Merge branch 'master' of https://github.com/oddwires/RPI---pico

Function Generator/README.md

@@ -1,16 +1,19 @@
-****(Work in progress)****
+# Function Generator on a RP2040. #
-# Function Generator on a Pimoroni PGA2040. #
 
-* Development + Debug environment:
+![alt text](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/work-in-progress.gif)****Work In Progress.****
-  * VSCode on Win 7
+![alt text](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/work-in-progress.gif)
-  * OpenOCD and GDB
+* TBD:
-  * Picoprobe running on PI Pico providing SWG debugger
+  * Move the display to an SPI module to free up some additional GPIO ports.
-* Direct digital synthesis (DDS) Function Generator
+  * Use the additional GPIO ports to implement a second DMA channel and add code for Lissajou figures.
+  * Port the clock code from [here](https://www.micro-examples.com/articles/index.php?title=PicOClock)
+
+* Features:
+  * Direct digital synthesis (DDS) Function Generator
   * Target device = Pimoroni PGA2040 to maximise GPIO connections
   * Nixie tube display with 170 volt SMPU
   * Digital level control
-  * 8 bit R2R Analog to Digital converter
+  * Single 8 bit R2R Digital to Analog converter
 
 ![Hardware](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/FunctionGenerator.jpg)
 
-(150Hz Sine wave + 3rd harmonic on my GEC MiniScope)
+(150Hz Sine wave + 3rd harmonic on a vintage GEC MiniScope)