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by zashi
Tue Jun 14, 2016 11:55 am
Forum: Advanced users
Topic: Help writing an overlay (dts / device tree) for an ssd1307
Replies: 14
Views: 3901

Re: Help writing an overlay (dts / device tree) for an ssd13

Nope, but if you get it working please post. I never could.
by zashi
Sun Apr 05, 2015 2:27 pm
Forum: Advanced users
Topic: Help writing an overlay (dts / device tree) for an ssd1307
Replies: 14
Views: 3901

Re: Help writing an overlay (dts / device tree) for an ssd13

I'm not running a stock kernel, but yes, I of course have the ssd1307fb module compiled.

No, I do not see anything on the i2c bus in /sys/bus/i2c. If you're wondering if i2c is loaded and working, it clearly is, as you can see the oled driver on the i2c bus via i2cdetect.
by zashi
Sat Apr 04, 2015 10:40 pm
Forum: Advanced users
Topic: Help writing an overlay (dts / device tree) for an ssd1307
Replies: 14
Views: 3901

Re: Help writing an overlay (dts / device tree) for an ssd13

I'm not running a stock kernel, and yes I have ssd1307fb.ko built.
by zashi
Sat Apr 04, 2015 2:44 pm
Forum: Advanced users
Topic: Help writing an overlay (dts / device tree) for an ssd1307
Replies: 14
Views: 3901

Help writing an overlay (dts / device tree) for an ssd1307

I could use a little help / sanity check trying to get an overlay working. I've got a ssd1306-based OLED screen wired up. It's uses i2c. i2cdetect -y 1 shows me the device on the i2c bus. To use the in-kernel driver for the ssd1306 (which is ssd1307fb.ko), you have to add a device tree entry. I wrot...
by zashi
Mon Nov 10, 2014 7:43 pm
Forum: General discussion
Topic: Specific Switching Regulator Used in Model B+?
Replies: 9
Views: 1544

Re: Specific Switching Regulator Used in Model B+?

Thanks everyone. I see PAM2306AYPKE can take up to 5.5 v. So it looks like I will be throwing together my own regulator board.
by zashi
Mon Nov 10, 2014 6:50 pm
Forum: General discussion
Topic: Specific Switching Regulator Used in Model B+?
Replies: 9
Views: 1544

Re: Specific Switching Regulator Used in Model B+?

This partial schematic? https://cdn.shopify.com/s/files/1/0315/6117/files/Raspberry-Pi-model-b-plus-connector-schematic-raspberry-pi-australia.pdf I do not see a switching reg in there. I see a mosfet (DMG2305UXP) and a 2-in-1 package pnp transistor pack (DMMT5401). Am I not looking at the right sch...
by zashi
Mon Nov 10, 2014 5:36 pm
Forum: General discussion
Topic: Specific Switching Regulator Used in Model B+?
Replies: 9
Views: 1544

Specific Switching Regulator Used in Model B+?

I have not been able to determine what switching regulator is used on the Model B+. Looking at the chips near the power connector and googling the markings proved unfruitful. I would like to know so I can check the tolerances for source voltage. Does anyone have the datasheet for the regulator or in...

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