Chain JTAG, mutli-mcu programming with nrf52?

[SRA]

I'm just checking because search didn't have hits.

Has anyone used JTAG "chain" programming to flash two micros on the same circuit? I assume the nrf52s won't hold this up, but I'm not sure.

Anyone?

[Nguyen Hoan Hoang]

nRF52 uses SWD. It does not support jtag chains. SWD is peer to peer, no chaining. However there is a solution to parallel programming nRF52 using multiple low cost programmer here.

[Nguyen Hoan Hoang]

I am sorry to disappoint you but $4 is only the MCU. There are a lot more components to that. Overall costs is over 10x that and I am not using some body else code. I write my own. It took 2 years to complete the project and the software is still on updating every time Nordic changes its SOC. To tell you the trust, my investment into the project hasn't paid off yet. All that is because I don't steal other people work and sale knockoff of it. An other thing, a legal USB Vend/Prod ID will cost you $5K. The IDAP is sold with a legal USB ID.

BTW SWCLK cannot be shared.