board ID solution - Githubissues

andreika-git / hellen-one

Hellen-One Hardware Platform for rusEFI Engine Management System

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Open rusefillc opened 3 years ago

rusefillc commented 3 years ago

it's desired for firmware to be able to identify board type / board revision

rusefillc commented 3 years ago

as few stm32 lines as possible
256+ options desired
looks like I2C is the answer
back side and hand assembly of one SMD component acceptable as long as binary index is applied by copper in gerber

mck1117 commented 3 years ago

we can also apply index with DNPs - install N pullup resistors, and optionally up to N pulldown jumpers

mck1117 commented 3 years ago

Though using the same method as pullup/down inside other modules is probably the right move.

rusefillc commented 3 years ago

as long as we JLC assemble it would have to be copper if we use back side due to top side space shortage

mck1117 commented 3 years ago

yes, copper is certainly much more space-efficient

Qwerty-OFF commented 3 years ago

PCF8574T/3,518 C7605 - 8 POR I?C 100kHz SOIC-16 PCF8575TS/1,118 C12251 - 16 POR I2C 400kHz SSOP-24_208mil Interface