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| author | jmccrohan <jmccrohan@3ae390bd-cb1e-0410-b409-cd5a39f66f1f> | 2017-05-27 17:37:05 +0000 |
|---|---|---|
| committer | jmccrohan <jmccrohan@3ae390bd-cb1e-0410-b409-cd5a39f66f1f> | 2017-05-27 17:37:05 +0000 |
| commit | cb69a93a4501b2a58e1f991c953b3c58d6ceeb67 (patch) | |
| tree | 94aa584f67a541435d06f0f375e40f2f0e5f9ff6 /glossary.html | |
| parent | 4e055ed9cbda058f02f81571cc31e4cd6ef9afc2 (diff) | |
| download | lcd4linux-trunk.tar.gz | |
Based on patch submitted by Mike Edwards <pf-debian-bugs@mirkwood.net>
to Debian Bug #861993 (https://bugs.debian.org/861993). See excerpt from bug
report below.
-----------------------------------------
Dear Maintainer,
Using driver 'picoLCDGraphic' in lcd4linux.conf, backlight can only be set to 0 or 1 (off/on).
While the backlight of the picolcd is on at boot, the moment lcd4linux starts, the backlight turns
off with either setting.
Looking at the source for the driver, I found that somewhere along the line, the function to
set the backlight had been changed to use an 8 bit value from 0 - 255, effectively making this
a brightness setting:
static int drv_pLG_backlight(int backlight)
{
unsigned char cmd[2] = { 0x91 }; /* set backlight */
if (backlight < 0)
backlight = 0;
if (backlight > 255)
backlight = 255;
cmd[1] = backlight;
drv_pLG_send(cmd, 2);
return backlight;
}
... but the config option for backlight was still limited to only accepting a 0 or 1:
if (cfg_number(section, "Backlight", 0, 0, 1, &value) > 0) {
info("Setting backlight to %d", value);
drv_pLG_backlight(value);
}
I've patched that if statement above to accept values between 0 and 255. Now, setting the config
option for backlight to 255 in lcd4linux.conf does result in the backlight being turned on at
full brightness.
-----------------------------------------
Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@1204 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
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