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November 17, 2012 20:23
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Nov 17, 2012 . 1 changed file with 16 additions and 5 deletions.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -1,8 +1,14 @@ // Compile with $ gcc -o lmutracker lmu.m -framework IOKit -framework CoreFoundation -framework Foundation // Usage: ./lmu [now] // Prints out the value from the ambient light sensor and the back light LED every 1/10 of a second. Optionally print just one value. // Inspired by the code found at // http://google-mac-qtz-patches.googlecode.com/svn-history/r5/trunk/AmbientLightSensor // and http://osxbook.com/book/bonus/chapter10/light/ // and http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Archives/Computing/2010_February_10#Mac_OS_X_keyboard_backlight_drivers // http://forums.macrumors.com/showthread.php?t=1133446 #include <stdio.h> #include <string.h> #import <Foundation/Foundation.h> #import <IOKit/IOKitLib.h> @@ -70,19 +76,24 @@ int main (int argc, const char * argv[]) { // The code at http://google-mac-qtz-patches.googlecode.com/svn-history/r5/trunk/AmbientLightSensor // suggests that values be calibrated to 0x00FFFFFF for the MacbookPro5 family and 1600 otherwise // This seems too low. // Output as high as 67,092,480 (0x03ffc000) has been observed on my Macbook 5,2 // So I'll report the raw value instead and remove the calibration code. // Also since for the MBP5,2 the two values agree // (there is only one ALS sensor) I'll report only the maximum value. // The LED value however does seem to go 0-4091 though the values do not seem fixed. // They vary with light level and time such that maxing it out results in slightly // lower values over time. // Somewhere between 2,500,000 and 3,000,000 the KB light turns off. It's hard to capture it since the light ramps off. printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b%llu %llu ", MAX(values[0],values[1]), out_brightness); // if we pass in `now` as an arg, only report 1 value if(argc > 1 && strcmp("now", argv[1]) == 0) { break; } sleep(0.1); //lame way to slow down the output } } -
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,92 @@ // Inspired by the code found at // http://google-mac-qtz-patches.googlecode.com/svn-history/r5/trunk/AmbientLightSensor // and http://osxbook.com/book/bonus/chapter10/light/ // http://forums.macrumors.com/showthread.php?t=1133446 // Compile with $ gcc -o lmutracker lmu.m -framework IOKit -framework CoreFoundation -framework Foundation #import <Foundation/Foundation.h> #import <IOKit/IOKitLib.h> io_connect_t dataPort; enum { kGetSensorReadingID = 0, // getSensorReading(int *, int *) kGetLEDBrightnessID = 1, // getLEDBrightness(int, int *) kSetLEDBrightnessID = 2, // setLEDBrightness(int, int, int *) kSetLEDFadeID = 3, // setLEDFade(int, int, int, int *) }; int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; kern_return_t kr = KERN_FAILURE; io_service_t serviceObject; // Look up a registered IOService object whose class is AppleLMUController serviceObject = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleLMUController")); if (serviceObject) { NSLog(@"Got device AppleLMUController"); kr = IOServiceOpen(serviceObject, mach_task_self(), 0, &dataPort); } IOObjectRelease(serviceObject); if (kr == KERN_SUCCESS) { NSLog(@"IOServiceOpen succeeded"); while (1) { //Get the ALS reading uint32_t scalarOutputCount = 2; uint64_t values[scalarOutputCount]; kr = IOConnectCallMethod(dataPort, kGetSensorReadingID, nil, 0, nil, 0, values, &scalarOutputCount, nil, 0); // Get the LED reading uint32_t scalarInputCountKB = 1; uint32_t scalarOutputCountKB = 1; uint64_t in_unknown = 0, out_brightness; kr = IOConnectCallMethod(dataPort, kGetLEDBrightnessID, &in_unknown, scalarInputCountKB, nil, 0, &out_brightness, &scalarOutputCountKB, nil, 0); // The code at http://google-mac-qtz-patches.googlecode.com/svn-history/r5/trunk/AmbientLightSensor // suggests that values be calibrated to 0x00FFFFFF for the MacbookPro5 family and 1600 otherwise // This seems too low. // Output as high as 67092480 (0x03ffc000) has been observed on my Macbook 5,2 // So I'll report the raw value instead and remove the calibration code. // Also since for the MBP5,2 the two values agree // (there is only one ALS sensor) I'll report only the maximum value. // The LED value however does seem to go 0-4091 though the values do not seem fixed. // They vary with light level and time such that maxing it out results in slightly // lower values over time. // Somewhere between 2500000 and 3000000 the KB light turns off. It's hard to capture it since the light ramps off. NSLog(@"ALS, LED %d,%d",MAX(values[0],values[1]),out_brightness); sleep(1); //lame way to slow down the output } } [pool drain]; return 0; }