From: "Denys Redon" <denys DOT redon AT free DOT fr>
Newsgroups: comp.os.msdos.djgpp
Subject: serial port 2
Date: Wed, 17 Jul 2002 18:57:01 +0200
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To: djgpp AT delorie DOT com
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I try to put on a LED with the serial port with this programm but it doesn't
> work, why?
>
> #include <stdio.h>
> #include <conio.h>
> #include <pc.h>
> /////////////////////
> #define COM1 0x3F8
> /////////////////////
> #define COMx COM1
> #define TxD COMx
> #define RxD COMx
> #define DLLB COMx
> #define IER (COMx+1)
> #define DLHB (COMx+1)
> #define IIR (COMx+2)
> #define FCR (COMx+2)
> #define LCR (COMx+3)
> #define MCR (COMx+4)
> #define LSR (COMx+5)
> #define MSR (COMx+6)
>
>
>
> void initia(void);
> void Init_COM1(void);
>
> int main (void)
>     {
>         initia();
>         getch();
>         return(0);
>     }
>
> void initia(void)
>     {
>         printf("\n-DEBUT-\n");
>         Init_COM1();
>         outportb(COM1+4,0x02);
>     }
>
>  void Init_COM1(void)
>     {
>           outportb(LCR,0x80); // DLAB = 1
>           // 9600 bauds
>           outportb(DLLB,0x0C);
>           outportb(DLHB,0x00);
>           outportb(LCR,0x07);
>     }
>
>
>
>