I have just finished a robotics project, which is due in a competition in a couple of hours.
I have a problem: when my code sets one of the pins for the servo motor high, waits for a tiny amount of time then sets it low again, my raspberry Pi a+ crashes, with only the red power LED showing. The servos are powered off a completely separate battery pack to the raspi, their only connection being the control pin.
As I'm on the way to the competition and I don't have a screen or keyboard and mouse, I can't access the code to try and fix it, or try and switch to PWM. I could however plug the SD into a laptop and look at / edit the code to use PWM, but I can't find a way how to.
Could this be a hardware issue, and if so how could I fix it? Or, can I access the code from the SD card?