What is an Emulator?
-
-
+ 
+ What is an Emulator?
+
What is an Emulator?
-
Whole-System Emulator
@@ -190,24 +192,17 @@Transparent Emulator
-
-
- HyperV
- WSL2/Docker
- qemu on Linux
- Rosetta on Mac
Debugger/Emulator
--
-
- FCEUX (Nintendo Entertainment System) -
- Dolphin (Wii / Gamecube) -
Renode Is All of These
+Renode Is Many of These
- Console: Able to present an interactive environment
- Transparent: Can run in CI via Robot commands @@ -217,6 +212,20 @@
What is a Computer?
+
+ What is a Computer?
+-
+
- A system of devices +
- One or more CPU +
- One or more buses +
- One or more blocks of memory +
- Some I/O +
What is a Computer?
@@ -269,6 +278,128 @@
That's Nice, but What About...
+-
+
- Loading firmware? +
- Adding peripherals? +
What is "Firmware"?
+Firmware is a series of instructions executed by the CPU in + order to accomplish a task+
Firmware is Memory+
Loading Firmware in Renode
+
+ sysbus LoadELF @firmware.elf
+
+ sysbus LoadBinary @rom.bin 0x20000000
+
+ sysbus LoadSymbolsFrom @rom.elf
+ How does Renode Interact With $VENDOR_TOOL?
+-
+
- Hopefully your vendor tool produces ELF files +
- At the end of the day, it's all bytes. Just use
LoadBinary! +
+
What About Boot ROMs?
+-
+
- Initialize peripherals +
- Check for boot override +
- Check for low-power state +
- Load firmware into RAM +
- Validate firmware +
- Jump to loaded program +
+ sysbus.cpu VectorTableOffset 0x20000000
+ sysbus.cpu PC 0x20000c00
+ What about New Peripherals?
+It's All About Small Victories
+-
+
- Serial ports are super rewarding +
- They're also usually simple! +
- They are easy to script +
Reusing an Existing Port
+Steps to Set Up a Serial Port
+-
+
- Enable peripheral +
- Set up clock +
- Mux GPIOs +
- Calculate baud rate +
- Write to UART TX register +
Steps to Set Up a Serial Port
+
+ Steps to Set Up a Serial Port
+-
+
- Interrupt Support +
- DMA +
Example Serial Port
+
+ {(long)Registers.RxTx, new DoubleWordRegister(this)
+ .WithValueField(0, 8,
+ writeCallback: (_, value) => {
+ this.TransmitCharacter((byte)value);
+ },
+ valueProviderCallback: _ => {
+ if(!TryGetCharacter(out var character))
+ {
+ this.Log(LogLevel.Warning, "Empty Rx FIFO.");
+ }
+ return character;
+ })
+ },
+ What about Missing Definitions?
+-
+
- Most registers are unused +
- Most writes can be ignored +
Advantages of Emulation
+
+ Advantages of Emulation
+
+ What is "Firmware"?
-How does this interact with $VENDOR_TOOL?
-What about boot ROMs?
-What about missing registers?
--
-
- Very few projects use built-in blocks -
It's All About Small Victories
--
-
- Serial ports are super rewarding -
- They're also usually simple! -
- They are easy to script -
Steps to Set Up a Serial Port
--
-
- Enable peripheral -
- Set up clock -
- Mux GPIOs -
- Calculate baud rate -
- Write to UART TX register -
Steps to Set Up a Serial Port
-
- Advantages of Emulation
-
- Advantages of Emulation
-
- Steps to Set Up a Serial Port
--
-
- Interrupt Support -
- DMA -
Example Serial Port
-
- {(long)Registers.RxTx, new DoubleWordRegister(this)
- .WithValueField(0, 8,
- writeCallback: (_, value) => {
- this.TransmitCharacter((byte)value);
- },
- valueProviderCallback: _ => {
- if(!TryGetCharacter(out var character))
- {
- this.Log(LogLevel.Warning, "Empty Rx FIFO.");
- }
- return character;
- })
- },
- Robot Framework: Running Tests in CI
diff --git a/media/DEC_VT100_terminal_cropped.jpg b/media/DEC_VT100_terminal_cropped.jpg
new file mode 100644
index 0000000..b9a609f
Binary files /dev/null and b/media/DEC_VT100_terminal_cropped.jpg differ