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preenfm2 and preenfm3 / Testing the PreenFM405 board
« on: October 04, 2017, 06:40:56 PM »
Hi There,
I built my own Preen and Preen405 PCBs up, soldering all of the components including the SMT stuff. The STM32F4 was stupidly hard, you really need better than 10x magnification to do this properly. I don't and my vision even with a 6x magnifier is bad. Anyway, firmware loaded like a breeze... Everything works perfectly, except the MIDI RX. It connects to Ableton on USB, all the controls, menu, sounds work perfectly. Except the MIDI. I triple checked the wiring, Opto-isolator, diodes everything. There is signal going through the opto-isolator, and to the pins on the 405, but it looks like pin 5 (according to the schematic) is where the RX signal hits the STM32.
I do not have probes that are small enough to test this pin, but does anyone know if there is a tool I can use with the ST-Link that can test all connected pins?
Sort of an in-place testing software.
Thank you.
I built my own Preen and Preen405 PCBs up, soldering all of the components including the SMT stuff. The STM32F4 was stupidly hard, you really need better than 10x magnification to do this properly. I don't and my vision even with a 6x magnifier is bad. Anyway, firmware loaded like a breeze... Everything works perfectly, except the MIDI RX. It connects to Ableton on USB, all the controls, menu, sounds work perfectly. Except the MIDI. I triple checked the wiring, Opto-isolator, diodes everything. There is signal going through the opto-isolator, and to the pins on the 405, but it looks like pin 5 (according to the schematic) is where the RX signal hits the STM32.
I do not have probes that are small enough to test this pin, but does anyone know if there is a tool I can use with the ST-Link that can test all connected pins?
Sort of an in-place testing software.
Thank you.