add SD card module for logs

README.md

@@ -1,3 +1,3 @@
-Arduino Sketch for MicroController Test Board with 4-Digit-Display and one button
+Arduino Sketch for MicroController Test Board with 4-Digit-Display, one button and SD card module
 
 ![mctestboard](https://raw.githubusercontent.com/faustech/mctestboard/master/mctestboard_bb.jpg)

mctestboard.ino

@@ -1,72 +1,62 @@
-// MicroController Test Board with 4-Digit-Display and one button
+// MicroController Test Board with 4-Digit-Display, one button and SD card module
+// v0.3
 // https://github.com/faustech/mctestboard
 // License: MIT License
 
 #include <Arduino.h>
 #include <Time.h>
 #include <Thread.h>
-#include <SevenSegmentExtended.h>      // Extended TM1637 library https://github.com/bremme/arduino-tm1637
+#include <SD.h>                        // Micro SD card
+#include <SevenSegmentExtended.h>      // DisplaySetting // Extended TM1637 library https://github.com/bremme/arduino-tm1637
+const byte PIN_CLK = 2;                // DisplaySetting // Define CLK pin (for 4-Digit Display)
+const byte PIN_DIO = 3;                // DisplaySetting // Define DIO pin (for 4-Digit Display)
+bool displayOn = false;                // DisplaySetting // Boolian for store display power status
+SevenSegmentExtended display(PIN_CLK, PIN_DIO); // DisplaySetting // Display setup
 
-const byte PIN_CLK = 2;                // Define CLK pin (for 4-Digit Display)
-const byte PIN_DIO = 3;                // Define DIO pin (for 4-Digit Display)
-const byte buttonPin = 4;              // Analog PIN Button (a 10K resistor is necessary)
-const byte led = 13;                   // Default onboard LED
-long buttonPressed = 0;                // Button (PIN4) ms pressed counter
-int buttonView = 0;                    // Button (PIN4) viewing state
-long previousButtonMillis = 0;         // Button (PIN4) previous press counter
+const byte PIN_SDCS = 10;              // MicroSDcardSetting // Define SD card SPI CS PIN
+File file_log;                         // MicroSDcardSetting // File object for store log
 
-long buttonInterval = 10000;           // Interval for highlighting 4-Digit Display after pressing button
-long buttonLongPress = 2500;           // Interval for long press button action
-long buttonCheck = 200;                // Interval for checking button state
-long ledPulse = 1000;                  // Interval for LED blinking pulse
-bool displayOn = false;                // Boolian for store display power status
+const byte buttonPin = 4;              // ButtonSetting // Define button pin (a 10K resistor is necessary)
+long buttonPressed = 0;                // ButtonSetting // Button ms pressed counter
+long previousButtonMillis = 0;         // ButtonSetting // Button previous press counter
+byte buttonView = 0;                    // ButtonSetting // Button viewing state
+int buttonInterval = 10000;            // ButtonSetting // Interval for highlighting 4-Digit Display after pressing button
+int buttonLongPress = 2500;            // ButtonSetting // Interval for long press button action
+int buttonCheck = 200;                 // ButtonSetting // Interval for checking button state
 
 // Threads:
-Thread ledThread = Thread();           // Create thread for LED pulse indication
 Thread pressButtonThread = Thread();   // Create thread for button state checking
 
-SevenSegmentExtended display(PIN_CLK, PIN_DIO);
-
 void setup() {
-  Serial.begin(9600);                // initializes the Serial connection @ 9600 baud for debug
-  serStr("starting setup...");
+  Serial.begin(9600);                  // Initializes the Serial connection @ 9600 baud for debug
+  Serial.println("start");
+  display.begin();                     // DisplaySetting // Initializes the display
+  displayOn = true;                    // Display On
+  display.setBacklight(100);           // Display On - set the brightness to 100 %
+  display.print("INIT-INIT");          // Display "INIT"x2 on the display
+  pinMode(buttonPin, INPUT);           // ButtonSetting
+  pinMode(PIN_SDCS, OUTPUT);           // MicroSDcardSetting // switch SC pin to Output
+  if (!SD.begin(PIN_SDCS)) {           // MicroSDcardSetting // Initialize SD card
+    Serial.println("no_SD");
+  }
 
-  pinMode(buttonPin, INPUT);
-  display.begin();                   // Initializes the display
-  displayOn = true;
-  display.setBacklight(100);         // Set the brightness to 100 %
-  display.print("INIT-INIT");        // Display INITx2 on the display
-
-  // LED blinking thread:
-  ledThread.onRun(ledBlink);
-  ledThread.setInterval(ledPulse);   // Interval for LED blinking
   // Button state cheking thread:
   pressButtonThread.onRun(pressButton);
   pressButtonThread.setInterval(buttonCheck); // Interval for checking button pressing
 
-  display.off();
-  displayOn = false;
-  serStr("...setup finished");
+  display.off();                       // Display Off
+  displayOn = false;                   // Display Off
+  sendStr("setup_done");
 }
 
 void loop() {
   // Threads init:
-  if (ledThread.shouldRun())
-    ledThread.run();
   if (pressButtonThread.shouldRun())
     pressButtonThread.run();
 }
 
-// LED pulse blinking thread
-void ledBlink() {
-  static bool ledStatus = false;     // LED status bool
-  ledStatus = !ledStatus;            // Invert LED state
-  digitalWrite(led, ledStatus);      // Activate LED state
-}
-
 // Check button pressing thread
 void pressButton() {
-
   // Display off after buttonInterval ms slack
   unsigned long currentMillis = millis();
   if (currentMillis - previousButtonMillis > buttonInterval) {
@@ -74,12 +64,12 @@ void pressButton() {
     if (displayOn == true) {
       display.off();
       displayOn = false;
-      serStr("display off after slack");
+      sendStr("disp_off");
     }
   }
 
   if (digitalRead(buttonPin) == HIGH) {
-    serStr("button pressed");
+    sendStr("press_butt");
     buttonPressed = buttonPressed + 200;
     if (buttonPressed > buttonLongPress) {
       buttonPressed = 0;
@@ -90,10 +80,10 @@ void pressButton() {
     displayOn = true;
     if (buttonView == 0) {
       display.printTime(hour(), minute(), true);
-      serStr("time showed");
+      sendStr("show_time");
     } else if (buttonView == 1) {
       display.print("----");
-      serStr("something was showed");
+      sendStr("show_----");
     }
     if (buttonView < 1) buttonView += 1;
     else buttonView = 0;
@@ -102,16 +92,23 @@ void pressButton() {
   }
 }
 
-// Send string to serial monitor with millis() counter
-void serStr(const char* serString) {
-  long currentTime = millis();
-  String space = " ";
-  String stringToPrint = currentTime + space + serString;
+// Send string to serial monitor with millis() counter and date/time
+void sendStr(String serString) {
+  long millisTime = millis();
+  String delimiter = "|";
+  String currentTime = "";
+  currentTime = currentTime + year() + "-" + month() + "-" + day() + "-" + hour() + "-" + minute() + "-" + second();
+  String stringToPrint = millisTime + delimiter + currentTime + delimiter + serString;
   Serial.println(stringToPrint);
+  file_log = SD.open("log.txt", FILE_WRITE);
+  if (file_log) {
+    file_log.println(stringToPrint);
+    file_log.close();
+  }
 }
 
-// Send string to serial monitor with millis() counter
 void longPress() {
-  serStr("long button pressed");
-  display.print("button was pressed long time");
+  String longPressStr = "pressed_ms|";
+  sendStr(longPressStr + buttonLongPress);
+  display.print("butt_long");
 }