Waveshare AMOLED - revision history

Dank: /* Touch rotation */

2024-04-22T09:50:49Z

Touch rotation

← Older revision		Revision as of 09:50, 22 April 2024
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	==Touch rotation==		==Touch rotation==
	~~Add~~ the appropriate <tt>CalibrationMatrix</tt> to the <tt>touchscreen</tt> libevent stanza. For instance, rotate 90 degrees clockwise with <tt>Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"</tt>.		We can do it through Xorg: add the appropriate <tt>CalibrationMatrix</tt> to the <tt>touchscreen</tt> libevent stanza. For instance, rotate 90 degrees clockwise with <tt>Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"</tt>. But this will only work for X.

			If we want to handle all libinput consumers (particularly [[Wayland]]), it's better to make a [[udev]] rule that sets <tt>
			ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1</tt>. You can test this by checking <tt>libinput list-devices \| grep ^Calibration:</tt>.

	==Assembling front pane==		==Assembling front pane==

2024-04-10T12:34:10Z

Console rotation

← Older revision		Revision as of 12:34, 10 April 2024
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	==Console rotation==		==Console rotation==
	Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/cmdline.txt</tt>. This has no effect on Xorg.		Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/firmware/cmdline.txt</tt>. This has no effect on Xorg.

	==Touch rotation==		==Touch rotation==

2024-04-08T17:41:12Z

Console rotation

← Older revision		Revision as of 17:41, 8 April 2024
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	==Console rotation==		==Console rotation==
	Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/cmdline.txt</tt>. This has no effect on Xorg.		Write 1 to <tt>/sys/class/graphics/fbcon/rotate</tt>. To do it from the kernel, add <tt>fbcon=rotate:1</tt> to the kernel command line; in Raspbian, this is done by editing <tt>/boot/cmdline.txt</tt>. This has no effect on Xorg.

			==Touch rotation==
			Add the appropriate <tt>CalibrationMatrix</tt> to the <tt>touchscreen</tt> libevent stanza. For instance, rotate 90 degrees clockwise with <tt>Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"</tt>.

	==Assembling front pane==		==Assembling front pane==

2022-08-26T01:12:35Z

← Older revision		Revision as of 01:12, 26 August 2022
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	* LED long leg to 330Ω resistor		* LED long leg to 330Ω resistor
	* Resistor to GPIO pin 12		* Resistor to GPIO pin 12

			==Setup for [[Counterforce]]==
			* We want automatic login to X. Potato uses [http://www.lxde.org/ LXDE] by default.
			** <tt>$HOME/.config/lxsession/LXDE/autostart</tt> of the logged in user defines the Xsession.
			** Be sure to launch <tt>xscreensaver -no-splash</tt> to avoid AMOLED burnin

2022-06-02T22:05:26Z

Raspbian

← Older revision		Revision as of 22:05, 2 June 2022
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	</pre>		</pre>

	When using the [[Potato\|Libre Potato]], the <tt>meson_dw_hdmi</tt> module must be blacklisted, or you'll get a black screen. This can probably be worked around, but I don't yet know how.		When using the [[Potato\|Libre Potato]], the <tt>meson_dw_hdmi</tt> module must be blacklisted, or you'll get a black screen. This can probably be worked around, but I don't yet know how. Using the "fbdev" driver, you'll need a <tt>Rotate</tt> directive in <tt>xorg.conf</tt> to rotate the AML-S905X-CC Meson's Mali GPU (<tt>xrandr</tt> is not supported).

	==Console rotation==		==Console rotation==

2022-06-02T19:45:17Z

Raspbian

← Older revision		Revision as of 19:45, 2 June 2022
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	hdmi_timings=1080 1 26 4 50 1920 1 8 2 6 0 0 0 60 0 135580000 3		hdmi_timings=1080 1 26 4 50 1920 1 8 2 6 0 0 0 60 0 135580000 3
	</pre>		</pre>

			When using the [[Potato\|Libre Potato]], the <tt>meson_dw_hdmi</tt> module must be blacklisted, or you'll get a black screen. This can probably be worked around, but I don't yet know how.

	==Console rotation==		==Console rotation==

2022-06-02T01:37:13Z

Raspbian

2022-06-02T01:37:00Z

Raspbian

2022-06-02T01:36:14Z

← Older revision		Revision as of 01:36, 2 June 2022
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	==Green LED==		==Green LED==
	When the device is powered up, a green LED will blink if it is not receiving an HDMI signal. The manual only mentions that this can happen due to power supply issues, but that is incorrect (power supply issues <i>can</i> cause this symptom, but it can also simply be due to missing/bad HDMI input).		When the device is powered up, a green LED will blink if it is not receiving an HDMI signal. The manual only mentions that this can happen due to power supply issues, but that is incorrect (power supply issues <i>can</i> cause this symptom, but it can also simply be due to missing/bad HDMI input).

			==Raspbian==


	==Console rotation==		==Console rotation==

2022-05-29T22:57:08Z

← Older revision		Revision as of 22:57, 29 May 2022
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	The [https://www.waveshare.com/wiki/5.5inch_HDMI_AMOLED Waveshare wiki page] for the device is a good place to start. The screen takes anywhere from 250 to 650mA, using more power to display lighter, brighter pixels.		The [https://www.waveshare.com/wiki/5.5inch_HDMI_AMOLED Waveshare wiki page] for the device is a good place to start. The screen takes anywhere from 250 to 650mA, using more power to display lighter, brighter pixels.

			==Green LED==
			When the device is powered up, a green LED will blink if it is not receiving an HDMI signal. The manual only mentions that this can happen due to power supply issues, but that is incorrect (power supply issues <i>can</i> cause this symptom, but it can also simply be due to missing/bad HDMI input).

	==Console rotation==		==Console rotation==