lanefu Posted January 1, 2021 Author Posted January 1, 2021 Hey i know there's been great progress on the sd mux board, but the worksonarm folks pointed me to some other reference designs so i thought I'd share. I believe the kicad files are in their git https://wiki.tizen.org/SDWire https://wiki.tizen.org/SD_MUX
lanefu Posted January 1, 2021 Author Posted January 1, 2021 On a similar note. I've made progress on my poor man's testing rig for power control and ttl console. I have some info here but currently docs are focused on gpio control
Tido Posted January 7, 2021 Posted January 7, 2021 Looks like 'old news' in the same thread 1,5 years ago https://forum.armbian.com/topic/10841-the-testing-thread/?do=findComment&comment=83029 On 1/1/2021 at 4:07 PM, lanefu said: I believe the kicad files are in their git https://wiki.tizen.org/SDWire https://wiki.tizen.org/SD_MUX
Tido Posted January 7, 2021 Posted January 7, 2021 @Heisath is this the latest news on the hardware front or is there another thread? https://forum.armbian.com/topic/11022-serial-console-mux-with-pwr-switch-hat-ordering-thread
Heisath Posted January 7, 2021 Posted January 7, 2021 1 hour ago, Tido said: Looks like 'old news' in the same thread 1,5 years ago https://forum.armbian.com/topic/10841-the-testing-thread/?do=findComment&comment=83029 Yes that is old and only limited switch capability given. 1 hour ago, Tido said: @Heisath is this the latest news on the hardware front or is there another thread? https://forum.armbian.com/topic/11022-serial-console-mux-with-pwr-switch-hat-ordering-thread Correct that thread is pretty up-to-date. I have received the boards and confirmed the Power and Serial Mux is working (with minor changes). Currently we are developing the firmware for the sdcard muxer (STM32 based). The hardware of the sdcard mux seems good, I was able to connect a sd card to USB (and read with PC) and also to some SBC and boot it with reasonable fast speeds. The current step is advancing the firmware so it is possible to select which SD card to mux where via USB or I2C. You can check the state on the github https://github.com/armbian/mpads 1
Technicavolous Posted February 26, 2021 Posted February 26, 2021 On 1/7/2021 at 4:47 PM, Tido said: @Heisath is this the latest news on the hardware front or is there another thread? https://forum.armbian.com/topic/11022-serial-console-mux-with-pwr-switch-hat-ordering-thread I get a message that I don't have permission to read that thread ... :[ Still interested in this, I'm much stronger in hardware. 1
Igor Posted March 1, 2021 Posted March 1, 2021 On 2/26/2021 at 3:22 AM, Technicavolous said: I get a message that I don't have permission to read that thread ... :[ Only initial communication, very much irrelevant, was happening in the private forum. Everything else is here, in this thread and on Github.
Tido Posted March 2, 2021 Posted March 2, 2021 On 2/26/2021 at 3:22 AM, Technicavolous said: Still interested in this, I'm much stronger in hardware. If you are, then follow @Heisath The current step is advancing the firmware so it is possible to select which SD card to mux where via USB or I2C. You can check the state on the github https://github.com/armbian/mpads
Heisath Posted March 3, 2021 Posted March 3, 2021 Hi, sorry for the late reply. Current state @Technicavolous : Hijax and I are pretty busy at the moment so project is progressing rather slow, but: Hijax is done with the final (?) revision of the power&serial mux board. You can check it out here: https://github.com/armbian/mpads/tree/serial-mux-updated Also we are working on the SD card muxing which is surprisingly hard: https://github.com/armbian/mpads/tree/sd-card-mux-redesign On the master branch I am working on the firmware for SD card muxer: https://github.com/armbian/mpads/tree/master (warning, the kicad files there are outdated. We should merge the branches). Current state of the software/hardware combo is something like: - Power/Serial working and controllable via i2c with a small script. - sd card can be selected via I2C and gets accessible to the host with STM32 - sd card can be attached to the slave. Main problem is stability and powering of the sdcards (related). Also there are some issues with the usb/mass storage driver in the STM32 but it is somewhat working. 3
Recommended Posts