wasp: simulator: First steps towards a simulator

Currently this just traces SPI activity from the ST7789 driver but its
a good baseline to start building up test functions from.

Makefile

@@ -53,5 +53,10 @@ debug:
 		-ex "attach 1" \
 		-ex "load"
 
+sim:
+	PYTHONDONTWRITEBYTECODE=1 \
+	PYTHONPATH=$(PWD)/wasp/boards/simulator:$(PWD)/wasp \
+	python3 -i wasp/boot.py
+
 .PHONY: bootloader micropython
 

wasp/boards/simulator/machine.py

@@ -0,0 +1,54 @@
+class Tracer(object):
+    def __init__(self, *args, **kwargs):
+        print(f'{self.__class__.__name__}.__init__{args} {kwargs}')
+
+    def __getattr__(self, name):
+        if name.upper() == name:
+            return name
+        return lambda *args, **kwargs: print(f'{self.__class__.__name__}.{name}{args} {kwargs}')
+
+class ADC(Tracer):
+    pass
+
+class Pin(object):
+    IN = 'IN'
+    OUT = 'OUT'
+
+    def __init__(self, id, direction, value=1):
+        self._id = id
+        self._value = 0
+
+    def init(self, d, value):
+        self.value(value)
+
+    def on(self):
+        self.value(1)
+
+    def off(self):
+        self.value(0)
+
+    def value(self, v=None):
+        if v is None:
+            return self._value
+        if v:
+            print(self._id + ": on")
+            self._value = False
+        else:
+            print(self._id + ": off")
+            self._value = True
+
+    def __call__(self, v=None):
+        self.value(v)
+
+class PWM(Tracer):
+    FREQ_16MHZ = 'FREQ_16MHZ'
+
+class SPI(object):
+    def __init__(self, id):
+        self._id = id
+
+    def init(self, baudrate=1000000,  polarity=0, phase=0, bits=8, sck=None, mosi=None, miso=None):
+        pass
+
+    def write(self, buf):
+        print("Sending data: " + str(buf))

wasp/boards/simulator/micropython.py

@@ -0,0 +1,5 @@
+def const(x):
+    return x
+
+def native(x):
+    return x

wasp/boards/simulator/watch.py

@@ -0,0 +1,26 @@
+import time
+def sleep_ms(ms):
+    time.sleep(ms / 1000)
+time.sleep_ms = sleep_ms
+
+from machine import Pin
+from machine import SPI
+
+from drivers.st7789 import ST7789_SPI
+from drivers.vibrator import Vibrator
+
+class Display(ST7789_SPI):
+    def __init__(self):
+        spi = SPI(0)
+        # Mode 3, maximum clock speed!
+        spi.init(polarity=1, phase=1, baudrate=8000000)
+    
+        # Configure the display
+        cs = Pin("DISP_CS", Pin.OUT)
+        dc = Pin("DISP_DC", Pin.OUT)
+        rst = Pin("DISP_RST", Pin.OUT)
+
+        super().__init__(240, 240, spi, cs=cs, dc=dc, res=rst)
+
+display = Display()
+vibrator = Vibrator(Pin('MOTOR', Pin.OUT, value=0), active_low=True)

wasp/drivers/st7789.py

@@ -1,5 +1,7 @@
 # MicroPython ST7789 display driver, currently only has an SPI interface
 
+import micropython
+
 from micropython import const
 from time import sleep_ms