STM32F7 multi-Slave SPI with CubeMX

[David Littell]

Posted on April 21, 2017 at 03:14

CubeMX 4.20.1

STM32Cube_FW_F7_V1.6.1

Target: STM32F765NIHx

The Reference Manual (RM0410 rev 2) Section 35.5.3 (multi-slave) Figure 390 Note 2 states that the MISO pins of all SPI Slaves must be configured as alternate-function open-drain.  However, CubeMX only offers Alternate Function Push Pull as a GPIO mode.  Is this a known problem with CubeMX meaning I'll have to manually patch the generated code?

Thanks,

Dave

#stm32f7-multi-slave-spi

[S.Ma]

Posted on April 21, 2017 at 05:39

My 2 cents: Only push pull for selected slave will yield high datarate, such as 20 mbps. Of course, make sure that multiple slaves are not active simultaneoulsy even for a short while otherwise you might have a stress glitch. My advice is to look with a scope and make sure your fw is not bugged and gpio glitch free.