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--- composants:attiny85 [2019/08/12 19:57] – created mh
+++ composants:attiny85 [2020/06/01 16:35] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
 {{composants:attiny85-pins.jpg}}
+===== Programming ======
+You need an Arduino to act as ISP to flash programs to the ATtiny.
+Also, the ATtiny85 runs by default at 1MHz so if you want it to run at 8MHz you need to burn the bootloader into it after having selected the appropriate frequency.
+<WRAP info round 95>
+**Note :** Arduino in the past did not support ATtiny by default and additional libs had to be provided.
+Sooner or later this might not be the case anymore.
+</WRAP>
+The Arduino UNO should be flashed with the ISP program : File > Examples > ArduinoISP
+==== Wiring ====
+{{composants:programming-attiny85.jpg?480}}
+//**Note : **The SCK, MISO and MOSI pins can be directly wired to the Arduino's ICSP/SPI header pins. There is a 10μF electrolytic capacitor between RESET and GND (anode in GND) to avoid being auto-reset when we flash programs to the ATtiny//
+Set Arduino to ISP, usually located in the IDE in Tools > Programmer > Arduino as ISP
+You can add Heartbeat, Error, Programming LEDs (choose your colors) respectively on 9, 8, 7.
+===== Ressources =====
+  *[[https://forum.arduino.cc/index.php?topic=342977.0|Forum post on the 'avrdude: stk500_initialize(): (b) protocol error, expect=0x10, resp=0x01' error. Possibly related to the absence of a capacitor between RESET and GND on linux]]
+  *[[https://create.arduino.cc/projecthub/arjun/programming-attiny85-with-arduino-uno-afb829|Basic programming tutorial]]
+  *[[https://www.re-innovation.co.uk/docs/sleep-modes-on-attiny85/|Sleep Mode tutorial]]