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Message

Re: Problem with GNUARM 3.4.3

2005-02-15 by Rick Collins

Why don't you ask this in the gnuarm group?  

http://groups.yahoo.com/group/gnuarm

There are tons of good people who can likely answer your question. 

Also, I am curious, which web site did you use to download the code? 
Did you do your own compile of the tools?  


--- In lpc2000@yahoogroups.com, "Anton Erasmus" <antone@s...> wrote:
> Hi,
> 
> I have installed the latest GNUARM which is based on gcc 3.4.3.
> I downloaded the UT040803A.zip uart example from the files
> area. 
> I compiled and downloaded the code to a LPC2292 board. The code
> runs as expected except for one thing. In stead of printing "Hello
World!",
> it displays garbage.
> The main routine is as follows:
> 
> int main(void)
> {
>   uint32_t startTime;
> 
>   sysInit();
> #if defined(UART0_TX_INT_MODE) || defined(UART0_RX_INT_MODE)
>   enableIRQ();
> #endif
>   startTime = getSysTICs();
>   uart0Puts("\r\nHello World!\r\n");
> 
>   for (;;)
>     {
>     do
>       {
>       int ch;
> 
>       if ((ch = uart0Getch()) >= 0)
>         uart0Putch(ch);
>       }
>     while (getElapsedSysTICs(startTime) < HALF_SEC);
> 
>     IOPIN ^= LED2_BIT;
> 
>     startTime += HALF_SEC;
>     }
> 
>   return 0;
> }
> 
> The section after the uart0Puts works. When I press a key on the
serial terminal, it is 
> echoed correctly back. So it seems that the baud rate etc. is
correct. If I compile the 
> code with no optimisation  (Default is set to O2), then it prints
the "Hello World!" as 
> expected. If I add a uart0Putch('U') before the uart0Puts, the U is
printed. If I add more, 
> then sometimes the "Hello World!" is printed correctly. I have
looked in the hex file 
> generated, and the ASCII data is put in the .rodata section as
expected. It looks as if
> the ASCII strings are aligned at 4 byte boundaries, so I do not
think it is an alignment 
> problem.
> Has anyone else had problems with literal strings using gcc 3.4.3 ?
Any suggestions on
> where I can look to find the problem would be appreciated.
> 
> Regards
>    Anton Erasmus
> 
> 
> -- 
> A J Erasmus

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