added v2.0

07_Operating_System/01_GPIO_Test/GPIO.jack

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+../GPIO.jack

07_Operating_System/01_GPIO_Test/Makefile

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+all: jack vm asm bin sim
+
+jack:
+	../../tools/JackCompiler/JackCompiler.pyc ./
+vm:
+	../../tools/VMTranslator/VMTranslator.pyc ./
+asm:
+	../../tools/Assembler/assembler.pyc out.asm
+bin:
+	../../tools/AsciiToBin.py out.hack
+sim:
+	cp out.hack ../00_HACK/ROM.hack
+upload:
+	iceprogduino -o 64k -w out.bin
+clean:
+	rm -f *.vm *.asm *.hack *.bin *~
+
+.PHONY: all clean

07_Operating_System/01_GPIO_Test/Readme.md

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+## GPIO.jack
+
+This library provides access to `BUT` and `LED`.
+
+### GPIO-Test
+
+In the Testfolder `01_GPIO_Test` you find a minimal version of `Sys.jack` containing the init function `Sys.init()`, which is called after starting JACK-OS. `Sys.init()` is the JACK-OS version of `leds.asm`, which reads the BUT and writes the values to LED in an endless loop:
+
+```
+class Sys {
+
+    function void init() {
+        do GPIO.init(4096);
+        while (true){
+            do GPIO.writeLed(GPIO.readBut());
+        }        
+        return;
+    }
+}
+```
+
+***
+
+### Project
+
+* Implement `GPIO.jack`
+
+* Test in simulation:
+  
+  ```
+  $ cd 01_GPIO_Test
+  $ make
+  $ cd ../00_HACK
+  $ apio clean
+  $ apio sim
+  ```
+  
+  The test bench will simulate the pushing of BUT1/2. Check if the LED change accordingly.
+  
+  ![](gpio.png)
+
+* run in real hardware with HACK build at `06_IO_Devices/05_GO` (together with the bootloader). Build and upload GPIO_Test to iCE40HX1K-EVB with: 
+  
+  ```
+  $ cd 01_GPIO_Test
+  $ make
+  $ make upload
+  ```
+
+* push buttons BUT on iCE40HX1K-EVB and check the LED.

07_Operating_System/01_GPIO_Test/Readme.md.backup

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+## GPIO.jack
+This library provides access to `BUT` and `LED`.
+### function void init(int addr)
+Initialize LED (addr) and BUT (addr+1).
+### function int readLed()
+Returns the value of LED.
+### function void writeLed(int c)
+Write c to LED.
+### function int readBut()
+Returns the state of BUT.
+
+***
+## Project
+In the Testfolder `01_GPIO_Test` you find a minimal version of `Sys.jack` containing the init function `Sys.init()`, which is called after starting JACK-OS. `Sys.init()` is the JACK-OS version of `leds.asm`, which reads the BUT and writes the values to LED in an endless loop:
+
+```
+class Sys {
+
+    function void init() {
+		do GPIO.init(4096);
+		while (true){
+			do GPIO.writeLed(GPIO.readBut());
+		}		
+		return;
+	}
+}
+
+```
+* Implement `GPIO.jack`
+* Test in simulation:
+```
+$ cd 01_GPIO_Test
+$ make
+$ cd ../00_HACK
+$ apio clean
+$ apio sim
+```
+The test bench will simulate the pushing of BUT1/2. Check if the LED change accordingly.
+
+![](gpio.png)
+
+* run in real hardware with HACK build at `06_IO_Devices/05_GO` (together with the bootloader). Build and upload GPIO_Test to iCE40HX1K-EVB with: 
+```
+$ cd 01_GPIO_Test
+$ make
+$ make upload
+```
+
+* push buttons BUT on iCE40HX1K-EVB and check the LED.

07_Operating_System/01_GPIO_Test/Sys.jack

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+/**
+ * A library that supports various program execution services.
+ */
+class Sys {
+
+    /** Performs all the initializations required by the OS. */
+    function void init() {
+		do GPIO.init(4096);
+		while (true){
+			do GPIO.writeLed(GPIO.readBut());
+		}
+		return;
+	}
+
+}