nRFgo Studio and bootloader programming

RE: nRFgo Studio and bootloader programming

Jeong Hyun Seok — Mon, 30 May 2016 02:24:54 GMT

hello Bjørn Spockeli,

As I tried "= {BANK_VALID_APP};" 0x3FC00 address shows strangely,

RE: nRFgo Studio and bootloader programming

Jeong Hyun Seok — Thu, 26 May 2016 08:30:30 GMT

hello Bjørn Spockeli,

As I tried "= {BANK_VALID_APP};" 0x3FC00 address shows strangely,

but as I use const uint8_t instead of uint8_t, It works well. could you explain this?

RE: nRFgo Studio and bootloader programming

Paolo A. — Tue, 15 Dec 2015 15:33:15 GMT

Hi Bjorn, thank you for your hint.

RE: nRFgo Studio and bootloader programming

bjorn-spockeli — Mon, 14 Dec 2015 08:18:43 GMT

Yes, that is correct.

RE: nRFgo Studio and bootloader programming

Paolo A. — Fri, 11 Dec 2015 15:57:36 GMT

Hi Bjorn, thank you for reply. So, if I understand well, via smartphone the DFU app, after download sets the BANK_VALID_APP = 0x01. But if I try to program the device with nRFgo Studio this flag doesn't set. Is it right? So I must forced this flag manually.

Paolo A.

RE: nRFgo Studio and bootloader programming

bjorn-spockeli — Fri, 11 Dec 2015 15:06:17 GMT

The device will always start in bootloader mode and check if there is a valid application on the device. This is done by reading the bootloader settings flash page and checking if a certain flag is set.

The flag is by default set to BANK_INVALID_APP = 0xFF, indicating that there is no application present on the device. The flag will be set to BANK_VALID_APP = 0x01 after an OTA DFU has been successfully completed.

The flag can be set manually in bootloader_settings.c by changing line 18, i.e.

uint8_t  m_boot_settings[CODE_PAGE_SIZE] __attribute__((at(BOOTLOADER_SETTINGS_ADDRESS))) __attribute__((used));

to the following

uint8_t  m_boot_settings[CODE_PAGE_SIZE] __attribute__((at(BOOTLOADER_SETTINGS_ADDRESS))) __attribute__((used))= {BANK_VALID_APP};

For more information, please see question E in our DFU FAQ

RE: nRFgo Studio and bootloader programming

Paolo A. — Fri, 11 Dec 2015 14:53:59 GMT

Hi Anders, if I programmed the softdevice after the bootloader, the softdevice erase all flash memory.

RE: nRFgo Studio and bootloader programming

Anders Strand — Fri, 11 Dec 2015 14:48:34 GMT

Try programming it in this sequence:

Bootloader
Softdevice
Application