Congrats to Varun, Pierre, and Tak: the FC carrier board works! - I can talk serial to the TQM5200 and watch it boot. - I can see that it correctly identifies the 4 GB flash drive.
.. and so far, that's it. Still to test: USB and CAN. There were issues, including: - I screwed up soldering the LTM4629 micromodules. Should have baked the solder in the vias-in-pads first. But Screaming Circuits fixed the micromodules LGA for free (thanks guys!), and now they work. - The MAX5902 in the front end was overcurrent triggering for no real reason; turns out their spec for DRAIN in was terribly off. So I removed a resistor from the drain path to the MOSFET, and now it works. - The octal buffer for the LEDs had an active low input, but was tied high. So, now on to making an official breakout board so we can test USB. Andrew -- ------------------------------------------------------- Andrew Greenberg Portland State Aerospace Society (http://psas.pdx.edu/) and...@psas.pdx.edu P: 503.788.1343 C: 503.708.7711 ------------------------------------------------------- _______________________________________________ psas-avionics mailing list psas-avionics@lists.psas.pdx.edu http://lists.psas.pdx.edu/mailman/listinfo/psas-avionics
