Hi, when trying to program my nrf51822 chip, I went through the following error streaks:
1.I started to get "no device found error". Can be easily solved by turning off the board (custom designed) and back on again.
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Same error, but have to switch off the board AND pull & plug back in the usb cable for Jlink debugger.
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Same error, but all the above steps stopped working, I have to restart my computer to be able to download it.
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Completely unable to download my app, **JLink Warning: RESET (pin 15) high, but should be low. Please check target hardware. error were thrown by keil uv5.
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Because of #4, I tried to use nrfGo studio's recovery function. And when I clicked the "recovery" button, I got the error "Recover failed: invalid operation error".
A few things to clarify:
- I did not purposely try to lock the chip, I could have accidentally locked it but it's highly unlikely. One does not simply "accidentally" lock a chip.
- The power supply seems to be fine, at least the voltage is in the accepted range - 2.4 volt.
Please help?
Edit: It is possible that the chip was damaged. The problems described above started when I attached an oscilloscope probe to the board. It is very rare but it is possible. Even though I completely refuse to believe such a possibility, because I have never run into such an occasion.
