Design of 51 single chip microcomputer intelligent clock-EEWORLD

Collect

The control system directly controls two groups of 4-bit digital tubes for display through the STC 8a8k64s4a12 single-chip microcomputer, uses the DS1302 clock chip to obtain clock data, uses the DS18b20 to obtain temperature information, and communicates with the mobile phone app through the HC-05 Bluetooth module. The mobile phone app is written by App Inventor 2 and can realize functions such as alarm clock, power-off saving of user-set data, and online automatic time calibration.

The actual work is shown in the figure:

Digital tube driver:

#include

uchar code shuzi[]={

0xc0,//0

0xf9, //1

0xa4,//2

0xb0,//3

0x99,//4

0x92,//5

0x82,//6

0xf8,//7

0x80, //8

0x90,//9

0x88,//A

0x83,//B 11

0xc6,//C 12

0x1,//D

0x86,//E

0x8e,//F

0x8c,//P 16

0x40,//0.

0x79,//1.

0x24,//2.

0x30,//3.

0x19,//4.

0x12,//5.

0x02,//6.

0x78, //7.

0x00,//8.

0x10,//9.

0xbf,//- 27

0xff, // Turn off 28

0x7f,//. 29

0x88,//A 30

0xc7,//L 31

0x87,//t 32

0x86,//E 33

0x8c,//P 34

0x83,//b 35

0x8b,//h 36

0x8e,//F 37

0xc8,//N 38

0x9c, //Small circle 39

0xc1,//in 40

};

/***********************************************************************************************************

* Function name: xianshi()

* shūrùcānshù: fly, fly, fly, fly, fly, fly, fly, fly

* Output parameters: void

* Function: Digital tube driver

* Note: To drive an 8-bit digital tube, the value of the parameter corresponds to the bit in the array shuzi, and the number of the parameter corresponds to the bit of the digital tube.

* Completion date: 2019.12.25

************************************************************************************************************/

void xianshi(fly a,fly b,fly c,fly d,fly e,fly f,fly g,fly h)////gōngyīn

{

P2=0xff-shuzi[a];

wei1=0;

delay(2);

wei1=1;

P2=0xff-shuzi[b];

wei2=0;

delay(2);

wei2=1;

P2=0xff-shuzi[c];

wei3=0;

delay(2);

wei3=1;

P2=0xff-shuzi[d];

wei4=0;

delay(2);

wei4=1;

P2=0xff-shuzi[e];

wei5=0;

delay(2);

wei5=1;

P2=0xff-shuzi[f];

wei6=0;

delay(2);

wei6=1;

P2=0xff-shuzi[g];

wei7=0;

delay(2);

wei7=1;

P2=0xff-shuzi[h];

wei8=0;

delay(2);

wei8=1;

}

/***********************************************************************************************************

* Function name: xianshi5()

* Input parameters:uchar,uchar,uchar,uchar,uchar

* Output parameters: void

* Function: Digital tube driver

* Note: Drive 5-digit digital tube, the value of the parameter corresponds to the bit in the array shuzi, the number of the parameter corresponds to the bit of the digital tube, the display cycle is short

* Completion date: 2019.12.25

************************************************************************************************************/

void xianshi5(fly d,fly e,fly f,fly g,fly h)////gōngyīn

{

wei1=wei2=wei3=1;

P2=0xff-shuzi[d];

wei4=0;

delay(2);

wei4=1;

P2=0xff-shuzi[e];

wei5=0;

delay(2);

wei5=1;

P2=0xff-shuzi[f];

wei6=0;

delay(2);

wei6=1;

P2=0xff-shuzi[g];

wei7=0;

delay(2);

wei7=1;

P2=0xff-shuzi[h];

wei8=0;

delay(2);

wei8=1;

}

ds1302 driver:

#include

uchar shijian[13]={0,0,0,0,0,0,0,0,0,0,0,0,0}; //Time cache array

/***********************************************************************************************************

* Function name: xie1302()

* Input parameter:uchar

* Output parameters: void

* Function: Write 1302 timing

* Note: Write the formal parameters to DS1302

* Completion date: 2019.12.25

************************************************************************************************************/

void xie1302(uchar dat) // write 1302 timing

{

flying i;

SCLK=0; //Pull SCLK low to prepare for writing data on the rising edge of the pulse

delayus(2); //Wait for a while to prepare the hardware

for(i=0;i<8;i++)

{

IO=dat&0x01; //Get the 0th bit of dat and write it to 1302

delayus(2); //Wait for a while to prepare the hardware

SCLK=1; //Rising edge writes data

delayus(2); //Wait for a while to make the hardware ready 3

SCLK=0; //Pull SCLK down again to form a pulse

dat>>=1; //Shift each data bit of dat right by 1 bit, and prepare to write the next data bit

}

/***********************************************************************************************************

* Function name: du1302()

* Input parameter: void

* Output parameter: uchar

* Function: Read 1302 timing

* Note: Output the read data

* Completion date: 2019.12.25

************************************************************************************************************/

uchar du1302(void) // read 1302 timing

{

flying i,dat;

delayus(2); //Wait for a while to prepare the hardware

for(i=0;i<8;i++)

{

dat>>=1; //Shift each data bit of dat right by 1 bit, because the lowest bit of the byte is read first

if(IO==1) //If the read data is 1

dat|=0x80; //Take out 1 and write it to the highest bit of dat

SCLK=1; //Set SCLK to high level and read out the falling edge

delayus(2); //Wait for a while to prepare the hardware

SCLK=0; //Pull SCLK low to form a falling edge of the pulse

delayus(2); //Wait for a while to prepare the hardware

}

return dat; //Return the read data

}

/***********************************************************************************************************

* Function name:xiemingling1302()

* Input parameters: uchar, uchar

* Output parameters: void

* Function: write instructions and data to ds1302

* Note: Actually, xie1302() is called twice to write the command and data respectively.

* Completion date: 2019.12.25

************************************************************************************************************/

[1] [2] [3] [4] [5] [6] [7] [8] [9]

Reference address：Design of 51 single chip microcomputer intelligent clock

Previous article：Stepper Motor Control and Simulation Based on 51 Single Chip Microcomputer
Next article：51 MCU 12864 display electronic password lock source code

Popular Resources
Popular amplifiers