Diff: myLED.cpp

Revision:

0:808f7981f647

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/myLED.cpp	Thu Dec 30 15:17:29 2010 +0000
@@ -0,0 +1,183 @@
+/** LED Cube 4x4x4 control library
+ *
+ *  @class   LED_Cube444
+ *  @author  Yuji Notsu
+ *  @version 0.1(30-Dec-2010) : 1st revision
+ *   
+ *      This is a library for a demo code of 4x4x4 LED Cube 
+ *      How to make of 4x4x4 LED cube is reffered to Make: vol.8
+ *      Material : 
+ *           64 LED, 4 NPN Transistor(2SC2120 etc.),
+ *           4 of 1kOhm Resistance(for use of base current limitation),
+ *           16 of 150[Ohm] Resistance(for use of LED current limitation)
+ *           and mbed
+ *
+ */
+
+
+#include "myLED.h"
+
+//** Class constructor for LED_Cube444
+// *  
+// *  This will create the instance and start periodical routine to display class internal buffer content to LED cube
+// */
+
+LED_Cube444::LED_Cube444() : anode(A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11,A12,A13,A14,A15), cathode( CATHODE0, CATHODE1, CATHODE2, CATHODE3 ), syncronous( 1 ) {
+    cathode = 0x0;
+    t.attach( this, &LED_Cube444::display, DISPLAY_REFRESH_RATE );
+}
+
+//** Set bits into cube
+// *  
+// *  The 16 bit word array will be copied into class internal buffer. 
+// *  It will be displayed at next update timing by periodical routine
+// * 
+// *  @param    v[4]     whole cube bits can be represented in this array. each U16 data represents the bits on each planes. 
+// */
+
+void LED_Cube444::set_bits( U16 v[4] ) {
+    buffer_copy( v, temp_buffer );
+}
+
+//** Set bits into cube
+// *  
+// *  The 16 bit word will be copied into specified layer of class internal buffer. 
+// *  It will be displayed at next update timing by periodical routine
+// * 
+// *  @param    v        Bit pattern for a layer. Overwrites the buffer contents 
+// */
+
+void LED_Cube444::set_bits( int layer, U16 v ) {
+    temp_buffer[ layer ]    = v;
+}
+
+//** Set bit into cube
+// *  
+// *  Set a specified bit in the buffer.  
+// *  It will be displayed at next update timing by periodical routine
+// * 
+// *  @param    x        Coodinate: x
+// *  @param    y        Coodinate: y 
+// *  @param    z        Coodinate: z 
+// *  @param    v        Value for the bit (0 or 1) 
+// */
+
+void LED_Cube444::set_bit( int x, int y, int z, U16 v ) {
+    if ( v )
+        temp_buffer[ z ]    |= 0x1 << ((y << 2) + x);
+    else
+        temp_buffer[ z ]    &= ~(0x1 << ((y << 2) + x));
+}
+
+//** Clear
+// *  
+// *  Tuen-off all LEDs
+// */
+
+void LED_Cube444::clear( void ) {
+    set_all_words( 0x0000 );
+}
+
+//** All on
+// *  
+// *  Tuen-on all LEDs
+// */
+ 
+void LED_Cube444::all_on( void ) {
+    set_all_words( 0xFFFF );
+}
+
+/** Set bits into cube
+ *  
+ *  The 16 bit word will be copied into all layers of class internal buffer. 
+ *  It will be displayed at next update timing by periodical routine
+ * 
+ *  @param    v        Bit pattern for layers. Overwrites the buffer contents 
+ */
+
+void LED_Cube444::set_all_words( int v ) {
+    temp_buffer[ 0 ]    = v;
+    temp_buffer[ 1 ]    = v;
+    temp_buffer[ 2 ]    = v;
+    temp_buffer[ 3 ]    = v;
+}
+
+//** Setting for synchronous display update
+// *  
+// *  If the "synchronous display" option is set (default) the display 
+// *  (main) buffer will be updated each timing if just before layer 0 update. 
+// *  This machanism has been made to avoid flicker when main routine update 
+// *  buffer so frequently. 
+// *  To implement this mechanism, this class has 2 buffers. 
+// *  One is called main buffer and another is temporary buffer. 
+// *  All API calls that makes modifications of the buffer content will affect to the temp buffer. 
+// *  The display will be done with main buffer contents. So the timing of update can be controled by buffer copying. 
+// *  If the "synchronous display" option is cleard, the temporary buffer will be used for display (not tested). 
+// * 
+// *  @param    v        TRUE for set, FALSE for clear 
+// */
+
+void LED_Cube444::set_synchronous_draw( int v ) {
+    syncronous  = v;
+}
+
+/** Displaying
+ *  
+ *  This function will be called by Ticker which set by this class' constructor. 
+ *  It displays just one layer by single call. 
+ */
+
+void LED_Cube444::display( void ) {
+    static int  layer = 0;
+    U16         *the_buffer;
+
+    if ( !layer & syncronous )
+        buffer_copy(temp_buffer, main_buffer);
+
+    if ( syncronous )
+        the_buffer  = main_buffer;
+    else
+        the_buffer  = temp_buffer;
+
+    cathode = 0x0;
+    set_serialregister( the_buffer[ layer ] );
+    cathode = 0x1 << layer;
+
+    layer++;
+    layer   &= 0x3;
+}
+
+//** Data for serial register
+// *  
+// *  Drives the pins to send serial data to serial register on the shield 
+// *
+// *  @param    v        Bit pattern for a layer. 
+// */
+
+void LED_Cube444::set_serialregister( U16 v ) {
+   // for ( int i = 0; i < SR_BIT_LENGTH; i++ ) {
+   //     sr_data = ((v >> i) & 0x1);
+   //     sr_clk  = 0;
+   //     sr_clk  = 1;
+   // }
+   for(int i=0;i< SR_BIT_LENGTH;i++)
+   {
+    anode = v & 0xffff;
+   }
+
+}
+
+//** Array copy function
+// *  
+// *  Just copies the array. Loop is unrolled because it;s not big array.  
+// *
+// *  @param    src      Pointer to source array.
+// *  @param    trg      Pointer to target array.
+// */
+
+void LED_Cube444::buffer_copy( U16 *src, U16 *trg ) {
+    trg[ 0 ]    = src[ 0 ];
+    trg[ 1 ]    = src[ 1 ];
+    trg[ 2 ]    = src[ 2 ];
+    trg[ 3 ]    = src[ 3 ];
+}