Unable to build Bitthunder

[morger]

Unfortunately I was not successful with building bitthunder for Raspberry Pi. I got this Message:

/home/christoph/bitthunder/bsp/arm/raspberrypi/build/os/src/bt_main.o: In function `bt_main':
/home/christoph/bitthunder/bsp/arm/raspberrypi/../../../os/src/bt_main.c:125: undefined reference to `BT_Flush'
/home/christoph/bitthunder/bsp/arm/raspberrypi/build/os/src/lib/putc.o: In function `fputc':
/home/christoph/bitthunder/bsp/arm/raspberrypi/../../../os/src/lib/putc.c:53: undefined reference to `BT_Write'
/home/christoph/bitthunder/bsp/arm/raspberrypi/../../../os/src/lib/putc.c:55: undefined reference to `BT_Write'
collect2: error: ld returned 1 exit status
make[1]: *** [kernel.elf] Fehler 1
make: *** [all] Fehler 2

I think there might be a problem with the makefiles but due to my limmited knowledge in this issues I need some help at this point.

Thanks in advance!

[jameswalmsley]

Hi Morger,

Thanks for trying this out. I think the file-system support is not included by default. Enable the FullFAT filesystem on the menuconfig.

I haven't tested this on the pi in a long time, so its likely it doesn't boot at the moment. Currently there are very few drivers, I even didn't find time to write the uart driver yet.

I'll test on my pi with the latest version and let you know.

James

[morger]

Hi James,

Thanks for this advise. If I enable the FullFAT Filesystem I get this error message:

/home/christoph/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin/../lib/gcc/arm-none-    eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-sbrkr.o): In function `_sbrk_r':
sbrkr.c:(.text+0x18): undefined reference to `_sbrk'
collect2: error: ld returned 1 exit status
make[1]: *** [kernel.elf] Fehler 1
make: *** [all] Fehler 2

Unlikely I don't get any Error if I disable FullFAT again. But the buil kernel.img is not working either (I konfiguratet and activated the Alive! LED function).

And one more question: is ethernet working stable? For I would like to use Bitthunder for a network application.

Thanks in advance.

Morger

[jameswalmsley]

Hi Morger,

I last tested this working on the RaspberryPi a long time ago so need to test if it still works. There's been a lot of development on the kernel since then.

Ethernet works well, but currently there is no USB subsystem which you would need to write a mac driver for the RPi.

The _sbrk() is coming from the Sourcery Codebench compiler's libc implementation. It expects a function called _sbrk to allow its malloc() implementation to allocate memory. This is incompatible with BitThunder as we provide a direct malloc() api instead.

To build a toolchain with tighter integration see: https://github.com/bitthunder-toolchain/btdk

Otherwise you can make an _sbrk function that returns NULL, and hope nothing bad happens.

Thanks for spending time to try BitThunder.

James