From 93e5335332743131cb429776d84e0745f2a83495 Mon Sep 17 00:00:00 2001
From: Tom Barthe <tom.barthe@ens-paris-saclay.fr>
Date: Fri, 27 Nov 2020 04:49:27 +0100
Subject: [PATCH] Ajout d'un exemple C de clignotement d'une LED

---
 Makefile | 26 ++++++++++++++++++++++++++
 led.c    | 20 ++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 Makefile
 create mode 100644 led.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ddb2760
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+AVRDUDE = avrdude
+CFLAGS = -Os -DF_CPU=16000000UL -mmcu=atmega328p 
+SERIAL = /dev/ttyACM0
+TARGET = led
+
+.PHONY: all clean flash
+
+all: $(TARGET).hex
+
+flash: $(TARGET).hex
+	$(AVRDUDE) -F -V -c arduino -p ATMEGA328P -P $(SERIAL) -b 115200 \
+	    -U flash:w:$<
+
+$(TARGET).hex: $(TARGET)
+	$(OBJCOPY) -O ihex -R .eeprom $< $@
+
+$(TARGET): $(TARGET).o
+	$(CC) $(CFLAGS) -o $@ $<
+
+$(TARGET).o: $(TARGET).c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -f $(TARGET) $(TARGET).hex $(TARGET).o
diff --git a/led.c b/led.c
new file mode 100644
index 0000000..9d2f67f
--- /dev/null
+++ b/led.c
@@ -0,0 +1,20 @@
+#include <avr/io.h>
+#include <util/delay.h>
+
+
+
+int main(void) {
+  DDRC = 0x01; // initialize port C
+
+  while (1) {
+    // LED on
+    PORTC = 0b00000001; // PC0 = High = Vcc
+    _delay_ms(500);     // wait 500 milliseconds
+
+    // LED off
+    PORTC = 0b00000000; // PC0 = Low = 0v
+    _delay_ms(500);     // wait 500 milliseconds
+  }
+
+  return 0;
+}