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by sworteu
Mon Jun 03, 2019 3:14 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Please create an issue in the firmware issue tracker with details and a link back to here I can't promise that we'll look at it immediately, but it's less likely to get lost than a report as one of (currently) 1.38million other posts on the forum. Done https://github.com/raspberrypi/firmware/issues...
by sworteu
Mon Jun 03, 2019 3:03 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Odd. There's no real difference in the ports, and nothing like this has been previously reported (including time when the chip was used in other devices). Not sure what to suggest, if anything comes to mind will report back. hi jamesh, please do so. It's very odd and we can't find how this happens....
by sworteu
Mon Jun 03, 2019 2:47 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

So i'm back here to inform everyone of another issue i had. When using DISPLAY_DSI_PORT <0> the screen colors are "inverted" sometimes. It seems the DSI PORT 0 is unstable. Testing on DSI PORT 1 i can't seem to get any issues. The colors seem to be fine always. So having these dt-blob parts (_cm3+ m...
by sworteu
Wed May 08, 2019 4:04 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

We have it working. The device tree is functioning normally when set to display port 0 with i2c port 0 and sda scl on gpio 0 and 1.

We had the i2c hardware traces the wrong way round.

Thanks @6by9 @John Westlake
by sworteu
Fri May 03, 2019 11:26 am
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

John Westlake wrote:
Thu May 02, 2019 1:52 pm
Great you can move forward now - this is always the hardest stage of development when your not sure if your battling a hardware or software issue!
Yes it is, we'll report when it's working so it may be helpfull to others.
by sworteu
Thu May 02, 2019 10:32 am
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Might be a silly question, your not missing I2C pull-up resistors or some such on your PCB are you by anychance? (I'm not sure if the panel has them on its interface PCB or not - but just wondering if you have a hardware issue that's causing you to chase your tail... The i2c ports seems to be conne...
by sworteu
Wed May 01, 2019 2:56 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Your dt-blob.bin isn't being accepted then. ignore_lcd is initialised to -1. If it finds a DISPLAY_SDA value defined via dt-blob.bin then it will be set to 0, otherwise 1. Manually setting it in config.txt overrides that, but doesn't make the configuration valid. i've removed the manual override in...
by sworteu
Wed May 01, 2019 2:28 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Your dt-blob.bin isn't being accepted then. ignore_lcd is initialised to -1. If it finds a DISPLAY_SDA value defined via dt-blob.bin then it will be set to 0, otherwise 1. Manually setting it in config.txt overrides that, but doesn't make the configuration valid. i've removed the manual override in...
by sworteu
Wed May 01, 2019 1:27 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Got i2c command tested trough a log, with this output:
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory
It seems the i2c0 is not being added correctly perhaps in the dtblob?
by sworteu
Wed May 01, 2019 12:53 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Hi 6by9, - Use "vcgencmd get_config ignore_lcd" to confirm that the firmware has seen the I2C setup. It should be 0 (ie don't ignore). -- Tried it was set to "1", so i added to /boot/config.txt "ignore_lcd=-0", then tested again and it showed "0" as expected. - Temporarily add "dtparam=i2c_vc=on" to...
by sworteu
Wed May 01, 2019 8:35 am
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

Re: CM3+ with 7" display on DSI0

Hi 6by9, Thanks for your fast response. So i've tested this, but it doesn't seem to work for me somehow. This is my dt-blob.dts (i've compiled to be dt-blob.bin) part for the cm3 pins: (i've left out the videocore stuff and other boards) pins_cm3 { // Pi 3 CM3 pin_config { pin@default { polarity = "...
by sworteu
Tue Apr 30, 2019 12:11 pm
Forum: Compute Module
Topic: CM3+ with 7" display on DSI0
Replies: 20
Views: 5531

CM3+ with 7" display on DSI0

Hi readers, We have a customised CM3+ board which uses DSI0 (display port) to use the official raspberry pi 7" display. The i2c connections are made for the display GPIO0 = SCL0 and GPIO1 = SDA0. The dsi0 is connected using the flatcable to the 7" official display driver board. The driver board is p...
by sworteu
Sun Apr 17, 2016 11:29 am
Forum: Other programming languages
Topic: Anyone tried Xojo for development?
Replies: 3
Views: 1205

Re: Anyone tried Xojo for development?

In order to use Xojo apps on raspbian, you should use sftp (SSH File Transfer) with Filezilla or any other supported FTP program.

It's super easy to use once you understand how it works.
by sworteu
Sun Apr 17, 2016 11:27 am
Forum: General discussion
Topic: Is Win10 IoT the best choice for me?
Replies: 10
Views: 1538

Re: Is Win10 IoT the best choice for me?

Thanks again ghans and Heater for your replies. It certainly seems there is a wide choice available. I must admit I hadn't even thought of node.js so I'm adding that to my list of options. I have stumbled across XOJO for Raspian which offers a very similar syntax and framework to what I am used to,...

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