On Thu, Dec 18, 2014 at 8:09 PM, Darcy Watkins <dwatk...@sierrawireless.com> wrote: > Hello, > > In my target system I have a microcontroller (MCU) that handles some I/O, > power supplies and system boot up to the point of taking the main CPU out of > reset. At present, we build the MCU firmware from source and then the binary > file is packaged to be used as payload with an MCU firmware update utility. > > Now my main question... does anyone have suggestions (or is there a 'yocto' > way) to build such a cross compiler for the MCU so that it can be invoked to > build MCU firmware from source as part of the bitbake build for the Linux > target's image. The idea would be to build MCU firmware image from source > using the MCU cross compiler, but obviously to build drivers and utilities > that run on the main CPU using the normal cross-compiler toolchains built > under yocto. Then I could package the payload firmware image along with > utilities all as part of the same RPM package. > > The MCU cross compiler we use was originally generated using crosstool-ng, > and is essentially a gcc cross compiler for 'bare metal' MCU target. > > Does anyone who has gone down this road have suggestions? > > Thanks in advance! > > > Regards, > > Darcy > > Darcy Watkins :: Staff Engineer, Firmware > > SIERRA WIRELESS > Direct +1 604 233 7989 :: Fax +1 604 231 1109 :: Main +1 604 231 1100 > 13811 Wireless Way :: Richmond, BC Canada V6V 3A4 > [P2] > dwatk...@sierrawireless.com :: www.sierrawireless.com :: > www.inmotiontechnology.com > > -- > _______________________________________________ > yocto mailing list > yocto@yoctoproject.org > https://lists.yoctoproject.org/listinfo/yocto
Hi Darcy, if I understand correctly you use the standard toolchain for the target image and a custom $CC to build one custom binary. We use klcc for a couple of klibc-static-recipes thus we created a .bbclass to be inherited. See http://cgit.openembedded.org/meta-openembedded/tree/meta-initramfs/classes/klibc.bbclass Regards Andrea -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
