1 files changed, 77 insertions, 0 deletions
diff --git a/common/backlight.c b/common/backlight.c
new file mode 100644
index 0000000000..00dc04a075
--- /dev/null
+++ b/common/backlight.c
@@ -0,0 +1,77 @@
+/*
+Copyright 2013 Mathias Andersson <wraul@dbox.se>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "backlight.h"
+#include "eeconfig.h"
+#include "debug.h"
+
+backlight_config_t backlight_config;
+
+void backlight_init(void)
+{
+    /* check signature */
+    if (!eeconfig_is_enabled()) {
+        eeconfig_init();
+    }
+    backlight_config.raw = eeconfig_read_backlight();
+    backlight_set(backlight_config.enable ? backlight_config.level : 0);
+}
+
+void backlight_increase(void)
+{
+    if(backlight_config.level < BACKLIGHT_LEVELS)
+    {
+        backlight_config.level++;
+        backlight_config.enable = 1;
+        eeconfig_write_backlight(backlight_config.raw);
+    }
+    dprintf("backlight increase: %u\n", backlight_config.level);
+    backlight_set(backlight_config.level);
+}
+
+void backlight_decrease(void)
+{
+    if(backlight_config.level > 0)
+    {
+        backlight_config.level--;
+        backlight_config.enable = !!backlight_config.level;
+        eeconfig_write_backlight(backlight_config.raw);
+    }
+    dprintf("backlight decrease: %u\n", backlight_config.level);
+    backlight_set(backlight_config.level);
+}
+
+void backlight_toggle(void)
+{
+    backlight_config.enable ^= 1;
+    eeconfig_write_backlight(backlight_config.raw);
+    dprintf("backlight toggle: %u\n", backlight_config.enable);
+    backlight_set(backlight_config.enable ? backlight_config.level : 0);
+}
+
+void backlight_step(void)
+{
+    backlight_config.level++;
+    if(backlight_config.level > BACKLIGHT_LEVELS)
+    {
+        backlight_config.level = 0;
+    }
+    backlight_config.enable = !!backlight_config.level;
+    eeconfig_write_backlight(backlight_config.raw);
+    dprintf("backlight step: %u\n", backlight_config.level);
+    backlight_set(backlight_config.level);
+}