STM32L4 SPI Clock phase

[Ghada Dhibi]

Posted on July 26, 2017 at 17:30

Hi All, 

I'm using STM32L486RG microcontroler and 2 sensors using the same SPI interface (SPI1) 

I'm asking how to configure the SPI1 to communicate with 2 sensors when : 

• first sensor is working with SPI_PHASE_1EDGE 
• sencond sensor is working with SPI_PHASE_2EDGE

Is it possible to communicate with both of them using the same SPI configuration ? 

Thanks a lot. 

Ghada

#spi #stm32l4-spi #spi-clkphase #stm32l4

[waclawek.jan]

Posted on July 26, 2017 at 18:16

No.

To change from one sensor to the other, you need to disable SPI by clearing SPI_CR1.SPE, change CPOL/CPHA configuration, and then reenable SPI_CR1.SPE.

JW