DIYEFI.org Forum

http://www.mostthingsweb.com/wp-content/uploads/2012/09/boards.jpg http://www.seeedstudio.com/depot/fusion-pcb-service-p-835.html Same price as itead but better quality. http://oshpark.com/ Very good quality, made in the US. http://www.eurocircuits.com/index.php/component/content/article/4-services...

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, b...

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 ...

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...

I get the point I guess :) I pointed the 32b timers things as a bonus, not a necessity. After a quick search I just found a cheap (35e) 144pin board, just need to add some circuitry on the carrier board to make it an ecu. I never said you should move to another platform. I wouldn't. I totally unders...

Well, there's a bunch of reasons for choosing another processor. I will take a generic Arm CM3 for comparison. - Cortex M3s were already on the market 5 years ago. It is widely used as of today. - There's many cheaper 32 bits processor which outperform the S12X on all aspects, including timers (16b/...

For the serial, you should really check http://gitorious.org/qserialdevice . it's a very good library.

Hey Fred, I'm wondering why you picked a 16bit MCU, now that 32bit Mcu are cheaper and much faster. I'm now comparing a bunch of free and commercial ECUs, most commercials are using 32 for almost a decade. (lots of Renesas, Freescale...) Honestly, if I were to build my own I'd go with something like...