BS2pe and Parallax USB DataLogger question

Michael @ Afineol

When I run the attached code with "Sets = 1" everything executes without error, but when I set "Sets = 2" the BS2pe stops logging data on the 26th Serout·of the second set. It appears to stop·in the "Set_USB_1" subroutine to the DataLogger with the USB Flash Drive and DataLogger consitently blinking every .5 secs or so.

···· SEROUT TX\CTS, Baud, [noparse][[/noparse]$08, $20, $00, $00, $00, $0B, CR,
············ DEC1 Target, ",", DEC1 Hit, ",", DEC5 Speed, CR, LF, CR]

I have attached a file "datafile.txt" of what the output should look like and a comment where it stops.

I need help. Thanx in advance.

Mike S.

Unsoundcode

Hi Mike, I'm not sure whats going on here but looking at your datafile your program seems to be working fine. It·might be·possible that the logger buffer fills at Set=2 26th byte and that the 27th byte is written before the buffer is cleared. A line that·could prove or disprove that thought is to modify the Set_USB_1: sub routine. Replace PAUSE Serial_Write with SERIN RX\RTS, Baud,[noparse][[/noparse]WAIT (">")].

Jeff T.

EDIT: another possible cause for data not being written or the logger hanging is if the memstick is not formatted correctly.

Post Edited (Unsoundcode) : 12/3/2007 2:39:29 AM GMT

Michael @ Afineol

Jeff,

Thank you. I tried SERIN RX\RTS, Baud,[noparse][[/noparse]WAIT (">")], but it did not help. To·see if·my code was the issue,··I modified the DataloggerDemov1.0.bs2 code (I attached the modified program).

'

---

[noparse][[/noparse] Constants ]

---

NumSamples····· CON···· 200············· ' Number Of Samples To Log

· FOR counter = 1 TO NumSamples········ ' Number Of Samples To Log
·'·· HIGH Sensor························ ' Charge Capacitor
·'·· PAUSE 1···························· ' Wait 1 ms
·'·· RCTIME Sensor, 1, result··········· ' Measure Discharge Time
··· DEBUG "Sample ", DEC5 counter, " of ", DEC5 NumSamples,
········· " --> ", DEC5 result, CR····· ' Display Results
··· SEROUT TX\CTS, Baud, [noparse][[/noparse]$08, $20, $00, $00, $00, $0D, CR,
········· DEC5 counter, ",", DEC5 result, CR, LF, CR]
··· PAUSE 500·························· ' Write Results/Delay
··· GOSUB Get_Data····················· ' Purge Receive Buffer
· NEXT

This will loop 91 times and then give the same blinking on/off until I turn off the BS2pe.

Michael @ Afineol

Jeff,

I tried two other Flash Drives on·both my program and the DataLogger Demo program and they worked without error. I formated the Flash Drive that was not working and it still·stopped after 91 loops. I ran a Chkdsk /f on the·drive with the same result. The "failed" drive is a Kingston·DataTraveler 2 GB DTI/2GB.

Thanks for the advice: EDIT: another possible cause for data not being written or the logger hanging is if the memstick is not formatted correctly.

Is there a list of compatible Flash Drives with the Parallax DataLogger?

<!-- Edit -->

Unsoundcode

Hi Mike, not sure what operating system you have or how you have formatted the Kingston drive.

This is how I would format the drive for use with a logger in Win XP OS.

Control Panel-->AdministrativeTools-->Computer Management-->Disk Management-->Right Click the Memstick Drive letter-->Format-->Select Fat 32 with an Allocation unit size of 512-->OK

This has worked for me in the past, I would be interested to know if it helps with your Kingston drive.

Jeff T.