Proper memory settings for S340 SoftDevice Bike Power TX Example?

[drewvigne]

Currently working on flashing the bike power tx example to my Arduino Nano 33 which uses a NINA-B306 nRF52840. The device is wiped clean with only the s340 softdevice loaded. No bootloader is present. I have defined a custom board definition with nrf_gpio and have successfully flashed some other non-softdevice examples like Blinky. I believe my custom board definition is good, but I'm not fully confident.

When I flash the bike power tx example I start off by erasing the device. Then I flash the s340 softdevice. Finally I flash the bike power tx application via SES.

My Garmin 500 Edge does not receive any ANT+ data, so something is broken. Also two of my board LEDs are stuck in the on position. It could be my board definition, but it could also be my linker_section_placement_macros which are as follows:

FLASH_PH_START=0x0;
FLASH_PH_SIZE=0x80000;
RAM_PH_START=0x20000000;
RAM_PH_SIZE=0x10000;
FLASH_START=0x31000;
FLASH_SIZE=0x6e000;
RAM_START=0x20002000;
RAM_SIZE=0xf480"

I have read the guidelines on memory adjustments but I am still sort of lost. For example, if FLASH_SIZE > FLASH_PH_SIZE - FLASH_START, which one do I adjust? Also, what does the PH even stand for? I cannot find documentation on this unfortunately.

[Kenneth]

I hope you have two nRF52-DK that you can use for comparison here.

Make sure to follow the description in main.c, for instance: "Make sure that @ref ANT_LICENSE_KEY in @c nrf_sdm.h is uncommented."

Also check out:
https://devzone.nordicsemi.com/f/nordic-q-a/62669/ant-examples-not-working-on-nrf52840/255445

[drewvigne]

I am waiting on the dev kits in the mail; hopefully when I get them I can speed up development.

The license key is uncommented and ant network keys are added to the key manager. All softdevice headers are in the correct directory.

I believe the issue is most likely the memory settings or the board definition. The memory adjustment guidelines do not make it clear which parameter to adjust. If we consider the example where FLASH_SIZE > FLASH_PH_SIZE - FLASH_START, which one should be adjusted to make FLASH_SIZE < FLASH_PH_SIZE - FLASH_START true?

[Kenneth]

Not sure if I quite understand, you can find two examples in the nRF5 SDK that are using S340 (ant_shared_channel\m2m and ant_message_types\master), you should be able to just copy those?

Kenneth

[drewvigne]

Hi Kenneth. It could be that I would simply have to copy the S340 settings from a PCA10056 example. But I thought that the FLASH_SIZE and RAM_SIZE were dependent on the application. Are they not? 

Thanks

[Kenneth]

Flash size if fixed for a specific softdevice release, but the required RAM by the softdevice will depend on the run-time configuration (number of active channels supported). Typically when you enable the softdevice run-time you will get an error stating that the configured RAM is wrong, and which value the RAM should change to.

Best regards,
Kenneth