nobody wrote on Tuesday, August 22, 2006:
I used the port for AT91SAM7 GCC. I have problem to write correct makefile because the compiler returns errors when I want to compile tasks.c in THUMB mode!
In ARM mode it is working (after 0x1f to 0x3f CPSR changing in firsttask constant (i can’t remember the name now, sorry)) but prvIdleTask does not start!!! Therefore I have to create my own idle task now…
any ideas?
Janusz
nobody wrote on Tuesday, August 22, 2006:
Important: it is not compiler error, linker only… I guess it is a special option needed.
Janusz
nobody wrote on Wednesday, August 23, 2006:
sorry, my mistake in post before - it is compiler error, not linker…, please look:
Compiling C: Source/tasks.c
arm-elf-gcc -c -mthumb -mcpu=arm7tdmi -mthumb-interwork -I. -gdwarf-2 -DROM_RUN
-DVECTORS_IN_RAM -DSAM7_GCC -Os -Wall -Wcast-align -Wimplicit -Wpointer-arith
-Wswitch -Wredundant-decls -Wreturn-type -Wshadow -Wunused -Wa,-adhlns=Source/ta
sks.lst -I./Source/include -I./lwip-1.1.0/src/include -I./lwip-1.1.0/contrib/po
rt/FreeRTOS/AT91SAM7X -I./lwip-1.1.0/src/include/ipv4 -I./lwip-1.1.0/src/netif/p
pp -I. -I./lwip-1.1.0/src/include -I./lwip-1.1.0/contrib/port/FreeRTOS/AT91SAM7X
-I./Source/include -I./Source/portable/GCC/ARM7_AT91SAM7S -I./lwip-1.1.0/src/in
clude/ipv4 -I./lwip-1.1.0/src/netif/ppp -I./EMAC -MD -MP -MF .dep/tasks.o.d -Wn
ested-externs -w -std=gnu99 Source/tasks.c -o Source/tasks.o
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s: Assembler messages:
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:1717: Error: selected processor does
not support `stmdb SP!,{R0}’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:1718: Error: selected processor does
not support `mrs R0,CPSR’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:1719: Error: unshifted register requ
ired – `orr R0,R0,#0xC0’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:1720: Error: selected processor does
not support `msr CPSR,R0’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:1721: Error: lo register required –
`ldmia SP!,{R0}’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:2172: Error: selected processor does
not support `stmdb SP!,{R0}’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:2173: Error: selected processor does
not support `mrs R0,CPSR’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:2174: Error: unshifted register requ
ired – `orr R0,R0,#0xC0’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:2175: Error: selected processor does
not support `msr CPSR,R0’
C:\DOCUME~1\Janusz\USTAWI~1\Temp/cc2Naaaa.s:2176: Error: lo register required –
`ldmia SP!,{R0}’
make: *** [Source/tasks.o] Error 1
nobody wrote on Wednesday, August 23, 2006:
I have found solution 
Makefile was not incoporate THUMB_INTERWORK flag:
CDEFS += -DSAM7_GCC
CDEFS += -DTHUMB_INTERWORK
i’m closing the thread.
Janusz