Casio fx-9860G SD- How to read files in the sd card?

[AmazoNKA Profile]

Thanks Simon. I'm very happy you ordered the same device - in fact i'm very excited about you considering using it whichever way possible.

By the way in your documentation in history there is the following

Code: Select all

Version 14:
Communication Protocol: AHelper (omnimaga) successfully accessed the Protocol 7.00 with the fx-CG from USB.

but at first glance that chapter has no USB routines if I'm not mistaken - so I'm wondering if it was some mix up or if not if extending prizm's memory via some USB card reader etc will also be possible and perhaps offer speed advantage vs serial port...

[SimonLothar]

USB-transfer would be about 4 times faster than 115 kBaud serial transfer.
According to the SH7724-manual, the USB-module can act as host. But the Prizm acts as USB-device.
As far as I am concerned, writing a USB-host-software for the Prizm would be too much an effort, if possible at all. I wouldn't be able to do that.
I even doubt that the necessary hardware-lines are reachable from outside.

I'd prefer to see, what we can achieve with this sparkfun openlog serial thing.

[AmazoNKA Profile]

Thank you very much for this.

Regarding main memory - is the maximum capacity of it 512kb please - not that it is advisable to use it all, just for my understanding. Also is this the maximum single file size please? Thanks again

[SimonLothar]

Regarding main memory - is the maximum capacity of it 512kb please - not that it is advisable to use it all, just for my understanding. Also is this the maximum single file size please?

The maximum capacity of the main memory is slightly below 64 kB. I think, the max. filesize in the storage memory is limited by the available space, which is about 15 MB max..
The Prizm's filesystem resembles FAT16.

[SimonLothar]

I'm very happy you ordered the same device - in fact i'm very excited about you considering using it whichever way possible.

It arrived yesterday. Did a bit of soldering, connected it to a fx-9860GII SD (as well as to a fx-9750GII-2) and it seems to work as expected.

[AmazoNKA Profile]

Great news, very happy for you. Strange that mine has not arrived still. Did you order directly from sparkfun please?

[SimonLothar]

...Did you order directly from sparkfun please?

No. I ordered from a local retailer. Just about 30 km from where I live.

[AmazoNKA Profile]

Thanks, I should have done the same - on the other hand I had extra time to start developing a small Prizm add-in for Pokemon Go... I will upload a taster on cemetech soon if anyone wishes to try,

[SimonLothar]

Most functions work as expected (more or less).

sample interface: Show

class TSparkFunOpenLog {
public:
// constructor
TSparkFunOpenLog( void ){
FAppending = FWriting = 0;
}
// destructor
virtual ~TSparkFunOpenLog();

int Open( void );
int WaitReplay( void );
int Close( void );
int Query( void ); // ?
int List( void ); // ls
int Disk( void ); // disk
int Init( void ); // init
int Sync( void ); // sync
int Reset( void ); // reset
int NewFile( char*filename_8_3 ); // new file
int AppendFile( char*filename_8_3 ); // append file
int CloseAppendFile( void ); // send escape
int CommandMode( void );
int SendData( void*buffer, int len );
int Write( char*string );
int WriteLn( char*string );
int Baud( char*string ); // baud
int WriteFile( char*filename_8_3, char*offset );
int WriteFileLn( char*string );
int CloseWriteFile( void ); // WriteFileLn( "" )
int CatFile( char*filename_8_3 ); // read file ... HEX (cat is not supported any more since version 2.0)
int SizeFile( char*filename_8_3 ); // size file
int RemoveFile( char*filename_8_3 ); // rm file

protected:

private:
int FAppending, FWriting;

int FSendCommand( char*_command );
int FSendData( void*buffer, int len );
};

A little drawback: It doesn't seem to be possible to process binary files.
The system seems to be designed to process text-files.
Of course it is possible to convert any binary file to a text-file and vice versa. But this doubles the size.

[AmazoNKA Profile]

That's so strange they dropped hex support, maybe their bootloader can be downgraded to support binary files directly?