topic Re: GSM Module Sim900A with MCXN947 in MCX Microcontrollers

GSM Module Sim900A with MCXN947

mays — Mon, 13 Jan 2025 15:29:17 GMT

Hello,

I am currently working on a project involving a GSM module (Sim900A) connected to an MCXN947 microcontroller.

Could you advise me on whether to use receiving data with or without a ring buffer? Additionally, what are the benefits of using a ring buffer?

Could you provide me a brief example or guidance on how to set up it (UART communication with the GSM module)?

Thank you.

Re: GSM Module Sim900A with MCXN947

Pavel_Hernandez — Mon, 13 Jan 2025 17:10:06 GMT

Hello, my name is Pavel, and I will be supporting your case, but some questions are beyond the scope of this support channel.

I recommend review the example on the SDK from that MCU, here is the link where you cand find this.

Select Board | MCUXpresso SDK Builder

and here is the IDE.

Select Board | MCUXpresso SDK Builder

And about if you need or not use the ring-buffer depends on your application, if this has a data flow on a high frequency.

Best regards,
Pavel

Re: GSM Module Sim900A with MCXN947

mays — Tue, 21 Jan 2025 09:26:23 GMT

Thank you for your reply,

Could you please specify the value of this high frequency?

Re: GSM Module Sim900A with MCXN947

EdwinHz — Fri, 24 Jan 2025 22:18:38 GMT

Hi @mays,

It's not a specific frequency where the ring buffer starts being useful. It is rather a relation between the frequency that the UART module clock is operating at, and the frequency that the data is incoming at.

See: https://stackoverflow.com/a/3092143

BR,
Edwin.