to set a bit

[srikanthind]

i got a very basic doubt, i could not find all list of instructions, is there any instruction or datatype to set a particular pin in pic c (like BSF in assemble ), I tried with sbit, it didn't work.


could you give me the link where i can find the all instructions.

thank you

 

[dougy83]

I'm assuming you're using a PIC... here's an example:

to set bit 5 of PORTB, you can use:
PORTB |= (1<<5);

to clear bit 7 of PORTB, you can use:
PORTB &= ~(1<<7);

The operators in C/C++ are listed here: https://en.wikipedia.org/wiki/Operators_in_C_and_C++

 

[Ian Rogers]

Depends on the bit.... If its an SFR its been defined ie.. PORTA has RA0, RA1, RA2...etc

Or you can specify PORTB.RB1 etc...

If you need to specify undefined bits in a byte.... Then you need to create a struct or union to access them

struct {
    unsigned mybit1:1;   // 1 bit
    unsigned mybit2:1;
    unsigned mybit3:1;
    unsigned mybits4:2;   // 2 bits
    unsigned mybits5:3;  // 3 bits
  };
} MYBYTEbits;

 

[srikanthind]

thank you mate...

 

[srikanthind]

thank you

Depends on the bit.... If its an SFR its been defined ie.. PORTA has RA0, RA1, RA2...etc

Or you can specify PORTB.RB1 etc...

If you need to specify undefined bits in a byte.... Then you need to create a struct or union to access them

struct {
    unsigned mybit1:1;   // 1 bit
    unsigned mybit2:1;
    unsigned mybit3:1;
    unsigned mybits4:2;   // 2 bits
    unsigned mybits5:3;  // 3 bits
  };
} MYBYTEbits;

 

[srikanthind]

thank you mate..

I'm assuming you're using a PIC... here's an example:

to set bit 5 of PORTB, you can use:
PORTB |= (1<<5);

to clear bit 7 of PORTB, you can use:
PORTB &= ~(1<<7);

The operators in C/C++ are listed here: https://en.wikipedia.org/wiki/Operators_in_C_and_C++