madsci1016
Member
I have a Teensy 3.2 that seems to randomly, 80% of the time, power up into bootloader, or at least never runs user code. It's powered externally by 3.3V applied to the 3.3V pin and the VUSB jumper has be cut. There's no USB connected when this happens.
If It powers up this way, I usually have to connect it to my computer, run the teensy bootloader and tell it to start user code. A simple power cycle doesn't fix the problem.
Any suggestions on how to fix this? I need it to reliably enter user code mode at power up with no USB connected.
I've looked at the schematic and releaized there's a second processor on board, an M0 that sits between the a USB pin, the programming pin and a reset pin on the M4. What's it's function during boot up / programming?
If It powers up this way, I usually have to connect it to my computer, run the teensy bootloader and tell it to start user code. A simple power cycle doesn't fix the problem.
Any suggestions on how to fix this? I need it to reliably enter user code mode at power up with no USB connected.
I've looked at the schematic and releaized there's a second processor on board, an M0 that sits between the a USB pin, the programming pin and a reset pin on the M4. What's it's function during boot up / programming?
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