Nucleo-144 SPI?

[Dick Lin]

Posted on June 07, 2018 at 17:49

Hi,

I am using STM32L496 Nucleo-144 connecting SPI1 to external Adafruit MAX31865 PT100 temp sensor using breadboard with Saleae.

For some reason (I have no clue at all), I got nothing from Saleae.

One thing I kinda of curious is the the pinout. From UM1279 User manual, the pinout are

- SPI_SCK PA5

- SPI1_MISO PA6

- SPI1_MOSI PA7

- SPI1_CS PD14

While from Cube the SPI1_NSS is PA4. 

I am assuming SPI1_CS and SPI1_NSS are the same (either Chip Select or Slave Select). Just not sure which one should I follow. I did try both, no luck at all.

Why I am not seeing anything from Saleae? I would think should be a very straight forward thing.

Thanks,

Dick

[Dick Lin]

Posted on June 11, 2018 at 22:37

Yeah, making simeple GPIO will be able to control the SS.

Also if NSSPMode set DISABLE, seems the CS high will go away but after

transaction, it keep low all the time. Might be somewhere can control it.

hspi1.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;

On Mon, Jun 11, 2018 at 12:22 PM, David Littell <