Accessing Individual Bits
The mikroC PRO for PIC allows you to access individual bits of 8-bit variables. It also supports sbit and bit data types

Lets use the Global Interrupt Bit (GIE) as an example. This bit is defined in the definition file of the particular MCU as :

const register unsigned short int GIE = 7;
sbit GIE_bit at INTCON.B7;To access this bit in your code by its name, you can write something like this:

// Clear Global Interrupt Bit (GIE)
INTCON.GIE = 0;In this way, if GIE bit changes its position in the register, you are sure that the appropriate bit will be affected.
But, if GIE bit is not located in the designated register, you may get errors.

Another way of accesing bits is by using the direct member selector (.) with a variable, followed by one of identifiers B0, B1, … , B7, or F0, F1, … F7, with F7 being the most significant bit, to access the desired bit :

// Clear bit 0 in INTCON register
INTCON.B0 = 0;

// Set bit 5 in ADCON0 register
ADCON0.F5 = 1;
In this way, if the target bit changes its position in the register, you cannot be sure that you are invoking the appropriate bit.

This kind of selective access is an intrinsic feature of mikroC PRO for PIC and can be used anywhere in the code. Identifiers B0–B7 are not case sensitive and have a specific namespace. You may override them with your own members B0–B7 within any given structure.

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

Also, you can access the desired bit by using its alias name, in this case GIE_bit :

// Set Global Interrupt Bit (GIE)
GIE_bit = 1;In this way, if the GIE bit changes its register or position in the register, you are sure that the appropriate bit will be affected.

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

sbit type
The mikroC PRO for PIC compiler has sbit data type which provides access to registers, SFRs, variables, etc.
You can declare a sbit varible 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 the main program unit
In the main program you have to specify to which register this sbit points to, for example:

sbit Abit at PORTB.F0; // 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.
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 example in the main program unit
char MyVar;
sbit AnotherBit at MyVar.F0; // this is where AnotherBit is fully defined
...
void main() {
...
}
at keyword
You can use the keyword "at" to make an alias to a variable, for example, you can write a library without using register names, and later in the main program to define those registers, for example:

extern char PORTAlias; // here in the library we can use its symbolic name
char PORTAlias at PORTB; // this is where PORTAlias is fully defined
...
void main() {
...
}
Note: Bear in mind that when using at operator in your code over a variable defined through a extern modifier, appropriate memory specifer must be appended also.

bit type
The mikroC PRO for PIC compiler provides a bit data type that may be used for variable declarations. It can not be used for argument lists, and function-return values.

bit bf; // bit variableThere are no pointers to bit variables:

bit *ptr; // invalidAn array of type bit is not valid:

bit arr [5]; // invalid Note :
Bit variables can not be initialized.
Bit variables can not be members of structures and unions.
Bit variables do not have addresses, therefore unary operator & (address of) is not applicable to these variables