Compiler/MSP432P401R: How do I write data into SPI registers?

Hello user6318750,

I will assume you are not using an RTOS.

There are example projects in the simpleLink_msp432p4_sdk_3_40_01_02 (this is latest version)  that show to setup and write to the SPI.

If you look in C:\ti\simplelink_msp432p4_sdk_3_40_01_02\examples\nortos\MSP_EXP432P401R\driverlib

Which register are you talking about, on the MSP432 or your external device?

Hello user6318750,

Were you able to get your SPI working?

Hello user6318750,

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The register that i wanna talk which is RX and TX on MSP432.

When i use wire to connect SPI between 2  MSP432 that works okay. (wired connection)

But when i used lora with antenna to connected between 2 MSP432 that it did not worked  (wireless conection)

he register that i wanna talk which is RX and TX on MSP432.

When i use wire to connect SPI between 2  MSP432 that works okay. (wired connection)

But when i used lora with antenna to connected between 2 MSP432 that it did not worked  (wireless conection)

I think you need to put a scope on both ends to see just what is happening to your communication, and where you are dropping bits.

Yeah my Spi was working, when i connected between two kit MSP432 by wire which was working very well. But when i try to connect wireless connection by lora antenna which was not working. I don't know what happened with my protocol.

If you're trying to write registers in your LoRa chip, you need to look at the data sheet for the chip you're using. They're usually pretty good about describing the sequence required.

It usually looks something like (Register number+R/W bit) followed by data (one direction or the other). Beyond that, the chips are all different.

Setting up e.g. a Semtech LoRa device is fairly complex. Google pointed me at a few libraries on Github.