diff --git a/README.md b/README.md
index a5d43bb..11039bf 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 - avrdude 6.3 doc : https://download-mirror.savannah.gnu.org/releases/avrdude/avrdude-doc-6.3.pdf
 - embedded systems : https://en.wikibooks.org/wiki/Embedded_Systems/Atmel_AVR
 
-## ex00
+## m00ex00
 
 avrdude output without flashing :
 
diff --git a/module01/ex00/Makefile b/module01/ex00/Makefile
new file mode 100644
index 0000000..56b54a5
--- /dev/null
+++ b/module01/ex00/Makefile
@@ -0,0 +1,43 @@
+# frequency of the CPU (in Hz)
+F_CPU = 16000000UL
+TARGET = main
+CC = avr-gcc
+
+AVRGCC_MCU_TYPE = atmega328p
+AVRDUDE_MCU_TYPE = m328p
+BAUD_RATE = 115200
+SERIAL_PORT = /dev/ttyUSB0
+PROGRAMMER_ID = arduino
+DUMP_ORI = ../../ressources/dump_atmega328p_ori.hex
+
+
+all: hex flash
+
+
+hex: $(TARGET).hex
+
+
+# https://gcc.gnu.org/onlinedocs/gcc/AVR-Options.html
+$(TARGET).bin: $(TARGET).c
+	$(CC) -mmcu=$(AVRGCC_MCU_TYPE) -D F_CPU=$(F_CPU) $(TARGET).c -Os -o $(TARGET).bin
+
+
+# https://linux.die.net/man/1/avr-objcopy
+$(TARGET).hex: $(TARGET).bin
+	avr-objcopy -O ihex $(TARGET).bin $(TARGET).hex
+
+
+# AVR Downloader/UploaDEr https://avrdudes.github.io/avrdude (v6.3 https://download-mirror.savannah.gnu.org/releases/avrdude/avrdude-doc-6.3.pdf)
+flash:
+	avrdude -p $(AVRDUDE_MCU_TYPE) -c $(PROGRAMMER_ID) -b $(BAUD_RATE) -P $(SERIAL_PORT) -U flash:w:$(TARGET).hex
+
+
+restore:
+	avrdude -p $(AVRDUDE_MCU_TYPE) -c $(PROGRAMMER_ID) -b $(BAUD_RATE) -P $(SERIAL_PORT) -U flash:w:$(DUMP_ORI)
+
+
+clean:
+	rm -f main.hex main.bin
+
+
+.PHONY : all clean hex flash restore
\ No newline at end of file
diff --git a/module01/ex00/main.c b/module01/ex00/main.c
new file mode 100644
index 0000000..81e0195
--- /dev/null
+++ b/module01/ex00/main.c
@@ -0,0 +1,26 @@
+#include <avr/io.h>
+#include <util/delay.h>
+
+#define SET(REGISTER, BIT)			REGISTER |= 1 << BIT
+#define CLEAR(REGISTER, BIT)		REGISTER &= ~(1 << BIT)
+#define TEST(REGISTER, BIT)			REGISTER & 1 << BIT
+#define TOGGLE(REGISTER, BIT)		REGISTER ^= 1 << BIT
+
+#define TEST_PIN(PORT, BIT)			PIN ## PORT & 1 << BIT
+#define TOGGLE_PIN(PORT, BIT)		PIN ## PORT |= 1 << BIT
+#define MODE_INPUT(PORT, BIT)		CLEAR(DDR ## PORT, BIT)
+#define MODE_OUTPUT(PORT, BIT)		SET(DDR ## PORT, BIT)
+#define IS_PIN_SET(PORT, BIT)		(TEST_PIN(PORT, BIT)) == 0
+#define IS_PIN_CLEAR(PORT, BIT)		(TEST_PIN(PORT, BIT)) == 1
+
+#define D1 0
+#define D2 1
+#define D3 2
+#define D4 4
+#define SW1 2
+#define SW2 4
+
+int main() {
+	MODE_OUTPUT(B, D1);
+	SET(PORTB, D1);
+}
\ No newline at end of file
diff --git a/ressources/fr.subject_42chips.pdf b/ressources/fr.subject_42chips_module00.pdf
similarity index 100%
rename from ressources/fr.subject_42chips.pdf
rename to ressources/fr.subject_42chips_module00.pdf
diff --git a/ressources/fr.subject_42chips_module01.pdf b/ressources/fr.subject_42chips_module01.pdf
new file mode 100644
index 0000000..6f9064a
Binary files /dev/null and b/ressources/fr.subject_42chips_module01.pdf differ