NRF51-DK programming custom board problem

RE: NRF51-DK programming custom board problem

bjorn-spockeli — Thu, 15 Dec 2016 15:16:41 GMT

Glad to hear that you're able to flash the custom board :)

RE: NRF51-DK programming custom board problem

sonnyz — Thu, 15 Dec 2016 14:58:14 GMT

Thank you Bjorn! Tried a few more times, it suddenly worked! I didn't change anything, maybe there was bad connection somewhere. Now it's good, BT is running now. BTW, the message shown above is the same for programming the DK and custom board. Even if you are programming the 51822 chip, it still show the same Device and VTarget info above. Thanks again!

RE: NRF51-DK programming custom board problem

bjorn-spockeli — Thu, 15 Dec 2016 13:55:42 GMT

I just tested programming a nRF51 DK (nRF51422 QFAC ) with a nRF52 DK (nRF52832 QFAA ) and the correct device should show up when you flash the firmware, see below.

Target info:
------------
Device: nRF51422_xxAC
VTarget = 3.300V
State of Pins: 
TCK: 0, TDI: 1, TDO: 1, TMS: 1, TRES: 1, TRST: 1
Hardware-Breakpoints: 4
Software-Breakpoints: 8192
Watchpoints:          2
JTAG speed: 1000 kHz
 
Erase Done.
Programming Done.
Verify OK.
Application running ...
Flash Load finished at 14:50:34

Are you sure that your connections are correct? Please see this blogpost and confirm that you're connecting the pins correctly.

RE: NRF51-DK programming custom board problem

sonnyz — Wed, 14 Dec 2016 16:02:03 GMT

In DK user guide page 20 it says "Note: The voltage supported by external debugging/programming is 3.0 V", my custom board power supply is exactly 3V, while the VDD of DK is 2.85V. I have tried to use both power to the custom board but it's the same result. What makes me confuse is that the programming process and message is exactly the same for both internal chip (51422) and the external chip (51822). Here is the same message for both:

Target info: Device: nRF51422_xxAC VTarget = 3.300V State of Pins: TCK: 0, TDI: 1, TDO: 1, TMS: 1, TRES: 1, TRST: 1 Hardware-Breakpoints: 4 Software-Breakpoints: 8192 Watchpoints: 2 JTAG speed: 1000 kHz Erase Done. Programming Done. Verify OK. Application running ...

So I don't know if it's correctly loaded to the custom board or not (the device info and voltage is not right). Or do I need to change code in Keil for the custom board? Thanks!

RE: NRF51-DK programming custom board problem

bjorn-spockeli — Wed, 14 Dec 2016 12:32:05 GMT

Are you powering the custom board from the VDD pin of the nRF51 DK? The supply voltage of the nRF51 DK and the custom board must be identical, otherwise you will program the nRF51 DK and not the external custom board.