Diff: keyboard.cpp

Revision:

3:f7bce78b04c1

Child:

6:904d00252480

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keyboard.cpp	Thu Jun 26 11:41:45 2014 +0000
@@ -0,0 +1,78 @@
+/* Keyboard chip TCA8418 control */
+#include "mbed.h"
+#include "keyboard.h"
+
+extern int key_hit_ID;
+//extern mbos CDU_OS;
+
+//CDU Keyboard communications KEYBOARD_INT
+InterruptIn CDU_KB_INT( p5 );  //Set CDU keyboard interrupt line. 
+I2C CDU_KB(p28, p27);          //Communication lines to keyboard chip
+
+//CDU Keyboard LEDS
+DigitalOut EXEC( p12 );
+DigitalOut FAIL( p17 );
+DigitalOut DSPY( p18 );
+DigitalOut  MSG( p19 );
+DigitalOut OFST( p20 );
+
+//CDU background lighting
+AnalogIn BGL_POT( p15 ); //background light control potmeter
+PwmOut BGL_LED( p21 );   //PWM output
+
+/*void CDU_KB_INT_ON()
+{
+    
+    }
+*/    
+
+void CDU_KB_COMM_INIT()
+{   //initialize communication with TCA84818
+    CDU_KB.write(CDU_KB_WRITE); //initiate write cycle
+    //intialize all registers from TCA8418 here
+    CDU_KB.read(CDU_KB_READ); //start reading from TCA4818
+}
+
+void CDU_KB_GET_KEY_TASK()
+{
+    CDU_KB.write(CDU_KB_READ); //initiate read cycle
+    key_hit_ID = CDU_KB.read(CDU_KB_READ)  ;    //read key value
+    //CDU_OS.SetEvent(KEY_EVENT,SEND_KEYMESSAGE_TASK_ID ); //Set event key to wakeup task
+    } 
+
+void CDU_KB_INT_START()
+{
+    CDU_KB_INT.mode( PullUp ); 
+    CDU_KB_INT.fall(&CDU_KB_GET_KEY_TASK);  
+    }
+
+void SET_BGL_INTENSITY( int nVal )
+{
+    //AnalogIn BGL_POT( p15 ); //background light control potmeter. Returns a value between 0.0 and 1.0
+    //PwmOut BGL_LED( p21 );   //PWM output
+    //calculate required brightness in percentage from 0%-100%
+    //nVal 255     --> calculate brightness from potmeter value
+    //nVal = 0     --> switch off backlight
+    //nVal = 100   --> switch on backlight max
+
+    switch (nVal) 
+    {
+        case 0:
+        {
+            //switch off backlighting
+            BGL_LED.pulsewidth( 0.0 );
+            break;
+        }
+        case 100:
+        {
+            //switch on backlighting
+            BGL_LED.pulsewidth( 100.0 );
+            break;
+        }
+        case 255:
+        {
+            //calculate percentage from potmeter value
+            BGL_LED.pulsewidth( 0.0 + 100*BGL_POT );
+        }
+    }
+}