Hi,
----- Original Message -----
From: "Helvécio Lopes Teixeira" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, 09 January, 2008 9:50 PM
Subject: [Sdcc-user] SET instruction
> Hello,
>
> I wrote this code:
>
> #include <pic16f877.h>
> #define SET(reg,bit) (reg) |= (1<<(bit))
> #define CLR(reg,bit) (reg) &= ~(1<<(bit))
>
> #define LED1 PORTA,0
> #define LED2 PORTA,2
>
> void main() {
> SET(LED1);
> }
>
-------------------------------------------------------------------------
I have been using this in AVR-GCC, but it will work here too.
//-------------------------------------------------------------------------
#define setb(port, bitno) port |= 1<< bitno
#define clrb(port, bitno) port &= ~(1<< bitno)
#define test(port, bitno) ((port & (1<< bitno)) > 0)
#define cplb(port, bitno) port ^= 1<< bitno
#define BVAL(p,b) (b)
#define IO(p,b) (p)
#define SETB(io) setb(IO(io),BVAL(io)) //set the bit
#define CLRB(io) clrb(IO(io), BVAL(io)) //clear the
bit
#define TEST(io) test(IO(io), BVAL(io)) //test the
bit whether 0 or 1.
#define CPLB(io) cplb(IO(io), BVAL(io)) //invert the
bit
/* Once you have done this, you can say: */
#define LED PORTA, 2
/* And in your code say: */
SETB(LED); //led on
//or,
//setb(PORTA, 2);
CLRB(LED); //led off
TEST(LED) //check whether ON or OFF
CPLB(LED) //toggle led.
//---------------------------------------------------
// Hope this helpd.
--Royce.
-------------------------------------------------------------------------
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