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 char Read_v()
{
unsigned int temp;
I2CStart();
I2CSendByte(0x90);
I2CWaitAck();
I2CSendByte(0x41);
I2CWaitAck();
I2CStart();
I2CSendByte(0x91);
I2CWaitAck();
temp = I2CReceiveByte();
I2CSendAck(1);
I2CStop();
return temp;
}
void Write_v(unsigned char dat)
{
I2CStart();
I2CSendByte(0x90);
I2CWaitAck();
I2CSendByte(0x40);
I2CWaitAck();
I2CSendByte(dat);
I2CWaitAck();
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 char Read_v();
void Write_v(unsigned char dat);
#endifds1302.c
/* # DS1302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 "ds1302.h"
#include "intrins.h"
sbit SCK = P1^7;
sbit SDA = P2^3;
sbit RST = P1^3;
code unsigned char Write_addr[] = {0x80,0x82,0x84,0x86,0x88,0x8a,0x8c};
code unsigned char Read_addr[] = {0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};
unsigned char time[] = {0x01,0x20,0x20};
void Write_Ds1302(unsigned char temp)
{
unsigned char i;
for (i=0;i<8;i++)
{
SCK = 0;
SDA = temp&0x01;
temp>>=1;
SCK=1;
}
}
//
void Write_Ds1302_Byte( unsigned char address,unsigned char dat )
{
RST=0; _nop_();
SCK=0; _nop_();
RST=1; _nop_();
Write_Ds1302(address);
Write_Ds1302(dat);
RST=0;
}
//
unsigned char Read_Ds1302_Byte ( unsigned char address )
{
unsigned char i,temp=0x00;
RST=0; _nop_();
SCK=0; _nop_();
RST=1; _nop_();
Write_Ds1302(address);
for (i=0;i<8;i++)
{
SCK=0;
temp>>=1;
if(SDA)
temp|=0x80;
SCK=1;
}
RST=0; _nop_();
SCK=0; _nop_();
SCK=1; _nop_();
SDA=0; _nop_();
SDA=1; _nop_();
return (temp);
}
void Write_time()
{
char i;
Write_Ds1302_Byte(0x8e,0x00);
for(i = 0;i < 3;i++)
Write_Ds1302_Byte(Write_addr[i],time[i]);
Write_Ds1302_Byte(0x8e,0x80);
}
void Read_time()
{
char i;
for(i = 0;i < 3;i++)
time[i] = Read_Ds1302_Byte(Read_addr[i]);
}
ds1302.h
#ifndef __ds1302_h
#define __ds1302_h
void Write_Ds1302(unsigned char temp);
void Write_Ds1302_Byte( unsigned char address,unsigned char dat );
unsigned char Read_Ds1302_Byte ( unsigned char address );
void Write_time();
void Read_time();
#endifsys.c
#include <STC15F2K60S2.H>
#include "sys.h"
#include "intrins.h"
void Delay12us() //@12.000MHz
{
unsigned char i;
_nop_();
_nop_();
i = 33;
while (--i);
}
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 Delay12us();
void Delay_ms(unsigned int t) ;
void Select_Hc573(char n);
void Sys_Init();
void Select_Bit(unsigned char pos,dat);
#endifmain.c
#include <STC15F2K60S2.H>
#include "ds1302.h"
#include "iic.h"
#include "sys.h"
#include "stdio.h"
sbit TX = P1^0;
sbit RX = P1^1;
sbit R1 = P3^0;
sbit R2 = P3^1;
sbit R3 = P3^2;
sbit R4 = P3^3;
sbit C1 = P4^4;
sbit C2 = P4^2;
sbit C3 = P3^5;
sbit C4 = P3^4;
code unsigned char SMG[] = { ~0x3F,~0x06,~0x5B,~0x4F,~0x66,~0x6D,~0x7D,~0x07,~0x7F,~0x6F,~0x40,~0x38,~0x39,~0x71,~0x76,0xfe,0xbf,0xf7,~0x73};
unsigned int dis,distance,a;//距离
bit flag,flag_10ms;
unsigned char count;
unsigned int count1,count2;
extern unsigned char time[];
bit mode_dis;//0-触发 1-定时
unsigned char mode_record;// 0-最大值 1-最小值 2-均值
unsigned char dis_max,dis_min = 9;
float dis_sum;
float dis_ave;
char param_time[] = {2,3,5,7,9};
char param_time_P[] = {2,3,5,7,9};
char index;//时间参数索引
char index_P;//时间参数索引
unsigned int dis_index;//距离索引，用于计算平均值
char param_dis = 20;
char param_dis_P = 20;
unsigned char key_val;
bit mode;//0-数据界面 1-参数界面
unsigned char mode_dat;//0-时间 1-距离 2-数据记录
bit mode_param;// 0-时间 1-距离
bit L5_flag;
void PCA_Init()
{
P_SW1 &= 0xcf;
CCON = 0;
CH = CL = 0;
CMOD = 0x01;
CCAPM0 = 0x10;
}
void Send()
{
char i;
for(i = 0;i < 8;i++)
{
TX = 1;
Delay12us();
TX = 0;
Delay12us();
}
CH = CL = 0;
CF = CCF0 = 0;
CCAPM0 |= 0x01;
CR = 1;
}
void PCA_isr() interrupt 7
{
if(CCF0)
{
distance = (CCAP0H << 8 | CCAP0L) * 0.017;
CCF0 = 0;
}
else if(CF)
{
distance = 99;
CF = 0;
}
CCAPM0 &= (~0x01);
CR = 0;
}
void Display_time()//时间界面
{
Select_Bit(0,SMG[time[2] / 16]);
Select_Bit(1,SMG[time[2] % 16]);
Select_Bit(2,SMG[10]);
Select_Bit(3,SMG[time[1] / 16]);
Select_Bit(4,SMG[time[1] % 16]);
Select_Bit(5,SMG[10]);
Select_Bit(6,SMG[time[0] / 16]);
Select_Bit(7,SMG[time[0] % 16]);
}
void Display_dis()//距离界面
{
Select_Bit(0,SMG[11]);
if(!mode_dis) Select_Bit(1,SMG[12]);
else Select_Bit(1,SMG[13]);
if(dis > 99) Select_Bit(5,SMG[dis / 100]);
if(dis > 9) Select_Bit(6,SMG[dis / 10 % 10]);
Select_Bit(7,SMG[dis % 10]);
}
void Display_record()//数据记录界面
{
Select_Bit(0,SMG[14]);
switch(mode_record)
{
case 0:
Select_Bit(1,SMG[15]);
if(dis_max > 99) Select_Bit(5,SMG[dis_max / 100]);
if(dis_max > 9) Select_Bit(6,SMG[dis_max / 10 % 10]);
Select_Bit(7,SMG[dis_max % 10]);
break;
case 1:
Select_Bit(1,SMG[17]);
if(dis_min > 99) Select_Bit(5,SMG[dis_min / 100]);
if(dis_min > 9) Select_Bit(6,SMG[dis_min / 10 % 10]);
Select_Bit(7,SMG[dis_min % 10]);
break;
case 2:
Select_Bit(1,SMG[16]);
if(dis_ave > 99) Select_Bit(4,SMG[((unsigned char)(dis_ave * 10)) / 1000]);
if(dis_ave > 9) Select_Bit(5,SMG[((unsigned char)(dis_ave * 10)) / 100 % 10]);
Select_Bit(6,SMG[((unsigned char)(dis_ave * 10)) / 10 % 10] - 0x80);
Select_Bit(7,SMG[((unsigned char)(dis_ave * 10)) % 10]);
break;
}
}
void Display_param_time()//时间参数界面
{
Select_Bit(0,SMG[18]);
Select_Bit(1,SMG[1]);
Select_Bit(6,SMG[param_time[index] / 10]);
Select_Bit(7,SMG[param_time[index] % 10]);
}
void Display_param_dis()//距离参数界面
{
Select_Bit(0,SMG[18]);
Select_Bit(1,SMG[2]);
Select_Bit(6,SMG[param_dis / 10]);
Select_Bit(7,SMG[param_dis % 10]);
}
void Timer0Init(void) //10毫秒@12.000MHz
{
AUXR &= 0x7F; //定时器时钟12T模式
TMOD &= 0xF0; //设置定时器模式
TL0 = 0xF0; //设置定时初值
TH0 = 0xD8; //设置定时初值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
ET0 = 1;
EA = 1;
}
void Timer0_isr() interrupt 1
{
flag_10ms = 1;
if(mode_dis)//定时模式下
{
count2 = 0;
if(++count1 > param_time_P[index_P] * 100)//距离的刷新时间等于时间参数才刷新一次
{
count1 = 0;
flag = 1;
}
}
else//触发模式下，距离的刷新时间为1秒
{
count1 = 0;
if(++count2 > 100)
{
count2 = 0;
flag = 1;
}
}
}
unsigned char Key_Scan()
{
unsigned char temp = 0;
static unsigned char cnt4 = 0;
static unsigned char cnt5 = 0;
static unsigned char cnt8 = 0;
static unsigned char cnt9 = 0;
if(flag_10ms)
{
R3 = 0;
R1 = R2 = R4 = C1 = C2 = C3 = C4 = 1;
if(C1 == 0) cnt5++;
if(C1 == 1)
{
if(cnt5 > 2) temp = 5;
cnt5 = 0;
}
if(C2 == 0) cnt9++;
if(C2 == 1)
{
if(cnt9 > 2) temp = 9;
cnt9 = 0;
}
R4 = 0;
R1 = R2 = R3 = C1 = C2 = C3 = C4 = 1;
if(C1 == 0) cnt4++;
if(C1 == 1)
{
if(cnt4 > 2) temp = 4;
cnt4 = 0;
}
if(C2 == 0) cnt8++;
if(C2 == 1)
{
if(cnt8 > 2) temp = 8;
cnt8 = 0;
}
flag_10ms = 0;
}
return temp;
}
void Key_Pro()
{
switch(key_val)
{
case 4:
mode ^= 1;
if(!mode) mode_param = 0;
else mode_dat = 0;
break;
case 5:
if(!mode)
{
if(++mode_dat > 2)
mode_dat = 0;
}
else
{
mode_param ^= 1;
}
break;
case 8:
if(!mode)
{
if(mode_dat == 1) mode_dis ^= 1;
if(mode_dat == 2)
{
if(++mode_record > 2)
mode_record = 0;
}
}
break;
case 9:
if(mode)
{
if(!mode_param)
{
if(++index > 4)
index = 0;
}
else
{
param_dis += 10;
if(param_dis > 80)
param_dis = 10;
}
}
break;
}
if(mode_dat == 1)
mode_record = 0;
if(!mode)
{
param_time_P[index_P] = param_time[index];
index_P = index;
param_dis_P = param_dis;
}
}
void Out_dac()//DAC输出
{
if(dis <= 10) Write_v(1 * 51);
else if(dis >= 80) Write_v(5 * 51);
else Write_v((((dis - 10) * 4 / 70.0 + 1)) * 51);
}
void Dis_Pro()//超声波测距
{
if(flag)
{
flag = 0;
a = distance;
if((dis >= (param_dis_P - 5)) && (dis <= (param_dis_P + 5))) count++;
else
{
count = 0;
L5_flag = 0;
}
if(count == 3)
{
L5_flag = 1;
count = 0;
}
}
if(mode_dis)
{
if((time[0] / 16 * 10 + time[0] % 16) % param_time_P[index_P] == 0)
{
dis = a;
dis_index++;
if(dis > dis_max) dis_max = dis;
if(dis < dis_min) dis_min = dis;
dis_sum += dis;
dis_ave = (dis_sum / dis_index);
}
}
else
{
if(Read_v() > 150)
if(Read_v() < 150)
{
dis = distance;
dis_index++;
if(dis > dis_max) dis_max = dis;
if(dis < dis_min) dis_min = dis;
dis_sum += dis;
dis_ave = (dis_sum / dis_index);
}
}
}
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 && mode_dat == 0) Led(0,1);
else Led(0,0);
if(!mode && mode_dat == 1) Led(1,1);
else Led(1,0);
if(!mode && mode_dat == 2) Led(2,1);
else Led(2,0);
if(!mode_dis) Led(3,1);
else Led(3,0);
if(L5_flag) Led(4,1);
else Led(4,0);
if(Read_v() > 150) Led(5,1);
else Led(5,0);
}
void UartInit(void) //9600bps@12.000MHz
{
SCON = 0x50; //8位数据,可变波特率
AUXR &= 0xBF; //定时器1时钟为Fosc/12,即12T
AUXR &= 0xFE; //串口1选择定时器1为波特率发生器
TMOD &= 0x0F; //设定定时器1为16位自动重装方式
TL1 = 0xE6; //设定定时初值
TH1 = 0xFF; //设定定时初值
ET1 = 0; //禁止定时器1中断
TR1 = 1; //启动定时器1
}
extern char putchar(char dat)
{
SBUF = dat;
while(!TI);
TI = 0;
return dat;
}
void main()
{
Sys_Init();
PCA_Init();
Write_time();
Timer0Init();
UartInit();
while(1)
{
Send();
Read_time();
key_val = Key_Scan();
Key_Pro();
Out_dac();
Dis_Pro();
Led_Pro();
if(!mode)
{
switch(mode_dat)
{
case 0:Display_time();break;
case 1:Display_dis();break;
case 2:Display_record();break;
}
}
else
{
if(!mode_param) Display_param_time();
else Display_param_dis();
}
}
}
