lab04.

download/smelko/cvicenie4.txt

+#include "funshield.h"
+
+constexpr int digit_positions = 4;
+
+void writeGlyphBitmask( byte glyph, byte pos_bitmask) {
+  digitalWrite( latch_pin, LOW);
+  shiftOut( data_pin, clock_pin, MSBFIRST, glyph);
+  shiftOut( data_pin, clock_pin, MSBFIRST, pos_bitmask);
+  digitalWrite( latch_pin, HIGH);
+}
+
+void writeGlyphR(byte glyph, int pos)
+{
+  writeGlyphBitmask(glyph, digit_muxpos[digit_positions - pos - 1]);
+}
+
+void writeGlyphL(byte glyph, int pos)
+{
+  writeGlyphBitmask(glyph, digit_muxpos[pos]);
+}
+
+void writeDigit(int n, int pos)
+{
+  writeGlyphR(digits[n], pos);
+}
+
+enum LedState {PRESSED, RELEASED};
+
+class ButtonPresser
+{
+  public:
+    ButtonPresser(int pin) {
+      pin_ = pin;
+    }
+    bool pressedOnce(bool button_pressed)
+    {
+      if (button_pressed == false) {
+        prev_state_ = RELEASED;
+        return false;
+      }
+
+      if (prev_state_ == PRESSED && button_pressed)
+        return false;
+
+      prev_state_ = PRESSED;
+      return true;
+    }
+  private:
+    LedState prev_state_ = RELEASED;
+    int pin_;
+};
+
+void setup() {
+  pinMode(latch_pin, OUTPUT);
+  pinMode(data_pin, OUTPUT);
+  pinMode(clock_pin, OUTPUT);
+}
+
+constexpr int buttons[] = { button1_pin, button2_pin, button3_pin };
+ButtonPresser pressers[] { ButtonPresser(button1_pin), ButtonPresser(button2_pin), ButtonPresser(button3_pin) };
+
+int citac = 0;
+int pozicia = 0;
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
+  if ( pressers[0].pressedOnce(!digitalRead(buttons[0])))
+    citac += 1;
+  if (pressers[1].pressedOnce(!digitalRead(buttons[1])))
+    citac += 9;
+  if (pressers[2].pressedOnce(!digitalRead(buttons[2])))
+    pozicia +=1;
+
+  pozicia %=4;
+  citac %= 10;
+
+  writeDigit(citac, pozicia);
+}

index.html

@@ -644,7 +644,7 @@ $(document).ready(function(){
 			<td class="right">14.4.2021</td>
 			<td>934 5196 8778</td>
 			<td><a class="extern" href="https://cesnet.zoom.us/j/93451968778">Join the lab - Šmelko</a></td>
-			<td>Recorded lab</td>
+			<td><a class="extern" href="https://web.microsoftstream.com/video/c8f464e7-84fc-4259-b5f3-ce26d18813c7">Recorded lab</a></td>
 		</tr>
 		<tr>
 			<td class="right">20.4.2021</td>

smelko.html

@@ -87,10 +87,10 @@
 					<span>lab04</span>
 				</a>
 			</td>
-			<td><!--<a href="http://ulita.ms.mff.cuni.cz/~zavoral/nswi170/ard-53.mp4">4.4</a>
-				&nbsp;&nbsp;<a href="http://ulita.ms.mff.cuni.cz/~zavoral/nswi170/ard-54.mp4">4.5</a>
-				&nbsp;&nbsp;Čtení ze sériové linky je pro teď nepovinné, bude se ale hodit pro pozdější úlohy
-				-->
+			<td>
+				<a href="download/smelko/cvicenie4.txt">
+					poznámky k 4. cvičeniu
+				</a>
 			</td>
 		</tr>
 		<tr>