CCS/LAUNCHXL-CC1310: SPI 3 Wire Interface with MAX6675

Lakshminarayana

Part Number: LAUNCHXL-CC1310
Other Parts Discussed in Thread: CC1310

Tool/software: Code Composer Studio

Hi,

Are there any example code for SPI 3 Wire(CLK,CS,SO) on LP?

As I can see CC13xx supports only 4 wire SPI. If i would like to use 3-wire SPI Should I short the MISO and MOSI? OR any example code?

Thanks.

over 6 years ago

0 Seong Kim over 6 years ago

TI__Mastermind 47961 points

Lakashminarayana,

Please see this related post --> https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz/f/156/t/803998?CC1312R-Sensor-Controller-3-Wire-SPI

BR,

Seong

0 Lakshminarayana over 6 years ago in reply to Seong Kim

Genius 3790 points

Yes, I have looked into it.

I tried shorting MOSI and MISO but it didn't seem to be worked. (SPI Master example).

Thank you.

0 Lakshminarayana over 6 years ago in reply to Seong Kim

Genius 3790 points

Any updates on this?

0 Seong Kim over 6 years ago in reply to Lakshminarayana

TI__Mastermind 47961 points

Lakshminarayana,

The previously linked thread mentions that a bit-banged SPI solution can be implemented with the CC1310 Sensor Controller. Try using the SPI example code in Sensor Controller Studio.

"If you go with the bit-banged version and you are not able to make it work with the available API set, you can step it down a but further to actual assembly code that you can run on the SC (you can basically implement your own functions/APIs for the sensor controller)."

BR,

Seong

Code Composer Studio™︎

Code Composer Studio forum

CCS/LAUNCHXL-CC1310: SPI 3 Wire Interface with MAX6675