How do I program / Flash blinky_pca10040 to a custom board

[Renix]

I compile blinky_pca10040 I use IAR EWARM - ARM Cortex compiler I have a Rigado BMD-300 on my PCB Use J-LINK EDU When I try to download and debug, I get the error "Failed to get CPU status after 4 retries"

Any help appreciated

[Petter Myhre]

I haven't used the BMD-300 module myself, but it seems it comes with read-back protection enabled. See this and this. Maybe that is causing the issue? Have you installed the latest nRF5x toolset? Can you try to use nrfjprog, and see if you get contact with the chip? Have you used IAR and the J-Link EDU with other chips?