In SX Microcontrollers, SX/B Compiler and SX-Key Tool, John Kauffman wrote:

Jon:

I studied your version. I expected:
The 8 LEDs show the value one for half second, then LEDReadFLag comes on while 8 LED still displays 1 (because it read one from EEPROM) for another half second.
Then pause 1.5 seconds
Then repeat for two, etc., changing about every 2.5 seconds up to 255

On several tries no luck, it shows one LED continiously. LedReadFlag is not coming on at all.
It is late here, I am going to recheck all hardware in morning and test section by section.

My first instinct to troubleshooting is to break down the parts and test each. I have not come up with a more basic code to test the EEPROM. LEDs can be reduced down to a simple HIGH LOW. For the EEPROM all the parts have to work immediately (addressing, timing, read, write, etc.) If anyone can think of a way to divide out those functions I could break down the troubleshooting.

Also tomorrow I will try Jon's code with just one read and write rather than a loop.

Two question for testing tomorrow:
Will same code work with 24LC256? I want to test by swap out the EEPROM & don't have another '32 .
Can I use internal 4Mhz or must stick with 4 Mhz Murata?

Thanks.

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