first working arduino test code for one display unit

eigener_ctrl/arduino_sketch/arduino_sketch.ino

@@ -1,206 +1,136 @@
 
-//Pin Assignments (You should change these)
-const int CLK       = 9;           //Connected to TPIC pin 13: SRCLK (aka Clock)
-const int LATCH     = 10;          //Connected to TPIC pin 12: RCLK (aka Latch/load/CS/SS...)
-const int OE        = 11;          //Connected to TPIC pin 9: OE (Output Enable)
-const int DOUT      = 12;          //Connected to TPIC pin 3: SER (aka MOSI)
+#define CLK      2          //Connected to TPIC pin 13: SRCLK (aka Clock)
+#define LATCH    3          //Connected to TPIC pin 12: RCLK (aka Latch/load/CS/SS...)
+#define DOUT     4          //Connected to TPIC pin 3: SER (aka MOSI)
+#define SEG_0   A0
+#define SEG_1   A1
+#define SEG_2   A2
+#define SEG_3   A3
+#define SEG_4   A4
+#define SEG_5   A5
+#define SEG_6   11
+#define SEG_7   12
 
-//Number Patterns (0-9)
-//***Drains 0-7 must be connected to segments A-DP respectively***
-const byte numTable[] =
-{
-  B11111100,
-  B01100000,
-  B11011010,
-  B11110010,
-  B01100110,
-  B10110110,
-  B10111110,
-  B11100000,
-  B11111110,
-  B11110110
-};
+#define FET_COUNT     8
+#define BYTE_PER_FET  6
 
-//Global Variables
-int numDevices = 1;                       //The number of x-digit display modules you plan to use
-int maxDisplays = 3;                      //The maximum displays that could be accommodated (see note 1)
-int maxDigits = 3;                        //The maximum digits you plan on displaying per display module (each SR can handle a max of 8 digits)
-int SRData[3][3];                         //The storage location for the digit information. We must specify a fixed array at compile time (see note 2)
-boolean debug = true;                     //Change to true to print messages
-int delayTime = 1000;                     //Optional (just for demonstrating multiplexing)
+volatile uint8_t data[FET_COUNT][BYTE_PER_FET];
+long dataMillis = 0;
+uint8_t dataDemoStep = 0;
 
-/*
-  Notes
-1. It is recommended to use an external power supply to avoid oversource/sinking the microcontroller
-    or if you need to power high voltage, high current displays. This code will turn on/off all segments in a digit for ***each*** display.
-    So, if using 2x 3-digit displays all displaying an 8 + DP, the max consumption will be:
-       20mA (desired forward current) * 8 (segments that are on) * 2 (displays showing identical info) = 320mA
-2. The first dimension should equal maxDisplays. The second dimension should equal the number of digits
-*/
+void setup() {
+  Serial.begin(115200);
 
-void setup()
-{
-  Serial.begin(9600);
-
-  //Set pin modes
   pinMode(CLK,OUTPUT);
   pinMode(LATCH,OUTPUT);
   pinMode(DOUT, OUTPUT);
-  pinMode(OE, OUTPUT);
+  pinMode(SEG_0, OUTPUT);
+  pinMode(SEG_1, OUTPUT);
+  pinMode(SEG_2, OUTPUT);
+  pinMode(SEG_3, OUTPUT);
+  pinMode(SEG_4, OUTPUT);
+  pinMode(SEG_5, OUTPUT);
+  pinMode(SEG_6, OUTPUT);
+  pinMode(SEG_7, OUTPUT);
 
-  //7-Segment Display Init
-  digitalWrite(OE,LOW);        //Enables SR Operation
   initializeSRData();          //Prepares SR and clears data on serial line
 
-  //Test
-  setDigit(0,0,4,true);
-  setDigit(0,1,5,true);
-  setDigit(0,2,6,true);
 }
 
-void loop()
-{
+void loop() {
+
+  if(millis() - dataMillis > 10) {
+    static uint8_t counterFet = 0;
+    static uint8_t counterDigit = 0;
+    static uint8_t counterBit = 0;
+    
+    for(int fet=0; fet<FET_COUNT; fet++) {
+      
+      for(int digit=0; digit<BYTE_PER_FET; digit++) {
+          
+        if(fet == counterFet && digit == counterDigit) {
+          data[fet][digit] = _BV(counterBit);
+        } else {
+          data[fet][digit] = 0;
+        } 
+      }
+    }
+
+    counterBit++;
+    if(counterBit > 7) {
+      counterBit = 0;
+      counterDigit++;
+
+      if(counterDigit > 5) {
+        counterFet++;
+        counterDigit = 0;
+        counterFet %= FET_COUNT;
+      }
+    }
+
+    
+
+    dataMillis = millis();
+  }
+
+  
   refreshDisplay();            //Cycles through all displays and digits
 }
 
-//==========BEGIN SR Functions==========
-void initializeSRData()
-{
-  //Display Scanner (Iterates through each display module)
-  digitalWrite(LATCH,LOW);      //Tells all SRs that uController is sending data
+void initializeSRData() {
   
-  for(int dispID = 0; dispID < maxDisplays; dispID++)
-  {   
-    //Digit Scanner (Iterates through each SR (digit) in a display module)
-    for(int digit = 0; digit < maxDigits; digit++)
-    {
-      //Clears any garbage on the serial line
-      shiftOut(DOUT,CLK,LSBFIRST,0);          //Shift out 0s to all displays
-      SRData[dispID][digit] = 0;              //Stores a 0 for each digit so its completely off
-    }
+  digitalWrite(LATCH,HIGH);      //Tells all SRs that uController is sending data
+
+  for(int digit = 0; digit < BYTE_PER_FET; digit++) {    
+    shiftOut(DOUT, CLK, LSBFIRST,0);
   }
-  digitalWrite(LATCH,HIGH);      //Tells all SRs that uController is done sending data
+  
+  digitalWrite(LATCH,LOW);      //Tells all SRs that uController is done sending data
 }
 
-void printSRData()
-{
-  if(!debug)
-    return;
 
-  Serial.println("Printing SR Data...");
 
-  //Display Scanner
-  for(int dispID = 0; dispID < maxDisplays; dispID++)
-  {   
-    Serial.print("Display # ");
-    Serial.println(dispID);
 
-    //Digit Scanner
-    for(int digit = 0; digit < maxDigits; digit++)
-    {
-      Serial.print("Digit ");
-      Serial.print(digit);
-      Serial.print(": ");
-      Serial.println(SRData[dispID][digit],BIN);
-    }
-    Serial.println();
-  }
-}
-
-void setDigit(int dispID, int digit, int value, boolean dp)
-{
-  //Parameter checker
-  if(dispID < 0 || dispID >= numDevices)
-  {
-    Serial.println("dispID OoB!");         //OoB = Out of bounds
-    return;
-  }
-
-  if(digit < 0 || digit > maxDigits)
-  {
-    Serial.println("digit OoB!");
-    return;
-  }
-
-  if(value < 0 || value > 9)
-  {
-    Serial.println("Invalid value!");
-    return;
-  }
-
-  value = numTable[value];
-
-  //Toggle dp if needed
-  if(dp)
-    value |= B00000001;          //Turns on the first binary digit (segment) using an OR bitmask
-
-  //Store the digit
-  SRData[dispID][digit] = value;
-
-  if(debug)
-    printSRData();
-}
-
-void setSegments(int dispID, int digit, byte value)
-{
-  //Parameter checker
-  if(dispID < 0 || dispID >= numDevices)
-  {
-    Serial.println("dispID OoB!");
-    return;
-  }
-
-  if(digit < 0 || digit > maxDigits)
-  {
-    Serial.println("digit OoB!");
-    return;
-  }
-
-  if(value < 0 || value > 255)
-  {
-    Serial.println("Invalid byte!");
-    return;
-  }
-
-  //Store the digit
-  SRData[dispID][digit] = value;
-
-  if(debug)
-    printSRData();
-}
-
-void clearDisplay(int dispID)
-{
+void clearDisplay(int dispID) {
   initializeSRData();
   refreshDisplay();
 }
 
-void refreshDisplay()
-{
-  //Digit Scanner
-  for(int digit = 0; digit < maxDigits; digit++)
-  {  
-    //Display Scanner
-    digitalWrite(LATCH,LOW);
-    for(int dispID = numDevices -  1; dispID >= 0; dispID--)
-    {
-      //Pre-Digit blanker (shifts out 0s to correct digits before sending segment data to desired digit)
-      for(int blanks = (maxDigits - 1 - digit); blanks > 0; blanks--)
-        shiftOut(DOUT,CLK,LSBFIRST,0);
+void refreshDisplay() {
   
-      shiftOut(DOUT,CLK,LSBFIRST,SRData[dispID][digit]);
+  for(int fet=0; fet<FET_COUNT; fet++) {
     
-      //Post-Digit blanker (shifts out 0s to remaining digits)
-      for(int blanks = digit; blanks > 0; blanks--)
-        shiftOut(DOUT,CLK,LSBFIRST,0);
+    // switch fets
+    digitalWrite(SEG_0, LOW);
+    digitalWrite(SEG_1, LOW);
+    digitalWrite(SEG_2, LOW);
+    digitalWrite(SEG_3, LOW);
+    digitalWrite(SEG_4, LOW);
+    digitalWrite(SEG_5, LOW);
+    digitalWrite(SEG_6, LOW);
+    digitalWrite(SEG_7, LOW);
+    
+    digitalWrite(LATCH, HIGH);
+    
+    for(int digit = 0; digit < BYTE_PER_FET; digit++) {
+      shiftOut(DOUT, CLK, LSBFIRST, data[fet][digit]);
     }
-    digitalWrite(LATCH,HIGH);
     
-    //Demonstrates multiplexing operation
-    delay(delayTime);
-    delayTime -= 10;
-    if(delayTime <= 0)
-      delayTime = 0;
+    digitalWrite(LATCH, LOW);
+
+    // switch fets
+    digitalWrite(SEG_0, (fet == 0) ? HIGH : LOW);
+    digitalWrite(SEG_1, (fet == 1) ? HIGH : LOW);
+    digitalWrite(SEG_2, (fet == 2) ? HIGH : LOW);
+    digitalWrite(SEG_3, (fet == 3) ? HIGH : LOW);
+    digitalWrite(SEG_4, (fet == 4) ? HIGH : LOW);
+    digitalWrite(SEG_5, (fet == 5) ? HIGH : LOW);
+    digitalWrite(SEG_6, (fet == 6) ? HIGH : LOW);
+    digitalWrite(SEG_7, (fet == 7) ? HIGH : LOW);
+    
+    delayMicroseconds(500);
+    //delay(1);
   }
 }
 
+