On Tue, Apr 26, 2016 at 12:20 AM, Zheng Bao fishbaoz@hotmail.com wrote:
https://chromium.googlesource.com/chromiumos/platform/ec https://chromium.googlesource.com/chromiumos/platform/ec https://chromium.googlesource.com/chromiumos/platform/ec
Hi, Stafan & All, I am trying to build a platform which uses AMD APU + EC.
My goal is let EC
- give the power sequencing logic to APU
- play as a generic EC which has features like keyboard, UART.
Currently, I don't have plan to boot chrome OS yet.
So I need you guys give me some advice. Does chromeOS-EC meet my requirement?
Yes, it should. However there is only support for a limited number of ECs.
Is it OK if I don't boot chromeOS?
Yes. Most of the verified boot logic is in the host firmware (coreboot/depthcharge).
Is chromeOS-EC hard to master?
I'd say it's moderately difficult, but not bad. The mess of config #defines can be frustrating (ctags and grep are infinitely useful) but the design makes sense for something that is optimized for minimal code size and reusability among different ECs.
I don't know how easy/difficult it is compared to other EC firmwares. I suggest using ctags to walk thru the initialization code in common/main.c to see how initialization is done, and also choose a specific board (with your preferred EC) to study how GPIOs, interrupts, tasks, hooks, etc. are used.
Try posting to chromium-os-dev@chromium.org. There are several EC developers who read that list and can answer questions.