I was wondering why you picked it in the first place actually.
For the 3.3v, most chips are 5v tolerant on nearly all their pins. This is the standard nowadays.
What I mean by starting fresh is that I'm still evaluating options, I could start from scratch if I don't find anything that suits my needs. Else I would help with an ongoing project.
Fabien.
MCU Choice
Re: MCU Choice
OK :-)mobyfab wrote:I was wondering why you picked it in the first place actually.
ADCs? That's the main one.For the 3.3v, most chips are 5v tolerant on nearly all their pins. This is the standard nowadays.
What exactly are your needs?What I mean by starting fresh is that I'm still evaluating options, I could start from scratch if I don't find anything that suits my needs
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Re: MCU Choice
ADC is not a real problem since you can use 3.3v as a reference instead.
Or do something like analog multiplexer -> voltage divider -> (opamp to reduce resistance / protect ADC) -> ADC if you really need a 5v or higher source.
I need a common 32bits MCU, Arm would be the best.
The goal is to make a standalone ECU for race motorcycles, so basically 8 injectors (staging), 4 ignitions drivers and knock detection.
Or do something like analog multiplexer -> voltage divider -> (opamp to reduce resistance / protect ADC) -> ADC if you really need a 5v or higher source.
I need a common 32bits MCU, Arm would be the best.
The goal is to make a standalone ECU for race motorcycles, so basically 8 injectors (staging), 4 ignitions drivers and knock detection.
Re: MCU Choice
I guess that's OK with high precision resistors.mobyfab wrote:voltage divider -> (opamp to reduce resistance / protect ADC) -> ADC if you really need a 5v or higher source.
Too easy :-)The goal is to make a standalone ECU for race motorcycles, so basically 8 injectors (staging), 4 ignitions drivers and knock detection.
Wait, is that need related to the above goal? Or just a desire? ;-)I need a common 32bits MCU, Arm would be the best.
I look forward to hearing about your progress.
Fred.
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n00bs, do NOT PM or email tech questions! Use the forum!
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Re: MCU Choice
I could use any MCU that suits the requirements, it's just that I'm used to ARM (more precisely STM32, which are the most common CM3s) and everything that comes with it (tools), so it's easier.
Also I want to use the most common components I can to make it easy/cheap to build. (still gonna be SMD, but reflow it not that hard)
The ultimate goal is to make a generic board, and an I/O board that's made to be compliant with the original MCU pinout/connectors/sensors.
It's not so much the hardware that's complicated, as you know
I already have a clear picture of what I need on the board.
You can add traction control, quick-shifter, exhaust valve control, wideband & thermocouple controller to the above requirements
Also I want to use the most common components I can to make it easy/cheap to build. (still gonna be SMD, but reflow it not that hard)
The ultimate goal is to make a generic board, and an I/O board that's made to be compliant with the original MCU pinout/connectors/sensors.
It's not so much the hardware that's complicated, as you know
I already have a clear picture of what I need on the board.
You can add traction control, quick-shifter, exhaust valve control, wideband & thermocouple controller to the above requirements
Re: MCU Choice
Yes, I know it well ;-)
It goes like this:
Hardware < Software < Firmware < Community.
I'm looking to build the latter around the one before it, which then spawns the other two. This is the challenge and it's much much bigger than one little forum can hope to convey.
Fred.
It goes like this:
Hardware < Software < Firmware < Community.
I'm looking to build the latter around the one before it, which then spawns the other two. This is the challenge and it's much much bigger than one little forum can hope to convey.
Fred.
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!