![]() ![]() Will test again with oscilloscope some time) (But i have measured with a slow DMS - maybe the keys are tested only for a short periode of time, and the DMS integrates over it. * In normal mode, but screen (and blue leds) switching off: 0.5VÄ«ut even with from that mode (with 0.5V) the sansa can detect keypresses. ![]() * If the Sansa-Bootscreen appears and in normal mode: 3V * After power on, but in the wait-loop: 1.9V Maybe one problem: Measured the voltage on the switches again - one side is always ground the other one: Tried all 8 bitmasks for GPIO1 (which is hopefully GPIOA): no reaction to keypresses - every time it waits the ~5 seconds. Noloop: ldr pc, originalentry(Test now in the loop - maybe to circumvent timing problems) * Now branch back to the original firmware's entry point */ Mov r1, #0x500000 /* Approximately 5 seconds */ * A delay loop - just to prove we're running */ Code: /* This value is filled in by mkamsboot */
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