Good Day. I have a customer who is working with LAUNCHXL-CC2640R2. Please see below his query for your reference. Thank you very much.
When using the SPI Master example with the LaunchXL I am unable to send a message shorter then 9 bytes. When I do I see no errors or exceptions, but no activity on the MOSI pin either. The CLK and CS pins work as expected, but not the MOSI pin.
This was tested by altering the MASTER_MSG to an 8 character message and set the SPI_MSG_LENGTH to 8 and observed the results. When those values are set to default they work fine.
This is observable in this isolated example, and I'm seeing similar behavior when testing with the custom hardware and software I plan to deploy soon. It's based on the BLE observer example, and notably it stops at 14 bytes instead of 9.
Is this a known issue? If there are any changes I need to make or anything I need to check, let me know.