I'm using the msp430f5438 and IAR EW. The 5438 has 16k of RAM, but when I
use more than 6k, I get stuck on a function called __data20_memzero. The program
never gets to main. If I reduce memory consumption to below 6k approx,
everything works fine. My linker file correctly maps the 16k of RAM:
-Z(DATA)DATA16_I,DATA16_Z,DATA16_N,DATA16_HEAP+_DATA16_HEAP_SIZE00-5BFF
-Z(DATA)DATA20_I,DATA20_Z,DATA20_N,DATA20_HEAP+_DATA20_HEAP_SIZE
-Z(DATA)CSTACK+_STACK_SIZE#
I would really like to use more than 6k on this chip. Any help would be
appreciated. Thank you.
F5438 memory issue
Started by ●March 31, 2010
Reply by ●March 31, 20102010-03-31
I meant __data16_memzero not __data20_memzero.
--- In m..., "richdinoso" wrote:
>
> I'm using the msp430f5438 and IAR EW. The 5438 has 16k of RAM, but when I use more than 6k, I get stuck on a function called __data20_memzero. The program never gets to main. If I reduce memory consumption to below 6k approx, everything works fine. My linker file correctly maps the 16k of RAM:
> -Z(DATA)DATA16_I,DATA16_Z,DATA16_N,DATA16_HEAP+_DATA16_HEAP_SIZE00-5BFF
> -Z(DATA)DATA20_I,DATA20_Z,DATA20_N,DATA20_HEAP+_DATA20_HEAP_SIZE
> -Z(DATA)CSTACK+_STACK_SIZE#
> I would really like to use more than 6k on this chip. Any help would be appreciated. Thank you.
>
--- In m..., "richdinoso" wrote:
>
> I'm using the msp430f5438 and IAR EW. The 5438 has 16k of RAM, but when I use more than 6k, I get stuck on a function called __data20_memzero. The program never gets to main. If I reduce memory consumption to below 6k approx, everything works fine. My linker file correctly maps the 16k of RAM:
> -Z(DATA)DATA16_I,DATA16_Z,DATA16_N,DATA16_HEAP+_DATA16_HEAP_SIZE00-5BFF
> -Z(DATA)DATA20_I,DATA20_Z,DATA20_N,DATA20_HEAP+_DATA20_HEAP_SIZE
> -Z(DATA)CSTACK+_STACK_SIZE#
> I would really like to use more than 6k on this chip. Any help would be appreciated. Thank you.
>
Reply by ●March 31, 20102010-03-31
Not sure what the problem is. But it sounds like the c-start-up code did not
disable the Watch-dog and caused a reset in the middle of zeroing your RAM.
--- In m..., "richdinoso" wrote:
>
> I'm using the msp430f5438 and IAR EW. The 5438 has 16k of RAM, but when I use more than 6k, I get stuck on a function called __data20_memzero. The program never gets to main. If I reduce memory consumption to below 6k approx, everything works fine. My linker file correctly maps the 16k of RAM:
> -Z(DATA)DATA16_I,DATA16_Z,DATA16_N,DATA16_HEAP+_DATA16_HEAP_SIZE00-5BFF
> -Z(DATA)DATA20_I,DATA20_Z,DATA20_N,DATA20_HEAP+_DATA20_HEAP_SIZE
> -Z(DATA)CSTACK+_STACK_SIZE#
> I would really like to use more than 6k on this chip. Any help would be appreciated. Thank you.
>
--- In m..., "richdinoso" wrote:
>
> I'm using the msp430f5438 and IAR EW. The 5438 has 16k of RAM, but when I use more than 6k, I get stuck on a function called __data20_memzero. The program never gets to main. If I reduce memory consumption to below 6k approx, everything works fine. My linker file correctly maps the 16k of RAM:
> -Z(DATA)DATA16_I,DATA16_Z,DATA16_N,DATA16_HEAP+_DATA16_HEAP_SIZE00-5BFF
> -Z(DATA)DATA20_I,DATA20_Z,DATA20_N,DATA20_HEAP+_DATA20_HEAP_SIZE
> -Z(DATA)CSTACK+_STACK_SIZE#
> I would really like to use more than 6k on this chip. Any help would be appreciated. Thank you.
>
Reply by ●April 1, 20102010-04-01
On 2010-04-01 00:42, old_cow_yellow wrote:
> Not sure what the problem is. But it sounds like the c-start-up code did
> not disable the Watch-dog and caused a reset in the middle of zeroing
> your RAM.
That sounds about right, the IAR cstartup does not disable the watchdog.
We follow the TI recommendation that this should be done in the
__low_level_init routine that the application provides.
Alternatively, you can modify cstartup and add it to your application,
there are instructions in it on how to disable the watchdog.
-- Anders Lindgren, IAR Systems
--
Disclaimer: Opinions expressed in this posting are strictly my own and
not necessarily those of my employer.
> Not sure what the problem is. But it sounds like the c-start-up code did
> not disable the Watch-dog and caused a reset in the middle of zeroing
> your RAM.
That sounds about right, the IAR cstartup does not disable the watchdog.
We follow the TI recommendation that this should be done in the
__low_level_init routine that the application provides.
Alternatively, you can modify cstartup and add it to your application,
there are instructions in it on how to disable the watchdog.
-- Anders Lindgren, IAR Systems
--
Disclaimer: Opinions expressed in this posting are strictly my own and
not necessarily those of my employer.
Reply by ●April 2, 20102010-04-02
still the same... watchdog is probably timing out... you need to disable it
before main..
either by a custom cstartup or by the __low_level_ function..
--- On Wed, 3/31/10, richdinoso wrote:
From: richdinoso
Subject: [msp430] Re: F5438 memory issue
To: m...
Date: Wednesday, March 31, 2010, 6:30 PM
I meant __data16_memzero not __data20_memzero.
--- In msp430@yahoogroups. com, "richdinoso" wrote:
>
> I'm using the msp430f5438 and IAR EW. The 5438 has 16k of RAM, but when I use more than 6k, I get stuck on a function called __data20_memzero. The program never gets to main. If I reduce memory consumption to below 6k approx, everything works fine. My linker file correctly maps the 16k of RAM:
> -Z(DATA)DATA16_ I,DATA16_ Z,DATA16_ N,DATA16_ HEAP+_DATA16_ HEAP_SIZE= 1C00-5BFF
> -Z(DATA)DATA20_ I,DATA20_ Z,DATA20_ N,DATA20_ HEAP+_DATA20_ HEAP_SIZE
> -Z(DATA)CSTACK+ _STACK_SIZE#
>
>
> I would really like to use more than 6k on this chip. Any help would be appreciated. Thank you.
>
either by a custom cstartup or by the __low_level_ function..
--- On Wed, 3/31/10, richdinoso wrote:
From: richdinoso
Subject: [msp430] Re: F5438 memory issue
To: m...
Date: Wednesday, March 31, 2010, 6:30 PM
I meant __data16_memzero not __data20_memzero.
--- In msp430@yahoogroups. com, "richdinoso" wrote:
>
> I'm using the msp430f5438 and IAR EW. The 5438 has 16k of RAM, but when I use more than 6k, I get stuck on a function called __data20_memzero. The program never gets to main. If I reduce memory consumption to below 6k approx, everything works fine. My linker file correctly maps the 16k of RAM:
> -Z(DATA)DATA16_ I,DATA16_ Z,DATA16_ N,DATA16_ HEAP+_DATA16_ HEAP_SIZE= 1C00-5BFF
> -Z(DATA)DATA20_ I,DATA20_ Z,DATA20_ N,DATA20_ HEAP+_DATA20_ HEAP_SIZE
> -Z(DATA)CSTACK+ _STACK_SIZE#
>
>
> I would really like to use more than 6k on this chip. Any help would be appreciated. Thank you.
>
