lolshield-matrix hinzu

1 files changed, 502 insertions, 0 deletions

diff --git a/Matrix_9x14/libraries/Charliplexing/.svn/text-base/Charliplexing.cpp.svn-base b/Matrix_9x14/libraries/Charliplexing/.svn/text-base/Charliplexing.cpp.svn-base
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@@ -0,0 +1,502 @@
+/*
+  Charliplexing.cpp - Using timer2 with 1ms resolution
+  
+  Alex Wenger <a.wenger@gmx.de> http://arduinobuch.wordpress.com/
+  Matt Mets <mahto@cibomahto.com> http://cibomahto.com/
+  
+  Timer init code from MsTimer2 - Javier Valencia <javiervalencia80@gmail.com>
+  Misc functions from Benjamin Sonnatg <benjamin@sonntag.fr>
+  
+  History:
+    2009-12-30 - V0.0 wrote the first version at 26C3/Berlin
+    2010-01-01 - V0.1 adding misc utility functions 
+      (Clear, Vertical,  Horizontal) comment are Doxygen complaints now
+    2010-05-27 - V0.2 add double-buffer mode
+    2010-08-18 - V0.9 Merge brightness and grayscale
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#if defined(ARDUINO) && ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+#include <inttypes.h>
+#include <math.h>
+#include <avr/interrupt.h>
+#include "Charliplexing.h"
+
+volatile unsigned int LedSign::tcnt2;
+
+
+struct videoPage {
+    uint8_t pixels[SHADES][48];  // TODO: is 48 right?
+}; 
+
+/* -----------------------------------------------------------------  */
+/** Table for the LED multiplexing cycles
+ * Each frame is made of 24 bytes (for the 24 display cycles)
+ * There are SHADES frames per buffer in grayscale mode (one for each brigtness)
+ * and twice that many to support double-buffered grayscale.
+ */
+videoPage leds[2];
+
+/// Determines whether the display is in single or double buffer mode
+uint8_t displayMode = SINGLE_BUFFER;
+
+/// Flag indicating that the display page should be flipped as soon as the
+/// current frame is displayed
+volatile boolean videoFlipPage = false;
+
+/// Pointer to the buffer that is currently being displayed
+videoPage* displayBuffer;
+
+/// Pointer to the buffer that should currently be drawn to
+videoPage* workBuffer;
+
+/// Flag indicating that the timer buffer should be flipped as soon as the
+/// current frame is displayed
+volatile boolean videoFlipTimer = false;
+
+
+// Timer counts to display each page for, plus off time
+typedef struct timerInfo {
+    uint8_t counts[SHADES];
+    uint8_t prescaler[SHADES];
+};
+
+// Double buffer the timing information, of course.
+timerInfo* frontTimer;
+timerInfo* backTimer;
+
+timerInfo* tempTimer;
+
+timerInfo timer[2];
+
+// Record a slow and fast prescaler for later use
+typedef struct prescalerInfo {
+    uint8_t relativeSpeed;
+    uint8_t TCCR2;
+};
+
+// TODO: Generate these based on processor type and clock speed
+prescalerInfo slowPrescaler = {1, 0x03};
+//prescalerInfo fastPrescaler = {32, 0x01};
+prescalerInfo fastPrescaler = {4, 0x02};
+
+static bool initialized = false;
+
+/// Uncomment to set analog pin 5 high during interrupts, so that an
+/// oscilloscope can be used to measure the processor time taken by it
+#define MEASURE_ISR_TIME
+#ifdef MEASURE_ISR_TIME
+uint8_t statusPIN = 19;
+#endif
+
+typedef struct LEDPosition {
+    uint8_t high;
+    uint8_t low;
+};
+
+
+/* -----------------------------------------------------------------  */
+/** Table for LED Position in leds[] ram table
+ */
+
+const LEDPosition ledMap[126] = {
+    {13, 5}, {13, 6}, {13, 7}, {13, 8}, {13, 9}, {13,10}, {13,11}, {13,12},
+    {13, 4}, { 4,13}, {13, 3}, { 3,13}, {13, 2}, { 2,13},
+    {12, 5}, {12, 6}, {12, 7}, {12, 8}, {12, 9}, {12,10}, {12,11}, {12,13},
+    {12, 4}, { 4,12}, {12, 3}, { 3,12}, {12, 2}, { 2,12},
+    {11, 5}, {11, 6}, {11, 7}, {11, 8}, {11, 9}, {11,10}, {11,12}, {11,13},
+    {11, 4}, { 4,11}, {11, 3}, { 3,11}, {11, 2}, { 2,11},
+    {10, 5}, {10, 6}, {10, 7}, {10, 8}, {10, 9}, {10,11}, {10,12}, {10,13},
+    {10, 4}, { 4,10}, {10, 3}, { 3,10}, {10, 2}, { 2,10},
+    { 9, 5}, { 9, 6}, { 9, 7}, { 9, 8}, { 9,10}, { 9,11}, { 9,12}, { 9,13},
+    { 9, 4}, { 4, 9}, { 9, 3}, { 3, 9}, { 9, 2}, { 2, 9},
+    { 8, 5}, { 8, 6}, { 8, 7}, { 8, 9}, { 8,10}, { 8,11}, { 8,12}, { 8,13},
+    { 8, 4}, { 4, 8}, { 8, 3}, { 3, 8}, { 8, 2}, { 2, 8},
+    { 7, 5}, { 7, 6}, { 7, 8}, { 7, 9}, { 7,10}, { 7,11}, { 7,12}, { 7,13},
+    { 7, 4}, { 4, 7}, { 7, 3}, { 3, 7}, { 7, 2}, { 2, 7},
+    { 6, 5}, { 6, 7}, { 6, 8}, { 6, 9}, { 6,10}, { 6,11}, { 6,12}, { 6,13},
+    { 6, 4}, { 4, 6}, { 6, 3}, { 3, 6}, { 6, 2}, { 2, 6},
+    { 5, 6}, { 5, 7}, { 5, 8}, { 5, 9}, { 5,10}, { 5,11}, { 5,12}, { 5,13},
+    { 5, 4}, { 4, 5}, { 5, 3}, { 3, 5}, { 5, 2}, { 2, 5},
+};
+
+
+/* -----------------------------------------------------------------  */
+/** Constructor : Initialize the interrupt code. 
+ * should be called in setup();
+ */
+void LedSign::Init(uint8_t mode)
+{
+#ifdef MEASURE_ISR_TIME
+    pinMode(statusPIN, OUTPUT);
+    digitalWrite(statusPIN, LOW);
+#endif
+
+	float prescaler = 0.0;
+	
+#if defined (__AVR_ATmega168__) || defined (__AVR_ATmega48__) || defined (__AVR_ATmega88__) || defined (__AVR_ATmega328P__) || (__AVR_ATmega1280__)
+	TIMSK2 &= ~(1<<TOIE2);
+	TCCR2A &= ~((1<<WGM21) | (1<<WGM20));
+	TCCR2B &= ~(1<<WGM22);
+	ASSR &= ~(1<<AS2);
+	TIMSK2 &= ~(1<<OCIE2A);
+	
+	if ((F_CPU >= 1000000UL) && (F_CPU <= 16000000UL)) {	// prescaler set to 64
+		TCCR2B |= ((1<<CS21) | (1<<CS20));
+		TCCR2B &= ~(1<<CS22);
+		prescaler = 32.0;
+	} else if (F_CPU < 1000000UL) {	// prescaler set to 8
+		TCCR2B |= (1<<CS21);
+		TCCR2B &= ~((1<<CS22) | (1<<CS20));
+		prescaler = 8.0;
+	} else { // F_CPU > 16Mhz, prescaler set to 128
+		TCCR2B |= (1<<CS22);
+		TCCR2B &= ~((1<<CS21) | (1<<CS20));
+		prescaler = 64.0;
+	}
+#elif defined (__AVR_ATmega8__)
+	TIMSK &= ~(1<<TOIE2);
+	TCCR2 &= ~((1<<WGM21) | (1<<WGM20));
+	TIMSK &= ~(1<<OCIE2);
+	ASSR &= ~(1<<AS2);
+	
+	if ((F_CPU >= 1000000UL) && (F_CPU <= 16000000UL)) {	// prescaler set to 64
+		TCCR2 |= (1<<CS22);
+		TCCR2 &= ~((1<<CS21) | (1<<CS20));
+		prescaler = 64.0;
+	} else if (F_CPU < 1000000UL) {	// prescaler set to 8
+		TCCR2 |= (1<<CS21);
+		TCCR2 &= ~((1<<CS22) | (1<<CS20));
+		prescaler = 8.0;
+	} else { // F_CPU > 16Mhz, prescaler set to 128
+		TCCR2 |= ((1<<CS22) && (1<<CS20));
+		TCCR2 &= ~(1<<CS21);
+		prescaler = 128.0;
+	}
+#elif defined (__AVR_ATmega128__)
+	TIMSK &= ~(1<<TOIE2);
+	TCCR2 &= ~((1<<WGM21) | (1<<WGM20));
+	TIMSK &= ~(1<<OCIE2);
+	
+	if ((F_CPU >= 1000000UL) && (F_CPU <= 16000000UL)) {	// prescaler set to 64
+		TCCR2 |= ((1<<CS21) | (1<<CS20));
+		TCCR2 &= ~(1<<CS22);
+		prescaler = 64.0;
+	} else if (F_CPU < 1000000UL) {	// prescaler set to 8
+		TCCR2 |= (1<<CS21);
+		TCCR2 &= ~((1<<CS22) | (1<<CS20));
+		prescaler = 8.0;
+	} else { // F_CPU > 16Mhz, prescaler set to 256
+		TCCR2 |= (1<<CS22);
+		TCCR2 &= ~((1<<CS21) | (1<<CS20));
+		prescaler = 256.0;
+	}
+#endif
+
+	tcnt2 = 256 - (int)((float)F_CPU * 0.0005 / prescaler);
+
+    // Record whether we are in single or double buffer mode
+    displayMode = mode;
+    videoFlipPage = false;
+
+    // Point the display buffer to the first physical buffer
+    displayBuffer = &leds[0];
+
+    // If we are in single buffered mode, point the work buffer
+    // at the same physical buffer as the display buffer.  Otherwise,
+    // point it at the second physical buffer.
+    if( displayMode & DOUBLE_BUFFER ) {
+        workBuffer = &leds[1];
+    }
+    else {
+        workBuffer = displayBuffer;
+    }
+
+    // Set up the timer buffering
+    frontTimer = &timer[0];
+    backTimer = &timer[1];
+
+    videoFlipTimer = false;
+    SetBrightness(127);
+	
+    // Clear the buffer and display it
+    LedSign::Clear(0);
+    LedSign::Flip(false);
+
+    // Then start the display
+	TCNT2 = tcnt2;
+#if defined (__AVR_ATmega168__) || defined (__AVR_ATmega48__) || defined (__AVR_ATmega88__) || defined (__AVR_ATmega328P__) || (__AVR_ATmega1280__)
+	TIMSK2 |= (1<<TOIE2);
+#elif defined (__AVR_ATmega128__) || defined (__AVR_ATmega8__)
+	TIMSK |= (1<<TOIE2);
+#endif
+
+    // If we are in double-buffer mode, wait until the display flips before we
+    // return
+    if (displayMode & DOUBLE_BUFFER)
+    {
+        while (videoFlipPage) {
+            delay(1);
+        }
+    }
+
+    initialized = true;
+}
+
+
+/* -----------------------------------------------------------------  */
+/** Signal that the front and back buffers should be flipped
+ * @param blocking if true : wait for flip before returning, if false :
+ *                 return immediately.
+ */
+void LedSign::Flip(bool blocking)
+{
+    if (displayMode & DOUBLE_BUFFER)
+    {
+        // Just set the flip flag, the buffer will flip between redraws
+        videoFlipPage = true;
+
+        // If we are blocking, sit here until the page flips.
+        while (blocking && videoFlipPage) {
+            delay(1);
+        }
+    }
+}
+
+
+/* -----------------------------------------------------------------  */
+/** Clear the screen completely
+ * @param set if 1 : make all led ON, if not set or 0 : make all led OFF
+ */
+void LedSign::Clear(int set) {
+    for(int x=0;x<14;x++)  
+        for(int y=0;y<9;y++) 
+            Set(x,y,set);
+}
+
+
+/* -----------------------------------------------------------------  */
+/** Clear an horizontal line completely
+ * @param y is the y coordinate of the line to clear/light [0-8]
+ * @param set if 1 : make all led ON, if not set or 0 : make all led OFF
+ */
+void LedSign::Horizontal(int y, int set) {
+    for(int x=0;x<14;x++)  
+        Set(x,y,set);
+}
+
+
+/* -----------------------------------------------------------------  */
+/** Clear a vertical line completely
+ * @param x is the x coordinate of the line to clear/light [0-13]
+ * @param set if 1 : make all led ON, if not set or 0 : make all led OFF
+ */
+void LedSign::Vertical(int x, int set) {
+    for(int y=0;y<9;y++)  
+        Set(x,y,set);
+}
+
+
+/* -----------------------------------------------------------------  */
+/** Set : switch on and off the leds. All the position #for char in frameString:
+ * calculations are done here, so we don't need to do in the
+ * interrupt code
+ */
+void LedSign::Set(uint8_t x, uint8_t y, uint8_t c)
+{
+    uint8_t pin_high = ledMap[x+y*14].high;
+    uint8_t pin_low  = ledMap[x+y*14].low;
+    // pin_low is directly the address in the led array (minus 2 because the 
+    // first two bytes are used for RS232 communication), but
+    // as it is a two byte array we need to check pin_high also.
+    // If pin_high is bigger than 8 address has to be increased by one
+
+    uint8_t bufferNum = (pin_low-2)*2 + (pin_high / 8) + ((pin_high > 7)?24:0);
+    uint8_t work = _BV(pin_high & 0x07);
+
+    // If we aren't in grayscale mode, just map any pin brightness to max
+    if (c > 0 && !(displayMode & GRAYSCALE)) {
+        c = SHADES-1;
+    }
+
+    for (int i = 0; i < SHADES-1; i++) {
+        if( c > i ) {
+            workBuffer->pixels[i][bufferNum] |= work;   // ON
+        }
+        else {
+            workBuffer->pixels[i][bufferNum] &= ~work;   // OFF
+        }
+    }
+}
+
+
+/* Set the overall brightness of the screen
+ * @param brightness LED brightness, from 0 (off) to 127 (full on)
+ */
+
+void LedSign::SetBrightness(uint8_t brightness)
+{
+    // An exponential fit seems to approximate a (perceived) linear scale
+    float brightnessPercent = ((float)brightness / 127)*((float)brightness / 127);
+    uint8_t difference = 0;
+
+    /*   ---- This needs review! Please review. -- thilo  */
+    // set up page counts
+    // TODO: make SHADES a function parameter. This would require some refactoring.
+    int start = 15;
+    int max = 255;
+    float scale = 1.5;
+    float delta = pow( max - start , 1.0 / scale) / (SHADES - 1);
+    uint8_t pageCounts[SHADES]; 
+
+    pageCounts[0] = max - start;
+    for (uint8_t i=1; i<SHADES; i++) {
+        pageCounts[i] = max - ( pow( i * delta, scale ) + start );
+    }
+    Serial.end();
+
+    if (! initialized) {
+       // set front timer defaults
+        for (int i = 0; i < SHADES; i++) {
+            frontTimer->counts[i] = pageCounts[i];
+            // TODO: Generate this dynamically
+            frontTimer->prescaler[i] = slowPrescaler.TCCR2;
+        }
+    }
+
+    // Wait until the previous brightness request goes through
+    while( videoFlipTimer ) {
+        delay(1);
+    }
+
+    // Compute on time for each of the pages
+    // Use the fast timer; slow timer is only useful for < 3 shades.
+    for (uint8_t i = 0; i < SHADES - 1; i++) {
+        uint8_t interval = 255 - pageCounts[i];
+
+        backTimer->counts[i] = 255 -    brightnessPercent 
+                                      * interval 
+                                      * fastPrescaler.relativeSpeed;
+        backTimer->prescaler[i] = fastPrescaler.TCCR2;
+        difference += backTimer->counts[i] - pageCounts[i];
+    }
+
+    // Compute off time
+    backTimer->counts[SHADES - 1] = 255 - difference;
+    backTimer->prescaler[SHADES - 1] = slowPrescaler.TCCR2;
+
+    /*   ---- End of "This needs review! Please review." -- thilo  */
+
+    // Have the ISR update the timer registers next run
+    videoFlipTimer = true;
+}
+
+
+/* -----------------------------------------------------------------  */
+/** The Interrupt code goes here !  
+ */
+ISR(TIMER2_OVF_vect) {
+        DDRD  = 0x0;
+        DDRB  = 0x0;
+#ifdef MEASURE_ISR_TIME
+    digitalWrite(statusPIN, HIGH);
+#endif
+
+    // For each cycle, we have potential SHADES pages to display.
+    // Once every page has been displayed, then we move on to the next
+    // cycle.
+
+    // 24 Cycles of Matrix
+    static uint8_t cycle = 0;
+
+    // SHADES pages to display
+    static uint8_t page = 0;
+
+    TCCR2B = frontTimer->prescaler[page];
+    TCNT2 = frontTimer->counts[page];
+
+    if ( page < SHADES - 1) { 
+
+        if (cycle < 6) {
+            DDRD  = _BV(cycle+2) | displayBuffer->pixels[page][cycle*2];
+            PORTD =            displayBuffer->pixels[page][cycle*2];
+
+            DDRB  =            displayBuffer->pixels[page][cycle*2+1];
+            PORTB =            displayBuffer->pixels[page][cycle*2+1];
+        } else if (cycle < 12) {
+            DDRD =             displayBuffer->pixels[page][cycle*2];
+            PORTD =            displayBuffer->pixels[page][cycle*2];
+
+            DDRB  = _BV(cycle-6) | displayBuffer->pixels[page][cycle*2+1];
+            PORTB =            displayBuffer->pixels[page][cycle*2+1];      
+        } else if (cycle < 18) {
+            DDRD  = _BV(cycle+2-12) | displayBuffer->pixels[page][cycle*2];
+            PORTD =            displayBuffer->pixels[page][cycle*2];
+
+            DDRB  =            displayBuffer->pixels[page][cycle*2+1];
+            PORTB =            displayBuffer->pixels[page][cycle*2+1];
+        } else {
+            DDRD =             displayBuffer->pixels[page][cycle*2];
+            PORTD =            displayBuffer->pixels[page][cycle*2];
+
+            DDRB  = _BV(cycle-6-12) | displayBuffer->pixels[page][cycle*2+1];
+            PORTB =            displayBuffer->pixels[page][cycle*2+1];      
+        }
+    } 
+    else {
+        // Turn everything off
+        DDRD  = 0x0;
+        DDRB  = 0x0;
+    }
+
+    page++;
+
+    if (page >= SHADES) {
+        page = 0;
+        cycle++;
+    }
+
+    if (cycle > 24) {
+        cycle = 0;
+
+        // If the page should be flipped, do it here.
+        if (videoFlipPage && (displayMode & DOUBLE_BUFFER))
+        {
+            // TODO: is this an atomic operation?
+            videoFlipPage = false;
+
+            videoPage* temp = displayBuffer;
+            displayBuffer = workBuffer;
+            workBuffer = temp;
+        }
+
+        if (videoFlipTimer) {
+            videoFlipTimer = false;
+
+            tempTimer = frontTimer;
+            frontTimer = backTimer;
+            backTimer = tempTimer;
+        }
+    }
+
+#ifdef MEASURE_ISR_TIME
+    digitalWrite(statusPIN, LOW);
+#endif
+}