I just solved the problem, which comes from the
way I set the fuses of my pic. I have not yet totally
understand what was going wrong, and will have
a look at it tomorrow.
For now, I took a look at the gpdasm of the working
hex file generated by mc18 and used the configuration
values as follow:
#include <pic18fregs.h>
code char at __CONFIG1L _conf0 = 0x00;
code char at __CONFIG1H _conf1 = 0x0a;
code char at __CONFIG2L _conf2 = 0x00;
code char at __CONFIG2H _conf3 = 0x1e;
/* #define __CONFIG3L 0x300004 */
/* code char at __CONFIG3L _conf4 = 0x00; */
code char at __CONFIG3H _conf5 = 0x01;
code char at __CONFIG4L _conf6 = 0x81;
/* #define __CONFIG4H 0x300007 */
/* code char at __CONFIG4H _conf7 = 0x00; */
/* code char at __CONFIG5L _conf8 = 0x00; */
/* code char at __CONFIG5H _conf9 = 0x1e; */
/* code char at __CONFIG6L _confa = 0x81; */
/* code char at __CONFIG6H _confb = 0x00; */
void main(void)
{
int i;
long j;
TRISA = 0;
LATAbits.LATA0 = 0;
i = 0;
while (1)
{
LATAbits.LATA0 = i;
i ^= 1;
for (j = 0; j < 2000; ++j)
;
}
}
I dont like this approach but it allows me to go forward with
open source tools.
Thanks for your help,
2008/11/26 lementec fabien <[EMAIL PROTECTED]>
> sorry, I didnot paste the right hex file.
> here is the one:
>
> :020000040000FA
> :0400000015EF00F008
> :06002A00F86AA68EA69CF8
> :100030000F0EC16E070EB46E926A8980899200011C
> :10004000626B0001636B23EF00F0010058000000B9
> :0C00500060000000040000000000000040
> :020000040030CA
> :0E000000E03EF8E0FFFC9AFFFFFFFF9FFFFFCE
> :00000001FF
>
> generated from the following c code:
>
> void _entry(void) __naked __interrupt 0;
> void foo(void) __naked;
>
>
> void _entry(void) __naked __interrupt 0
> {
> __asm
> goto _foo
> __endasm ;
> }
>
>
> void foo (void) __naked
> {
> static int i = 0;
> static int j = 0;
>
> __asm
> clrf _TBLPTRU, 0
> bsf 0xa6, 7, 0
> bcf 0xa6, 6, 0
> __endasm;
>
> ADCON1 = 0x0f;
> CMCON = 7;
>
> TRISA = 0;
>
> LATAbits.LATA0 = 1;
> LATAbits.LATA1 = 0;
>
> j = 0;
>
> for (; ; )
> ;
> }
>
> Do you see anything else I could look at?
>
> 2008/11/26 lementec fabien <[EMAIL PROTECTED]>
>
> Thank you very much for helping, but the above
>> advices dont work.
>> Regarding the leds and the hw configuration I use,
>> I guess it works since flashing a HEX compiled with
>> the microchip mc18 compiler behaves correctly (ie.
>> leds are blinking).
>> I took a look at the HEX generated by sdcc, and it
>> is much more smaller than the one from mc tools, is
>> it something wrong with that?
>> Here are the contents:
>>
>> :020000040000FA
>> :0400000080EF00F09D
>> :06002A00D9CFE5FFE1CF94
>> :10003000D9FF00C0E5FF01C0E5FF02C0E5FF03C036
>> :10004000E5FF04C0E5FF05C0E5FF06C0E5FF07C00A
>> :10005000E5FF020EDBCF00F0030EDBCF01F0040E54
>> :10006000DBCF02F0050EDBCF03F000C004F001C0CF
>> :1000700005F002C006F003C007F0FF0E0026FF0ED9
>> :100080000122FF0E0222FF0E03220450051006106B
>> :100090000710D8B462EF00F0FF0E046E056A066A1E
>> :1000A000076AFF0E0426FF0E0522FF0E0622FF0E32
>> :1000B00007220450051006100710D8A451EF00F0D5
>> :1000C00035EF00F0E4CF07F0E4CF06F0E4CF05F021
>> :1000D000E4CF04F0E4CF03F0E4CF02F0E4CF01F08A
>> :1000E000E4CF00F0E4CFD9FF12000F0EC16E070E6F
>> :1000F000B46E92909292809080827DEF00F0120018
>> :1001000012EE3FF022EE3FF0F86AA68EA69C75EC48
>> :0401100000F0FFD725
>> :020000040030CA
>> :0E000000E03EF8E0FFFC9AFFFFFFFF9FFFFFCE
>> :00000001FF
>>
>> I really appreciate your help, I want to use an open source
>> compilation suite for learning pic programming, and not
>> install wine + mc tools... doing so would not help in testing
>> and improving sdcc.
>>
>> Thanks,
>>
>> 2008/11/26 Vaclav Peroutka <[EMAIL PROTECTED]>
>>
>> If it did not help, you have problem somewhere else. Check following:
>>> - correct voltage on PIC
>>> - if LED is correctly polarized
>>> - do you use blocking capacitor on PIC's power pins ?
>>> - do you have oscilaltor correctly set (try internal OSC)
>>>
>>> About month ago I had problem with unstable UART. It was because I used
>>> too low voltage and highest speed. PIC did not supported it.
>>>
>>> V.
>>>
>>> > ------------ Původní zpráva ------------
>>> > Od: lementec fabien <[EMAIL PROTECTED]>
>>> > Předmět: Re: [Sdcc-user] [ pic18f, simple program, no crt ]
>>> > Datum: 25.11.2008 20:24:16
>>> > ----------------------------------------
>>> > Hi,
>>> >
>>> > Thanks foro you help but it didnot make the program
>>> > work. I use the following to compile the single file program:
>>> >
>>> > sdcc -mpic16 -p18f4550 -D_SDCC -Dpic18f4550 --no-crt main.c
>>> >
>>> > Any suggestion?
>>> >
>>> > Thanks for helping,
>>> >
>>> > On Mon, Nov 24, 2008 at 6:25 PM, Raphael Neider <[EMAIL PROTECTED]>
>>> wrote:
>>> >
>>> > > > I am trying to make the following code
>>> > > > work when compiled by sdcc for pic18f4550
>>> > > > with --no-crt.
>>> > > >
>>> > > > I take care not using stack, but I guess thi is
>>> > > > not a problem given the way sdcc works.
>>> > > >
>>> > > > It compiles, but at run time my led is not switched
>>> > > > on (the led works well)
>>> > > >
>>> > > > Could you tell me if there is something wrong with
>>> > > > the code?
>>> > >
>>> > > You need to add
>>> > >
>>> > > #include <pic18fregs.h>
>>> > > __code char __at(__CONFIG4L) __conf4l = _ENHCPU_OFF_4L;
>>> > >
>>> > > at the top of your code to disable the extended instruction set.
>>> > >
>>> > > Hope that helps,
>>> > > Raphael
>>> > >
>>> > >
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>>> >
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