IWR1443BOOST: About SPI Clock Frequency

user244678

Part Number: IWR1443BOOST
Other Parts Discussed in Thread: TIDEP-0091, MMWAVE-SDK

I am trying to change the SPI clock frequency with the Demo Firmware of TIDEP-0091.
In order to lower the SPI clock frequency to 500KHz and 100KHz, the value of #define SPI_BITRATE in main.c was changed.

#define SPI_BITRATE 500000-> 1.4MHz
#define SPI_BITRATE 100000-> 960KHz

Could you tell me how to achieve 500KHz and 100KHz?

Best Regards,
Hiroyuki Taguchi

over 5 years ago

0 Akash Gondalia over 5 years ago

TI__Guru 50240 points

Hi Hiroyuki,

Please refer to the Doxygen for the SPI driver as part of the mmWave-SDK 2.1. You can find this document at the following location:

C:/ti/mmwave_sdk_02_01_00_04/packages/ti/drivers/spi/docs/doxygen/html/index.html

Cheers,

Akash

0 user244678 over 5 years ago in reply to Akash Gondalia

Expert 1365 points

Hi Akash,

Thank you for your reply.
Seeing the Doxygen for the SPI driver and section 23.3 of TRM swru522d.pdf, I solved this problem by setting a prescale value in the EXTENDED_PRESCALE1 Register.

Regards,
Hiroyuki Taguchi

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IWR1443BOOST: About SPI Clock Frequency