RE: [ECOS] e7t ROM startup

["Robert Cragie" <rcc at jennic dot com>]

I have not used the Evaluator E7T, but have used the Integrator. I have had
a quick look through the Evaluator E7T User Guide and come up with some
suggestions - I hope they are right.

> here i am trying to add the module header to a sample application and put
> that in the flash and run it from there. as suggested earlier i
> am trying to
> follow the same procedure which is used to build the redboot. i am able to
> build the image (uuencoded) and put that to the flash. after 'flashwrite',
> when i say rommodules, it is not displaying the application
> (supposed to be a
> module) which i have put in the flash. the part of the make file
> which i have
> used to build the standalone application is there at the end of
> the mail. i
> am also providing the counter_module.c where i have defined the module
> header.

I think you should be using 'flashload' (p 4-17 of Evaluator E7T User
Guide), not 'flashwrite'. As far as I can tell, 'flashwrite' is a 'raw'
write to the flash, i.e. copies RAM to flash, without putting any module
header on.

>
> am i missing anything else? can somebody help in resolving this problem? i
> will not be able to move further as this is very critical for my project.

According to p 4-29 of Evaluator E7T User Guide, I don't think you need to
include a module header in your code; this will be added by the bootstrap
loader. This may well confuse the module management software.

> note: counter.c is my sample application and counter_module.c is the file
> which contains the module header.
>
> counter: $(wildcard
> $(REPOSITORY)/arm-ecos-standalone/counter/counter_module.c
> $(PREFIX)/lib/target.ld $(PREFIX)/lib/vectors.o $(PREFIX)/lib/libtarget.a
> $(PREFIX)/lib/libextras.a)
>         # First build version with no checksum.
>         @echo "First build version with no checksum."
>         $(XCC) -c -I$(INCLUDE_PATH) counter.c
>         $(XCC) -c -I$(INCLUDE_PATH) -Wp,-MD,deps.tmp -I$(dir $<)
> $(CFLAGS) -o
> counter_ncs.o $<
>         $(XCC) $(LDFLAGS) -L$(PREFIX)/lib -Ttarget.ld -o counter_ncs.tmp
> counter_ncs.o counter.o
>         $(OBJCOPY) --strip-debug counter_ncs.tmp counter_ncs.img
>         $(OBJCOPY) -O binary counter_ncs.img counter_ncs.bin
>         # Then build version with checksum from previously built image.
>         $(XCC) -c -DCHECKSUM=`$(dir $<)flash_cksum.tcl counter_ncs.bin`
> -I$(INCLUDE_PATH) -Wp,-MD,deps.tmp -I$(dir $<) $(CFLAGS) -o
> counter_cs.o $<
>         $(XCC) $(LDFLAGS) -L$(PREFIX)/lib -Ttarget.ld -o counter_cs.tmp
> counter_cs.o counter.o
>         $(OBJCOPY) --strip-debug counter_cs.tmp counter.img
>         $(OBJCOPY) -O binary counter.img counter.bin
>         uuencode counter.bin counter.bin.tmp | tr '`' ' ' > counter.UU
>
> --------------------------------------------------------
> counter_module.c
> --------------------------------------------------------
>
> /* This is the module 'wrapper' for a simple application */
>
> /* #include
> </u/ARM/new_ecos/packages/arm-ecos-standalone/install/include/pkgc
> onf/hal.h>
> */
> #include <pkgconf/hal.h>
> #include <cyg/infra/cyg_type.h>
> #include <cyg/hal/hal_stub.h>

********* You don't need this - remove it (begin)
>
> /* ARM e7t module stuff */
>
> #ifndef CHECKSUM
>     #define CHECKSUM  0x0
> #endif
>
> extern char __exception_handlers, __rom_data_end;
>
> const char __title[] = "Counter";
> const char __help[] = "Counter              " __DATE__;
>
> struct ModuleHeader {
>     cyg_uint32    magic;
>     cyg_uint16    flags;
>     cyg_uint8     major;
>     cyg_uint8     minor;
>     cyg_uint32    checksum;
>     cyg_uint32    ro_base;
>     cyg_uint32    ro_limit;
>     cyg_uint32    rw_base;
>     cyg_uint32    zi_base;
>     cyg_uint32    zi_limit;
>     cyg_uint32    self;
>     cyg_uint32    start;
>     cyg_uint32    init;
>     cyg_uint32    final;
>     cyg_uint32    service;
>     cyg_uint32    title;
>     cyg_uint32    help;
>     cyg_uint32    cmdtbl;
>     cyg_uint32    swi_base;
>     cyg_uint32    swi_handler;
> };
>
> const static struct ModuleHeader __hdr =
> {
>     0x4D484944,             /* identifies the module header */
>     2,                      /* flag = auto start */
>     1,                      /* major version */
>     0,                      /* minor version */
>     CHECKSUM,               /* checksum */
>     (cyg_uint32) &__exception_handlers, /* start of
>                                         module (read-only) image */
>     (cyg_uint32) &__rom_data_end,       /* end of image */
>     0,                      /* r/w base - unused */
>     0,                      /* bss base - unused */
>     0,                      /* bss limit - unused */
>     (cyg_uint32) &__hdr,    /* self (for module identification) */
>     (cyg_uint32) &__exception_handlers, /* startup */
>     0,                      /* init */
>     0,                      /* final */
>     0,                      /* service */
>     (cyg_uint32) &__title,  /* title */
>     (cyg_uint32) &__help,   /* help string */
>     0,                      /* command table - unused */
>     0,                      /* SWI table - unsused */
>     0,                      /* SWI handler - unused */
> };

********* You don't need this - remove it (end)

>
> static void
> __dummy(void *p)
> {
> }
>
> void __dummy_init(void)
> {
>     __dummy((void*)&__hdr);
> }
>
> _Counter_init(__dummy_init, RedBoot_INIT_LAST);
>
>
> regards,
> ravi kumar.
>
>