2021-01-05 11:03 PM
I'm researching various ways to generate serial bit streams clocked by an external source.
I'm wondering if OCTOSPI device working in simpler modes (e.g., SPI, Dual-SPI and QuadSPI) can do this.
Any info is appreciated.
Thanks in advance.
2021-01-06 03:13 AM
Hi @Yoichi Shinoda
The OCTOSPI is taking the Master role.
But maybe I would be more helpful if you provide us the exact protocol that you intend to use:
Bouraoui
2021-01-06 08:20 AM
It is a pair of raw bit streams, and they are write only.
So far, I have successful results with DMA port bit-banging, a pair of SPI devices with DMA in slave mode with common external clock using DMA, but seeking other possibilities.
2021-01-07 06:34 AM
HI @Yoichi Shinoda
In your use case, I can suggest you to use PSSI interface. For more details about PSSI you can refer to section 37 of the reference manual RM0468 "STM32H723/733, STM32H725/735 and STM32H730 Value line advanced Arm®-based 32-bit MCUs"
Bouraoui