Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

03/10/2017

JK 05:34 PM Software Development: RE: SPI Comm - can transmit data from Linux, but not receive

Hello Mike,
We've since conducted a loopback test (MOSI connected to MISO within the FPGA) and observed no change in behavior (still an empty receive buffer). The SCLK and CS lines are still behaving as expected as measured by an osci... Jared Kirschner

03/09/2017

JK 08:28 PM Software Development: RE: SPI Comm - can transmit data from Linux, but not receive

Are you referring to modifying the FPGA such that MOSI is connected to MISO?
If that works, it might indicate that somehow our MISO signal isn't hooked up correctly in the FPGA (which I'd be surprised by due to another test described ... Jared Kirschner

MW 06:43 PM Software Development: RE: SPI Comm - can transmit data from Linux, but not receive

Have you tried using the Loopback option to see if you can just loop back the command data and if RX is OK?
-Mike
Michael Williamson

03/01/2017

JK 06:16 PM Software Development: SPI Comm - can transmit data from Linux, but not receive

Context:
- Hardware: MitySOM 5CSX board connected to another board containing several chips which communicate via SPI
- Software: the MitySOM processor is running the Altera Linux 4.1.22 LTSI RT kernel with a device tree I've customize... Jared Kirschner

02/22/2017

MR 10:27 PM PCB Development: Standoff on Mounting Hole Locations page

I believe there is a small errata on the [[Mounting_Hole_Locations]] page.
At the bottom it states... "Standoff: McMaster Carr PN - 91115A510" ... This is not an actual part number in McMaster.
I think the last two numbers where switch... Michael Ruen