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--- a5:bootloader [2018/02/05 03:57] – pinchies
+++ a5:bootloader [2018/10/18 23:08] – samuelpinches
@@ Line 1: / Line 1: @@
-===== Flashing a new bootloader on the A5 =====
+====== Flashing a new bootloader on the A5/A3S ======
 In some circumstances, a firmware flash may fail half way, which will cause the motherboard to "lose" its bootloader. The bootloader is a part of the firmware that allows the motherboard to be upgraded over USB. Without the bootloader, the firmware must be flashed using the ICSP programming port.
@@ Line 6: / Line 6: @@
-=== Flashing bootloader using Arduino UNO or Arduino MEGA===
+===== Flashing bootloader using USB Programmer =====
+The simplest process.
+  - Connect programmer to computer
+  - Connect programmer to motherboard
+  - Open Arduino IDE
+  - Select the programmer you use in the Tools -> Programmer menu
+  - Choose "Burn Bootloader" in the tools menu
+  - Go back to normal life, flashing via USB cable direct to your 3D printer.
+===== PLAN A: Flashing bootloader using Arduino UNO or Arduino MEGA - Method 1 ====
+Don't have a USB programmer lying around? Feeling like you would like to buy an arduino for future projects anyway?
+Read on...
+**You can use an Arduino as a USB programmer fairly easily!**
+Download and flash [[https://www.gammon.com.au/bootloader|this awesome arduino bootloader flasher by Nick Gammon]].
+All your pins on the MKS Gen L should be connected to the ICSP port (see first image below).
+  - Connect pin 10 on the uno to the RST on the MKS Gen L ICSP port (see image #2 for pinout)
+  - Connect MISO, MOSI, SCK, VCC, GND to the matching pins on both MKS ICSP and uno ICSP headers.
+  - Flash the bootloader sketch.
+  - Open the arduino serial monitor.
+  - You may need to choose the correct baud rate to see text correctly.
+  - Follow the prompts in the serial monitor.
+{{:a5:mks_gen_l_icsp_port.jpg?direct|}}
+{{:a5:mks_gen_l_icsp.png?direct|}}
+{{:a5:arduino-icsp.jpg?direct|}}
+===== PLAN B: Flashing bootloader using Arduino UNO or Arduino MEGA - Method 2=====
+Don't have a USB programmer lying around? Feeling like you would like to buy an arduino for future projects anyway?
+Read on...
+**You can use an Arduino as a USB programmer fairly easily!**
 Please read [[https://www.arduino.cc/en/Tutorial/ArduinoISP|this article]] first for the main guide.
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