My aim is to use the uLCD-32032-P1T as a datalogger, with the I2C function on the picaso MCU controlling a bunch of external sensors.  I was planning on storing the data into a local text file saved onto the uSD card. So far all the documenation suggests this is achievable.

However, Part the functionality of the logger will include docking the LCD into a USB cradle and automatically downloading the data to a PC.  This may require that the uSD card be available as a winbdows FAT drive, without being removed from the LCD.  Is this possible?

The alternative is to write into 4DGL a communications protocol, and do the necessary read from the uSD manually, and then transmit, byte by byte to the PC via the USB-CE5 interface.  It would be an easier task (for the windows software) if I were able to map the uSD as a drive.

Anybody's thoughts on this would be appreciated.

Thanks

Andy

Understood...

Serial communications protocol won't be all bad, just extra work I was hoping to avoid.  It really is just on request of particular filename, read file byte, send file byte, until EOF.  etc..  In the short term for prototype, I can just make  the uSD removable and plug it into a reader 

Thanks

Andy

Hi there, a standard USB to serial converter won't work (I don't think) because you need to have a reset pulse sent to the screen.  

See : This COnnection PDF for information.

Basically they take the DTR line and rig it up the pass through a pulse. The CE5 USB module does this also, except there is no RS232 chip since the DTR is a signal available out of the FTDI IC...  Don't want to confuse you but I would recomment buying a USB-CE5 for $30something  or building yourself the MAX232 circuit shown in the PDF (simple) goodluck.

Andy

We are currently working on a "PICASO-GFX-4DGL-Internal-Functions" document, similar to the "GOLDELOX-GFX2-4DGL-Internal-Functions" document. In the mean time you can find the available 4DGL functions for the uSD card here.