readme edits

examples/picosoc/README.md

@@ -1,3 +1,15 @@
+# Video Notes
+
+Git repository https://github.com/mattvenn/TinyFPGA-BX/tree/master/examples/picosoc
+
+The README.md contains information on:
+
+* Information about installing the toolchains
+* Electrical wiring for the demos 
+* Precompiled firmware binaries:
+	* master - starting point
+	* ws2812 - includes ws2812 driver and serial driver
+
 # PicoSOC TinyFPGA example
 
 PicoSOC is an SOC - system on chip. It includes everything you need to 
@@ -14,10 +26,12 @@ board. This example has been modified to work with the TinyFPGA by Luke from Tin
 
 You can synthesise the demo with the [icestorm](http://www.clifford.at/icestorm/) toolchain.
 A very convient way to install the toolchain is to use [APIO](https://github.com/FPGAwars/apio)
-And then set your path to include the installed tools and copy the chipdb files:
+And then set your path to include the installed tools and copy the chipdb and yosys files:
 
 	export PATH=$PATH:~/.apio/packages/toolchain-icestorm/bin/
 	sudo cp -r ~/.apio/packages/toolchain-icestorm/share/icebox/ /usr/local/share/
+	sudo cp -r ~/.apio/packages/toolchain-icestorm/share/yosys /usr/local/share/
+
 
 You will also need tinyprog:
 
@@ -28,9 +42,8 @@ For more info on the TinyFPGA tools and setup see the TinyFPGA page: https://tin
 At this point you should be able to run make upload to synthesise the hardware and program to the TinyFPGA.
 I have precompiled the firmware.c and added the firmware.bin and hex files to the repo so you don't need GCC.
 
-If you just want to see the demos in the video, you can just switch to the serial branch
+If you just want to see the demos in the video, you can switch to the ws2812 branch
 
-	git checkout serial
 	git checkout ws2812
 
 Which should allow you to program the precompiled firmware or run the simulation without installing GCC.
@@ -46,9 +59,16 @@ What I did was:
 	sudo apt-get install autoconf automake autotools-dev curl libmpc-dev \
 		libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo \
 		gperf libtool patchutils bc zlib1g-dev git libexpat1-dev
+
 	git clone [email protected]:cliffordwolf/picorv32.git
 	cd picorv32/
 	time make -j2 build-riscv32i-tools
 	export PATH=$PATH:/opt/riscv32i/bin/
 
 Then make firmware.bin should work and you can then write your own c program or edit my demos.
+
+# Wiring for the demo
+
+* Serial TX is pin 1
+* Serial RX is pin 2
+* WS2812 data is pin 3