Great. 10x.
What exactly do you need?
I'm using the TinyOS tree. No changes there...
On Tue, Jan 1, 2013 at 10:57 AM, Eric Decker <cire...@gmail.com> wrote:
>
>
> On Tue, Jan 1, 2013 at 12:51 AM, Avishay Meron <
> avishay.me...@mail.huji.ac.il> wrote:
>
>> Hi Eric.
>> Thank you very much for you quick response.
>> I guess I need to dig up. I'm using defaults...
>> Anyway, I assume the default configurations you refer to are not set to
>> about 20 times lower than max possible.
>>
>
> The key is to figure out exactly how the h/w is being programmed.
>
> If you send me a pointer to your tree I'd be happy to look.
>
>
>> 20 is the factor of improvement I'm looking for (at least!).
>> I hope I'm not chasing pavements here...
>>
>
> Not sure how one goes about chasing pavements :-)
>
>
>>
>> On Tue, Jan 1, 2013 at 5:32 AM, Eric Decker <cire...@gmail.com> wrote:
>>
>>>
>>> How fast are you clocking the 1611 cpu?
>>>
>>> How fast are you clocking the SPI feeding the SD card?
>>>
>>> That will tell you the max theoretical rate you can transfer data.
>>>
>>> The high data rates to the SD assume the parallel 4 bit wide SD protocol
>>> rather than the SPI single bit stream that is probably used on the Shimmer
>>> or on my cards.
>>>
>>>
>>> On Mon, Dec 31, 2012 at 2:55 PM, Avishay Meron <
>>> avishay.me...@mail.huji.ac.il> wrote:
>>>
>>>> Hi all.
>>>> Searching google and the mailing list, I haven't found an explicit
>>>> answer to my problem. Here goes:
>>>> I'm trying to test SD logging max write speed on a shimmer2r. I've
>>>> tried using the FatFS but got unsatisfying results.
>>>> So, I decided to write directly to the SD. Using a simple application
>>>> (see code below), I found that the max rate of SD writing is about 20kB/s.
>>>> Is that it? is this the maximum rate possible? I was hoping to get at least
>>>> 0.5 or 1 MB/s. Any suggestions?
>>>>
>>>> Happy new year to you all...
>>>>
>>>> Here is my test code...
>>>>
>>>> -----------------TestSDP.nc-------------------
>>>> #include "TestSD.h"
>>>>
>>>> module TestSDP{
>>>> uses{
>>>> interface Leds;
>>>> interface Boot;
>>>> interface SD;
>>>> interface StdControl as SDStdControl;
>>>> }
>>>> }
>>>>
>>>> implementation{
>>>>
>>>> uint8_t resetData[SECTOR_SIZE], dummyData[SECTOR_SIZE];
>>>> int8_t data=0xff;
>>>> uint32_t beginSector=1000000, numOfIt=20000, currSector;
>>>>
>>>> //Using numOfIt=20000, it took the application 17 min and 47 sec to
>>>> run,
>>>> //from which 8 min and 51 sec to write dummyData.
>>>> //The rest of the time the application Formated the sectors.
>>>> //This means writing at about 20kB/s
>>>>
>>>> event void Boot.booted(){
>>>> call Leds.led2Toggle();
>>>> call SDStdControl.start();
>>>> memset(resetData, 0, SECTOR_SIZE);
>>>> memset(dummyData, data, SECTOR_SIZE);
>>>> call Leds.led2Toggle();
>>>> }
>>>>
>>>> void FormatSectors()
>>>> {
>>>> uint32_t i=0;
>>>> currSector=beginSector;
>>>> for (i=0; i<numOfIt; i++, currSector++)
>>>> {
>>>> call SD.writeBlock(currSector, resetData);
>>>> }
>>>> }
>>>>
>>>> void WriteDummyData()
>>>> {
>>>> uint32_t i=0;
>>>> currSector=beginSector;
>>>> for (i=0; i<numOfIt; i++, currSector++)
>>>> {
>>>> call SD.writeBlock(currSector, dummyData);
>>>> }
>>>> }
>>>>
>>>> async event void SD.available(){
>>>> call Leds.led0Toggle();
>>>> FormatSectors();
>>>> call Leds.led0Toggle();
>>>> call Leds.led1Toggle();
>>>> WriteDummyData();
>>>> call Leds.led1Toggle();
>>>> call Leds.led2Toggle();
>>>> }
>>>>
>>>> async event void SD.unavailable(){
>>>> }
>>>> }
>>>>
>>>> -----------------TestSDC.nc-------------------
>>>>
>>>> configuration TestSDC{
>>>> }
>>>> implementation{
>>>> components MainC, LedsC, SDC, TestSDP as app;
>>>> app.Boot -> MainC.Boot;
>>>> app.Leds -> LedsC;
>>>> app.SD -> SDC;
>>>> app.SDStdControl -> SDC;
>>>> }
>>>>
>>>> -----------------TestSD.h-------------------
>>>> #ifndef TEST_SD_H
>>>> #define TEST_SD_H
>>>> #define SECTOR_SIZE 512
>>>> #endif /* TEST_SD_H */
>>>>
>>>>
>>>> Best
>>>> Avishay
>>>>
>>>> _______________________________________________
>>>> Tinyos-help mailing list
>>>> Tinyos-help@millennium.berkeley.edu
>>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>>>>
>>>
>>>
>>>
>>> --
>>> Eric B. Decker
>>> Senior (over 50 :-) Researcher
>>>
>>>
>>
>>
>> --
>> Best
>> Avishay
>>
>
>
>
> --
> Eric B. Decker
> Senior (over 50 :-) Researcher
>
>
--
Best
Avishay
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