IWR6843: Simultaneously output from two ports, SPIA and SPIB

user244678

Part Number: IWR6843

I want to output ADC Data by SPI with IWR6843.
LVDS is not available due to our customer requirements.
Is it possible to simultaneously output from two ports, SPIA and SPIB, to shorten the ADC Data transmission time?
IWR6843 is the SPI Master.

According to the SPI driver doxygen, SPI_transfer() will block code execution until the transfer is complete, so I believe that two-port simultaneous transfers are not possible.

SPI driver doxygen:
SPI transfer mode determines the whether the SPI controller operates synchronously or asynchronously.In SPI_MODE_BLOCKING mode SPI_transfer() blocks code execution until the SPI transaction has completed.Only SPI_MODE_BLOCKING is supported.

Best Regards,
Hiroyuki Taguchi

over 5 years ago

0 Yogesh Siraswar over 5 years ago

TI__Mastermind 20755 points

Hello Hiroyuki Taguchi,

Before I can answer your questions, could you please provide some information:

1) Are you using multi-buffer mode( enabling SPI_MULT_ICOUNT_SUPPORT).

2) Could you please provide information on SPI slave that your are connecting and the interface.

Thanks

Yogesh

0 user244678 over 5 years ago in reply to Yogesh Siraswar

Expert 1365 points

Hi Yogesh,

Thank you for your reply.

1) Yes, I use multi-buffer mode.

2) I use RX631 made by Renesas Electronics RX631.
www.renesas.com/.../rx63n-631.html
IWR6843 = SPI master
RX631 = SPI slave
Bitrate = 6.25Mbps

Regards,
Hiroyuki

0 Yogesh Siraswar over 5 years ago in reply to user244678

TI__Mastermind 20755 points

Hello Hiroyuki,

Yes, the SPI driver supports only blocking mode. So you cannot have two simultaneous SPI transfer.

Is it possible for you to increase the bit-rate.

Thanks

Yogesh

Sensors

Sensors forum

IWR6843: Simultaneously output from two ports, SPIA and SPIB