Small Device C Compiler suite

On 25 Nov 2003 19:41:54 +0530, Ravi Kumar <ravivsn@...> wrote:

> Hi All,
> This is my first posting to the list.
> 	MC:AT89C51
>         SDCC : mcs51/gbz80/z80/avr/ds390/pic14 2.3.0 (Sep 20 2001)
> (UNIX)
> To test 89c51 board, I wrote a test program to generate clock on each
> port. I have attached the related c file and hex file.
>
> My problem:  when  loaded onto 89c51 I dont see any response of LEDs
> connected to P2. Observing P2 in oscilloscope shows me square waves on
> each pin of P2 but of different freq.

Looks like your processor is scanning external addresses on P2 (A8 to 
A15), looking for an external programme memory.

Would you mind checking the level of AE\ pin? It should be high if you're 
using the internal flash ROM.

> The same program when I write hex code and download onto 89c51 LEDs are
> blinking and showing same freq, with this obeservation I cannot suspect
> hardware.
> I strongly feel I am missing some thing in startup code or compiler
> options.
>
> sdcc -mmcs51 --model-small -c test.c
> sdcc -mmcs51 --model-small test.rel
> packihx test.ihx > test.hex
>
> Please help me out,
> Thanks in advance,
> Ravi Kumar CH
>



-- 
NEVER jump into a LOOP!

Hi,
There is no external programme memory. And also ALE is not connected.
Any way out!!
Thanks 
Ravi Kumar CH
On Tue, 2003-11-25 at 20:16, Jean-Paul Brodier wrote:
> On 25 Nov 2003 19:41:54 +0530, Ravi Kumar <ravivsn@...> wrote:
> 
> > Hi All,
> > This is my first posting to the list.
> > 	MC:AT89C51
> >         SDCC : mcs51/gbz80/z80/avr/ds390/pic14 2.3.0 (Sep 20 2001)
> > (UNIX)
> > To test 89c51 board, I wrote a test program to generate clock on each
> > port. I have attached the related c file and hex file.
> >
> > My problem:  when  loaded onto 89c51 I dont see any response of LEDs
> > connected to P2. Observing P2 in oscilloscope shows me square waves on
> > each pin of P2 but of different freq.
> 
> Looks like your processor is scanning external addresses on P2 (A8 to 
> A15), looking for an external programme memory.
> 
> Would you mind checking the level of AE\ pin? It should be high if you're 
> using the internal flash ROM.
> 
> > The same program when I write hex code and download onto 89c51 LEDs are
> > blinking and showing same freq, with this obeservation I cannot suspect
> > hardware.
> > I strongly feel I am missing some thing in startup code or compiler
> > options.
> >
> > sdcc -mmcs51 --model-small -c test.c
> > sdcc -mmcs51 --model-small test.rel
> > packihx test.ihx > test.hex
> >
> > Please help me out,
> > Thanks in advance,
> > Ravi Kumar CH
> >
> 
> 
> 
> -- 
> NEVER jump into a LOOP!
> 
> 
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Hi all,
Could any pls tell me what options to set for 
Atmel AT89C51 using built in data memory and program memory with no
external memory.
And start-up code for the same.
Thanks in advance,
Regards,
Ravi Kumar CH
On Thu, 2003-11-27 at 09:42, Ravi Kumar wrote:
> Hi,
> There is no external programme memory. And also ALE is not connected.
> Any way out!!
> Thanks 
> Ravi Kumar CH
> On Tue, 2003-11-25 at 20:16, Jean-Paul Brodier wrote:
> > On 25 Nov 2003 19:41:54 +0530, Ravi Kumar <ravivsn@...> wrote:
> > 
> > > Hi All,
> > > This is my first posting to the list.
> > > 	MC:AT89C51
> > >         SDCC : mcs51/gbz80/z80/avr/ds390/pic14 2.3.0 (Sep 20 2001)
> > > (UNIX)
> > > To test 89c51 board, I wrote a test program to generate clock on each
> > > port. I have attached the related c file and hex file.
> > >
> > > My problem:  when  loaded onto 89c51 I dont see any response of LEDs
> > > connected to P2. Observing P2 in oscilloscope shows me square waves on
> > > each pin of P2 but of different freq.
> > 
> > Looks like your processor is scanning external addresses on P2 (A8 to 
> > A15), looking for an external programme memory.
> > 
> > Would you mind checking the level of AE\ pin? It should be high if you're 
> > using the internal flash ROM.
> > 
> > > The same program when I write hex code and download onto 89c51 LEDs are
> > > blinking and showing same freq, with this obeservation I cannot suspect
> > > hardware.
> > > I strongly feel I am missing some thing in startup code or compiler
> > > options.
> > >
> > > sdcc -mmcs51 --model-small -c test.c
> > > sdcc -mmcs51 --model-small test.rel
> > > packihx test.ihx > test.hex
> > >
> > > Please help me out,
> > > Thanks in advance,
> > > Ravi Kumar CH
> > >
> > 
> > 
> > 
> > -- 
> > NEVER jump into a LOOP!
> > 
> > 
> > -------------------------------------------------------
> > This SF.net email is sponsored by: SF.net Giveback Program.
> > Does SourceForge.net help you be more productive?  Does it
> > help you create better code?  SHARE THE LOVE, and help us help
> > YOU!  Click Here: http://sourceforge.net/donate/
> > _______________________________________________
> > Sdcc-user mailing list
> > Sdcc-user@...
> > https://lists.sourceforge.net/lists/listinfo/sdcc-user
> 
> 
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by: SF.net Giveback Program.
> Does SourceForge.net help you be more productive?  Does it
> help you create better code?  SHARE THE LOVE, and help us help
> YOU!  Click Here: http://sourceforge.net/donate/
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Hi Ravi,

Why dontcha read the 80c51 data sheets first?
You'll find that EA pin is to tied to Vcc for internal program.

No SDCC options are required for internal/external rom. SDCC doesnt care
where your program is. EA state decides that.

If no Xram is used you can use the --no-xinit-opt option in the command
line...again read the SDCC manual first!

Bye,
--Royce.

----- Original Message -----
From: "Ravi Kumar" <ravivsn@...>
To: <sdcc-user@...>
Sent: Thursday, November 27, 2003 9:42 AM
Subject: Re: [Sdcc-user] pls help me to solve this unusual behaviour


> Hi,
> There is no external programme memory. And also ALE is not connected.
> Any way out!!
> Thanks
> Ravi Kumar CH
> On Tue, 2003-11-25 at 20:16, Jean-Paul Brodier wrote:
> > On 25 Nov 2003 19:41:54 +0530, Ravi Kumar <ravivsn@...> wrote:
> >
> > > Hi All,
> > > This is my first posting to the list.
> > > MC:AT89C51
> > >         SDCC : mcs51/gbz80/z80/avr/ds390/pic14 2.3.0 (Sep 20 2001)
> > > (UNIX)
> > > To test 89c51 board, I wrote a test program to generate clock on each
> > > port. I have attached the related c file and hex file.
> > >
> > > My problem:  when  loaded onto 89c51 I dont see any response of LEDs
> > > connected to P2. Observing P2 in oscilloscope shows me square waves on
> > > each pin of P2 but of different freq.
> >
> > Looks like your processor is scanning external addresses on P2 (A8 to
> > A15), looking for an external programme memory.
> >
> > Would you mind checking the level of AE\ pin? It should be high if
you're
> > using the internal flash ROM.
> >
> > > The same program when I write hex code and download onto 89c51 LEDs
are
> > > blinking and showing same freq, with this obeservation I cannot
suspect
> > > hardware.
> > > I strongly feel I am missing some thing in startup code or compiler
> > > options.
> > >
> > > sdcc -mmcs51 --model-small -c test.c
> > > sdcc -mmcs51 --model-small test.rel
> > > packihx test.ihx > test.hex
> > >
> > > Please help me out,
> > > Thanks in advance,
> > > Ravi Kumar CH
> > >
> >
> >
> >
> > --
> > NEVER jump into a LOOP!
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: SF.net Giveback Program.
> > Does SourceForge.net help you be more productive?  Does it
> > help you create better code?  SHARE THE LOVE, and help us help
> > YOU!  Click Here: http://sourceforge.net/donate/
> > _______________________________________________
> > Sdcc-user mailing list
> > Sdcc-user@...
> > https://lists.sourceforge.net/lists/listinfo/sdcc-user
>
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: SF.net Giveback Program.
> Does SourceForge.net help you be more productive?  Does it
> help you create better code?  SHARE THE LOVE, and help us help
> YOU!  Click Here: http://sourceforge.net/donate/
> _______________________________________________
> Sdcc-user mailing list
> Sdcc-user@...
> https://lists.sourceforge.net/lists/listinfo/sdcc-user
>