SSD1306 Support

[pacmac]

Hello

Any chance that you can provide a driver for the SSD1306

http://www.eimodule.com/index.php?main_page=product_info&cPath=25&products_id=51

http://learn.adafruit.com/monochrome-oled-breakouts

This is quite a popular driver !

Many Thanks

PeterC

[notro]

I had a SSD1306 display on my list earlier, but I removed it when I didn't find anything to drive the Nokia 3310 monochorome display, which I had a driver for.
First I implemented the Nokia 3310 driver as a monochrome driver, but couldn't find any programs to drive it. The Linux console didn't work either. So later I implemented it as a regular RGB565 driver, and convert to monochorme when updating the display. This means that black turns the pixel off, and any other color turns the pixel on.
This way it can be used as a Linux console, but of limited value as the screen is so small.

How do you plan to use such a display? With a custom program?

[pacmac]

I bought 20 of the nokia 3310 displays a few years ago on ebay for a project, but never used them and other than the 6110 it's the only SPI display I have, so that's why I have used it to prove / test the install on ARCH Linux.

I have already ordered some 3.2" and 1.8" displays for a more thourough test, but they will only arrive late next week.

But I plan to use the little 128x 64 OLED display to show the machine status i.e.:

Date/Time, Uptime, Free Ram, Free Disk, CPU %, CPU Temp etc etc

It would not really be practical to use it as a console, it's really just for system info.

[notro]

What's the benefit of using a monochrome OLED display, compared to a color 1.8" TFT display (128x160)?
Size, power consumption?
I have seen the 1.8" displays as low as $6 on ebay: https://github.com/notro/fbtft/wiki/More-LCD-Modules#hy-18-spi

[pacmac]

For me it's space, I'm using RPI in embedded solutions that often do not require full graphic touch screens, and to reduce costs I prefer to stick to a commercially available casing that requires only the front and rear panels to be machined.

[notro]

I haven't seen use cases for these tiny monochorme displays before, but this certainly is a good one.
I have ordered this one: Monochrome 1.3" 128x64 OLED graphic display (SSD1306): http://www.adafruit.com/products/938

[notro]

New release out with SSD1306 support.

[koenkooi]

SSD1306 and SSD1307 support is already in mainline linux: https://github.com/torvalds/linux/blob/master/drivers/video/ssd1307fb.c

And there are better drivers for other displays available as well, e.g. st7735

[notro]

SSD1306 and SSD1307 support is already in mainline linux

Thanks, I wasn't aware of that driver.
I would regard this as a complementary driver, as it supports I2C and not SPI.

And there are better drivers for other displays available as well, e.g. st7735

Can you elaborate on what you mean by 'better'?
Are you referring to Matt Porter's driver?

[goobiez]

Help me .. l

I have lcd tft 4.3 inchi but I can not use it because I can not make a driver for raspberries like you, can you can provide a driver for the SSD1963

http://www.emartee.com/product/42175/

Many Thanks

[notro]

I have opened another issue, as this request has nothing to do with this issue.

[notro]

Closing issue since there has been no activity for more than 2 months. Reopen if needed.

[cmcqueen]

I'm trying to use this driver, by cross-compiling. I've followed the instructions as best I can here and here. I'm compiling kernel 3.12.20+ (branch rpi-3.12.y, commit eb514e9620).

When I try booting, I get an error in /var/log/messages:

May 20 07:17:22 raspberrypi kernel: [   16.211083] fb_ssd1306 spi0.0: no default functions for regwidth=8 and buswidth=0
May 20 07:17:22 raspberrypi kernel: [   16.232274] ------------[ cut here ]------------
May 20 07:17:22 raspberrypi kernel: [   16.238594] WARNING: CPU: 0 PID: 336 at drivers/gpio/gpiolib.c:160 gpio_ensure_requested+0x6c/0xe8()
May 20 07:17:22 raspberrypi kernel: [   16.251039] autorequest GPIO-23
May 20 07:17:22 raspberrypi kernel: [   16.255782] Modules linked in: fb_ssd1306(+) fbtft syscopyarea sysfillrect sysimgblt fb_sys_fops snd_soc_bcm2708_i2s regmap_mmio snd_soc_core snd_compress regmap_i2c snd_pcm_dmaengine regmap_spi snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer leds_gpio led_class snd spi_bcm2708
May 20 07:17:22 raspberrypi kernel: [   16.288083] CPU: 0 PID: 336 Comm: modprobe Not tainted 3.12.20+ #2
May 20 07:17:22 raspberrypi kernel: [   16.296010] [<c001444c>] (unwind_backtrace+0x0/0xec) from [<c001172c>] (show_stack+0x10/0x14)
May 20 07:17:22 raspberrypi kernel: [   16.307879] [<c001172c>] (show_stack+0x10/0x14) from [<c001f794>] (warn_slowpath_common+0x68/0x88)
May 20 07:17:22 raspberrypi kernel: [   16.320347] [<c001f794>] (warn_slowpath_common+0x68/0x88) from [<c001f7e4>] (warn_slowpath_fmt+0x30/0x40)
May 20 07:17:22 raspberrypi kernel: [   16.333460] [<c001f7e4>] (warn_slowpath_fmt+0x30/0x40) from [<c0264edc>] (gpio_ensure_requested+0x6c/0xe8)
May 20 07:17:22 raspberrypi kernel: [   16.346691] [<c0264edc>] (gpio_ensure_requested+0x6c/0xe8) from [<c0265814>] (gpiod_direction_input+0x5c/0x1bc)
May 20 07:17:22 raspberrypi kernel: [   16.360419] [<c0265814>] (gpiod_direction_input+0x5c/0x1bc) from [<bf0cf250>] (fbtft_free_gpios+0x64/0xc8 [fbtft])
May 20 07:17:22 raspberrypi kernel: [   16.374454] [<bf0cf250>] (fbtft_free_gpios+0x64/0xc8 [fbtft]) from [<bf0d0064>] (fbtft_register_framebuffer+0x19c/0x310 [fbtft])
May 20 07:17:22 raspberrypi kernel: [   16.389758] [<bf0d0064>] (fbtft_register_framebuffer+0x19c/0x310 [fbtft]) from [<bf0d13f8>] (fbtft_probe_common+0x144/0x2d8 [fbtft])
May 20 07:17:22 raspberrypi kernel: [   16.405488] [<bf0d13f8>] (fbtft_probe_common+0x144/0x2d8 [fbtft]) from [<c02a7290>] (really_probe+0x60/0x1e4)
May 20 07:17:22 raspberrypi kernel: [   16.419170] [<c02a7290>] (really_probe+0x60/0x1e4) from [<c02a7500>] (__driver_attach+0x98/0x9c)
May 20 07:17:22 raspberrypi kernel: [   16.431700] [<c02a7500>] (__driver_attach+0x98/0x9c) from [<c02a5824>] (bus_for_each_dev+0x60/0x94)
May 20 07:17:22 raspberrypi kernel: [   16.444516] [<c02a5824>] (bus_for_each_dev+0x60/0x94) from [<c02a6b0c>] (bus_add_driver+0x1c4/0x274)
May 20 07:17:22 raspberrypi kernel: [   16.457396] [<c02a6b0c>] (bus_add_driver+0x1c4/0x274) from [<c02a7b78>] (driver_register+0x78/0xf8)
May 20 07:17:22 raspberrypi kernel: [   16.470236] [<c02a7b78>] (driver_register+0x78/0xf8) from [<bf0df00c>] (fbtft_driver_module_init+0xc/0x30 [fb_ssd1306])
May 20 07:17:22 raspberrypi kernel: [   16.484839] [<bf0df00c>] (fbtft_driver_module_init+0xc/0x30 [fb_ssd1306]) from [<c000861c>] (do_one_initcall+0x114/0x17c)
May 20 07:17:22 raspberrypi kernel: [   16.499597] [<c000861c>] (do_one_initcall+0x114/0x17c) from [<c006cc2c>] (load_module+0x1988/0x1e98)
May 20 07:17:22 raspberrypi kernel: [   16.512498] [<c006cc2c>] (load_module+0x1988/0x1e98) from [<c006d218>] (SyS_init_module+0xdc/0xf0)
May 20 07:17:22 raspberrypi kernel: [   16.525209] [<c006d218>] (SyS_init_module+0xdc/0xf0) from [<c000dec0>] (ret_fast_syscall+0x0/0x30)
May 20 07:17:22 raspberrypi kernel: [   16.537929] ---[ end trace e2cac251df303484 ]---
May 20 07:17:22 raspberrypi kernel: [   16.546423] fb_ssd1306: probe of spi0.0 failed with error -22

I tried adding .buswidth = 8 in struct fbtft_display display in fb_ssd1306.c. That seems to get rid of that error.

But I'm still getting the other error fb_ssd1306: probe of spi0.0 failed with error -22. I notice there's no device /dev/spidev0.0, only a /dev/spidev0.1.

• kernel patch
• fbtft patch

[cmcqueen]

I've got it working now. I had to add an entry { "dc", 24 }, to struct spi_board_info bcm2708_spi_devices[] in bcm2708.c. I removed the line { "backlight", 23 }, which isn't needed I guess.

[kenrestivo]

Well I'm glad you got it working. It doesn't seem to want to work at all for me, referencing here: #169

The hardware works; I can drive it beautifully using spidev and some userspace libraries. However, fbtft does not work; I just get a blank screen. I'm using the default GPIOs described in the wiki.

[pingec]

Hello. notro, you mentioned that you wrote an I2C driver for SSD1306? Where can it be found? I am looking for a tiny lcd to add to the wt3020 device and have only 2 gpios to spare...

[notro]

I have some code, but I'm not sure how the future of fbtft is going to be, so it's still not finished.
There is however support in the kernel for ssd1306 and i2c: http://lxr.free-electrons.com/source/drivers/video/fbdev/ssd1307fb.c

[timonsku]

Is the 128x32 SPI version also supported? If not what would I need to modify in order to get it working?

[kenrestivo]

The SSD1306 is 128x32. It supports SPI. You have to set the frequency to low enough to deal with whatever wiring you have (1Mbps is fine, 6Mbps is too fast).