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
---------------------------------------- > Date: Tue, 26 Jun 2012 10:26:01 +0200 > From: ili...@siva.com.mk > To: tzi...@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 > > > > > -- > Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos > and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss > -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
