klipper-dgus/lib/README

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This directory contains external library code.
The pjrc_usb_serial directory contains code from:
http://www.pjrc.com/teensy/usb_serial.html
version 1.7 (extracted on 20160605). It has been modified to compile
on recent versions of gcc. See usb_serial.patch for the modifications.
The cmsis-sam3x8e directory contains code from the Arduino project:
https://www.arduino.cc/
version 1.5.1 (extracted on 20160608). It has been modified to compile
with gcc's LTO feature. See cmsis-sam3x8e.patch for the modifications.
The hub-ctrl directory contains code from:
https://github.com/codazoda/hub-ctrl.c/
revision 42095e522859059e8a5f4ec05c1e3def01a870a9.
The pru_rpmsg directory contains code from:
https://github.com/dinuxbg/pru-gcc-examples
revision 425a42d82006cf0aa24be27b483d2f6a41607489. The code is taken
from the repo's hc-sr04-range-sensor directory. It has been modified
so that the IEP definitions compile correctly. See pru_rpmsg.patch for
the modifications.