TMS320F28069: SPI master receive

Sahan Wijethunga

Part Number: TMS320F28069

I'm trying to send data between TMS320F28069 and Arduino Uno board using SPI protocol. I'm pretty new to SPI communication and TMS320F28069.

TMS320F28069 is the master device and arduino uno is the slave device. I can send data from master to the slave, but I could not get data from the slave Device.

I'm trying to receive data without using "Interupts".

Thanks.

over 6 years ago

0 Manoj Santha Mohan over 6 years ago

TI__Guru 55700 points

Sahan,

Based on your question, it looks like F28069 SPI (master) is sending data to arduino. Did you check whether Arduino SPI slave is indeed receiving the SPI data from the master? Also, does Arduino SPI already have some data in SPI transmit buffer? Unless Arduino SPI has data to transmitted you will not receive anything in F28069 SPI receive register.

So, I believe the problem should be in your hardware connection (or) Arudino SPI not configured correctly.

Regards,

Manoj

0 Sahan Wijethunga over 6 years ago in reply to Manoj Santha Mohan

Prodigy 30 points

Manoj,

Arduino SPI does receive the data correctly. Problem is getting data from the slave to the master.

Regards,

Sahan

0 Manoj Santha Mohan over 6 years ago in reply to Sahan Wijethunga

TI__Guru 55700 points

Sahan,

Okay, did you check whether Arduino slave is transmitting some data back to SPI Master?

Regards,

Manoj

0 Sahan Wijethunga over 6 years ago in reply to Manoj Santha Mohan

Prodigy 30 points

Manoj,

Yes I checked for that too. That's where the problem is. Slave does not send any data all.

Thanks.

Regards,

Sahan

0 Manoj Santha Mohan over 6 years ago in reply to Sahan Wijethunga

TI__Guru 55700 points

Sahan,

Arduino slave SPI should have Transmit data already available in the SPI transmit buffer. The problem is you Arudiono SPI configuration and not with F28069 SPI.

Regards,

Manoj

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TMS320F28069: SPI master receive