned char I2CWaitAck(void)
{
unsigned char ackbit;
scl = 1;
I2C_Delay(DELAY_TIME);
ackbit = sda;
scl = 0;
I2C_Delay(DELAY_TIME);
return ackbit;
}
//
void I2CSendAck(unsigned char ackbit)
{
scl = 0;
sda = ackbit;
I2C_Delay(DELAY_TIME);
scl = 1;
I2C_Delay(DELAY_TIME);
scl = 0;
sda = 1;
I2C_Delay(DELAY_TIME);
}
unsigned int Read_PCF8591()
{
unsigned int temp;
I2CStart();
I2CSendByte(0x90);
I2CWaitAck();
I2CSendByte(0x03);
I2CWaitAck();
I2CStart();
I2CSendByte(0x91);
I2CWaitAck();
temp = I2CReceiveByte();
I2CSendAck(1);
I2CStop();
return temp;
}
void Write_AT24C02_Page(unsigned char *buf,unsigned char num)
{
I2CStart();
I2CSendByte(0xa0);
I2CWaitAck();
I2CSendByte(0x00);
I2CWaitAck();
while(num--)
{
I2CSendByte(*buf++);
I2CWaitAck();
}
I2CStop();
}
void Read_AT24C02_Page(unsigned char *buf,unsigned char num)
{
I2CStart();
I2CSendByte(0xa0);
I2CWaitAck();
I2CSendByte(0x00);
I2CWaitAck();
I2CStart();
I2CSendByte(0xa1);
I2CWaitAck();
while(num--)
{
*buf++ = I2CReceiveByte();
if(num) I2CSendAck(0);
else I2CSendAck(1);
}
I2CStop();
}
iic.h
#ifndef __iic_h
#define __iic_h
static void I2C_Delay(unsigned char n);
void I2CStart(void);
void I2CStop(void);
void I2CSendByte(unsigned char byt);
unsigned char I2CReceiveByte(void);
unsigned char I2CWaitAck(void);
void I2CSendAck(unsigned char ackbit);
unsigned int Read_PCF8591();
void Write_AT24C02_Page(unsigned char *buf,unsigned char num);
void Read_AT24C02_Page(unsigned char *buf,unsigned char num);
#endif
onewire.c
/* # 单总线代码片段说明
1. 本文件夹中提供的驱动代码供参赛选手完成程序设计参考。
2. 参赛选手可以自行编写相关代码或以该代码为基础,根据所选单片机类型、运行速度和试题
中对单片机时钟频率的要求,进行代码调试和修改。
*/
//
#include <STC15F2K60S2.H>
#include "onewire.h"
sbit DQ = P1^4;
void Delay_OneWire(unsigned int t)
{
unsigned char i;
while(t--){
for(i=0;i<12;i++);
}
}
//
void Write_DS18B20(unsigned char dat)
{
unsigned char i;
for(i=0;i<8;i++)
{
DQ = 0;
DQ = dat&0x01;
Delay_OneWire(5);
DQ = 1;
dat >>= 1;
}
Delay_OneWire(5);
}
//
unsigned char Read_DS18B20(void)
{
unsigned char i;
unsigned char dat;
for(i=0;i<8;i++)
{
DQ = 0;
dat >>= 1;
DQ = 1;
if(DQ)
{
dat |= 0x80;
}
Delay_OneWire(5);
}
return dat;
}
//
bit init_ds18b20(void)
{
bit initflag = 0;
DQ = 1;
Delay_OneWire(12);
DQ = 0;
Delay_OneWire(80);
DQ = 1;
Delay_OneWire(10);
initflag = DQ;
Delay_OneWire(5);
return initflag;
}
unsigned int Read_Temp()
{
unsigned int temp;
unsigned char LSB,MSB;
init_ds18b20();
Write_DS18B20(0xcc);
Write_DS18B20(0x44);
init_ds18b20();
Write_DS18B20(0xcc);
Write_DS18B20(0xbe);
LSB = Read_DS18B20();
MSB = Read_DS18B20();
temp = MSB << 8 | LSB;
return temp * 6.25;
}
onewire.h
#ifndef __onewire_h
#define __onewire_h
void Delay_OneWire(unsigned int t);
void Write_DS18B20(unsigned char dat);
unsigned char Read_DS18B20(void);
bit init_ds18b20(void);
unsigned int Read_Temp();
#endif
sys.c
#include <STC15F2K60S2.H>
#include "sys.h"
void Delay_ms(unsigned int t) //@12.000MHz
{
while(t--)
{
unsigned char i, j;
i = 12;
j = 169;
do
{
while (--j);
} while (--i);
}
}
void Select_Hc573(char n)
{
switch(n)
{
case 4:P2 = P2 & 0x1f | 0x80;break;
case 5:P2 = P2 & 0x1f | 0xa0;break;
case 6:P2 = P2 & 0x1f | 0xc0;break;
case 7:P2 = P2 & 0x1f | 0xe0;break;
}
P2 = P2 & 0x1f;
}
void Sys_Init()
{
P0 = 0x00;
Select_Hc573(5);
P0 = 0xff;
Select_Hc573(4);
}
void Select_Bit(unsigned char pos,dat)
{
P0 = 0x01 << pos;
Select_Hc573(6);
P0 = dat;
Select_Hc573(7);
Delay_ms(1);
P0 = 0xff;
Select_Hc573(7);
}
sys.h
#ifndef __sys_h
#define __sys_h
void Delay_ms(unsigned int t);
void Select_Hc573(char n);
void Sys_Init();
void Select_Bit(unsigned char pos,dat);
#endif
main.c
#include <STC15F2K60S2.H>
#include "iic.h"
#include "onewire.h"
#include "sys.h"
sbit S7 = P3^0;
sbit S6 = P3^1;
sbit S5 = P3^2;
sbit S4 = P3^3;
code unsigned char SMG[] = { ~0x3F,~0x06,~0x5B,~0x4F,~0x66,~0x6D,~0x7D,~0x07,~0x7F,~0x6F};
unsigned char Echo[10];
unsigned char Echo_temp[10];
unsigned int Temp;//温度 0-9999
unsigned int V;//电压 0-50
unsigned int Fre;//频率 0-65535
char V_yuzhi = 10;//电压阈值
char old_yuzhi = 10;
unsigned char Mode;//大界面切换 0-数据界面 1-回显界面 2-电压阈值设置界面
unsigned char Dat_Mode;//数据界面切换 0-温度 1-电压 2-频率
unsigned char Echo_Mode;//回显界面切换 0-温度 1-电压 2-频率
unsigned char count1,count2,count3,count4;
bit flag_10ms,flag_800ms,ok,flag,flag_200ms;
void Timer1Init(void) //10毫秒@12.000MHz
{
AUXR &= 0xBF; //定时器时钟12T模式
TMOD = 0x05; //设置定时器模式
TL1 = 0xF0; //设置定时初值
TH1 = 0xD8; //设置定时初值
TH0 = TL0 = 0;
TF1 = 0; //清除TF1标志
TR0 = TR1 = 1; //定时器1开始计时
ET0 = ET1 = 1;
EA = 1;
}
void Timer1_isr() interrupt 3
{
flag_10ms = 1;
if(++count1 > 100)
{
count1 = 0;
Fre = TH0 << 8 | TL0;
TH0 = TL0 = 0;
}
if(++count2 > 50)
{
count2 = 0;
if(flag_800ms)
{
// flag = 1;
if(++V_yuzhi > 50) V_yuzhi = 50;
}
}
if(++count3 > 50)//每隔半秒进来查看
{
count3 = 0;
if(Mode == 2)//界面2下
{
if(old_yuzhi != V_yuzhi)//半秒内不等于的话就刷新一次old_yuzhi,且不能返回数据界面
{
old_yuzhi = V_yuzhi;//刷新一次
ok = 0;// 0-不能进入数据界面
}
else
{
ok = 1;// 1-能进入数据界面
}
}
}
if(++count4 > 20)
{
count4 = 0;
if(V > V_yuzhi)
flag_200ms = ~flag_200ms;
}
}
void Display_V()//电压测量显示界面
{
Select_Bit(0,~0x3e);
Select_Bit(6,SMG[V / 10] - 0x80);
Select_Bit(7,SMG[V % 10]);
}
void Display_Fre()//频率界面
{
Select_Bit(0,~0x71);
if(Fre > 9999) Select_Bit(3,SMG[Fre / 10000]);
if(Fre > 999) Select_Bit(4,SMG[Fre / 1000 % 10]);
if(Fre > 99) Select_Bit(5,SMG[Fre / 100 % 10]);
if(Fre > 9) Select_Bit(6,SMG[Fre / 10 % 10]);
Select_Bit(7,SMG[Fre % 10]);
}
void Display_Temp()//温度界面
{
Select_Bit(0,~0x39);
Select_Bit(4,SMG[Temp / 1000]);
Select_Bit(5,SMG[Temp / 100 % 10] - 0x80);
Select_Bit(6,SMG[Temp / 10 % 10]);
Select_Bit(7,SMG[Temp % 10]);
}
void Display_Echo()//数据回显界面
{
unsigned int Temp_temp = Echo[0] * 100 + Echo[1];
unsigned int V_temp = Echo[2];
unsigned int Fre_temp = Echo[3] * 10000 + Echo[4] * 100 + Echo[5];
Select_Bit(0,~0x76);
switch(Echo_Mode)
{
case 0://温度
Select_Bit(1,~0x39);
Select_Bit(4,SMG[Temp_temp / 1000]);
Select_Bit(5,SMG[Temp_temp / 100 % 10] - 0x80);
Select_Bit(6,SMG[Temp_temp / 10 % 10]);
Select_Bit(7,SMG[Temp_temp % 10]);
break;
case 1://电压
Select_Bit(1,~0x3e);
Select_Bit(6,SMG[V_temp / 10] - 0x80);
Select_Bit(7,SMG[V_temp % 10]);
break;
case 2://频率
Select_Bit(1,~0x71);
if(Fre_temp > 9999) Select_Bit(3,SMG[Fre_temp / 10000]);
if(Fre_temp > 999) Select_Bit(4,SMG[Fre_temp / 1000 % 10]);
if(Fre_temp > 99) Select_Bit(5,SMG[Fre_temp / 100 % 10]);
if(Fre_temp > 9) Select_Bit(6,SMG[Fre_temp / 10 % 10]);
Select_Bit(7,SMG[Fre_temp % 10]);
break;
}
}
void Display_V_yuzhi()//电压阈值设置界面
{
Select_Bit(0,~0x73);
Select_Bit(6,SMG[V_yuzhi / 10] - 0x80);
Select_Bit(7,SMG[V_yuzhi % 10]);
}
void Key_Scan()
{
static unsigned char cnt4 = 0;
static unsigned char cnt5 = 0;
static unsigned char cnt6 = 0;
static unsigned int cnt7 = 0;
if(flag_10ms)
{
if(S7 == 0) cnt7++;
if(S7 == 1)
{
if(cnt7 > 2)
{
Mode = 2;
if(ok)
{
Mode = 0;
ok = 0;
}
}
cnt7 = 0;
}
if(S6 == 0)
{
cnt6++;
if(cnt6 > 80) flag_800ms = 1;
}
if(S6 == 1)
{
flag_800ms = 0;
if(cnt6 > 2)
{
if(Mode == 2)
{
if(++V_yuzhi > 50)
{
V_yuzhi = 50;
}
}
else
{
Mode = 1;
Read_AT24C02_Page(Echo,6);
}
}
cnt6 = 0;
}
if(S5 == 0) cnt5++;
if(S5 == 1)
{
if(cnt5 > 2)
{
Echo_temp[0] = Temp / 100;Echo_temp[1] = Temp % 100;
Echo_temp[2] = V;
Echo_temp[3] = Fre / 10000;Echo_temp[4] = Fre / 100 % 100;Echo_temp[5] = Fre % 100;
Write_AT24C02_Page(Echo_temp,6);
}
cnt5 = 0;
}
if(S4 == 0) cnt4++;
if(S4 == 1)
{
if(cnt4 > 2)
{
if(!Mode)
{
if(++Dat_Mode > 2) Dat_Mode = 0;
}
else if(Mode == 1)
{
if(++Echo_Mode > 2) Echo_Mode = 0;
}
}
cnt4 = 0;
}
flag_10ms = 0;
}
}
void Led(unsigned char addr,enable)
{
static unsigned char temp = 0x00;
static unsigned char temp_old = 0xff;
if(enable) temp |= 0x01 << addr;
else temp &= ~(0x01 << addr);
if(temp != temp_old)
{
P0 = ~temp;
Select_Hc573(4);
temp_old = temp;
}
}
void Led_Pro()
{
if(Mode == 0 && Dat_Mode == 0) Led(0,1);
else Led(0,0);
if(Mode == 0 && Dat_Mode == 2) Led(1,1);
else Led(1,0);
if(Mode == 0 && Dat_Mode == 1) Led(2,1);
else Led(2,0);
if(flag_200ms) Led(7,1);
else Led(7,0);
}
void main()
{
Sys_Init();
Timer1Init();
Read_Temp();
Delay_ms(750);
Read_AT24C02_Page(Echo,6);
while(1)
{
V = Read_PCF8591() / 51.0 * 10;
Temp = Read_Temp();
Key_Scan();
switch(Mode)
{
case 0:
switch(Dat_Mode)
{
case 0:Display_Temp();break;
case 1:Display_V();break;
case 2:Display_Fre();break;
}
break;
case 1:Display_Echo();break;
case 2:Display_V_yuzhi();break;
}
Led_Pro();
}
}