From 2b4d907200c9155c196556830f6ce7503aa5ec99 Mon Sep 17 00:00:00 2001
From: Djeeberjr <djeeberjr@gmail.com>
Date: Mon, 18 Oct 2021 13:30:23 +0200
Subject: [PATCH] initial commit

---
 .gitignore |   4 ++
 Makefile   |  20 ++++++++++
 main.c     | 109 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 133 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 main.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..468917c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*
+!.gitignore
+!main.c
+!Makefile
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..403e4ec
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,20 @@
+CXX=avr-gcc
+CXXFLAGS=-std=gnu99 -Os -mmcu=atmega644 -DF_CPU=10000000ul
+LDFLAGS=
+LDLIBS=
+SOURCE= main.c
+COM=/dev/ttyUSB0 #mit "lsusb" und "sudo dmesg | grep tty" herausfinden
+PLATFORM=atmega644
+BOARD=stk500
+
+all: clean build push
+clean:
+	rm -f *.elf
+	rm -f *.hex
+
+build:
+	$(CXX) $(CXXFLAGS) main.c -o main.elf
+	avr-objcopy -O ihex -j .text -j .data main.elf main.hex
+
+push: 
+	sudo avrdude -p $(PLATFORM) -c $(BOARD) -P $(COM) -U flash:w:main.hex
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..0287aa2
--- /dev/null
+++ b/main.c
@@ -0,0 +1,109 @@
+#include <stdbool.h> 
+#include <avr/io.h>
+#include <util/delay.h>
+#include <inttypes.h>
+
+#define PORT_LED PORTB
+#define PIN_SWITCH PIND
+
+bool do_round(uint8_t *seq, int len);
+void display_seq(uint8_t *seq, int len);
+bool read_input(uint8_t *seq, int len);
+
+int main(){
+    // Port B LED
+    DDRB = 0xFF;
+
+    // Port A Switch
+    DDRD = 0x00;
+
+    // Values from 0-7 representing the LED position
+    uint8_t seq[] = {4,2,4,5,1,0,3};
+
+    if (do_round(seq,7)) {
+        while (true)
+        {
+            PORT_LED = 0x55;
+            _delay_ms(250);
+            PORT_LED = 0xAA;
+            _delay_ms(250);
+        }
+    }else{
+        while (true)
+        {
+            PORT_LED = 0xF0;
+            _delay_ms(250);
+            PORT_LED = 0x0F;
+            _delay_ms(250);
+        }
+    }
+    
+}
+
+bool do_round(uint8_t *seq, int len){
+
+    for (int i = 2; i < len; i++)
+    {
+        display_seq(seq,i);
+        if (!read_input(seq,i)){
+            // Failed
+            return false;
+        }
+    }
+    return true;
+}
+
+void display_seq(uint8_t *seq, int len){
+
+    // Turn off all LEDs
+    PORT_LED = 0xFF;
+
+    _delay_ms(1000);
+
+    for (int i = 0; i < len; i++)
+    {
+        PORT_LED = (0xFF ^ (1 << seq[i] ));
+
+        _delay_ms(1000);
+
+        // Turn off LEDs
+        PORT_LED = 0xFF;
+        _delay_ms(250);
+    }
+
+
+    // Turn off all LEDs
+    PORT_LED = 0xFF;    
+}
+
+bool read_input(uint8_t *seq, int len){
+    for (int i = 0; i < len; i++)
+    {   
+        uint8_t expected = 0xFF ^ (1 << seq[i]);
+
+        bool run = true;
+        while (run)
+        {
+            uint8_t input = PIN_SWITCH;
+            if (input < 0xFF){
+                // A button is pressed
+                if (input == expected){
+                    run = false;
+
+                    // Wait for button to release
+                    while (PIN_SWITCH != 0xFF)
+                    {
+                    
+                    }
+
+                    // "debounce"
+                    _delay_ms(50);
+                    
+                }else{
+                    return false;
+                }
+            }
+        }
+    }
+    return true;
+}