Can I use a combination of assembly and C to program a PIC ?

[extradeath]

Assembly + C

Dear Friends,

I've some kind of a stupid question,

Can I use a combination of assembly and C to program a PIC 16f877.

In other words, I've a function written in C that I can hardly do it on assembly FFT and I don't know hoe to use C in adjusting the registers. So I want to call the FFT function from an assembly rotine... CAN IT BE DONE....????? PLEASE REPLY AS SOON AS POSSIBLE.....

 

[olemp]

Assembly + C

you can call assembly inside of c and to do that you have to use the c complier that your code has been written...in which c complier it has been written???

 

[btbass]

Assembly + C

You could use the librarian. Make a library with your c function, then you can call it from ass.
PS.
It is very easy to use c to set the registers, as simple as PORTA = 1;
In the h file, all bits are defined, so you can do this, (Using mcc18 compiler)

//------ Read eeprom

unsigned char read_eeprom(unsigned char address)
{
EEADR = address;
EECON1bits.EEPGD = 0;
EECON1bits.RD = 1;
return EEDATA;
}

//------ Write eeprom

void write_eeprom(unsigned char address, unsigned char data)
{
EEADR = address;
EEDATA = data;
EECON1bits.EEPGD = 0;
EECON1bits.WREN = 1;
EECON2 = 0x55;
EECON2 = 0xaa;
EECON1bits.WR = 1;
while(EECON1bits.WR)
;
EECON1bits.WREN = 0;
}

 

[Pavel]

Re: Assembly + C

You can embed assembly code inside your C code. Check out the free BoostC C compiler from **broken link removed**

Pavel

 

[john_a]

Re: Assembly + C

you can write an assembly code in ccs compiler as this
c code
#asm
.
.
.
assembly code
.
.
.
#endasm

 

[ilker]

Assembly + C

there is an ebook touched to this subject,
look this: