TMS320F28335: 28335 SPI communication with Absolute encoder with BISS-C

Hi W WL,

SPI is a full-duplex communication peripheral, meaning that during SPI communication, the data is simultaneously transmitted (shifted out serially onto the MOSI bus) and received (the data on the bus (MISO) is sampled or read in). If you are looking for some more details/help in understanding this about the SPI module and how to implement it for this, here are a few resources that would be helpful to consult first:

• SPI C2000 Academy page
• SPI Overview Video
• SPI Keystone Architecture guide
• The F2833x TRM section 9.3 SPI Operation
• C2000Ware SPI examples located at {your C2000Ware}\device_support\f2833x\examples\{example_name}

If you are only trying to receive data from a peripheral device, you would still have to transmit dummy data (e.g. zeros) from the controller to the peripheral in order to receive data from the peripheral. But please take a look at these resources I listed above and let me know if you have further questions on implementing SPI for your application!

Best Regards,

Allison