Arduino SPI Communication with a EEprom ST M95020

In this video I play with an Arduino to go over how the MCU communicates with the EEprom to read the stored data. Its not really for the practical use but just the educational value of it.

[@autumnjeserich2689]

Well I was trying to learn about the SPI bus because I want to read the bin off the eeprom off this escalade bcm to change the hex code. How would you suggest writing to the EEPROM?

[@bickyou4696]

very good, now i know how to read an eeprom😘

[@FixedUntilBroken]

No prob! Glad you liked it

[@TrendingWithMatt]

Nice video! I am working on a similar project except for an 03 Toyota Corrolla. I have one method of reading the odometer, that I am about to setup, but really wanted to be able to do it with my Arduino and just did not know how to setup the SPI protocol. Toyota had an issue with their odometers stopping at 299,999 and no solution other than to have the dealer replace the whole cluster and mark it "Add 300k Mi to Od". I wanted to alternate way and may try this.

[@greggregory2267]

Hi , great video , any chance to access the scetch somewhere ? also if you could explain what does move bit 8 to bit 11 does ?

[@FixedUntilBroken]

yes its on github github.com/garnerm91/st95020

[@nirmalnath6791]

Then how to write..?

[@thehotknot]

Thank you, it is a nice video , it is different than others video. I would need some advice , I am tying the same thing with ST72F561K. It is a engine interface for suzuki marine engine. i already bought 3 units for my boat but it is not reliable because keep breaking . I have the original program but of course i could programit with an onboard GPS potter. I did try with your way but not reading it at all. Any help ? Thanks .

[@FixedUntilBroken]

Well thats an MCU not a epprom. glancing at the data sheet it doesn't look like it talks Jtag. Not an MCU I am familiar with but the datasheet it out there so it shouldn't be too hard to talk to but the first page of the datasheet do mention read out protection so you might be locked out of it.

[@thehotknot]

thank you, yes that is what i thought, i will try to resetting and delete all and see if it is working after.if it is than it is blocked, thanks any way

[@lachimohammed2964]

Ok

[@mauricepost8650]

hi, great video! so this should also work on a 95080 chip? do you have a sketch for this?

[@FixedUntilBroken]

I haven't had a need to do it yet but someone emailed me saying they did. All they did is double the read /write cycles

[@FixedUntilBroken]

Btw someone did a pull request on the github I think it's broken at the moment I'll re-upload the old one soon

[@idrift314]

Thank you!!!! I’ve been trying to figure this out with my escalade cluster for two weeks now (in my spare time) and nobody seems to give a clear explanation. Possible that I’m a visual learner. But nonetheless MUCH appreciated 👍🏻👍🏻👍🏻

[@FixedUntilBroken]

I'm glad you found it useful. If your interested in how anything else works on the cluster let me know and I'll try to look into it. Maybe do a future video on it

[@idrift314]

I’m having another issue with a different cluster that basically won’t do anything aside from light the backlights after removing and reinstalling the board that the eeprom is on. Do I just have a bad solder joint or is there an onboard fuse? I’ve had it happen twice now

[@FixedUntilBroken]

@@idrift314 hard to say without seeing it. Did you have any lifted pads? I'm assuming your talking about the 99-02 stuff

[@idrift314]

Fixed Until Broken yep. 99-02 and no no lifted pads

[@idrift314]

Fixed Until Broken I use flux and low temp. I have a hot air station as eell