Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

08/03/2017

07:25 PM Software Development: RE: Using EEPROM available on MitySOM-5CSX

We are using kernel version 4.1.22
-Nick Nicholas Herbert

07:22 PM Software Development: RE: Using EEPROM available on MitySOM-5CSX

What version of the kernel are you using? From our site? Version 3.16?
-Mike
Michael Williamson

06:58 PM Software Development: RE: Using EEPROM available on MitySOM-5CSX

Mike,
I recently picked up this task and haven't been able to see the NOR flash device in the MTD devices list. On... Nicholas Herbert

07/20/2017

06:09 PM Software Development: RE: I2C Slave Communication Hanging

So I didn't respond right away as you are using verilog and I am more of a VHDL guy, but there is an open drain primi... Michael Williamson

05:43 PM Software Development: RE: I2C Slave Communication Hanging

We appear to have finally discovered the root cause of our issue. We actually had a self-inflicted bug where the SCL ... Jay Petrie

07/19/2017

07:39 PM Software Development: RE: I2C Slave Communication Hanging

Dan,
I've attached 2 scope shots between the Aardvark as master and the ST1633 as slave:
1. A single byte write w... Jared Kirschner

03:42 PM Software Development: RE: I2C Slave Communication Hanging

Dan,
We'll be conducting investigations this afternoon with both the Linux I2C kernel driver and a bit-bang I2C us... Jared Kirschner

03:45 AM Software Development: RE: I2C Slave Communication Hanging

Jared,
To me it looks like the scope capture you've shown should be correct and as you've said there shouldn't be ... Daniel Vincelette

07/18/2017

07:56 PM Software Development: RE: I2C Slave Communication Hanging

Some additional context / correction:
I2C2 and I2C3 are both configured the same way. If you replace "3" with "2" ... Jared Kirschner

07:33 PM Software Development: RE: I2C Slave Communication Hanging

All,
This is the open drain primitive we are using for the I2C interfaces:
wire w_i2c3_scl_oe, w_i2c3_scl, w_... Clyde Shappee

05:09 PM Software Development: RE: I2C Slave Communication Hanging

Are you using the open drain primitive in the top level of the FPGA project?
-Mike
Michael Williamson

05:00 PM Software Development: RE: I2C Slave Communication Hanging

I've attached the driver source/header. I'm waiting to hear from the touch controller vendor whether I can share the ... Jared Kirschner

04:50 PM Software Development: RE: I2C Slave Communication Hanging

We are using I2C2 routed through the FPGA fabric (see image "I2C2_Connector.PNG"). It does have pullups to the best o... Jared Kirschner

04:32 PM Software Development: RE: I2C Slave Communication Hanging

Also, Can you share a snippet of the user space code you are using to issue the read request?
Thanks.
-Mike
Michael Williamson

04:15 PM Software Development: RE: I2C Slave Communication Hanging

Which I2C bus are you using? An HPS peripheral connected directly to HPS pins or routed via FPGA fabric?
This alm... Michael Williamson

02:52 PM Software Development: I2C Slave Communication Hanging

We're experiencing a problem with I2C communications with a slave on address 0x55 on a MitySOM-5CSX, shown in the att... Jared Kirschner