Bit manipulation, ascii with binary

-1

How does one apply bit manipulation (AND clear, OR set and perhaps XOR to examine) to each bit in a binary? What I would like to do is input a character or string and output the message in binary to a specific output pin on my MCU. I want to use bit manipulation because creating a function for each character on the ascii table would take lots of memory on my MCU.

How is see so far is that I have set the pin output and declared each bit as a variable. Does this make sense so far?

void bits (void)

{

    #define RSTEST PORTBbits.RB5 //Declaring the port for serial

    #define RSOUT   TRISBbits.RB5 = 0 //Sets the port RB5 as an output



    unsigned int b0 = 0 ; // Binary 00000000

    unsigned int b1 = 0 ;

    unsigned int b2 = 0 ;

    unsigned int b3 = 0 ;

    unsigned int b4 = 0 ;

    unsigned int b5 = 0 ;

    unsigned int b6 = 0 ;

    unsigned int b7 = 0 ;



}

The reason I am trying to do this is because writing a function for each ASCII code is long and uncessary memory space.

void main(void)

{



      while (1)

    {

             RSTEST ; // same config as above

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 1 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 1 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 1 ; // 5

//           __delay_us(25);

//           RSOUT = 1 ; // 6

//           __delay_us(25);

//           RSOUT = 0 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 1 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 1 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP



    }

}

All those lines just to print JOE.

Can I just something similar to printf("JOE");

I do not want to use Tx and Rx Hardware EUSART but Software EUSART.

asked Nov 15 '18 at 14:52

M2T156

215

Use >>= shift to iterate over bits. while (val) { output(val & 1); val >>= 1; }

– Kamil Cuk
Nov 15 '18 at 14:55

How do you mean?

– M2T156
Nov 15 '18 at 15:18

Why don't use the hardware UART? A lott of PIC will support it.

– Mike
Nov 16 '18 at 6:41

Because I want to experiment with software UART.

– M2T156
Nov 16 '18 at 7:36

add a comment |

-1

How is see so far is that I have set the pin output and declared each bit as a variable. Does this make sense so far?

void bits (void)

{

    #define RSTEST PORTBbits.RB5 //Declaring the port for serial

    #define RSOUT   TRISBbits.RB5 = 0 //Sets the port RB5 as an output



    unsigned int b0 = 0 ; // Binary 00000000

    unsigned int b1 = 0 ;

    unsigned int b2 = 0 ;

    unsigned int b3 = 0 ;

    unsigned int b4 = 0 ;

    unsigned int b5 = 0 ;

    unsigned int b6 = 0 ;

    unsigned int b7 = 0 ;



}

The reason I am trying to do this is because writing a function for each ASCII code is long and uncessary memory space.

void main(void)

{



      while (1)

    {

             RSTEST ; // same config as above

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 1 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 1 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 1 ; // 5

//           __delay_us(25);

//           RSOUT = 1 ; // 6

//           __delay_us(25);

//           RSOUT = 0 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 1 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 1 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP



    }

}

All those lines just to print JOE.

Can I just something similar to printf("JOE");

I do not want to use Tx and Rx Hardware EUSART but Software EUSART.

asked Nov 15 '18 at 14:52

M2T156

215

Use >>= shift to iterate over bits. while (val) { output(val & 1); val >>= 1; }

– Kamil Cuk
Nov 15 '18 at 14:55

How do you mean?

– M2T156
Nov 15 '18 at 15:18

Why don't use the hardware UART? A lott of PIC will support it.

– Mike
Nov 16 '18 at 6:41

Because I want to experiment with software UART.

– M2T156
Nov 16 '18 at 7:36

add a comment |

-1

How is see so far is that I have set the pin output and declared each bit as a variable. Does this make sense so far?

void bits (void)

{

    #define RSTEST PORTBbits.RB5 //Declaring the port for serial

    #define RSOUT   TRISBbits.RB5 = 0 //Sets the port RB5 as an output



    unsigned int b0 = 0 ; // Binary 00000000

    unsigned int b1 = 0 ;

    unsigned int b2 = 0 ;

    unsigned int b3 = 0 ;

    unsigned int b4 = 0 ;

    unsigned int b5 = 0 ;

    unsigned int b6 = 0 ;

    unsigned int b7 = 0 ;



}

The reason I am trying to do this is because writing a function for each ASCII code is long and uncessary memory space.

void main(void)

{



      while (1)

    {

             RSTEST ; // same config as above

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 1 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 1 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 1 ; // 5

//           __delay_us(25);

//           RSOUT = 1 ; // 6

//           __delay_us(25);

//           RSOUT = 0 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 1 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 1 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP



    }

}

All those lines just to print JOE.

Can I just something similar to printf("JOE");

I do not want to use Tx and Rx Hardware EUSART but Software EUSART.

asked Nov 15 '18 at 14:52

M2T156

215

How is see so far is that I have set the pin output and declared each bit as a variable. Does this make sense so far?

void bits (void)

{

    #define RSTEST PORTBbits.RB5 //Declaring the port for serial

    #define RSOUT   TRISBbits.RB5 = 0 //Sets the port RB5 as an output



    unsigned int b0 = 0 ; // Binary 00000000

    unsigned int b1 = 0 ;

    unsigned int b2 = 0 ;

    unsigned int b3 = 0 ;

    unsigned int b4 = 0 ;

    unsigned int b5 = 0 ;

    unsigned int b6 = 0 ;

    unsigned int b7 = 0 ;



}

The reason I am trying to do this is because writing a function for each ASCII code is long and uncessary memory space.

void main(void)

{



      while (1)

    {

             RSTEST ; // same config as above

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 1 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 1 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 0 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 0 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 1 ; // 5

//           __delay_us(25);

//           RSOUT = 1 ; // 6

//           __delay_us(25);

//           RSOUT = 0 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP

//           

//           RSOUT = 1 ; // MSB

//           __delay_ms(10); 

//           RSOUT = 0 ; // START

//           __delay_us(25);

//           RSOUT = 1 ; // 1

//           __delay_us(25);

//           RSOUT = 0 ; // 2

//           __delay_us(25);

//           RSOUT = 1 ; // 3

//           __delay_us(25);

//           RSOUT = 0 ; // 4

//           __delay_us(25);

//           RSOUT = 0 ; // 5

//           __delay_us(25);

//           RSOUT = 0 ; // 6

//           __delay_us(25);

//           RSOUT = 1 ; // 7

//           __delay_us(25);

//           RSOUT = 0 ; // 8

//           __delay_us(25);

//           RSOUT = 1 ; // STOP



    }

}

All those lines just to print JOE.

Can I just something similar to printf("JOE");

I do not want to use Tx and Rx Hardware EUSART but Software EUSART.

c pic

asked Nov 15 '18 at 14:52

M2T156

215

asked Nov 15 '18 at 14:52

M2T156

215

asked Nov 15 '18 at 14:52

M2T156

215

asked Nov 15 '18 at 14:52

M2T156

215

asked Nov 15 '18 at 14:52

M2T156

215

Use >>= shift to iterate over bits. while (val) { output(val & 1); val >>= 1; }

– Kamil Cuk
Nov 15 '18 at 14:55

How do you mean?

– M2T156
Nov 15 '18 at 15:18

Why don't use the hardware UART? A lott of PIC will support it.

– Mike
Nov 16 '18 at 6:41

Because I want to experiment with software UART.

– M2T156
Nov 16 '18 at 7:36

add a comment |

Use >>= shift to iterate over bits. while (val) { output(val & 1); val >>= 1; }

– Kamil Cuk
Nov 15 '18 at 14:55

How do you mean?

– M2T156
Nov 15 '18 at 15:18

Why don't use the hardware UART? A lott of PIC will support it.

– Mike
Nov 16 '18 at 6:41

Because I want to experiment with software UART.

– M2T156
Nov 16 '18 at 7:36

Use >>= shift to iterate over bits. while (val) { output(val & 1); val >>= 1; }

– Kamil Cuk
Nov 15 '18 at 14:55

How do you mean?

– M2T156
Nov 15 '18 at 15:18

Why don't use the hardware UART? A lott of PIC will support it.

– Mike
Nov 16 '18 at 6:41

Because I want to experiment with software UART.

– M2T156
Nov 16 '18 at 7:36

add a comment |

1 Answer
1

active

oldest

votes

I think you need a function like this, using MSB first:

#define MSB 1

#define LSB 0



void out_char(char character, char bit_order){



  uint8_t i = 0;

  RSOUT = 1 ; // MSB

  __delay_ms(10); 

  RSOUT = 0 ; // START

  __delay_us(25);

  for (i = 8; i>0; --i){

      if (bit_order){

        RSOUT = (character & 0x80) ? 1:0;

        character <<= 1;

      } else {

        RSOUT = (character & 0x01);

        character >>= 1;

      }

      __delay_us(25);

  }

  RSOUT = 1 ; // STOP



}



void out_str(char * string, uint8_t len, char bit_order){

  uint8_t i = 0;

  for (i = 0; i< len; i++){

    out_char(string[i], bit_order);

  }

}



out_str("Hello world",11, MSB); // 'H' 0x48 will be '0-1-0-0-1-0-0-0'    

out_str("Hello world",11, LSB); // 'H' 0x48 will be '0-0-0-1-0-0-1-0'

edited Nov 15 '18 at 15:59

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

I will give this a try. Is that just for character? How it be for a string like a sentence?

– M2T156
Nov 15 '18 at 15:05

It works very well for characters but not strings.

– M2T156
Nov 15 '18 at 15:17

you can iterate, knowing the length of the string. I edited the answer.

– gustavovelascoh
Nov 15 '18 at 15:24

Hi Gustav, I cannot see any difference so far. How would you do it say for example, print a sentence "Hello World"?

– M2T156
Nov 15 '18 at 15:26

Yes I have it now. I will try and let you know in a few mins.

– M2T156
Nov 15 '18 at 15:28

|
show 11 more comments

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

I think you need a function like this, using MSB first:

#define MSB 1

#define LSB 0



void out_char(char character, char bit_order){



  uint8_t i = 0;

  RSOUT = 1 ; // MSB

  __delay_ms(10); 

  RSOUT = 0 ; // START

  __delay_us(25);

  for (i = 8; i>0; --i){

      if (bit_order){

        RSOUT = (character & 0x80) ? 1:0;

        character <<= 1;

      } else {

        RSOUT = (character & 0x01);

        character >>= 1;

      }

      __delay_us(25);

  }

  RSOUT = 1 ; // STOP



}



void out_str(char * string, uint8_t len, char bit_order){

  uint8_t i = 0;

  for (i = 0; i< len; i++){

    out_char(string[i], bit_order);

  }

}



out_str("Hello world",11, MSB); // 'H' 0x48 will be '0-1-0-0-1-0-0-0'    

out_str("Hello world",11, LSB); // 'H' 0x48 will be '0-0-0-1-0-0-1-0'

edited Nov 15 '18 at 15:59

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

I will give this a try. Is that just for character? How it be for a string like a sentence?

– M2T156
Nov 15 '18 at 15:05

It works very well for characters but not strings.

– M2T156
Nov 15 '18 at 15:17

you can iterate, knowing the length of the string. I edited the answer.

– gustavovelascoh
Nov 15 '18 at 15:24

Hi Gustav, I cannot see any difference so far. How would you do it say for example, print a sentence "Hello World"?

– M2T156
Nov 15 '18 at 15:26

Yes I have it now. I will try and let you know in a few mins.

– M2T156
Nov 15 '18 at 15:28

|
show 11 more comments

I think you need a function like this, using MSB first:

#define MSB 1

#define LSB 0



void out_char(char character, char bit_order){



  uint8_t i = 0;

  RSOUT = 1 ; // MSB

  __delay_ms(10); 

  RSOUT = 0 ; // START

  __delay_us(25);

  for (i = 8; i>0; --i){

      if (bit_order){

        RSOUT = (character & 0x80) ? 1:0;

        character <<= 1;

      } else {

        RSOUT = (character & 0x01);

        character >>= 1;

      }

      __delay_us(25);

  }

  RSOUT = 1 ; // STOP



}



void out_str(char * string, uint8_t len, char bit_order){

  uint8_t i = 0;

  for (i = 0; i< len; i++){

    out_char(string[i], bit_order);

  }

}



out_str("Hello world",11, MSB); // 'H' 0x48 will be '0-1-0-0-1-0-0-0'    

out_str("Hello world",11, LSB); // 'H' 0x48 will be '0-0-0-1-0-0-1-0'

edited Nov 15 '18 at 15:59

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

I will give this a try. Is that just for character? How it be for a string like a sentence?

– M2T156
Nov 15 '18 at 15:05

It works very well for characters but not strings.

– M2T156
Nov 15 '18 at 15:17

you can iterate, knowing the length of the string. I edited the answer.

– gustavovelascoh
Nov 15 '18 at 15:24

Hi Gustav, I cannot see any difference so far. How would you do it say for example, print a sentence "Hello World"?

– M2T156
Nov 15 '18 at 15:26

Yes I have it now. I will try and let you know in a few mins.

– M2T156
Nov 15 '18 at 15:28

|
show 11 more comments

I think you need a function like this, using MSB first:

#define MSB 1

#define LSB 0



void out_char(char character, char bit_order){



  uint8_t i = 0;

  RSOUT = 1 ; // MSB

  __delay_ms(10); 

  RSOUT = 0 ; // START

  __delay_us(25);

  for (i = 8; i>0; --i){

      if (bit_order){

        RSOUT = (character & 0x80) ? 1:0;

        character <<= 1;

      } else {

        RSOUT = (character & 0x01);

        character >>= 1;

      }

      __delay_us(25);

  }

  RSOUT = 1 ; // STOP



}



void out_str(char * string, uint8_t len, char bit_order){

  uint8_t i = 0;

  for (i = 0; i< len; i++){

    out_char(string[i], bit_order);

  }

}



out_str("Hello world",11, MSB); // 'H' 0x48 will be '0-1-0-0-1-0-0-0'    

out_str("Hello world",11, LSB); // 'H' 0x48 will be '0-0-0-1-0-0-1-0'

edited Nov 15 '18 at 15:59

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

I think you need a function like this, using MSB first:

#define MSB 1

#define LSB 0



void out_char(char character, char bit_order){



  uint8_t i = 0;

  RSOUT = 1 ; // MSB

  __delay_ms(10); 

  RSOUT = 0 ; // START

  __delay_us(25);

  for (i = 8; i>0; --i){

      if (bit_order){

        RSOUT = (character & 0x80) ? 1:0;

        character <<= 1;

      } else {

        RSOUT = (character & 0x01);

        character >>= 1;

      }

      __delay_us(25);

  }

  RSOUT = 1 ; // STOP



}



void out_str(char * string, uint8_t len, char bit_order){

  uint8_t i = 0;

  for (i = 0; i< len; i++){

    out_char(string[i], bit_order);

  }

}



out_str("Hello world",11, MSB); // 'H' 0x48 will be '0-1-0-0-1-0-0-0'    

out_str("Hello world",11, LSB); // 'H' 0x48 will be '0-0-0-1-0-0-1-0'

edited Nov 15 '18 at 15:59

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

edited Nov 15 '18 at 15:59

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

answered Nov 15 '18 at 15:00

gustavovelascoh

5301417

I will give this a try. Is that just for character? How it be for a string like a sentence?

– M2T156
Nov 15 '18 at 15:05

It works very well for characters but not strings.

– M2T156
Nov 15 '18 at 15:17

you can iterate, knowing the length of the string. I edited the answer.

– gustavovelascoh
Nov 15 '18 at 15:24

Hi Gustav, I cannot see any difference so far. How would you do it say for example, print a sentence "Hello World"?

– M2T156
Nov 15 '18 at 15:26

Yes I have it now. I will try and let you know in a few mins.

– M2T156
Nov 15 '18 at 15:28

|
show 11 more comments

I will give this a try. Is that just for character? How it be for a string like a sentence?

– M2T156
Nov 15 '18 at 15:05

It works very well for characters but not strings.

– M2T156
Nov 15 '18 at 15:17

you can iterate, knowing the length of the string. I edited the answer.

– gustavovelascoh
Nov 15 '18 at 15:24

Hi Gustav, I cannot see any difference so far. How would you do it say for example, print a sentence "Hello World"?

– M2T156
Nov 15 '18 at 15:26

Yes I have it now. I will try and let you know in a few mins.

– M2T156
Nov 15 '18 at 15:28

I will give this a try. Is that just for character? How it be for a string like a sentence?

– M2T156
Nov 15 '18 at 15:05

It works very well for characters but not strings.

– M2T156
Nov 15 '18 at 15:17

you can iterate, knowing the length of the string. I edited the answer.

– gustavovelascoh
Nov 15 '18 at 15:24

Hi Gustav, I cannot see any difference so far. How would you do it say for example, print a sentence "Hello World"?

– M2T156
Nov 15 '18 at 15:26

Yes I have it now. I will try and let you know in a few mins.

– M2T156
Nov 15 '18 at 15:28

|
show 11 more comments

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