Re: [ECOS] Eclipse / CDT without Makefile Project

[Michael Jones <mjones at linear dot com>]

Ilija,

What I am doing with MQX is debugging from Flash. If I use a PEMicro JTAG debugger, it is pretty fast to load 128K. My app does not use a lot of memory, so I have not run out of RAM.

If I finally get a JTAG debugger, can I do the same with eCos? That is, debug from Flash?

Mike

On Dec 22, 2012, at 5:09 PM, Ilija Kocho <ilijak@siva.com.mk> wrote:

> Hi Mike
> 
> My insight in Eclipse is limited so I hope somebody else will hint us
> how to get the console I/O.
> 
> Regarding the target issues, see my comment below. Here I will only say
> that for with respect to Redboot this is a small memory system and the
> application size is limited. That is the reason why I didn't provide RAM
> startup for systems without external memory.
> 
> Ilija
> 
> On 23.12.2012 00:08, Michael Jones wrote:
>> I noticed a few things, and did not copy the list because it might be Kinetis specific. See compilation problems towards the end.
>> 
>> I setup a program like this:
>> 
>>    int integer1, integer2, sum;
>> 
>>    printf("Hello Mike.\n");
>> 
>>    printf("Enter first integer:\n");
>>    scanf("%d", &integer1);
>>    return 0;
>> 
>> And when run, in the Eclipse gdb console (I finally realized there is more than one console):
>> 
>> 947,145 (gdb) 
>> 947,415 *running,thread-id="all"
>> 947,457 @"Hello Mike.\n"
>> 947,460 @"Enter first integer:\n"
>> 
>> Suggests it got some printf data, but it did not appear on the app console.
>> 
>> Then on the app console, I type 45 and on the gdb console get:
>> 
>> 192,289 27-interpreter-exec console 45
>> 
>> I don't know if this means gdb sent 45 to RedBoot or not. I assume so. But the application did not respond. So tty problems are in both directions. I can't tell what is gdb and what is RedBoot.
>> 
>> I extend the program like this:
>> 
>>    int integer1, integer2, sum;
>> 
>>    printf("Hello Mike.\n");
>> 
>>    printf("Enter first integer:\n");
>>    scanf("%d", &integer1);
>>    printf("Enter second integer:\n");
>>    scanf("%d", &integer2);
>>    sum = integer1 + integer2;
>> 
>> And I run from command line gdb (not Eclipse) which does print the one line Hello Mike app. I get:
>> 
>> (gdb) cont
>> Continuing.
>> FLASH configuration checksum error or invalid key
>> ASSERT FAIL: <2>stream.cxx[603]virtual Cyg_ErrNo Cyg_StdioStream::write() Stream object is not a valid stream!
>> ASSERT FAIL: <2>stream.cxx          [ 603] virtual Cyg_ErrNo Cyg_StdioStream::write()                                                           Stream object is not a valid stream!
>> 
>> So things are not so well with the command line gdb either.
>> 
>> I then tried another experiment with a program like this:
>> 
>>    int integer1, integer2, sum;
>> 
>>    printf("Hello Mike.\n");
>> 
>>    printf("Enter first integer:\n");
>>    scanf("%d", &integer1);
>>    printf("Enter second integer:\n");
>>    scanf("%d", &integer2);
>>    sum = integer1 + integer2;
>>    printf("Sum is %d\n", sum);
>>    return 0;
>> 
>> And I get a compile error:
>> 
>> Description	Resource	Path	Location	Type
>> address 0x200106fc of hello_world section `.bss' is not within region `ram'	hello_world		 	C/C++ Problem
>> address 0x20010704 of hello_world section `.bss' is not within region `ram'	hello_world		 	C/C++ Problem
>> 
>> So something is also not right with the compilation either.
> 
> Compilation is probably OK, but linker complains because there is not
> enough memory.
> This makes me to suspect that previous errors are due to low memory,
> probably some stack overflow.
> 
> The linker will include only used functions so if you scanf() it will
> add couple of tens KB to the image. You can save some memory if you
> configure printf()/scanf() without floating point support
> 
>> 
>> Now, I backed off to just printf programs with multiple lines to see what can be done.
>> 
>> A 10 line printf compiles and runs.
>> A 10 count for loop with printf works.
>> 
>> So it does not appear that the number of lines in the program matters.
>> 
>> I change the sum program to only printf and it can add numbers and print (gdb command line, not Eclipse)
>> 
>> With some playing around, the scanf seems to cause the compiler error about regions.
>> 
>> So I think try:
>> 
>>   c = getchar();
>> 
>> And with the command line gdb it prints, then hangs, and typing a character does not let the program proceed. So this seems like even with the command line arm-eabi-gdb, console input may not be routed back through RedBoot to the application.
>> 
>> With the example redboot and application projects you sent, are you able to read from stdin?
>> 
>> Do you know how to get Eclipse to handle IO for gdb?
> 
> I have the same problem with Eclipse.
> But I usually activate the (real) serial device driver and I get I/O on
> serial port.
> 
> 
> -- 
> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
> 


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