> On Wednesday 09 June 2010 09:48:53 Jesper K. Pedersen
wrote:
> Have a look at the Lejos project. This runs a small Java virtual machine
> on
> the SAM7 inside the Lego Mindstorms.
>
> This device runs lots of different interrupts and uses priorities, nested
> interrupts, etc... pretty much all the stuff you need to learn.
>
> http://lejos.svn.sourceforge.net/viewvc/lejos/trunk/nxtvm/platform/nxt/
Unfortunately this is one of the many projects that I briefly looked at
but never got to compile - due to a problem in their Makefile.
When running "make" this is the output I get :
Building:
C objects: aic.o systick.o udp.o twi.o nxt_spi.o nxt_motors.o data_abort.o
display.o i2c.o sound.o bt.o hs.o printf.o main.o nxt_avr.o sensors.o
nxt_lcd.o native.o platform_hooks.o flashprog.oram jvm_interpreter.o
jvm_threads.o jvm_exceptions.o jvm_memory.o jvm_language.o jvm_poll.o
jvm_debug.o
Assembler objects: interrupts.o vectors.o init.o irq.o
LD source: sam7.lds
CC arm-elf-gcc
LD /usr/local/arm/arm-elf/bin/ld
OBJCOPY /usr/local/arm/arm-elf/bin/objcopy
OBJDUMP /usr/local/arm/arm-elf/bin/objdump
LIBGCC /usr/local/arm/lib/gcc/arm-elf/4.4.2/thumb/interwork/libgcc.a
LIBC /usr/local/arm/arm-elf/lib/thumb/interwork/libc.a
LIBM /usr/local/arm/arm-elf/lib/thumb/interwork/libm.a
make: *** No rule to make target `lejos_nxt_rom.bin', needed by `all'.
Stop.
I really wonder if I should stop at the "Hello World!" repeated 50 times
and start playing tic-tac-toe and forget about microcontrollers (seems
that I have gotten too old for learning ;)
>> I am very much interested in an example software
showing the workings of
>> even just a "simple" (massive understatement) interrupt.
>>
>> As I can only access my board via the Samba it must be either running
>> from ram or able to be programmed in flash via Samba (I do not have any
>> jtag connection available).
>>
>> My system consist of :
>>
>> Developement server running :
>>
>> Debian 5.0
>> arm-elf-gcc (GCC) 4.4.2 + tools (ie. ld and so on)
>> newlib-1.18
>> Sam_I_Am v0.5
>> Microcontroller host :
>>
>> Olimex dev. board - SAM7P256 (hosted with AT91SAM7S256)
>> Any hints/suggestions are greatly appreciated as any "down to earth"
>> documentation seems hard to find.
>>
>> Best regards
>> JesperKP
>> Just another confused hobbyist trying to learn the SAM7 concept
>