Update uno-stats-monitor/monitor_uno.ino

added an 8 x 8 LED matrix and IR receiver
LED shows CPU load as a bar graph
IR receiver reports key press events back through serial connection
general code cleanup

uno-stats-monitor/monitor_uno.ino

@@ -1,54 +1,136 @@
 /*
  * UNO Monitor Receiver (4-bit LCD Version)
- * kidacro@archamedis.net
+ * Kidacro <kidacro@archamedis.net>
  * 
- * Waits for input over serial connection and displays on LCD
+ * Waits for input over serial connection and displays on LCD & LED
+ * Receives IR events and reports them over serial connection to a daemon
  * 
  * Input Schema:
  *  Start char is: '#'
  *  End char is: '@'
- *  2nd char denotes which line number to use
+ *  2nd char denotes which line number/mode to use
  *  
  * Example:
  *  Line 1: #1Archamedis Status@
  *  Line 2: #299% free / etc.@
+ *  LAVG 3: #324@
  *
+ * Output Schema:
+ *  Multimedia Controls use single characters to denote which button was pressed
+ *    P power
+ *    M mute
+ *    m mode
+ *    p pause/play
+ *    b back
+ *    f forward
+ *    e eq
+ *    - vol down
+ *    + vol up
+ *    r return
+ *    u usb scan
+ *    0 number 0
+ *    1 number 1
+ *    2 number 2
+ *    3 number 3
+ *    4 number 4
+ *    5 number 5
+ *    6 number 6
+ *    7 number 7
+ *    8 number 8
+ *    9 number 9
+ *    R repeat
+ *    Z other button pressed
  */
 
-// include the library code:
 #include <LiquidCrystal.h>
+#include <LedControl.h>
+#include <IRremote.h>
 
-// LCD Pinout:
-// LCD RS pin to digital pin 12
-// LCD Enable pin to digital pin 11
-// LCD D4 pin to digital pin 5
-// LCD D5 pin to digital pin 4
-// LCD D6 pin to digital pin 3
-// LCD D7 pin to digital pin 2
-// LCD R/W pin to ground
-// LCD VSS pin to ground
-// LCD VCC pin to 5V
-// 10K resistor:
-// ends to +5V and ground
-// wiper to LCD VO pin (pin 3)
+/* LCD Pinout:
+ * LCD RS pin to digital pin 12
+ * LCD Enable pin to digital pin 11
+ * LCD D4 pin to digital pin 5
+ * LCD D5 pin to digital pin 4
+ * LCD D6 pin to digital pin 3
+ * LCD D7 pin to digital pin 2
+ * LCD R/W pin to ground
+ * LCD VSS pin to ground
+ * LCD VCC pin to 5V
+ * 10K resistor:
+ *  ends to +5V and ground
+ *  wiper to LCD VO pin (pin 3)
+*/
+
+/* LED Pinout:
+ * LED DataIn(DIN) to digital pin 10
+ * LED LOAD(CS) to digital pin 9
+ * LED CLK to digital pin 8
+ * LED VSS pin to 5V
+ * LED GND to ground
+*/
+
+/* IR Pinout
+ * IR Signal to digital pin 13
+ * IR VSS pin to 5V
+ * IR GND to ground
+*/
 
-// Variable Init
 // LCD vars
-// initialize the library by associating any needed LCD interface pin
-//  with the arduino pin number it is connected to
 const int LCDRS = 12, LCDEN = 11, LCDD4 = 5, LCDD5 = 4, LCDD6 = 3, LCDD7 = 2;
 int LCDLength = 16;
 LiquidCrystal LCD(LCDRS, LCDEN, LCDD4, LCDD5, LCDD6, LCDD7);
 
+// LED vars
+const int LEDIN = 10, LEDCS = 9, LEDCLK = 8;
+LedControl LEDlc=LedControl(LEDIN,LEDCLK,LEDCS,1);
+unsigned long LEDdelaytime1=5;
+unsigned long LEDdelaytime2=5;
+
+// IR vars
+const int IRSIG = 13;
+IRrecv Irrecv(IRSIG);
+decode_results IRresults;
+
 // Serial vars
-const byte numChars = 32;
-char receivedChars[numChars]; // an array to store the received data
-boolean newData = false;
+const byte SERnumChars = 32;
+char SERrecvChars[SERnumChars];
+boolean SERnewData = false;
 
-// Debugging (serial console must be connected)
-bool DEBUG = 1;
+// Debugging
+boolean DEBUG = false;
 
-void LcdL1(boolean wipe = false) {
+void LEDSetup(void) 
+{
+  /*
+   The MAX72XX is in power-saving mode on startup,
+   we have to do a wakeup call
+   */
+  LEDlc.shutdown(0,false);
+
+  /* Set the brightness to medium values */
+  LEDlc.setIntensity(0,8);
+
+  /* and clear the display */
+  LEDlc.clearDisplay(0);
+}
+
+void LcdSetup(void) 
+{
+  // set up the LCD's number of columns and rows:
+  LCD.begin(LCDLength, 2);
+
+  // clear
+  LCD.clear();
+}
+
+void IRSetup(void)
+{
+  // Start the receiver
+  Irrecv.enableIRIn(); 
+}
+
+void LcdL1(boolean wipe = false) 
+{
   delay(10);
   LCD.setCursor(0, 0); // Define the cursor position as the 1st position of the 1st line
 
@@ -60,7 +142,8 @@ void LcdL1(boolean wipe = false) {
   delay(10);
 }
 
-void LcdL2(boolean wipe = false) {
+void LcdL2(boolean wipe = false) 
+{
   delay(10);
   LCD.setCursor(0, 1);  // Define the cursor position as the 1st position of the 2nd line
 
@@ -72,17 +155,8 @@ void LcdL2(boolean wipe = false) {
   delay(10); 
 }
 
-void LcdCls(void) {
-  delay(10);
-  LCD.clear();  // The screen is empty
-  LcdL1(); // the cursor position is zeroed 
-  delay(10);
-}
-
-void LcdSetup(void) {
-  // set up the LCD's number of columns and rows:
-  LCD.begin(LCDLength, 2);
-  
+void LcdIntro(void)
+{
   // Print a "waiting" message to the LCD.
   LcdL1();
   LCD.print("Starting Up...");
@@ -90,14 +164,25 @@ void LcdSetup(void) {
   LCD.print("Waiting for data");
 }
 
-/* returns starting position of text
-void LcdCenter(int mylen) {
+void LcdCls(void) 
+{
+  delay(10);
+  LCD.clear(); // The screen is empty
+  LcdL1(); // the cursor position is zeroed 
+  delay(10);
+}
+
+/* 
+TODO: returns starting position of text or 0 for 1st position
+void LcdCenter(int mylen) 
+{
   int mypos = 0;
 
   return mypos;
 }*/
 
-void LcdWrite(String mymessage) {
+void LcdWrite(String mymessage) 
+{
   int i = 0;
   unsigned int mylen = mymessage.length(); 
   
@@ -127,102 +212,192 @@ void LcdWrite(String mymessage) {
   }
 }
 
-void LcdWriteExample() {
-  LcdCls();
-
-  LcdL1();
-  LcdWrite("Archamedis Stats");
-
-  delay(20);
-
-  LcdL1(true);
-  LcdWrite("4.3ghz 89% 68C");
-
-  delay(20);
-
-  LcdL2();
-  LcdWrite("Ryzen 9 5950x");
-}
-
-void recvWithStartEndMarkers() {
-    static boolean recvInProgress = false;
-    static byte ndx = 0;
-    char startMarker = '#';
-    char endMarker = '@';
-    char rc;
- 
-    while (Serial.available() > 0 && newData == false) {
-        rc = Serial.read();
-
-        if(recvInProgress == true) {
-            if(rc != endMarker) {
-                receivedChars[ndx] = rc;
-                ndx++;
-                if (ndx >= numChars) {
-                    ndx = numChars - 1;
-                }
-            }
-            else {
-                receivedChars[ndx] = '\0'; // terminate the string
-                recvInProgress = false;
-                ndx = 0;
-                newData = true;
-            }
-        }
-
-        else if(rc == startMarker) {
-            recvInProgress = true;
-        }
+void LedIntro() {
+  for(int row=0;row<8;row++) {
+    for(int col=0;col<8;col++) {
+      delay(LEDdelaytime2);
+      LEDlc.setLed(0,row,col,true);
+      delay(LEDdelaytime2);
+      for(int i=0;i<col;i++) {
+        LEDlc.setLed(0,row,col,false);
+        delay(LEDdelaytime2);
+        LEDlc.setLed(0,row,col,true);
+        delay(LEDdelaytime2);
+      }
     }
+  }
+  LEDlc.clearDisplay(0);
 }
 
-void showNewData() {
-  if(newData == true) {
+// FIXME: this is armchair math
+//        this needs to be dynamic and based on available rows
+void LedShowLoad(const char *load)
+{
+  int myload = atoi(load);
+  int segments = 0;
+
+  if(DEBUG) {
+      Serial.print("My input load: ");
+      Serial.println(load);
+      Serial.print("My calculated load: ");
+      Serial.println(myload);
+  }
+
+  LEDlc.clearDisplay(0);
+
+  if(myload <= 10) segments = 1;
+  else if(myload <= 20 && myload > 10) segments = 2;
+  else if(myload <= 30 && myload > 20) segments = 3;
+  else if(myload <= 50 && myload > 30) segments = 4;
+  else if(myload <= 60 && myload > 50) segments = 5;
+  else if(myload <= 70 && myload > 60) segments = 6;
+  else if(myload <= 85 && myload > 70) segments = 7;
+  else if(myload > 84) segments = 8;
+
+  // segments as rows
+  for(int row=0;row<8;row++) {
+    for(int col=0;col<segments;col++) {
+      delay(LEDdelaytime2);
+      LEDlc.setLed(0,row,col,true);
+      delay(LEDdelaytime2);
+      for(int i=0;i<col;i++) {
+        LEDlc.setLed(0,row,col,false);
+        delay(LEDdelaytime2);
+        LEDlc.setLed(0,row,col,true);
+        delay(LEDdelaytime2);
+      }
+    }
+  }
+}
+
+// IR translator
+void IRtranslate()
+{
+  switch(IRresults.value) {
+    case 0xFFA25D: Serial.println("P"); break; // power
+    case 0xFFE21D: Serial.println("M"); break; // mute
+    case 0xFF629D: Serial.println("m"); break; // mode
+    case 0xFF22DD: Serial.println("p"); break; // pause/play
+    case 0xFF02FD: Serial.println("b"); break; // back
+    case 0xFFC23D: Serial.println("f"); break; // forward
+    case 0xFFE01F: Serial.println("e"); break; // eq
+    case 0xFFA857: Serial.println("-"); break; // vol down
+    case 0xFF906F: Serial.println("+"); break; // vol up
+    case 0xFF9867: Serial.println("r"); break; // return
+    case 0xFFB04F: Serial.println("u"); break; // usb scan
+    case 0xFF6897: Serial.println("0"); break; // number 0
+    case 0xFF30CF: Serial.println("1"); break; // number 1
+    case 0xFF18E7: Serial.println("2"); break; // number 2
+    case 0xFF7A85: Serial.println("3"); break; // number 3
+    case 0xFF10EF: Serial.println("4"); break; // number 4
+    case 0xFF38C7: Serial.println("5"); break; // number 5
+    case 0xFF5AA5: Serial.println("6"); break; // number 6
+    case 0xFF42BD: Serial.println("7"); break; // number 7
+    case 0xFF4AB5: Serial.println("8"); break; // number 8
+    case 0xFF52AD: Serial.println("9"); break; // number 9
+    case 0xFFFFFFFF: Serial.println("R");break; // repeat
+
+    default:
+      Serial.println("Z"); // other button
+  }
+
+  // Do not get immediate repeat keypress
+  delay(500);
+}
+
+// serial/IR receive
+void SERrecv() 
+{
+  static boolean recvInProgress = false;
+  static byte ndx = 0;
+  char startMarker = '#';
+  char endMarker = '@';
+  char rc;
+
+  while (Serial.available() > 0 && SERnewData == false) {
+    // process serial signal
+    rc = Serial.read();
+
+    if(recvInProgress == true) {
+      if(rc != endMarker) {
+          SERrecvChars[ndx] = rc;
+          ndx++;
+          if (ndx >= SERnumChars) {
+              ndx = SERnumChars - 1;
+          }
+      }
+      else {
+          SERrecvChars[ndx] = '\0'; // terminate the string
+          recvInProgress = false;
+          ndx = 0;
+          SERnewData = true;
+      }
+    }
+
+    else if(rc == startMarker) {
+        recvInProgress = true;
+    }
+  }
+}
+
+// display stats on LCD and load average on LED
+void showNewData()
+{
+  if(SERnewData == true) {
     if(DEBUG) {
       Serial.print("This just in ... ");
-      Serial.println(receivedChars);
+      Serial.println(SERrecvChars);
     }
 
     // Print on line 1 or 2
     // dev: fucking c and its fixed arrays
     //      we have to define 1st character (line number) as BS and when printing, search for that BS character to skip printing that 1 character, grrr
-    if(receivedChars[0] == '1') {
+    if(SERrecvChars[0] == '1') {
       LcdL1(true);
-      receivedChars[0] = '\b';
-      LcdWrite(receivedChars);
+      SERrecvChars[0] = '\b';
+      LcdWrite(SERrecvChars);
     }
-    else if(receivedChars[0] == '2') {
+    else if(SERrecvChars[0] == '2') {
       LcdL2(true);
-      receivedChars[0] = '\b';
-      LcdWrite(receivedChars);
+      SERrecvChars[0] = '\b';
+      LcdWrite(SERrecvChars);
+    }
+    else if(SERrecvChars[0] == '3') {
+      SERrecvChars[0] = ' ';
+      LedShowLoad(SERrecvChars);
     }
     
-    newData = false;
+    SERnewData = false;
   }
 }
 
-void setup (void) {
-  // Init LCD panel
+void setup (void) 
+{
+  // init HW
   LcdSetup();
+  LEDSetup();
+  IRSetup();
 
-  // Init Debugging output
-  if(DEBUG) {
-    Serial.begin(9600);
-    while (!Serial) {
-      ; // wait for serial port to connect. Needed for native USB port only
-    }
-  }
-
-  // Init normal operation
-  else {
-    Serial.begin(9600);
-  }
+  // open serial port
+  Serial.begin(9600);
 
+  // display intros
+  LcdIntro();
+  LedIntro();
 }
 
 // main()
-void loop (void) {
-  // process input
-  recvWithStartEndMarkers();
+void loop (void) 
+{
+  //process IR signal
+  if(Irrecv.decode(&IRresults)) {
+    IRtranslate();
+    Irrecv.resume(); // receive the next value
+  }
+
+  // process serial input
+  SERrecv();
+
+  // display new data
   showNewData();
 }