# 实物图
# 电路原理图
# 独立下载程序(可直接下载运行)_CT107D 赛前准备 (opens new window)
# 独立下载程序(可直接下载运行)CT107D 赛前准备含 USB 转串口驱动 (opens new window)
# 更新时间:2019-3-22
- 所有文件(源代码) (opens new window)
common.h
main.c
timer.c
hc138.c
led.c
drivers.c
digital_tube.c
key.c
ds18b20.c
ds1302.c
i2c.c
sonic_infra.c
# 功能介绍
K1:打印从串口接收到的信息,并显示在数码管上
K2:显示DS18B20温度值
K3:读取DS1302的时分秒值
K4:读取DS1302的星期的值
K5:读取DS1302的年月日的值
K6:从EEPROM中写入并读出数据(隔一秒加1)
K7:显示超声波的距离
K8:显示A/D管脚的输入AD值(AD0)
K9:显示光敏电阻的AD值(AD1)
K10:显示IN-/IN+的差分AD值(AD2)
K11:显示电位器的AD值(AD3)(Rb2)
K12:显示D/A管脚的输出DA值(127,2.5V)
K13:让接在MOT与VCC之间的电机以30%(1.5V)的速度旋转
连按两下任意按键,显示按键对应的值:
1,2,3,4,
5,6,7,8,
9,a,b,c,
d,e,f,.
长按任意按键,LED(L1-L8)显示对应的值二进制值(从左往右,L1->L2->L3->L4->L5->L6->L7->L8)
按键按下时有蜂鸣器提示音
波特率为2400
x^1=~x; X^0=X;
Px^x不可直接赋值,Pxx可直接赋值;
P4^2,不可直接赋值,P42=0,可直接赋值;
Can't shift a single PIN, but can shift the entire I/O port;
(不可移位单个PIN,可移位整个I/O口);
Declare variable first, then operate; //uchar i; TR0=0;
(先声明变量,后操作);
(数码管先段码再位码);
(数据总线在读写之前要释放);
(协议传输中拉低拉高需要一定的时间,因查看相应的说明书);// PCF8591的速度比I2C慢,SCL需要延迟5us
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# 所有文件(all files)
# common.h
common.h
#ifndef COMMON_H
#define COMMON_H
#include "stc15f2k60s2.h"
#include "intrins.h"
typedef unsigned char uchar;
typedef unsigned short int uint;
#define seg_tab_none 19
#define bit_tab_none 8
extern uchar disp_val[8];
extern uchar trg,cont,key_val;
extern void Timer0Init(void);
extern void Timer1Init(void);
extern void UartInit(void);
extern void hc138Init(void);
extern void hc138_led(void);
extern void hc138_drivers(void);
extern void hc138_bit(void);
extern void hc138_seg(void);
extern void hc138_none(void);
extern void ledInit(void);
extern void led_on_N(uchar led);
extern void relayInit(void);
extern void relay_off(void);
extern void motorInit(void);
extern void motor_on(void);
extern void motor_off(void);
extern void buzzInit(void);
extern void buzz_on(void);
extern void buzz_off(void);
extern void disp_scan(void);
extern void disp_val_none(void);
extern void key_scan(void);
extern void ds18b20Init(void);
extern uchar ds18b20_get(void);
extern void ds1302_burst_write(uchar *dat);
extern void ds1302_burst_read(uchar *dat);
extern void ds1302Init(void);
extern uint sonic_get(void);
//extern void e2_reset(void);
extern void e2_write(uchar word,uchar *dat,uchar len);
extern void e2_read(uchar word,uchar *dat,uchar len);
extern void adc_get(uchar *dat,uchar len);
extern void dac_set(uchar dat);
#endif
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# main.c
main.c
#include "common.h"
void SysInit(void)
{
disp_val_none();
Timer0Init();
Timer1Init();
UartInit();
//Timer2Init();
hc138Init();
ledInit();
buzzInit();
motorInit();
relayInit();
ds18b20Init();
ds1302Init();
//e2_reset();
EA=1;
ET0=1;
ET1=1;
ES=1;
//IE2|=0x04;
}
void main(void)
{
SysInit();
while(1);
}
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# timer.c
timer.c
#include "common.h"
static uchar page=1;
static uchar rxd_data=0;
static uchar temperature=0;
static uchar ds1302_time[7];
static uint sonic_distance=0;
static idata uchar e2_write_data[8]={0,1,2,3,4,5,6,7},e2_read_data[8];
static uchar adc_data[4];
static uchar dac_data=128;
static uchar trg_times,trg_clock,cont_clock;
static uchar pwm_clock,pwm_data=30;
static bit pwm_flag=0;
static uchar buzz=0;
void Timer0Init(void) //10微秒@11.0592MHz
{
AUXR &= 0x7F; //定时器时钟12T模式
TMOD &= 0xF0; //设置定时器模式
TL0 = 0xF7; //设置定时初值
TH0 = 0xFF; //设置定时初值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
}
void Timer1Init(void) //50毫秒@11.0592MHz
{
AUXR &= 0xBF; //定时器时钟12T模式
TMOD &= 0x0F; //设置定时器模式
TL1 = 0x00; //设置定时初值
TH1 = 0x4C; //设置定时初值
TF1 = 0; //清除TF1标志
TR1 = 1; //定时器1开始计时
}
void UartInit(void) //2400bps@11.0592MHz
{
SCON = 0x50; //8位数据,可变波特率
AUXR |= 0x01; //串口1选择定时器2为波特率发生器
AUXR &= 0xFB; //定时器2时钟为Fosc/12,即12T
T2L = 0xA0; //设定定时初值
T2H = 0xFF; //设定定时初值
AUXR |= 0x10; //启动定时器2
}
void trg_run(void)
{
if(trg)
{
if(++trg_times==1)
{
trg_clock=0;
}
buzz=1;
switch(key_val)
{
case 1:page=1;break;
case 2:page=2;break;
case 3:page=3;break;
case 4:page=4;break;
case 5:page=5;break;
case 6:page=6;break;
case 7:page=7;break;
case 8:page=8;break;
case 9:page=9;break;
case 10:page=10;break;
case 11:page=11;break;
case 12:page=12;break;
case 13:page=13;break;
case 14:page=14;break;
case 15:page=15;break;
case 16:page=16;break;
default:break;
}
}
}
void trg_double_run(void)
{
if(++trg_clock>=15)
{
trg_clock=0;
trg_times=0;
}
if(trg_clock<15&&trg_times==2)
{
trg_clock=0;
trg_times=0;
disp_val_none();
switch(key_val)
{
case 1:disp_val[0]=key_val;break;
case 2:disp_val[0]=key_val;break;
case 3:disp_val[0]=key_val;break;
case 4:disp_val[0]=key_val;break;
case 5:disp_val[0]=key_val;break;
case 6:disp_val[0]=key_val;break;
case 7:disp_val[0]=key_val;break;
case 8:disp_val[0]=key_val;break;
case 9:disp_val[0]=key_val;break;
case 10:disp_val[0]=key_val;break;
case 11:disp_val[0]=key_val;break;
case 12:disp_val[0]=key_val;break;
case 13:disp_val[0]=key_val;break;
case 14:disp_val[0]=key_val;break;
case 15:disp_val[0]=key_val;break;
case 16:disp_val[0]=key_val;break;
default:break;
}
}
}
void cont_run(void)
{
if(cont)
{
if(++cont_clock>=20)
{
switch(key_val)
{
case 1:led_on_N(~key_val);break;
case 2:led_on_N(~key_val);break;
case 3:led_on_N(~key_val);break;
case 4:led_on_N(~key_val);break;
case 5:led_on_N(~key_val);break;
case 6:led_on_N(~key_val);break;
case 7:led_on_N(~key_val);break;
case 8:led_on_N(~key_val);break;
case 9:led_on_N(~key_val);break;
case 10:led_on_N(~key_val);break;
case 11:led_on_N(~key_val);break;
case 12:led_on_N(~key_val);break;
case 13:led_on_N(~key_val);break;
case 14:led_on_N(~key_val);break;
case 15:led_on_N(~key_val);break;
case 16:led_on_N(~key_val);break;
default:break;
}
}
}
else
{
cont_clock=0;
led_on_N(0xff);
}
}
void buzz_run(void)
{
if(buzz==1)
{
buzz=2;
relay_off();
buzz_on();
}
else if(buzz==2)
{
buzz=0;
relay_off();
buzz_off();
}
}
void uart_run(void)
{
disp_val_none();
disp_val[0]=rxd_data%10;
disp_val[1]=rxd_data%100/10;
disp_val[2]=rxd_data/100;
}
void ds18b20_run(void)
{
disp_val_none();
temperature=ds18b20_get();
disp_val[0]=0x0c;
disp_val[1]=18;
disp_val[2]=temperature%10;
disp_val[3]=temperature/10;
}
void ds1302_HHMMSS_run(void)
{
disp_val_none();
ds1302_burst_read(ds1302_time);
disp_val[0]=ds1302_time[0]&0x0f;
disp_val[1]=ds1302_time[0]>>4&0x0f;
disp_val[2]=17;
disp_val[3]=ds1302_time[1]&0x0f;
disp_val[4]=ds1302_time[1]>>4&0x0f;
disp_val[5]=17;
disp_val[6]=ds1302_time[2]&0x0f;
disp_val[7]=ds1302_time[2]>>4&0x0f;
}
void ds1302_week_run(void)
{
disp_val_none();
ds1302_burst_read(ds1302_time);
disp_val[0]=17;
disp_val[1]=17;
disp_val[2]=17;
disp_val[3]=17;
disp_val[4]=ds1302_time[5]&0x0f;
disp_val[5]=17;
disp_val[6]=17;
disp_val[7]=17;
}
void ds1302_YYMMDD_run(void)
{
disp_val_none();
ds1302_burst_read(ds1302_time);
disp_val[0]=ds1302_time[3]&0x0f;
disp_val[1]=ds1302_time[3]>>4&0x0f;
disp_val[2]=17;
disp_val[3]=ds1302_time[4]&0x0f;
disp_val[4]=ds1302_time[4]>>4&0x0f;
disp_val[5]=17;
disp_val[6]=ds1302_time[6]&0x0f;
disp_val[7]=ds1302_time[6]>>4&0x0f;
}
void sonic_run(void)
{
disp_val_none();
sonic_distance=sonic_get();
disp_val[0]=sonic_distance%10;
disp_val[1]=sonic_distance%100/10;
disp_val[2]=sonic_distance%1000/100;
disp_val[3]=sonic_distance%10000/1000;
disp_val[4]=sonic_distance/10000;
}
void e2_run(void)
{
static uchar i=0;
disp_val_none();
e2_write(0x00,e2_write_data,sizeof(e2_write_data));
e2_read(0x00,e2_read_data,sizeof(e2_read_data));
disp_val[0]=e2_read_data[0]%10;
disp_val[1]=e2_read_data[0]%100/10;
disp_val[2]=e2_read_data[0]/100;
disp_val[3]=e2_read_data[1]%10;
disp_val[4]=e2_read_data[1]%100/10;
disp_val[5]=e2_read_data[1]/100;
disp_val[6]=e2_read_data[2]%10;
disp_val[7]=e2_read_data[2]%100/10;
for(i=0;i<sizeof(e2_write_data);i++)
{
e2_write_data[i]++;
}
}
void adc_run(void)
{
disp_val_none();
adc_get(adc_data,sizeof(adc_data));
disp_val[0]=adc_data[page-8]%10;
disp_val[1]=adc_data[page-8]%100/10;
disp_val[2]=adc_data[page-8]/100;
disp_val[3]=0x11;
disp_val[4]=page-8;
disp_val[5]=0x0d;
disp_val[6]=0x0a;
disp_val[7]=0x11;
}
void dac_run(void)
{
disp_val_none();
dac_set(dac_data);
adc_get(adc_data,sizeof(adc_data));
disp_val[0]=adc_data[0]%10;
disp_val[1]=adc_data[0]%100/10;
disp_val[2]=adc_data[0]/100;
disp_val[3]=0x11;
disp_val[4]=0x0c;
disp_val[5]=0x0a;
disp_val[6]=0x0d;
disp_val[7]=0x11;
}
void pwm_run(void)
{
static uint clock=0;
if(pwm_flag)
{
if(++pwm_clock<=pwm_data)
{
relay_off();
buzz_off();
motor_on();
}
else if(pwm_clock>pwm_data&&pwm_clock<=100)
{
relay_off();
buzz_off();
motor_off();
}
else
{
pwm_clock=0;
if(++clock==1000)
{
clock=0;
disp_val_none();
disp_val[0]=0x11;
disp_val[1]=0x11;
disp_val[2]=0x11;
disp_val[3]=pwm_data%10;
disp_val[4]=pwm_data%100/10;
disp_val[5]=pwm_data/100;
disp_val[6]=0x11;
disp_val[7]=0x11;
}
}
}
}
void Timer0_Routine(void) interrupt 1
{
// 10us
static uchar clock=0;
TR0=0;
if(++clock==100)
{
clock=0;
disp_scan();
}
pwm_run();
TR0=1;
}
void Timer1_Routine(void) interrupt 3
{
// 50ms
static uint clock=0;
TR1=0;
key_scan();
trg_run();
trg_double_run();
cont_run();
relay_off();
buzz_off();
motor_off();
buzz_run();
if(++clock==20)
{
clock=0;
switch(page)
{
case 1:pwm_flag=0;uart_run();break;
case 2:pwm_flag=0;ds18b20_run();break;
case 3:pwm_flag=0;ds1302_HHMMSS_run();break;
case 4:pwm_flag=0;ds1302_week_run();break;
case 5:pwm_flag=0;ds1302_YYMMDD_run();break;
case 6:pwm_flag=0;sonic_run();break;
case 7:pwm_flag=0;e2_run();break;
case 8:pwm_flag=0;adc_run();break;
case 9:pwm_flag=0;adc_run();break;
case 10:pwm_flag=0;adc_run();break;
case 11:pwm_flag=0;adc_run();break;
case 12:pwm_flag=0;dac_run();break;
case 13:pwm_flag=1;break;
default:break;
}
}
TR1=1;
}
void Uart(void) interrupt 4
{
REN=0;
if(RI)
{
RI=0;
rxd_data=SBUF;
SBUF=rxd_data;
}
if(TI)
{
TI=0;
}
REN=1;
}
//void Timer2_Routine(void) interrupt 12
//{
// //50ms
// AUXR&=0xef;
//
// AUXR|=0x10;
//}
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# hc138.c
hc138.c
#include "common.h"
#define HC138 P2
void hc138Init(void)
{
HC138&=0x1f;
}
void hc138_none(void)
{
HC138&=0x1f;
}
void hc138_led(void)
{
HC138&=0x1f;
HC138|=0x80;
}
void hc138_drivers(void)
{
HC138&=0x1f;
HC138|=0xa0;
}
void hc138_bit(void)
{
HC138&=0x1f;
HC138|=0xc0;
}
void hc138_seg(void)
{
HC138&=0x1f;
HC138|=0xe0;
}
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# led.c
led.c
#include "common.h"
#define LED P0
void ledInit(void)
{
LED=0xff;
hc138_led();
hc138_none();
}
void led_on_N(uchar led)
{
LED=led;
hc138_led();
hc138_none();
}
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# drivers.c
drivers.c
#include "common.h"
sbit RELAY_PIN=P0^4;
sbit MOTOR_PIN=P0^5;
sbit BUZZ_PIN=P0^6;
void relayInit(void)
{
RELAY_PIN=0;
hc138_drivers();
hc138_none();
}
void relay_off(void)
{
RELAY_PIN=0;
hc138_drivers();
hc138_none();
}
void motorInit(void)
{
MOTOR_PIN=0;
hc138_drivers();
hc138_none();
}
void motor_on(void)
{
MOTOR_PIN=1;
hc138_drivers();
hc138_none();
}
void motor_off(void)
{
MOTOR_PIN=0;
hc138_drivers();
hc138_none();
}
void buzzInit(void)
{
BUZZ_PIN=0;
hc138_drivers();
hc138_none();
}
void buzz_on(void)
{
BUZZ_PIN=1;
hc138_drivers();
hc138_none();
}
void buzz_off(void)
{
BUZZ_PIN=0;
hc138_drivers();
hc138_none();
}
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# digital_tube.c
digital_tube.c
#include "common.h"
#define SEG P0
#define BIT P0
uchar seg_tab[20]={0xc0,0xf9,0xa4,0xb0,0x99,
0x92,0x82,0xf8,0x80,0x90,
0x88,0x83,0xc6,0xa1,0x86,0x8e,
0x7f,0xbf,0x9c,0xff};//0~9,a~f,.,-,o,none
uchar bit_tab[9]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01,0x00};
uchar disp_val[8]={seg_tab_none,seg_tab_none,seg_tab_none,seg_tab_none,
seg_tab_none,seg_tab_none,seg_tab_none,seg_tab_none,};
void disp_scan(void)
{
static uchar pointer=0;
SEG=seg_tab[seg_tab_none];
hc138_seg();
SEG=seg_tab[disp_val[pointer]];
hc138_none();
BIT=bit_tab[bit_tab_none];
hc138_bit();
BIT=bit_tab[pointer];
hc138_none();
if(++pointer==sizeof(disp_val))
{
pointer=0;
}
}
void disp_val_none(void)
{
uchar i;
for(i=0;i<sizeof(disp_val);i++)
{
disp_val[i]=seg_tab_none;
}
}
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# key.c
key.c
#include "common.h"
#define KEY P3
uchar trg,cont,trg_row,trg_column,cont_row,cont_column,key_val;
void key_scan(void)
{
uchar readdata=0x00,P42_val,P44_val;
KEY=0x0f;
P42=0;
P44=0;
P42_val=P42;
P44_val=P44;
P42_val=P42_val<<6&0x40;
P44_val=P44_val<<7&0x80;
readdata=KEY&0x3f|P42_val|P44_val;
readdata^=0x0f;
trg_row=readdata&(readdata^cont_row);
cont_row=readdata;
KEY=0xf0;
P42=1;
P44=1;
P42_val=P42;
P44_val=P44;
P42_val=P42_val<<6&0x40;
P44_val=P44_val<<7&0x80;
readdata=KEY&0x3f|P42_val|P44_val;
readdata^=0xf0;
trg_column=readdata&(readdata^cont_column);
cont_column=readdata;
trg=trg_row|trg_column;
cont=cont_row|cont_column;
switch(trg)
{
case 0x81:key_val=1;break;
case 0x41:key_val=2;break;
case 0x21:key_val=3;break;
case 0x11:key_val=4;break;
case 0x82:key_val=5;break;
case 0x42:key_val=6;break;
case 0x22:key_val=7;break;
case 0x12:key_val=8;break;
case 0x84:key_val=9;break;
case 0x44:key_val=10;break;
case 0x24:key_val=11;break;
case 0x14:key_val=12;break;
case 0x88:key_val=13;break;
case 0x48:key_val=14;break;
case 0x28:key_val=15;break;
case 0x18:key_val=16;break;
default:break;
}
KEY=0xff;
}
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# ds18b20.c
ds18b20.c
#include "common.h"
sbit DQ=P1^4;
void Delay500us() //@11.0592MHz
{
unsigned char i, j;
_nop_();
_nop_();
i = 6;
j = 93;
do
{
while (--j);
} while (--i);
}
void Delay50us() //@11.0592MHz
{
unsigned char i, j;
_nop_();
i = 1;
j = 134;
do
{
while (--j);
} while (--i);
}
void ds18b20_start(void)
{
DQ=1;
DQ=0;
Delay500us();
DQ=1;
Delay50us();
while(~DQ);
}
void ds18b20_write(uchar dat)
{
static uchar mask=0x00;
DQ=1;
for(mask=0x01;mask;mask<<=1)
{
DQ=0;
DQ=dat&mask;
Delay50us();
Delay50us();
DQ=1;
}
DQ=1;
}
uchar ds18b20_read(void)
{
static uchar mask=0x00,val=0;
DQ=1;
for(mask=0x01;mask;mask<<=1)
{
DQ=0;
DQ=1;
if(DQ)
val|=mask;
else
val&=~mask;
Delay50us();
Delay50us();
}
DQ=1;
return val;
}
void ds18b20Init(void)
{
ds18b20_start();
ds18b20_write(0xcc);
ds18b20_write(0x44);
}
uchar ds18b20_get(void)
{
static uchar val=0,temp[2];
ds18b20_start();
ds18b20_write(0xcc);
ds18b20_write(0x44);
ds18b20_start();
ds18b20_write(0xcc);
ds18b20_write(0xbe);
temp[0]=ds18b20_read();
temp[1]=ds18b20_read();
val=temp[0]>>4&0x0f|temp[1]<<4&0xf0;
return val;
}
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# ds1302.c (burst_mode)
ds1302.c
#include "common.h"
sbit CE=P1^3;
sbit SCLK=P1^7;
sbit I_O=P2^3;
uchar ds1302_init_time[7]={0x50,0x08,0x21,0x22,0x03,0x05,0x19};
void ds1302_write_byte(uchar dat)
{
static uchar mask=0x00;
I_O=1;
for(mask=0x01;mask;mask<<=1)
{
I_O=dat&mask;
SCLK=1;
SCLK=0;
}
I_O=1;
}
uchar ds1302_read_byte(void)
{
static uchar mask=0x00,val=0;
I_O=1;
for(mask=0x01;mask;mask<<=1)
{
SCLK=1;
if(I_O)
val|=mask;
else
val&=~mask;
SCLK=0;
}
I_O=1;
return val;
}
void ds1302_address(uchar reg,bit read)
{
reg<<=1;
if(read)
reg|=0x01;
else
reg&=0xfe;
ds1302_write_byte(reg);
}
void ds1302_single_write(uchar reg,uchar dat)
{
SCLK=0;
I_O=0;
CE=1;
ds1302_address(reg,0);
ds1302_write_byte(dat);
CE=0;
}
uchar ds1302_single_read(uchar reg)
{
static uchar val=0;
SCLK=0;
I_O=0;
CE=1;
ds1302_address(reg,1);
val=ds1302_read_byte();
CE=0;
return val;
}
void ds1302_burst_write(uchar *dat)
{
static uchar i=0;
SCLK=0;
I_O=0;
CE=1;
ds1302_write_byte(0xbe);
for(i=0;i<8;i++)
ds1302_write_byte(*dat++);
CE=0;
}
void ds1302_burst_read(uchar *dat)
{
static uchar i=0;
SCLK=0;
I_O=0;
CE=1;
ds1302_write_byte(0xbf);
for(i=0;i<8;i++)
*dat++=ds1302_read_byte();
CE=0;
}
void ds1302Init(void)
{
ds1302_single_write(7,0);
if(ds1302_single_read(0)&0x80)
ds1302_burst_write(ds1302_init_time);
}
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# i2c.c (Page_Write, Random_Sequential_Read)
i2c.c
//数据总线要释放
#include "common.h"
sbit SCL=P2^0;
sbit SDA=P2^1;
void Delay5us() //@11.0592MHz
{
unsigned char i;
_nop_();
i = 11;
while (--i);
}
void i2c_start(void)
{
SDA=1;
Delay5us();
SCL=1;
Delay5us();
SDA=0;
Delay5us();
SCL=0;
Delay5us();
}
void i2c_stop(void)
{
SCL=0;
Delay5us();
SDA=0;
Delay5us();
SCL=1;
Delay5us();
SDA=1;
Delay5us();
}
bit i2c_write_byte(uchar dat)
{
bit ack=1;
static uchar mask=0x00;
SDA=1;
Delay5us();
for(mask=0x80;mask;mask>>=1)
{
SDA=dat&mask;
Delay5us();
SCL=1;
Delay5us();
SCL=0;
Delay5us();
}
SDA=1;
Delay5us();
SCL=1;
Delay5us();
ack=SDA;
SCL=0;
Delay5us();
return ack;
}
uchar i2c_read_byte_ack(void)
{
static uchar mask=0x00,val=0;
SDA=1;
Delay5us();
for(mask=0x80;mask;mask>>=1)
{
SCL=1;
Delay5us();
if(SDA)
val|=mask;
else
val&=~mask;
Delay5us();
SCL=0;
Delay5us();
}
SDA=1;
Delay5us();
SDA=0;
Delay5us();
SCL=1;
Delay5us();
SCL=0;
Delay5us();
return val;
}
uchar i2c_read_byte_nack(void)
{
static uchar mask=0x00,val=0;
SDA=1;
Delay5us();
for(mask=0x80;mask;mask>>=1)
{
SCL=1;
Delay5us();
if(SDA)
val|=mask;
else
val&=~mask;
Delay5us();
SCL=0;
Delay5us();
}
SDA=1;
Delay5us();
SCL=1;
Delay5us();
SCL=0;
Delay5us();
return val;
}
bit i2c_device(uchar dev,bit read)
{
bit ack=1;
dev<<=1;
if(read)
dev|=0x01;
else
dev&=0xfe;
ack=i2c_write_byte(dev);
return ack;
}
void adc_get(uchar *dat,uchar len)
{
do{
i2c_start();
if(~i2c_device(0x48,0))
break;
i2c_stop();
}while(1);
i2c_write_byte(0x44);
i2c_start();
i2c_device(0x48,1);
i2c_read_byte_ack();
while(len-->1)
*dat++=i2c_read_byte_ack();
*dat=i2c_read_byte_nack();
i2c_stop();
}
void dac_set(uchar dat)
{
do{
i2c_start();
if(~i2c_device(0x48,0))
break;
i2c_stop();
}while(1);
i2c_write_byte(0x44);
i2c_write_byte(dat);
i2c_stop();
}
void e2_write(uchar word,uchar *dat,uchar len)
{
do{
i2c_start();
if(~i2c_device(0x50,0))
break;
i2c_stop();
}while(1);
i2c_write_byte(word);
while(len--)
i2c_write_byte(*dat++);
i2c_stop();
}
void e2_read(uchar word,uchar *dat,uchar len)
{
do{
i2c_start();
if(~i2c_device(0x50,0))
break;
i2c_stop();
}while(1);
i2c_write_byte(word);
i2c_start();
i2c_device(0x50,1);
while(len-->1)
*dat++=i2c_read_byte_ack();
*dat=i2c_read_byte_nack();
i2c_stop();
}
//void e2_reset(void)
//{
// static uchar i=0;
// for(i=0;i<255;i++)
// {
// e2_write(i,0);
// }
//}
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# sonic_infra.c
sonic_infra.c
#include "common.h"
sbit TX=P1^0;
sbit RX=P1^1;
uchar sonic_times=8;
void Delay10us() //@11.0592MHz
{
unsigned char i;
_nop_();
i = 25;
while (--i);
}
void sonic_emit(uchar times)
{
// 50KHz
while(times--)
{
TX=1;
Delay10us();
TX=0;
Delay10us();
}
}
uint sonic_echo(void)
{
static uchar tl,th;
static uint distance,time;
tl=TL1;
th=TH1;
TH1=0x00;
TL1=0x00;
TF1=0;
TR1=1;
while(RX&&~TF1);
TR1=0;
if(TF1)
{
TF1=0;
distance=9999;
return distance;
}
else
{
time=TH1;
time<<=8;
time|=TL1;
}
TH1=th;
TL1=tl;
distance=(uint)(time*0.017); // x=t*v=time/1000000*340*100/2
return distance;
}
uint sonic_get(void)
{
static uint distance=0;
sonic_emit(sonic_times);
distance=sonic_echo();
return distance;
}
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- [x] common.h
- [x] main.c
- [x] timer.c
- [x] hc138.c ---> 数据手册 (opens new window)
- [x] led.c
- [x] drivers.c
- [x] digital_tube.c
- [x] key.c
- [x] ds18b20 ---> 数据手册 (opens new window)
- [x] ds1302 ---> 数据手册 (opens new window)
- [x] IIC ---> 数据手册(AT24C02) (opens new window),数据手册(PCF8591) (opens new window)
- [ ] sonic_infra
- [x] pwm
- [ ] 客观题