[avr-gcc-list] I am porting uC/OS-II into the Mega8515 but it doesn't seem to work.

[Eric Guo]

I am just new to uC/OS and AVR world, but I have already used gcc two months & 
read the uC/OS-II book  at least once.

Now I am porting uC/OS to mega8515, using Julius Luukko's mega128 porting 
at-avr-jlu-210703.tgz (already replace the file avr_isr.h).
http://ee.lut.fi/staff/Julius.Luukko/ucos-ii/index.html

I am using external memory mode (HTT62256SRAM 32K), So I change makefile
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
into
LDFLAGS = 
-Wl,-Map=$(TARGET).map,--cref,-Tdata=0x800260,--defsym=__heap_end=0x807fff.
to relocate .data and .bss section into the external memory.

I also add following lines to test.c
/*
**************************************************************************************************************
*                                   Preinit the external memory
**************************************************************************************************************
*/
void my_init_mem (void) __attribute__ ((naked)) \
    __attribute__ ((section (".init1")));

void my_init_mem (void)
{
        MCUCR=(1<<SRE);
        EMCUCR=(1<<SRL2);
}
to enable external memory at early stage.


I replace UART0 into UART several place in the test.c in order to seem the 
classic uC/OS-II output.

I have to replace Julius's os_cpu_a.asm "call" into "rcall" because mega8515 
only accept this. ("call" is a invalid opcode in Mega8515?)

After done this, the Mega8515 seems still doesn't work. I am using 
WinAVR-20030424 but have no ICE, so it is very different to debug this problem.

Who have already done this? Can you give me some advice?



best regards

Eric Guo