How to merge serial and BLE DFU without flow control?

RE: How to merge serial and BLE DFU without flow control?

hdadhich — Tue, 10 Dec 2019 11:28:16 GMT

Thanks for the response, I'll open a new question.

RE: How to merge serial and BLE DFU without flow control?

bjorn-spockeli — Tue, 10 Dec 2019 10:35:36 GMT

Hi hdadhich,

can you please open a new question and then refer to this 2 year old question in your new question?

Best regards

Bjørn

RE: How to merge serial and BLE DFU without flow control?

hdadhich — Tue, 10 Dec 2019 10:24:13 GMT

Hi bjarn-spockeli, Can you please elaborate more on this?

I'm facing similar problem and saw that BLE_STACK_SUPPORT_REQD is set in Makefile.

I assume with this both BLE and Serial will use sd_ -API yet I'm facing similar problem.

I tried by disabling HWFC and setting baud rate to 9600 still no luck.

Thanks.

RE: How to merge serial and BLE DFU without flow control?

bjorn-spockeli — Thu, 22 Feb 2018 08:44:26 GMT

We have seen some issues with the nRF52 DK when using the serial bootloader without HWFC at higher baudrates than 9600. This is most likely due to the Segger J-Link OB interface MCU as the TX/RX lines are passed to the interface MCU which then forwards it on the CDC UART port. If you connect directly to the TX/RX pins of the nRF52832 using the pin headers and use a FTDI adapter to connect it to your computer, then you should be able to use higher baudrates.

RE: How to merge serial and BLE DFU without flow control?

danni — Thu, 22 Feb 2018 08:11:01 GMT

Hi, bjorn-spockeli, I use nRF52 DK do my test. when I disabled HWFC and config baud rate to 9600, it can success. but I can't increase baud rate to 115200 or higher.

RE: How to merge serial and BLE DFU without flow control?

bjorn-spockeli — Wed, 21 Feb 2018 14:10:49 GMT

Are you using a nRF52 DK or is it a custom board?

RE: How to merge serial and BLE DFU without flow control?

danni — Fri, 09 Feb 2018 01:49:48 GMT

Hi, bjorn-spockeli, when I disabled HWFC and config baud rate to 9600, UART DFU can success. but when I used HWFC and config baud rate to 115200. UART DFU always failure. Could you help me analyzes why it always failure?

thank you very much.

RE: How to merge serial and BLE DFU without flow control?

danni — Fri, 09 Feb 2018 01:38:30 GMT

Hi, Jason, when I disabled HWFC and config baud rate to 9600, it can success. I wonder how you increase baud rate to 115200 or higher?

thank you very much.

RE: How to merge serial and BLE DFU without flow control?

bjorn-spockeli — Thu, 08 Feb 2018 09:35:44 GMT

Yes, the serial bootloader is designed to be used without the SoftDevice, i.e. it uses the __WFE() instruction directly to enter sleep mode and uses the NVMC directly as opposed to using the sd_ - API. One easy solution could be to enable the SD regardless if you use the serial or BLE transport layer and then only use the sd_-API.

RE: How to merge serial and BLE DFU without flow control?

danni — Thu, 08 Feb 2018 02:58:38 GMT

hi,bjorn,

In sdk14.1.0, bootloader_secure_ble demo, when I add nrf_serial_dfu.c as Jason said above, however ,BLE DFU can success, UART DFU can't.(I have flow control and baud rate 115200 )

In order to find the error, In bootloader_secure_serial demo,when I only add BLE_STACK_SUPPORT_REQD into bootloader_secure_serial demo, then UART DFU demo can't work, I found they have different event wait function:

when we enable BLE_STACK_SUPPORT_REQD in bootloader_secure_serial demo , there also have some differences in function nrf_dfu_flash_init(); I don't know if these differences cause UART DFU failure.

thanks

RE: How to merge serial and BLE DFU without flow control?

bjorn-spockeli — Wed, 07 Feb 2018 12:29:30 GMT

danni: Could you elaborate on what specifically goes wrong/doesnt work?

RE: How to merge serial and BLE DFU without flow control?

danni — Sat, 03 Feb 2018 05:33:47 GMT

Hi Jason, could you tell me which SDK do you used? In sdk13.0.0, I do as what you said, but UART DFU never success. thanks

RE: How to merge serial and BLE DFU without flow control?

bjorn-spockeli — Thu, 20 Jul 2017 11:55:45 GMT

Hi Jason, I sincerly apologise for the late reply. Have you made any progress regarding this issue? The Serial bootloader was designed to use flow control and we have therefore not done a lot of testing with higher baudrates. I agree that you should be able to automate the UART reception of the FW with DMA and PPI.