docs

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30be9e0f1e4e8b6b971bc223fcbd2cd41078c29d..a495f4f343bf680dd8c02abe37fbc4bb0a0f7447 100644 (file)
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ Buildbotics CNC Controller Firmware Changelog
  - Prevent cutting off distant parts of 3D path view.
  - Raised default ``latch-backoff`` to 100mm and ``zero-backoff`` to 5mm.
  - Added ``max-deviation`` option.
+ - Fixed problem with GCode boolean expression parsing.  #232.
 
 ## v0.4.11
  - Don't reset global offsets on M2.

diff --git a/docs/development.md b/docs/development.md
index 51647dc7ada56e71e0fdb0c035d2da4770139fd7..b245ecc81a426bec62a68a3c1bba8c2f99b6cdc4 100644 (file)
--- a/docs/development.md
+++ b/docs/development.md
@@ -19,6 +19,13 @@ On a Debian Linux (9.6.0 stable) system install the required packages:
 
     git clone https://github.com/buildbotics/bbctrl-firmware
 
+## Install the Linux kernel source
+
+An optimized Linux serial driver is built as part of the Buildboitcs firmwere.
+A copy of the Linux kernel source for the RaspberryPi is necessary for building
+this module.  [Download the kernel source](https://github.com/dbrgn/linux-rpi/releases/tag/raspberrypi-kernel_1.20171029-1)
+and move it to ``src/bbserial/kernel``.
+
 ## Build the Firmware
 
     cd bbctrl-firmware