Update README with build instructions

README.md

@@ -7,9 +7,41 @@ The firmware and configuration file are version 5.01 of the firmware.
 
 There is a configuration file for for VESC 6 Plus in the VESC-Configuration/VESC-6-Plus-30k.xml.
 
+<h3>How firmware is built</h3>
+
+The general instructions for building the firmware are on the Vedder Github account, bottom of the page:
+https://github.com/vedderb/bldc Before building, you will need to change a parameter which tells the firmware to use the PPM port to as an output. We use that to control the steering servo.
+
+<blockquote>
+$ git clone https://github.com/vedderb/bldc.git 
+$ cd bldc
+</blockquote>
+
+Edit the file conf_general.h and change:
+<blockquote>
+#define SERVO_OUT_ENABLE       0
+</blockquote>
+to:
+<blockquote>
+#define SERVO_OUT_ENABLE       1
+</blockquote>
+then you are ready to build:
+<blockquote>
+$ make
+</blockquote>
+
+The resulting firmware file is inside the "build" directory: BLDC_4_ChibiOS.bin
+
+Typically this is renamed to VESC_servoout.bin
+
+You can then upload this to the VESC using the VESC tool.
 
 <h3>Notes</h3>
 
+<h4>November 2020</h4>
+
+* The VESC 6 MkV has been released, but the master branch has not been updated in the Vedder bldc repository.
+
 <h4>September 2020</h4>
 
 * Add firmware and configuration for the VESC MkIV, firmware version 5.01.