PIC184520 with 74HC595

[djc]

HI,

Can anybody plz tell me how to program 74HC595 with said controller when both clock and latch pins of 74HC595 are shorted together.
How should i start? I am using mikroC PRO for PIC. Plz guide.

Thanking you

 

[errakeshpillai]

74HC595 is an 8-bit serial in parallel out shift register.
What do you want to do..?

 

[jayanth.devarayanadurga]

See this LCD project I have done using 74HC595. http://www.libstock.com/projects/view/659/3-wire-serial-lcd-using-74hc595

 

[Jestin_cubetech]

3 wire LCD
https://www.edaboard.com/threads/257285/

 

[djc]

hi pillai,

I have 12 FND's which will be selected by 2 74HC595 and third 74HC595 will be used to display the data.

 

[djc]

Hi,
While using 74HC595 we have to shift the data bit by bit. Now if I have 7 segment display data for nos from 0-9. I have stored that data in an array in binary form as follows,
int arr[10] = {0b00010001,0b01111101,0b00100011,0b00100101,0b01001101,0b10000101,0b10000001,0b00111101,0b00000001,0b00000101};

Now i have a doubt that how to access this data bit by bit and send it on Data line of 74HC595. Because arr[0] or arr[1] would mean 0th or 1st element of an array? then how to access it bit wise? Plz guide.

 

[djc]

Hi all,
Facing problem once again this is my modified code.

#define Select_DS     PORTD.B7       //May only DS,STCP and SHCP pins are used
#define Select_Clk     PORTD.B6
#define Data_DS       PORTD.B5
#define Data_Clk      PORTD.B4
#define Relay         PORTD.B3
#define Buzzer        PORTD.B2

   int k=0,i=0,j=0,l=0;
   int arr_large[10] = {17,125,35,37,77,133,129,61,1,5};
   
   void main() {
          long int decimalNumber,remainder,quotient;
          int binaryNumber[100],i=1,j,k;


          TRISD = 0x00;
          
          Select_Clk = 0;

          Select_DS = 1;            //1
          Select_Clk = 1;
          Select_Clk = 0;

          Select_DS = 0;            //2
          Select_Clk = 1;
          Select_Clk = 0;

          Select_DS = 0;            //3
          Select_Clk = 1;
          Select_Clk = 0;

          Select_DS = 0;            //4
          Select_Clk = 1;
          Select_Clk = 0;

          Select_DS = 0;            //5
          Select_Clk = 1;
          Select_Clk = 0;

          Select_DS = 0;            //6
          Select_Clk = 1;
          Select_Clk = 0;

          /*Select_DS = 0;          //7
          Select_Clk = 1;
          Select_Clk = 0;

          Select_DS = 0;          //8
          Select_Clk = 1;
          Select_Clk = 0;*/
          
          while(1){
          for(l=0;l<=9;l++){
          quotient = arr_large[l];
          //quotient = arr_large[7];
          while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                             for(j = i -1 ;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Data_Clk = 0;
                             Delay_us(10);
                             }
                 Data_Clk = 1;
                 Data_Clk = 0;
                 Delay_ms(1000);
            }
      }
}

In this code i have used decimal no and converted it to binary no to send it on 74hc595. To access array i used variable l then convert it to binary no. By using select clock i am selecting particular FND. But issue is it's displaying only first no that is zero and variable is not incrementing. Why it is happening? can any body plz guide.

 

[Jestin_cubetech]

post your schematic

 

[djc]

hi jestin,
issue is solved now. It was correcting just one variable.

Thanking you.

 

[djc]

Hi all,

i am facing new issue in above project. When i display the data on particular FND , data displays perfectly however remaining segments of FND also glows little bit. Why is this happening ? After displaying the data i am sending one blanking pulse too/, but issue still remains same. Can u guys plz guide me. I cannot change the hardware. Code is as follows

#define Select_DS     PORTD.B7
#define Select_Clk     PORTD.B6
#define Data_DS       PORTD.B5
#define Data_Clk      PORTD.B4
#define Relay         PORTD.B3
#define Buzzer        PORTD.B2

 // unsigned long int k=0,i=0,j=0,l=0;
 unsigned int arr_small[10] = {24,222,52,148,210,145,17,220,16,144};
 unsigned  int arr_large[10] = {17,125,35,37,77,133,129,61,1,5};
 unsigned  int arr_med[10] = {20,126,140,44,102,37,5,124,4,36};
 //unsigned  int Select_FND[12] = {16,32,64,128,256,512,1024,2048,4096,8192,16384,32768};
 unsigned int  decimalNumber,remainder,quotient,decimalNumber_1,remainder_1,quotient_1;
 unsigned int  binaryNumber[100],binaryNumber_1[100],i=1,j,k,l=0,m=0,q=0;


void main()
{

          TRISD = 0x00;

          Select_Clk = 0;
          Select_DS = 1;
          Delay_us(5);

          while(1){
          Select_DS = 1;
          Delay_us(5);

            for(l=0;l<=4;l++){
            quotient = arr_small[l];
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(5);
                             Data_Clk = 0;
                             Delay_us(5);
                             }
                 Data_Clk = 1;
                 Delay_us(5);
                 Data_Clk = 0;

                 Select_Clk = 1;
                 Delay_us(5);
                 Select_DS = 0;
                 Select_Clk = 0;
                 Delay_ms(1000);
                 
                           quotient = 255;                          //Data for blanking
                           i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(2);
                             Data_Clk = 0;
                             Delay_us(2);
                             }
                 Data_Clk = 1;
                 Delay_us(2);
                 Data_Clk = 0;
                 }

           for(l=0;l<=4;l++){
            quotient = arr_large[l];
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(5);
                             Data_Clk = 0;
                             Delay_us(5);
                             }
                 Data_Clk = 1;
                 Delay_us(5);
                 Data_Clk = 0;

                 Select_Clk = 1;
                 Delay_us(5);
                 Select_DS = 0;
                 Select_Clk = 0;
                 Delay_ms(1000);
                           quotient = 255;
                           i=1;
                           while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                           for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(2);
                             Data_Clk = 0;
                             Delay_us(2);
                             }
                 Data_Clk = 1;
                 Delay_us(2);
                 Data_Clk = 0;

                 }



           for(l=0;l<=6;l++){
            quotient = arr_med[l];
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(5);
                             Data_Clk = 0;
                             Delay_us(5);
                             }
                 Data_Clk = 1;
                 Delay_us(5);
                 Data_Clk = 0;

                 Select_Clk = 1;
                 Delay_us(5);
                 Select_DS = 0;
                 Select_Clk = 0;
                 Delay_ms(1000);


            quotient = 255;
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(2);
                             Data_Clk = 0;
                             Delay_us(2);
                             }
                 Data_Clk = 1;
                 Delay_us(2);
                 Data_Clk = 0;

          }
            //Delay_us(5);
         }
}

- - - Updated - - -

Hi all,

i am facing new issue in above project. When i display the data on particular FND , data displays perfectly however remaining segments of FND also glows little bit. Why is this happening ? After displaying the data i am sending one blanking pulse too/, but issue still remains same. Can u guys plz guide me. I cannot change the hardware. Code is as follows

#define Select_DS     PORTD.B7
#define Select_Clk     PORTD.B6
#define Data_DS       PORTD.B5
#define Data_Clk      PORTD.B4
#define Relay         PORTD.B3
#define Buzzer        PORTD.B2

 // unsigned long int k=0,i=0,j=0,l=0;
 unsigned int arr_small[10] = {24,222,52,148,210,145,17,220,16,144};
 unsigned  int arr_large[10] = {17,125,35,37,77,133,129,61,1,5};
 unsigned  int arr_med[10] = {20,126,140,44,102,37,5,124,4,36};
 //unsigned  int Select_FND[12] = {16,32,64,128,256,512,1024,2048,4096,8192,16384,32768};
 unsigned int  decimalNumber,remainder,quotient,decimalNumber_1,remainder_1,quotient_1;
 unsigned int  binaryNumber[100],binaryNumber_1[100],i=1,j,k,l=0,m=0,q=0;


void main()
{

          TRISD = 0x00;

          Select_Clk = 0;
          Select_DS = 1;
          Delay_us(5);

          while(1){
          Select_DS = 1;
          Delay_us(5);

            for(l=0;l<=4;l++){
            quotient = arr_small[l];
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(5);
                             Data_Clk = 0;
                             Delay_us(5);
                             }
                 Data_Clk = 1;
                 Delay_us(5);
                 Data_Clk = 0;

                 Select_Clk = 1;
                 Delay_us(5);
                 Select_DS = 0;
                 Select_Clk = 0;
                 Delay_ms(1000);
                 
                           quotient = 255;                          //Data for blanking
                           i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(2);
                             Data_Clk = 0;
                             Delay_us(2);
                             }
                 Data_Clk = 1;
                 Delay_us(2);
                 Data_Clk = 0;
                 }

           for(l=0;l<=4;l++){
            quotient = arr_large[l];
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(5);
                             Data_Clk = 0;
                             Delay_us(5);
                             }
                 Data_Clk = 1;
                 Delay_us(5);
                 Data_Clk = 0;

                 Select_Clk = 1;
                 Delay_us(5);
                 Select_DS = 0;
                 Select_Clk = 0;
                 Delay_ms(1000);
                           quotient = 255;
                           i=1;
                           while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                           for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(2);
                             Data_Clk = 0;
                             Delay_us(2);
                             }
                 Data_Clk = 1;
                 Delay_us(2);
                 Data_Clk = 0;

                 }



           for(l=0;l<=6;l++){
            quotient = arr_med[l];
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(5);
                             Data_Clk = 0;
                             Delay_us(5);
                             }
                 Data_Clk = 1;
                 Delay_us(5);
                 Data_Clk = 0;

                 Select_Clk = 1;
                 Delay_us(5);
                 Select_DS = 0;
                 Select_Clk = 0;
                 Delay_ms(1000);


            quotient = 255;
            i=1;
                     while(quotient!=0){
                             binaryNumber[i++]= quotient % 2;
                             quotient = quotient / 2;
                             }
                             for(i=i;i<=8;i++)
                             {
                                 binaryNumber[i] = 0;
                             }

                      for(j = i-1;j> 0;j--){
                             Data_DS = binaryNumber[j];
                             Data_Clk = 1;
                             Delay_us(2);
                             Data_Clk = 0;
                             Delay_us(2);
                             }
                 Data_Clk = 1;
                 Delay_us(2);
                 Data_Clk = 0;

          }
            //Delay_us(5);
         }
}

 

[djc]

Hi,

Guys plz help!!!

 

[djc]

Hello,

Can anybody plz help!!!