RTOS/AWR1443BOOST: SPI partially deasserts during SPI_transfer driver

Hello Alex,

Can you provide a snippet of your schematic for the SPI connection? What FRAM are you interfacing with?

Regards,

Adrian

We're using the AWR1443Boost board and jumpers - using the 20 pin headers as described on page 10 of swru507a

The FRAM we're using is:
www.adafruit.com/.../1897 with connection tutorial:
cdn-learn.adafruit.com/.../adafruit-spi-fram-breakout.pdf

Long story short: we can easily connect and access the FRAM data using the arduino drivers found on github:
github.com/.../Adafruit_FRAM_SPI.cpp

but when I try to the use TI drivers as I would expect, the FRAM is completely silent on the oscope.

I ended up creating a GPIO pin which I would toggle corresponding to typical SPI operation, but nothing seemed to help. I've started pulling in CSV logs from the Oscope to see if there's a timing issue in the driver itself.

Hello Alex,

Just to verify, have you correctly configured the pinmux of the AWR1443 for SPI? Do you have the SPI operating in master mode?

Regards,

Adrian

 believe I'm using the correct mux, these pins work with the MSP432 in 3 pin mode:

SOC_XWR14XX_PINR8_PADAD,    SOC_XWR14XX_PINR8_PADAD_SPIA_MOSI

SOC_XWR14XX_PINP5_PADAE,    SOC_XWR14XX_PINP5_PADAE_SPIA_MISO

SOC_XWR14XX_PINR9_PADAF,     SOC_XWR14XX_PINR9_PADAF_SPIA_CLK

SOC_XWR14XX_PINR7_PADAG,    SOC_XWR14XX_PINR7_PADAG_SPIA_CS

SOC_XWR14XX_PINP6_PADAA,    SOC_XWR14XX_PINP6_PADAA_SPI_HOST1_INTR

We're using the TIDEP-0091 as a reference and it appears that the AWR is configured with 3 wire SPI instead of 4 wire, but otherwise both TIDEP-0091 and our implementation are running SPI Master.

I initially tried to upload the oscope results, but the output was broken, I'll try to reupload in a moment

Here is the MOSI and the SCK results from default values