Does DFU HCI(serial) requires an ack from bootloader?

[irarykim]

Hello, I'm stuck in DFU using HCI(serial)..

I'm using nrf51822, softdevice s110 ver 6.0.0. I used example code in "nrf51_sdk_v6_0_0_43681\nrf51822\Board\nrf6310\device_firmware_updates\bootloader", and using nRFgo Studio --> nRF51 Bootloader to try to download my fw through COM port.

But I got "Progress: 0 Ack out of sequence, or no ack returned" message.

I found my bootloader can detect a correct 16-byte "start packet". (devzone.nordicsemi.com/.../a00028.html)

But I cannot find any code for sending an ack for this start packet.

Can any one tell me what I should do?

Thanks!

[irarykim]

The answer is YES. ack_transmit() is called if receives a start packet. My module returns an ack, then receives data packets. But doesn't send back ack... nRF6310 + PCA10005 works fine for HCI DFU~ I should compare them and find why.

[DonWoo]

irarykim

hi,I'm having the same problem.Have you found out why the ack is missing?Thanks.