gps logger .... which type of memeory should be used..

[dani]

Hi all,

I am here with a project which needs to be log gps sentence GPRMC or GPGGA every two second(gps update rate). GPS giving rs232 output and i want to make a PIC microcontroller based simple gps logger which can record these sentences in the form of raw bytes for one day. It is basically to check the Van movment whole the day.

Now i need advise that what type of memory should be used to store these raw bytes . I have tried to use I2C memories 24c256 etc. But some time it doesnt write or read the right data to and from it. May be some circuit mistake as my electroincs side is not of much higher standard.

Is there other high speed large datastorage eeprom which can easily be intface with PIC microcontrollers. then pleasee tell

regards

 

[IanP]

This is quite "slow" application - saving some bytes every second - so any serial EEprom, 2-wire(I2C) 24Cxxx or 3-wire 93Cxx, should perform well ..
If you have problem with an I2C EEprom try to identify and eliminate the reason(s) rather than to look for different type of memory ..

Regrads,
IanP

 

[bobcat1]

Hi

I have done a similar project using M25P64 flash memory form st to log gps & sytem data

All the best


Bobi

 

[Bingo600]

Have a look at Atmel Dataflash

They come in rather big sizes , and a software SPI is easy to make.

/Bingo

 

[SynKore Support]

Yes, dani, why not try to solve the I2C problem? Check the pull-up resistors, I2C timing, START/STOP conditions, etc...

Michael Zhang

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