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authorjmccrohan <jmccrohan@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2017-05-27 17:37:05 +0000
committerjmccrohan <jmccrohan@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>2017-05-27 17:37:05 +0000
commitcb69a93a4501b2a58e1f991c953b3c58d6ceeb67 (patch)
tree94aa584f67a541435d06f0f375e40f2f0e5f9ff6 /filter.c
parent4e055ed9cbda058f02f81571cc31e4cd6ef9afc2 (diff)
downloadlcd4linux-trunk.tar.gz
picoLCDGraphic: change backlight from bool to byteHEADtrunkmaster
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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