ChibiOS Free Embedded RTOS

Thanks guys for the helpful insight: @Giovanni: Yep, I did look briefly at p7zip, but it seems it is LGPL which will not be compatible with static linkage. Also, it is written predominantly as C++ code which I don't think would fly for this project. @Polux Yes, this is a case of the end-user reqs do...

Hi all, I was asked today about implementing zip file compression on a micro, most likely using fatfs on top of an SDCard. Just wondering if anyone has blazed this trail before and could offer any advice on existing software (preferably free licensed, but commercial licenses wouldn't necessarily be ...

Unfortunately, those changes do not seem to fix my original issue. I tried both trunk (r13183), as well as stable_19.1.x branch (r13176) from SVN. I verified both had the line steved mentioned in the corresponding rules_code.ld. I tried with both gcc-arm-none-eabi-7-2017-q4-major and gcc-arm-none-ea...

That's a shame they missed merging the cortex-m0 fix prior to the last round of releases. Giovanni, based on what you've seen so far (and ignoring the cortex-m0 issue), is GCC 9 shaping up to be decent across most of the spectrum? I recall reading the last benchmark thread done between GCC 7 and 8, ...

Hi Giovanni,

I'd be happy to test, it will be at least mid next week before I'll be near that hardware. Should I be testing off the trunk, or 19.x maintenance branch, or both?

Dave

Usually when I'm setting up a new project, I use ST Micro's CubeMX tool as an augmentation to the manual. It has a graphical clock tree for each device, and you can immediately see the outcome of changes you make on all the various subsystems. As Giovanni said, it's quite complex (especially the new...

Hi Giovanni, Please have a look at this example I threw together. It simply enumerates as a HID gamepad, then cycles through pressing each button and joystick direction on a timer. See readme for how to view the gamepad on the host OS. It is derived from the current 19.1.2 release. I fashioned it li...

Yep, simple is what I'm thinking. I have found that modern desktop OS's usually have some UI support for reading and displaying the state of joystick/gamepad devices but the trick is in making a descriptor that it accepts as such. I've found that just having a HID with some buttons isn't enough, you...

Ok, I got back to this project again and tried a fresh tact. I found an older demo code in the forum pointing to this repo https://github.com/guiduc/usb-hid-chibios-example.git Which was based upon 2.6.x Chibi release, but it worked as advertised and was simple enough to understand. I then modified ...

Giovanni wrote:It should be an interrupt endpoint, I think it is part of the standard but it is not used in demos.

Yep, but shouldn't I be able to write to it? It may mess up the host end, but I would expect it to transmit the bytes)?