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-rw-r--r--keyboard_light.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/keyboard_light.c b/keyboard_light.c
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+++ b/keyboard_light.c
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+/* --------------------------------------------------------------------------*/
+/* */
+/* get/set the keyboard light level on Apple Mac OS X */
+/* Written by Hans-Christoph Steiner <hans@at.or.at> */
+/* */
+/* Copyright (c) 2008 Free Software Foundation */
+/* */
+/* 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. */
+/* */
+/* See file LICENSE for further informations on licensing terms. */
+/* */
+/* 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, write to the Free Software Foundation, */
+/* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */
+/* */
+/* --------------------------------------------------------------------------*/
+
+#include <mach/mach.h>
+#include <IOKit/IOKitLib.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <m_pd.h>
+
+#define DEBUG(x)
+//#define DEBUG(x) x
+
+#define DEFAULT_DELAYTIME 250
+#define BRIGHTNESS_MAX 0xfff
+
+/*------------------------------------------------------------------------------
+ * CLASS DEF
+ */
+
+static t_class *keyboard_light_class;
+
+typedef struct _keyboard_light {
+ t_object x_obj;
+ t_float fade_time;
+ io_service_t io_service;
+ io_connect_t io_connect;
+} t_keyboard_light;
+
+
+
+enum {
+ kGetSensorReadingID = 0, // getSensorReading(int *, int *)
+ kGetLEDBrightnessID = 1, // getLEDBrightness(int, int *)
+ kSetLEDBrightnessID = 2, // setLEDBrightness(int, int, int *)
+ kSetLEDFadeID = 3, // setLEDFade(int, int, int, int *)
+ // other firmware-related functions
+ verifyFirmwareID = 4, // verifyFirmware(int *)
+ getFirmwareVersionID = 5,// getFirmwareVersion(int *)
+ // other flashing-related functions
+ // ...
+};
+
+/*------------------------------------------------------------------------------
+ * IMPLEMENTATION
+ */
+
+static void keyboard_light_output(t_keyboard_light* x)
+{
+ DEBUG(post("keyboard_light_output"););
+ kern_return_t kernResult;
+ IOItemCount scalarInputCount = 1;
+ IOItemCount scalarOutputCount = 1;
+ SInt32 in_unknown = 0, out_brightness;
+
+ if(x->io_connect)
+ {
+ kernResult = IOConnectMethodScalarIScalarO(x->io_connect,
+ kGetLEDBrightnessID,
+ scalarInputCount,
+ scalarOutputCount,
+ in_unknown,
+ &out_brightness);
+ if( kernResult == KERN_SUCCESS)
+ outlet_float(x->x_obj.ob_outlet, (t_float)out_brightness / BRIGHTNESS_MAX);
+ else if(kernResult == kIOReturnBusy)
+ pd_error(x,"[keyboard_light]: device busy");
+ else
+ pd_error(x,"[keyboard_light]: could not read device");
+ }
+}
+
+
+static void keyboard_light_float(t_keyboard_light* x, t_float f)
+{
+ DEBUG(post("keyboard_light_float"););
+
+ kern_return_t kernResult;
+ IOItemCount scalarInputCount = 3;
+ IOItemCount scalarOutputCount = 1;
+ SInt32 in_unknown = 0, in_brightness, out_brightness;
+
+ if(x->io_connect)
+ {
+ in_brightness = (SInt32) (f * BRIGHTNESS_MAX);
+ if(in_brightness < 0)
+ in_brightness = 0;
+ else if(in_brightness > BRIGHTNESS_MAX)
+ in_brightness = BRIGHTNESS_MAX;
+
+ kernResult = IOConnectMethodScalarIScalarO(x->io_connect,
+ kSetLEDFadeID,
+ scalarInputCount,
+ scalarOutputCount,
+ in_unknown,
+ in_brightness,
+ (SInt32) x->fade_time,
+ &out_brightness);
+ if( kernResult != KERN_SUCCESS)
+ {
+ if(kernResult == kIOReturnBusy)
+ pd_error(x,"[keyboard_light]: device busy");
+ else
+ pd_error(x,"[keyboard_light]: could not write to device");
+ }
+ }
+}
+
+
+static void keyboard_light_free(t_keyboard_light* x)
+{
+ DEBUG(post("keyboard_light_free"););
+}
+
+
+static void *keyboard_light_new(void)
+{
+ DEBUG(post("keyboard_light_new"););
+ t_keyboard_light *x = (t_keyboard_light *)pd_new(keyboard_light_class);
+ kern_return_t kernResult;
+
+ x->io_service = IOServiceGetMatchingService(kIOMasterPortDefault,
+ IOServiceMatching("AppleLMUController"));
+ if(x->io_service)
+ {
+ post("[keyboard_light]: found AppleLMUController");
+ }
+ else
+ {
+ error("[keyboard_light]: AppleLMUController not found, trying IOI2CDeviceLMU");
+ x->io_service = IOServiceGetMatchingService(kIOMasterPortDefault,
+ IOServiceMatching("IOI2CDeviceLMU"));
+ if(x->io_service)
+ {
+ post("[keyboard_light]: found IOI2CDeviceLMU");
+ }
+ else
+ pd_error(x,"[keyboard_light]: no sensor found");
+ }
+ kernResult = IOServiceOpen(x->io_service, mach_task_self(), 0, &x->io_connect);
+
+ IOObjectRelease(x->io_service);
+ if (kernResult != KERN_SUCCESS)
+ {
+ error("[keyboard_light]: IOServiceOpen(): %d", kernResult);
+ }
+
+ x->fade_time = 0.;
+ floatinlet_new(&x->x_obj, &x->fade_time);
+ outlet_new(&x->x_obj, &s_float);
+
+ return (x);
+}
+
+void keyboard_light_setup(void)
+{
+ keyboard_light_class = class_new(gensym("keyboard_light"),
+ (t_newmethod)keyboard_light_new,
+ (t_method)keyboard_light_free,
+ sizeof(t_keyboard_light),
+ CLASS_DEFAULT,
+ A_DEFFLOAT, 0);
+ /* add inlet datatype methods */
+ class_addbang(keyboard_light_class,(t_method) keyboard_light_output);
+ class_addfloat(keyboard_light_class,(t_method) keyboard_light_float);
+}