Adding EEprom to a PIC

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Mosaic

Well-Known Member
Can anyone point me to a decent tut for adding EEPROm to a pic?

I might need a couple MBs

thx
 
Well have'nt figure that out.

Basically I am sampling music notes played on an instrument....determining the note (eg A B C..) and then storing it with a timestamp in Eprom to be read back out via serial over usb later.

I may need a dspic I am not sure.

What do u think?
 
EEPROM does have a 10mS delay which is significant at audio frequencies.The SDcard runs off the spi i/o not so?

Can I xmit data faster than 10mS per byte to SDcard?
 
With EEPROM you can write a minimum of 128 bytes every 5mS = 25k/s. SD card vary from 2M/s up to 10M/s.

Edit, an alternative might be Serial Flash that can write a byte in 7uS.

Mike.
 
Last edited:
ronsimpson said:
That is not easy! How are you going to do that?
Click to expand...

EPE magazine did just that a few years ago, using a low cost PIC 16C84 as a guitar tuner in 1997 - there's no need to store massive samples.


Source code is here:

**broken link removed**
 
Or, if you just want a guitar tuner and have an Android phone, install the free app called gstrings. Works wonderfully, I now just need to practice the guitar more.

Mike.
 
Nigel Goodwin said:
EPE magazine did just that a few years ago, using a low cost PIC 16C84 as a guitar tuner in 1997 - there's no need to store massive samples.


Source code is here:

**broken link removed**
Click to expand...

Thx for that Nigel, it helps. But I need to store the notes and then upload em after a performance. Also, any idea where the schematic for that tuner might be found?
 
Mosaic said:
Thx for that Nigel, it helps. But I need to store the notes and then upload em after a performance. Also, any idea where the schematic for that tuner might be found?
Click to expand...

It was in the magazine, which you can buy on-line as a PDF - unless you can find it posted somewhere?.
 
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