Mikroelektronika MIKROE-738 Datenbogen

mikroC PRO for PIC32

MikroElektronika

139

Note: If aiming at portability, avoid this style of accessing individual bits, use the bit fields instead. 

See Predefined Globals and Constants for more information on register/bit names.

sbit type

The mikroC PRO for PIC32 compiler has 

sbit

 data type which provides access to registers, SFRs, variables, etc. 

You can declare a

 sbit

 variable in a unit in such way that it points to a specific bit in SFR register:

extern sfr sbit Abit; // Abit is precisely defined in some external file, for example in 

In the main program you have to specify to which register this sbit points to, for example:

sbit Abit at PORTB.B0; // this is where Abit is fully defined

...

void main() {  

...

}

In this way the variable 

Abit

 will actually point to PORTB.0. Please note that we used the keyword 

sfr

 for declaration 

of 

Abit

, because we are pointing it to PORTB which is defined as a 

sfr

 variable.

Note: Declaring a 

sbit

 variable is not possible via 

F0, F1, … F31

 identifiers. 

In case we want to declare a bit over a variable which is not defined as 

sfr

, then the keyword 

sfr

 is not necessary, 

for example: 

extern  sbit  AnotherBit;  //  AnotherBit  is  precisely  defined  in  some  external  file,  for 

char MyVar;

sbit AnotherBit at MyVar.B0; // this is where AnotherBit is fully defined

...

void main() {  

...

}