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144 mcu analysis #18

Closed rusefillc closed 2 years ago

rusefillc commented 3 years ago

would 144 be a drop-in replacement or would it change stm32 pinout?

rusefillc commented 3 years ago

no 176 in stock now :(

andreika-git commented 3 years ago

144 package does not have PORTI, so the STM32 pinout is somewhat different. image

andreika-git commented 3 years ago

See https://github.com/andreika-git/hellen-one/issues/69

mck1117 commented 3 years ago

Could we even use lqfp100? Availability is generally even better.

rusefillc commented 3 years ago

https://docs.google.com/spreadsheets/d/1Oi-ayiBKMik0VjysqX8SO5DXGRZS86JXxW8IeL1-LhU

BeerMoneyMotorsports commented 2 years ago

do we want to consider adopting this change as part of the 94 pin update? The thought is to mimic the NB1 design for 94 pin update with msm support.

BeerMoneyMotorsports commented 2 years ago

rev E utilizes 144pin MCU. STM32f407zgt7

rusefillc commented 2 years ago

@BeerMoneyMotorsports that would require two different yaml files or some other software provisions. Board ID hardware could be helpful to facilitate options on software side

BeerMoneyMotorsports commented 2 years ago

@rusefillc with such a drastic change, it may be good to just break the chain and create new yaml? I will need your expertise to devise and good solution.

Currently, per my direction, the NB2 rev E is a copy of NB1 design with updated pinouts. it seemed to be the simplest solution but I clearly did not take into account the difference in chips effect on firmware.

Can we make NB2 rev D an end of life and rev E starts a new generation?

rusefillc commented 2 years ago

do we kill old NB2 binaries and not support old NB2 hardware? do we kill old NB2 page? do we somehow mix old and new help content on same wiki page?

I am totally fine adding new yaml file but that would be a lot of hard work here and there to make this mess less confusing

board-id stuff was never fabricated so far but I hope there are no down sides to having it on the boards https://github.com/andreika-git/hellen-one/issues/105 https://github.com/rusefi/hellen128merc-issues/issues/38 in order at least to attempt fancy approach

BeerMoneyMotorsports commented 2 years ago

The decision was made to maintain 176 pin chip for NB2. I have purchased 40 for my personal stock at JLCPCB. Closing the issue.