goyousalukis Posted March 28, 2018 Report Share Posted March 28, 2018 Quick question: It is my understanding that I can plug a USB keyboard directly into the SEQ to control transposition, Arp, CV outs, etc... Since the USB keyboard is powered by USB, I would assume that I need to bridge Pin PA9 to 5V in order to give the USB Keyboard power via the micro USB. Is this correct? I am using my own MeanWell 5V power to power the SEQ. Is there any issue if I bridge the pin and then connect the seq to a PC via USB? I am worried that I could fry something if I use my own power supply and then plug the micro usb port into my PC. Thanks, Justin Quote Link to comment Share on other sites More sharing options...
slo Posted March 28, 2018 Report Share Posted March 28, 2018 I fitted a switch and a USB connector to the SeqV4 case to put the SeqV4 into USB host mode. The switch jumps R59 on the Discovery board to ground, then you can use a USB keyboard controller, which then receives power from the SeqV4. For firmware updates I power down, unplug the power supply, switch USB modes and connect the PC. I don't know what PA9 does but that might be a better way to simulate what is basically an OTG USB cable A lot of good info here. Quote Link to comment Share on other sites More sharing options...
goyousalukis Posted March 28, 2018 Author Report Share Posted March 28, 2018 Thanks, that helps a lot. I considered the idea of a slide switch also. I appreciate the link... Quote Link to comment Share on other sites More sharing options...
gohan2a Posted November 20, 2018 Report Share Posted November 20, 2018 (edited) That does not work for me, the keyboard led blinking, after restart or after push reset button on STM32F4 I have connected a 5V PSU to J2 of the MBHP_CORE_STM32F4 module, and plug the jumper USB PWR J17 An idea? mios32_bootloader_v1_018 / midibox_seq_v4_094b / CME Xkey RESOLVED "If you don't have a "special" USB OTG cable, connect pin PA10 to 0v (ground)" Thanks Latigid on Edited November 21, 2018 by gohan2a RESOLVED Quote Link to comment Share on other sites More sharing options...
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