Marc Kleine-Budde writes: > On 8/16/19 12:52 PM, bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx wrote: > > STMicroelectronics provides STLINK-V3Set and STLINK-V3Mini ( > 10 > > Euro) primary for SWD/Jtag debugging via USB. However bridge functions > > are implemented for Uart, GPIO, I2C, SPI and CAN. A library (*1) is > > provided to use these bridge functions, stacking on some device > > library (*2) stacking finally on libusb. > > What do you mean by bridge functions? Bridge is what STM call this function. They describe is as "The bridge API (STLINK-V3-BRIDGE) is a set of source files allowing the development of personal computer applications exercising the STLINK-V3 bridge interface of a target board." It is normal USB communication, with the basic USB protocol hidden/abstracted by a library. > > In a proper designed system, you want to have UART, GPIO, I2C, SPI and > CAN drivers in the kernel, not implemented in user space. > This would imply the USB protocol open or reverse engineered or leaked. For the JTAG/SWD part this is already done (OpenOCD, pyOCD, blackmagic debug probe), also only in user space. For the "bridge functions there are not (yet?) open specifications. > > Using these dongles as socket-can adapters would come handy. > > Does the license allow you to cerate any open source software with it? > https://www.st.com/content/ccc/resource/legal/legal_agreement/license_agreement/group0/87/0c/3d/ad/0a/ba/44/26/DM00216740/files/DM00216740.pdf/jcr:content/translations/en.DM00216740.pdf looks like. > > However this would imply a user-space socketcan adapter. Is such a > > thing possible? > > Create a vcan and attach your userspace components to it. > Is there some example code doing something similar? Thanks -- Uwe Bonnes bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 1623569 ------- Fax. 06151 1623305 ---------
