Hi,
I am trying to use the Logomatic data-logger (v1.0). Everything is working well except that I cannot record more than 96ko on my SD card (1Go from Kingston). The 96ko can be stored in a single file or divided in several smaller files, but I am not able to store further data once this limitation is reached !! The LEDs are still blinking as if the data were being written to the card.
Does anyone has a guess about where this strange behavior might be coming from ?
Hi again,
nobody seems to have experienced the same problem so far or have any idea where it might be coming from.
So here is how I tried to used the logomatic:
either on the TTL output of the MPC555 micro-controller from Motorola
or with a standard serial output from a PC through the LPC Serial Port Boot Loader Interface (schematic here: http://www.sparkfun.com/datasheets/LPC/LPC-ICP.pdf.
I supplied Vin with a 5V DC regulated generator so that there is enough current to write to the SD card.
The BSL pin is left aside (By the way, what is it used for ?)
The RST, TXD, RXD, GND and 3.3V pins are linked to the ones of the LPC Bootloader. (So I guess this 3.3V pin is an output.)
The SD card used is a 1Go from Kingston, formatted in FAT16. The configuration file is the following:
MODE = 0
ASCII = N
Baud = 8
Frequency = 100
Trigger Character = $
Text Frame = 110
AD1.5 = N
AD1.4 = N
AD1.3 = N
AD0.3 = N
AD0.2 = N
AD0.1 = N
AD1.2 = N
AD0.4 = N
AD1.7 = N
AD1.6 = N
Safety On = Y
I tried various baudrates (6, 7, 8 ) and various delays between the different sets of data (from 50ms to 400ms).
The issue is that I cannot record more than 96ko on my SD card (1Go !). The 96ko can be stored in a single file or divided in several smaller files, but I am not able to store further data once this limitation is reached !! The LEDs are still blinking as if the data were being written to the card.
This starts to drive me crazy…
Anyone has a guess ? Please tell me if I can provide any more information useful, I may have left something important aside (otherwise it should be working, isn’t it ?)
Have you tried with another SDcard ?
Did you push the stop button before removing the card?
Angelo
Thanks for your answer.
I have tried with 2 Kingston SD cards of 1Go (same model). I have ordered a new one from another brand to test it. Do you have one specific model to recommend ?
I push on the stop button at the end, before removing the card. And to get several files in a raw, I push the reset button/send a reset pulse on the RST pin. I am able to save 2 or 3 small files in a raw if and only if the total amount of data finally stored on the card is under 96ko.