RE: Can't download code to NRF52832 chip

abdosalm — Mon, 13 Jan 2025 14:44:38 GMT

I don't know how a "voltage difference between your board and Segger device" can occur. Both grounds of the 2 boards are connected, and all of the signals are 3.3V signals. And yes, there are level shifters on the black magic probe side. I really don't know what caused this problem but it's working with my black magic probe. So, I guess I am happy with it.

RE: Can't download code to NRF52832 chip

Asbjørn — Mon, 13 Jan 2025 13:26:33 GMT

Hello,

It sounds a bit random the behaviour and in those cases we start with having a look at the power supply of the device and the programmer. It does seem like you've gotten your setup to work, but I suspect there's a voltage difference between your board and the Segger device. It might allow for RAM and registers to be read, but not reliably Flash memory. This can be handled better either by luck, more similar voltage, the "Balc magic probe" able to deliver more current or there's level shifters involved on the second programmer.

Have you checked the voltages between the programmer and device? Is it the same or close? Are you still seeing problems with your setup?

Best regards

Asbjørn