Go to advanced search

by pzakielarz
Sun Oct 29, 2017 10:12 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI_NO_CS flag in SPI_MODE seems to have no effect.
Replies: 5
Views: 2383

Re: SPI_NO_CS flag in SPI_MODE seems to have no effect.

Well, this might not really help, still, there is always the possibility to access the peripheral directly from userland. Real-time behavior is feasible thru DMA access. If you need other CE/CS signals than the one controlled by the SPI peripheral you still can daisy chain DMA control blocks to acc...
by pzakielarz
Wed Oct 18, 2017 3:47 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI_NO_CS flag in SPI_MODE seems to have no effect.
Replies: 5
Views: 2383

Re: SPI_NO_CS flag in SPI_MODE seems to have no effect.

After studying the source closer, I'm confident that the driver ignores SPI_NO_CS when using gpio chipselect. Anyone have any thoughts as to why this is or isn't a bug?
by pzakielarz
Tue Oct 17, 2017 6:10 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI_NO_CS flag in SPI_MODE seems to have no effect.
Replies: 5
Views: 2383

SPI_NO_CS flag in SPI_MODE seems to have no effect.

I'm not seeing any difference on how the chipselects operate when SPI_NO_CS is set/cleared. My intention is to configure the system to use GPIO chipselects. I need to leave the chipselect de-asserted for some transfers. I'm running Raspbian (March 2017 Jessie) on a Pi 2 Model B V. 1.1. # This is my ...

Go to advanced search