On reading Table 1-2, I found SRAM value for micaz to be 4kB.
I wrote a code wherein I declare two arrays of 30000 bytes each, and then
assign values to the elements to these two arrays.
The compilation looks like this:
compiled TestAppC to build/micaz/main.exe
21418 bytes in ROM
61722 bytes in RAM
avr-objcopy --output-target=srec build/micaz/main.exe build/micaz/main.srec
avr-objcopy --output-target=ihex build/micaz/main.exe build/micaz/main.ihex
writing TOS image
Now if SRAM is 4kB, then for my array variables how am I getting 61722 bytes
in RAM?
beyond this say at 63000 bytes it gives error: .bss is not within region
data
Thanks
Vikram
On Fri, Nov 13, 2009 at 12:10 PM, Paul Johnson <[email protected]> wrote:
> Vikram,
>
> Look at "Table 1-2. Mote Product Summary" in the link I provided. It
> provides the exact information that you are asking about.
>
> As for your other question, Program Flash Memory is reserved explicitly for
> your executable(so no, program size does directly affect available data
> size). RAM (SRAM in this case) is used to store any program variables that
> you might use, and any variables tinyos uses internally, stack variables,
> etc. Measurement(Serial) Flash is used to store whatever you want,
> measurement readings, logs, etc. EEPROM is used to store configuration data
> that you burn onto the device. This might be node ID's, private/public keys
> for encryption, etc.
>
> -Paul
>
>
> Vikram vik76 wrote:
>
> On examining the micaz datasheet I found
> Program Flash Memory - 128K bytes
> Measurement (Serial) Flash - 512K bytes
> Configuration EEPROM - 4K bytes
> I am not very clear about the purpose of all of the above.
>
> I would like to know where the program executable code resides, and where
> the data resides. From data I mean how many bytes of values can the
> variables in my program store.
> Does the program and data share the same memory? If yes, does this mean
> that if my program size increases, then the available data size decreases.
> My requirement is to use an array of uint8_t for a large number of elements
> whose values keep changing dynamically.
>
> Thanks
>
> Vikram
>
>
> On Fri, Nov 13, 2009 at 11:42 AM, Paul Johnson <[email protected]> wrote:
>
>> Vikram,
>>
>> Please examine the crossbow datasheet for the micaz or the crossbow's
>> MPR-MIB User's Manual for this information.
>>
>>
>> http://www.xbow.com/support/support_pdf_files/mpr-mib_series_users_manual.pdf
>>
>> -Paul
>>
>>
>> Vikram vik76 wrote:
>>
>> Hello,
>>
>> I would like to know how much memory is available in micaz motes for the
>> following.
>> 1. Data
>> 2. Program
>>
>> Thanks
>>
>> Vikram
>>
>> ------------------------------
>>
>> _______________________________________________
>> Tinyos-help mailing
>> [email protected]https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>>
>>
>>
>
>
_______________________________________________
Tinyos-help mailing list
[email protected]
https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
