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Accessing the PAN1326B Bluetooth module on the MAX32630fTHR

Alistair

I have dome some experimentation over the long weekend and had some success in getting the MAX32630fTHR working with the Arduino IDE. In fact it is pleasingly fast to compile and upload. I will try and finish documenting this process just in case it is of help to others, or me in the future when I have forgotten everything. ;-)

There is one thing I am struggling with however, and I was wondering it anyone has the solution.

I am trying to communicate with the PAN1326B to scan for Bluetooth devices. It should be on UART0, and having dug deep in to the Arduino core for the module it looks like that is mapped correctly. However when I send data (a HCI reset of 01,03,0c,00 for example) to it nothing happens and nothing ever comes back.

I have pulsed down P1.6 (BT_RST) for a few hundred milliseconds to try and reset things and nothing changes. I have held CTS low, but also checked it high just in case.

One complication is the PAN1326B required a 32KHz signal, but this is a feature built in to the MAX32630 in P1.7. If I do not activate this then RTS remains high as expected.

When I set the PWR_PSEQ_32K_EN flag in PWRSEQ_REG4 to activate the 32KHz output RTS from the module is briefly high, but then goes low in a fraction of a second. I believe this is as expected.

Now one odd thing is if I leave the module running it will eventually do high. This is not quick though and may be some kind of power saving feature perhaps?

I am blindly assuming that the clock is being generated and being passed thought correctly, but there is a test pad TP4 so I can confirm this tomorrow. Everything else is not exposed on the board unfortunately.

So, has anyone got any thoughts on why I am not able to communicate with the module, or advice of what to try next?

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  • I have not received the board, so i am not a stage where i can give you a tested solution, but when i was reading the user guide during the application stage i had seen that the TI's CC2564 Chip inside this module requires an init script to be sent after reset. https://pideu.panasonic.de/development-hub/pan1326/evaluation_board/user_guide/ . Do let me know, I am starting to think using this module will be quite hard.  Also I am planning to use Maxim's LPSDK which seem to have the necessary BLE Stack and it takes care of the init script by itself. Again I have only setup the SDK and configured make file to compile a blinky code. But never put it on the board.

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  • I have not received the board, so i am not a stage where i can give you a tested solution, but when i was reading the user guide during the application stage i had seen that the TI's CC2564 Chip inside this module requires an init script to be sent after reset. https://pideu.panasonic.de/development-hub/pan1326/evaluation_board/user_guide/ . Do let me know, I am starting to think using this module will be quite hard.  Also I am planning to use Maxim's LPSDK which seem to have the necessary BLE Stack and it takes care of the init script by itself. Again I have only setup the SDK and configured make file to compile a blinky code. But never put it on the board.

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  • in reply to arvindsa

    I believe you are correct that the chip needs resetting / initialising, but I don’t believe that command is making it to the module, and if it is I am not getting any response from it. I am going to be able to check that I have the controller flags set correctly to feed the 32KHz required, and I think that is working, but if it is then it is the UART related flags I need to turn my attention towards. The Arduino core does do some of the initialisation, but there is perhaps some more that needs doing first. If no one else knows then I will have to keep working the problem.

    Truth is mbed will do everything I need, but that is being deprecated. I can at least learn from that when porting to Arduino. My intention to use Arduino is because I want to keep things easy in the future and accessible, even if I need to do more work now to achieve that. It appears much of the SDK is available through the Arduino core so everything should be possible. For what I and doing I do not need a full Bluetooth stack and I have encapsulated other modules in the same way in the past, some hope that will be enough. I will say that for everything other than Bluetooth I have found the Arduino core more than adequate. If you get stuck then perhaps give it a look.