Re: [Sdcc-user] RE: [Sdcc-user]Serial.c hex file doesn't work (Part II)

[Emanuel M. <em...@bi...>]

In sdcc it has to be:

sfr at 0x89 TMOD;

and so on. See Chapter 3.4.5 of sdcc manual.

Eric Rector wrote:

>Here is a code snip-it from the second part of my question:
>
>sfr  TMOD =3D 0x89;
>sfr  SCON =3D 0x98;
>
>sfr  SBUF =3D 0x99;
>sbit TR1  =3D 0x8e;
>sbit TI   =3D 0x99;
>
>sfr  TH1  =3D 0x8D;
>sfr  PCON =3D 0x87;
>
>#define SMOD   0x80
>
>void main(void)
>{
>	SCON =3D 0x50;
>	TMOD =3D 0x20;
>
>	TH1  =3D 0xff;
>	PCON =3D SMOD;
>
>	TR1  =3D 1;
>	TI   =3D 1;
>
>	while(1)
>	{
>		while(TI!=3D1);
>		TI =3D 0;
>		SBUF =3D 0x41;
>	}
>}
>
>XTAL =3D 11.0582 mhz
>
>I compiled using:
>
> =20
>
>>sdcc serial.c -mmcs51 --model-small -V
>>   =20
>>
>+ C:\SDCC\bin\sdcpp.exe -nostdinc -Wall -std=3Dc99 -DSDCC=3D1 -DSDCC_MOD=
EL_SMALL
> -DSDCC_mcs51 -D__mcs51 -I"C:\SDCC\bin\..\include"  "serial.c"
>+ C:\SDCC\bin\asx8051.exe -plosgff "serial.asm"
>+ C:\SDCC\bin\aslink.exe -nf "serial"
>
>Again, I am using the atmel at89s8252. This code works with keil, so I t=
hink
>i'm using sdcc incorrectly.  I've read the doc two times just incase i
>missed something the first time.  But ???
>
>Thanks
>
>Eric
>
>-----Original Message-----
>From: sdc...@li...
>[mailto:sdc...@li...]On Behalf Of Eric Rector
>Sent: Thursday, July 17, 2003 9:17 AM
>To: sdc...@li...
>Subject: [Sdcc-user] Hex file too big.
>
>
>Hallo,
>
>I have be currently been using the Keil eval IDE for programming my
>at89s8252.  At first Keil severed its purpose well (Thanks Keil).  Now I
>need more functionality than the Keil eval version can deliver.  I have
>installed sdcc and mingw (al latest snapshots).  Everything works wonder=
ful
>except the fact that the asm file sdcc produces from "void main(void){;}=
" is
>to big.  It seems there is a lot of extra code I don't want, nor really
>need,  I know that there are compiler opts '-nooverlay', '#pragma NOIV' =
and
>others options to eliminate some of this 'extra' code, but the end resul=
t is
>still a lot of code extra code.
>
>Q1: What is the smallest asm file that can be produced for the program
>above? or hex file only adding up how many bits are writen to the chip?
>
>I also have a small c program that prints a's to the serial port.  If I
>compile it with Keil, download the hex file to the =B5Proc, it works.  B=
ut
>when I do the same procedure only compiling the code with sdcc it won't
>work. I used the s1 simulator and it also verifies that the keil hex fil=
e
>works and the sdcc hex file doesn't
>
>Q2: Has anyone had this same experience?
>
>Q3: Does anyone have any suggestions?
>
>Thank you to whom ever replies.
>
>Eric
>
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