ANT Forum

I am using the N548M8CB on a custom pcb with my own application (basically a modified version of one of Nordic's example application). The application works as expected on the Nordic nRF51DK, but when I program the N548M8CB Module (both the Soft device and the App) the N548M8CB does not appear to work at all... in other words I see no BLE advertisement, etc.

I went through Dynastream's documentation and I cannot see any real differences from a hardware perspective and so I am stumped at why it is not working. Does anyone have any idea as to what I am doing wrong?

Thanks in advance!

Cheers,

Sam      

Section 2.3 and 2.4 of the module datasheet talks about re-programming. Please make sure you don't miss anything.

Thomas      

Good day Thomas,
Indeed, I read those sections several times. I am using the SWD interface and so I performed the "Erase all" within the nRFgo application and then programmed the softdevice (S110) and then the application. Each programmed fine and I performed a verify which was successful. Would I have to make any changes to the Nordic example source to make it work on the N548? I am assuming not, but perhaps this is a wrong assumption.
Thank you once again for your assistance!
Cheers,
Sam      

Good day Thomas,

I found out my issue...The issue is that the nRF51DK's uses a nRF51422-CFAC part which has 32K of RAM whereas the N548 uses the nRF51422-CEAA part which only has 16K of RAM. As a consequence I had to change the linker file to reflect the lower RAM size and once I did that the N548 works as expected.

My apologies for bothering you with something I should have known!

Cheers,

Sam      

Hi Sam,

No need to apologize. I should have thought of this and remind you.

I guess you know that we do have N5150 module which uses nRF51422-CFAC with 32K RAM and is pin compatible with N548. N548 is already end of life and is replaced by N550.

Regards,
Thomas      

Good day Thomas,

Thank you for your understanding!

Indeed, I know the N548 is EOL... I had already bought a few of N548's last Fall and so I just wanted to confirm operation of my prototypes. For production the N550's will be the way we will be going. Although in one way I am kind of glad I got "bit" by this, as this forced me to double check a bunch of my work and my tools.

Thanks again for your prompt responses!

Cheers,

Sam