Diff: ledSign.cpp

Revision:

0:f433ff34d66b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ledSign.cpp	Thu Jun 11 13:49:01 2015 +0000
@@ -0,0 +1,134 @@
+#include "ledSign.h"
+
+// Sign Output Pins
+
+BusOut address(p17, p18, p19, p20); // Address 0 to 16
+BusOut colour(p15, p16);            // 0 = off, 1 = red, 2 = green, 3 = orange
+
+DigitalOut abTop(p14);              // bank A or B switch for Top Row - 0 = A, 1 = B
+DigitalOut clkTop(p13);             // clock for Top Row
+DigitalOut weTop(p28);              // Write Enable for Top Row
+DigitalOut aeTop(p27);              // Address Enable for Top Row
+DigitalOut enbTop(p26);             // Enable for Top Row
+
+DigitalOut abBot(p25);              // bank A or B switch for Bottom Row - 0 = A, 1 = B
+DigitalOut clkBot(p24);             // clock for Bottom Row
+DigitalOut weBot(p23);              // Write Enable for Bottom Row
+DigitalOut aeBot(p22);              // Address Enable for Bottom Row
+DigitalOut enbBot(p21);             // Enable for Bottom Row
+
+LedSign::LedSign() {
+    address = 0;
+    colour = 0;
+    abTop = 0;
+    clkTop = 0;
+    weTop = 0;
+    aeTop = 0;
+    enbTop = 0;
+    abBot = 0;
+    clkBot = 0;
+    weBot = 0;
+    aeBot = 0;
+    enbBot = 0;
+}
+
+void LedSign::enable() {
+    enbTop = 1;
+    enbBot = 1;
+}
+
+void LedSign::disable() {
+    enbTop = 0;
+    enbBot = 0;
+}
+
+void LedSign::swapBank() {
+    (abTop) ? abTop = 0 : abTop = 1;
+    (abBot) ? abBot = 0 : abBot = 1;
+}
+
+void LedSign::writeRow(int * pointer, int wRow) {
+    if(wRow <= 15) {
+        for(int col = 0; col < 128; col++) {
+            colour = *(pointer + col);
+            clockTop();
+        }
+        
+        writeTop(wRow);
+    }
+    if(wRow >= 16) {
+        for(int col = 0; col < 128; col++) {
+            colour = *(pointer + col);
+            clockBot();
+        }
+        
+        writeBot(wRow - 16);
+    }
+}
+
+void LedSign::writeScreenColour(int newColour) {
+    colour = newColour; //set colour to write to screen
+    for (int i=0; i<128; i++) { // clock in 128 bits to turn all the LED's on
+        clockIn();
+    }
+
+    for (int i=0; i<16; i++) { //actually write them for all lines
+        writeTop(i);
+        writeBot(i);
+    }
+
+    swapBank();
+
+}
+
+//********************Private Declerations********************
+
+void LedSign::writeTop(int topAddress) {
+    address = topAddress;
+    aeTop = 1;
+    wait_us(1);
+    weTop = 1;
+    wait_us(1);
+    weTop = 0;
+    wait_us(1);
+    aeTop = 0;
+    wait_us(1);
+}
+
+void LedSign::writeBot(int botAddress) {
+    address = botAddress;
+    aeBot = 1;
+    wait_us(1);
+    weBot = 1;
+    wait_us(1);
+    weBot = 0;
+    wait_us(1);
+    aeBot = 0;
+    wait_us(1);
+}
+
+void LedSign::clockTop() {
+    wait_us(1);
+    clkTop = 1;
+    wait_us(1);
+    clkTop = 0;
+    wait_us(1);
+}
+
+void LedSign::clockBot() {
+    wait_us(1);
+    clkBot = 1;
+    wait_us(1);
+    clkBot = 0;
+    wait_us(1);
+}
+
+void LedSign::clockIn() {
+    wait_us(1);
+    clkTop = 1;
+    clkBot = 1;
+    wait_us(1);
+    clkTop = 0;
+    clkBot = 0;
+    wait_us(1);
+}
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