Rerouter wrote:The eeprom is spi type??? trace him out and see where he connects, that will be at least 1 set of your spi pins, in this arrangement i would imagine a few devices to be in parallel with the eeprom each with a chip select line, if so you could hijack the chip select line to use your own custom display, or at-least read-modify-write the content,
Nah nah, must of mis-read me. Im *assuming* the LCD's on the cluster are SPI. Could be I2C for all I know! Was hoping I could find a nice little set of "dev/factory" header pins. Or a jtag or something alike. Or, Like iv done on some holden stuff. Probe the mcu chip using the bus pirate and try identify what protocol is being used.. and decrypt some of the basic commands.
Although.. I had a datasheet for that to identify what pins did what so I could quickly see which were spi!
I could alternatively just hoop up to all the LCD pins to the bus pirate and enable the basic oscilloscope . It has protection for over 5v signals so if the LCD runs on 12v rail then doesnt even matter if I connect up to that.
Ill write down all the chips on board and see if there isnt an LCD driver or something that we can interface with. Will definitely be probing the BA/BF ICC's eventually since they have a perfect little SPI (its even written on pcb!) header to connect up to the LCD's.
Rerouter wrote:And for the love of... buy one of these already rather than risking tearing an eeprom in half,
http://www.ebay.com.au/itm/858D-Desolde ... 1609993734 , combine it with some pen flux and leave it set to 300 degrees,
Been looking for a desoldering hot air gun but wasnt sure how "reliable" those cheap units were. If its anything like buying a cheap hot glue gun.. the bastards will start melting them selfs (good one ozito!). But for $50.. why not?!
Rerouter wrote:If you must use an iron, then add excessive solder and lay the iron along the troubled side, its most likely the ground plane causing an issue on a ford, so you will need to get a ridiculous amount of heat into that piece of copper,
But since Iv only got the ion at the moment, Ill be sticking to it for this one read. Yeah, thats what I did for the easy access side. Little bit of solder then applied ion on all 4 pins and that side lifted without any force or issues. I still havent done the other side since I havent worked out how with that stupid component sitting pretty much directly on one pin. Cant get the ion on all 4 without clipping it.. soo as much as I dont want to, Ill have to slightly lift that one pin, then lift the other 3 together.
Rerouter wrote:you should be able to tell fairly easily from the mileage line whether or not the dump is read correctly, generally reading the wrong type will either result in doubled content, (every other byte, then repeated from half way down the dump) or doubled bytes, both of which should be eaily obvious,
Thats what I was hoping. But, I wont resolder the eeprom until Im 100% sure Iv gotten a clean read on it. Might pop over to jay car and pick up a dip8 socket. But, the eeprom legs are petty small and thin so I dont know how much of a beating it can take with constant pulling from the socket.
Cheers Matt Ill use that also as a check byte.
