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RE: kinetis kwikstik's ecos trouble
Thanks,
but why my redboot work successfully,from the same UART and the same setting,
and I want to confirm?If the example(hello.c,serial.c)use the kwikstik's UART5 for output,and the setting is 38400 8N1
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> Date: Tue, 26 Jun 2012 10:26:01 +0200
> From: ilijak@siva.com.mk
> To: tziang@hotmail.com
> CC: ecos-discuss@ecos.sourceware.org
> Subject: Re: [ECOS] kinetis kwikstik's ecos trouble
>
> Hi
>
> It may be a hardware issue, depends on how do you power Kwikstik and
> what do you use for RS232 signals?
>
> I would assume that you use TWR-SER or compatible 3.3V MAX chip.
> Then if you power the Kwikstik through it's own USB the Vdd voltage will
> be 2.8V due to drop on serial Schottky diode (see Kwikstik schematic).
> It seems the output level is too low for 3.3 MAX chip and you won't see
> output although the chip is working.
>
> If you power through Tower elevator then Vdd is 3.3V and you'll see output.
>
> I hope this helps.
>
> Ilija
>
> On 26.06.2012 08:39, tangwei wrote:
> > Dear all,
> > redboot have run on my kwikstik ok, but I am not sure whether the ecos is OK, my steps is below:
> > use the CVS version which contains freescale's kwikstik template,
> > 1. use the default setting for kwikstik to get the "libtarget.a" and etc;2. build the examples from the ecos/examples/ ,such as hello.c ,twothreads.c ,simple-alarm.c
> > use the command below
> > /opt/ecos/gnutools/arm-eabi/bin/arm-eabi-gcc -g -D_ECOS -I ../../test/default_install/include/ simple-alarm.c -L ../../test/default_install/lib -Ttarget.ld -nostdlib
> > and get the a.out file3. transfer a.out into .bin ,use command below
> > /opt/ecos/gnutools/arm-eabi/bin/arm-eabi-objcopy -O binary a.out simple-alarm.bin
> > finally I get hello.bin,twothreads.bin, and simple-alarm.bin
> >
> > 4.Then I use j-Link to download any of the three bin file , the UART have nothing output, by the way, the UART's software and hardware's setting are the same-38400 8N1,UART5, and the redboot works OK.Does the UART setting is OK, and can someone tell me where is the bug?
> > Thanks
> > ----------tangwei
> >
>
>
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