Update Readme

README.md

@@ -1,11 +1,13 @@
 # Open DSO-150
 
-## Complete rewrite of DSO-150 Firmware
+Fully open source firmware for JYETECH DSO-150
+https://www.jyetech.com/Products/LcdScope/e150.php
 
+## Complete rewrite of DSO-150 Firmware
 - No longer DSO-138 compatible (Sorry...)
-- Rewritten for Atollic trueSTUDIO Yea... Real debugging)
+- Rewritten for Atollic trueSTUDIO (Yea... Real debugging)
 - Now using internal digital trigger through ADC IRQ (So trigger level can now be correlated to real voltage)
-- Lots of new features
+- Lots of new features like voltage overlay, markers, auto cal
 
 ## Features
 - Support 1 Analog and up to 3 Digital Channels
@@ -25,6 +27,7 @@
 - "loop" mode to scroll current input-values
 - AC/DC mode
 - 3K Sampling Depth
+- Buttons not blocked during sampling
 
 ## Images
 
@@ -83,11 +86,18 @@ Short-Press on the encoder button returns back to cursor mode, long press on enc
 ### Loop Mode
 In Loop mode samples will be added on the right side of the waveform. The buffer is limited to the width of the screen. (Works espcially well with voltage display enabled as voltmeter with history...)
 
+### AutoCal
+The AutoCal function recalibrates the zero-point for all gain-settings automatically. Before triggering it make sure to set the coupling switch to GND and to disconnect any singal input.
+AutoCal data well be lost after restoring the default settings.
+
+### Digital Signals
+Digital Signals can be connected to PB13/PB14/PB15. There's no protection on those ports so it better be max 3.3V logic level....
+
 ## Building Open DSO-150
 Open DSO-150 should build directly after opening the project in the free STM32 version of Atollic trueSTUDIO.
 https://atollic.com/truestudio/
 
-It should also compile under the System Workbench for STM32 after creating a new project and importing the soruce files but I haven't tried that...
+It should also compile under the System Workbench for STM32 after creating a new project and importing the source files but I haven't tried that...
 
 With an STLink V2 probe it is very easy to both program and debug the scope via the DebugWire Link.
 (I haven't tried uploading hex-files through the serial port with the STM32 Bootloader but there's no reason it shouldn't work...)