Pic microcontroller control clock chip DS1302 program

Single chip microcomputer STM32L151CCU6

1206RGB (single)

#include / / Contains the internal resources of the microcontroller predefined
__CONFIG(0x1832);
/ / Chip configuration word, watchdog off, power-on delay on, power-down detection off, low-voltage programming off, encryption, 4M crystal HS oscillation

#definei_oRB4//Define the data port of DS1302
#definesclkRB0//Define the clock port of the DS1302
#definerstRB5//Define the reset port of DS1302

//unsignedchartime_rx;
Unsignedchartime_rx@0x30; / / define the receiving register
Staticvolatilebittime_rx7@(unsigned)&time_rx*8+7;//The highest bit of the receive register
//staticvolatilebittemp0@(unsigned)&temp*8+0;

Voidport_init();//Declare pin initialization function
Voidds1302_init();//Declare DS1302 initialization function
Voidset_time();// declare the set time function
Voidget_time();//Declare the read time function
Voiddisplay();//Declare the display function
Voidtime_write_1(unsignedchartime_tx); / / declare a byte function
Unsignedchartime_read_1();//Declare to read a byte function
Voiddelay();//Declare the delay function
/ / Define the time to be set: seconds, minutes, hours, days, months, weeks, years, control words
Constchartable[]={0x00,0x58,0x12,0x8,0x3,0x06,0x06,0x00};
/ / Define the read time and date storage table
Chartable1[7];
/ / Define the display code of 0-9
Constchartable2[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

//----------------------------------------------
/ / Main function
Voidmain()
{
Port_init();//call pin initialization function
Ds1302_init();//Invoke DS1302 initialization function
Set_time();//call set time function
While(1)
{
Get_time();//call take time function
Display();//call display function
}
}

//---------------------------------------------
/ / DS1302 initialization function
Voidds1302_init()
{
Sclk=0; / / pull down the clock signal
Rst=0;//Reset DS1302
Rst=1;//Enable DS1302
Time_write_1 (0x8e); / / send control commands
Time_write_1(0);//Allow write DS1302
Rst=0;//reset
}

//---------------------------------------------
/ / Set the time function
Voidset_time()
{
Inti; / / define the loop variable
Rst=1;//Enable DS1302
Time_write_1(0xbe);//clock multibyte write command
For(i=0;i<8;i++)//Write 8 bytes of data continuously
{
Time_write_1(table[i]);//call write a byte function
}
Rst=0;//reset
}

//---------------------------------------------
/ / Read the time function
Voidget_time()
{
Inti; / / set the loop variable
Rst=1;//Enable DS1302
Time_write_1 (0xbf); / / send multi-byte read command
For(i=0;i<7;i++)// continuously reads 7 bytes of data
{
Table1[i]=time_read_1();//call a function that reads 1 byte of data
}
Rst=0;//Reset DS1302
}

//--------------------------------------------
/ / Write a byte data function
Voidtime_write_1(unsignedchartime_tx)
{
Intj; / / set the loop variable
For(j=0;j<8;j++)//Continuous write 8bit
{
I_o=0; / / first set the data to 0
Sclk=0;//clock signal is pulled low
If(time_tx&0x01)//determine that the data bit to be transmitted is 0 or 1
{
I_o=1;//The data bit to be sent is 1
}
Time_tx=time_tx>>1;//The data to be sent is shifted to the right by 1 bit
Sclk=1; / / pull high clock signal
}
Sclk=0; / / write a byte, pull down the clock signal
}

//---------------------------------------------
/ / Read a byte function
Unsignedchartime_read_1()
{
Intj; / / set the loop variable
TRISB4=1; / / set the data port direction as input
For(j=0;j<8;j++)//Continuous reading of 8bit
{
Sclk=0; / / pull down the clock signal
Time_rx=time_rx>>1; / / receive register right shift 1 bit
Time_rx7=i_o;//put the received data to the highest bit of the receive register
Sclk=1; / / pull high clock signal
}
TRISB4=0; / / restore the data port direction to output
Sclk=0; / / pull down the clock signal
Return(time_rx);//return the read data
}

//--------------------------------------------
//pin definition function
Voidport_init()
{
TRISA=0x00; / / set A port full output
TRISD=0X00; / / set D port full output
ADCON1=0X06; / / set A port is a normal I / O port
TRISB=0X02; / / set RB1 as input, the other is output
OPTION=0X00;//Open B port weak pull-up
PORTA=0XFF;
PORTD=0XFF; / / first off all displays
}

//-------------------------------------------
/ / Display function
Voiddisplay()
{
Inti; / / define table lookup variables
If(RB1==0)//Determine whether RB1 is pressed, if it is pressed, the date is displayed, and the display time is not pressed.
{
Table1[0]=table1[3];
Table1[1]=table1[4];
Table1[2]=table1[6];
}
i=table1[0]&0x0f;//seconds of the second
PORTD=table2[i];//Send D port display
PORTA=0x1f;//one bit of the second
Delay();//Extension for a while to ensure brightness
i=table1[0]&0xf0;//Get the tenth of the second
i=i>>4;//shift 4 bits to the right
PORTD=table2[i];//Send D port display
PORTA=0x2f; / / light the tenth of the second
Delay();//Extension for a while to ensure brightness

i=table1[1]&0x0f;//The number of bits to be divided
PORTD=table2[i]&0x7f;//Send D port display and display decimal point
PORTA=0x37; / / lit ones
Delay();//delay for a certain period of time to ensure brightness
i=table1[1]&0xf0;//10 points for the score
i=i>>4;
PORTD=table2[i];//Send D port display
PORTA=0x3b; / / light ten points
Delay();//Extension for a while to ensure brightness

i=table1[2]&0x0f;//one bit of the time
PORTD=table2[i]&0x7f;//Send D port display, plus decimal point
PORTA=0x3d;//one digit when lit
Delay();//delay for a certain period of time to ensure brightness
i=table1[2]&0xf0;//10th in the time
i=i>>4;
PORTD=table2[i];//Send D port display
PORTA=0x3e;//10 digits when lit
Delay();//Extension for a while to ensure brightness
}

//------------------------------------------------ ------------------
/ / delay program
Voiddelay()//delay program
{
Inti; / / define the shaping variable
For(i=0x64;i--;);//delay
}



/ / Set the time and date first: seconds (00), minutes (58), time (12), day (08), month (03), year (06)
//The six-digit digital view shows the time and date. The default is the time. The decimal point is used to distinguish between minutes and minutes.