nRF51422 ANT dfu experimental bootloader

[Max]

Hi I'm using the PCA10003 dev board to try it out the OTA firmware update.

What i did is exactly that:

• Modify the bootloader example for S310 softdevice and 10003 board with: "ANT_STACK_SUPPORT_REQD __HEAP_SIZE=0 BOARD_PCA10003 S310 SWI_DISABLE0 NRF51 SOFTDEVICE_PRESENT" in the defines and also the include path for the S310 headers.

• Changed the memory layout to: IROM1 start 0x3B800 size 0x4800 IRAM1 start 0x20002400 size 0x1C00

Compiling works well, after that i reset the entire nfr51422 with nRFGO Studio, program the softdevice, in my case S310 v3.0.0, program the compiled bootloader, everything runs smooth.

At this point I'm using the "OTA Updater" v1.4 from ant, it can recognize well the device and it uploads without problems the application hex, but once i do this the application never starts, also after a reset, and i cant access the nrf no more from the OTA Updater...

I'm working with the 10.0.0 sdk

Any ideas? Thanks Max

[Max]

I'm sorry,

I did not configured well the target firmware code, now it works.

Thanks Max

[Petter Myhre]

Great! Thank you for answering.

[Max]

I only got a problem right now, do i need to to press button1 and reset to enter bootloader or there's another way? After uploaded the ota tester application i can't run the bootloader without the buttons combination... my final product will be not accessible for that. Thanks

[Max]

With ANTware II i can start the bootloader, can't understand why the OTA updater 1.4 can't...

[Petter Myhre]

You mean that your final product does not have buttons? Then you need buttonless DFU.

One method is described in question C here.

Does the user have access to the battery on the final product? Then you could maybe have the bootloader running for a certain time every time the battery is inserted, then jump to the application. You can do this by checking the NRF_POWER->RESETREAS register (sd_power_reset_reason_get()). On battery insert all flags should be 0. On a soft reset the SREQ flag should be set.

[Max]

Unfortunatelly also the battery is built-in and fixed. I saw question C and seems to work, on the other side, is it enough to call restart_in_bootloader() like the OTA Tester application does? In that case i can send a payload with custom commands that can trigger that function and restart the device in bootloader mode. Thanks Max