Improve keypad monitor entry

src/cpu.py

@@ -27,6 +27,22 @@ km = keypad.KeyMatrix(
     column_pins = (board.P4, board.P6, board.P8, board.P9) )
 
 
+class TwoDigitHexInput:
+    def __init__(self):
+        self.digits = [0x0, 0x0]
+        self.currentDigit = 0
+        self.value = 0
+       
+    def input(self, d):
+        self.digits[self.currentDigit] = d
+        self.value = (self.digits[0] * 16) + self.digits[1]
+        print("INPUT", self.digits)
+        self.currentDigit = 0 if self.currentDigit else 1
+        
+    def clear(self):
+        self.__init__()
+        print(self.digits)
+        
 
 class CPU:
     def __init__(self):
@@ -37,10 +53,8 @@ class CPU:
         self.instruction = { 'opcode': False, 'operand': False }
         self.memory = False
         self.monitorMode = 'addressEntry' # dataEntry
-        self.monitorAddressInput = "00" # These are strings because it makes shifting digits in easier
-        self.monitorDataInput = "00"
-        self.monitorAddressDisplay = "00"
-        self.monitorDataDisplay = "00"
+        self.monitorAddressInput = TwoDigitHexInput()
+        self.monitorDataInput = TwoDigitHexInput()
 
 
     def load_memory(self, bytes):
@@ -68,7 +82,7 @@ class CPU:
         displayGroup = displayio.Group()
         board.DISPLAY.root_group = displayGroup
 
-        text = self.monitorAddressDisplay + " " + self.monitorDataDisplay
+        text = "IP " + str(self.IP) + "DATA " + str(self.memory[self.IP]) + "ACC " + str(self.acc)
         text_area = label.Label(terminalio.FONT, text=text)
         text_area.x = 10
         text_area.y = 100
@@ -99,29 +113,28 @@ class CPU:
             if btnb.value == False:
                 self.monitorMode = 'addressEntry' if self.monitorMode != 'addressEntry' else 'dataEntry'
                 print("\nENTERING", self.monitorMode, "MODE")
+                self.monitorDataInput.currentDigit = 0
+                self.monitorAddressInput.currentDigit = 0
                 time.sleep(0.5) # lazy debounce
             if btnr.value == False:
                 print("\nSINGLE STEP FROM MONITOR ADDR")
-                self.IP = int(self.monitorAddressInput, 16)
+                # self.IP = self.monitorAddressInput.value
                 self.step()
                 time.sleep(0.5) # lazy debounce
             if keypad_event and keypad_event.released:
-                new_digit_0x = hex(keypad_event.key_number)
-                new_digit = new_digit_0x[2:3]
                 if self.monitorMode == 'addressEntry':
-                    cat = self.monitorAddressInput + new_digit
-                    self.monitorAddressInput = cat[1:3]
-                    print("MA", self.monitorAddressInput)
+                    self.monitorAddressInput.input(keypad_event.key_number)
+                    self.IP = self.monitorAddressInput.value
+                    print("MA", self.IP)
                 else:
-                    cat = self.monitorDataInput + new_digit
-                    self.monitorDataInput = cat[1:3] # TODO this variable might not be necessary, huh?
-                    self.memory[int(self.monitorAddressInput, 16)] = int(self.monitorDataInput, 16)
-                    print("MD", self.monitorDataInput)
-                print("Acc", self.acc, "Addr", self.monitorAddressInput, "Data", self.memory[int(self.monitorAddressInput, 16)])
+                    self.monitorDataInput.input(keypad_event.key_number)
+                    self.memory[self.IP] = self.monitorDataInput.value
+                    print("MD", self.monitorDataInput.value)
+                    if self.monitorDataInput.currentDigit == 0: # that was the second keypress, so go to the next addresss
+                        self.IP = (self.IP + 1) % 256
+                        print("ADVANCING")
+                print("Acc", self.acc, "IP", self.IP, "Data", self.memory[self.IP], "\n")
             
-            # TODO: update data with keypad
-            # then, automatically go to next address (?)
-
 
     def step(self):
         if self.IP >= 256:
@@ -148,11 +161,12 @@ class CPU:
         t = time.time()
         while (time.time() - t) < 30:
             self.read_keys()
-            #self.print_monitor()
-            #if self.running:
-             #   self.step()
-              #  time.time.sleep(0.5)
+#             self.print_monitor()
+#             if self.running:
+#                 self.step()
+#                 time.sleep(0.5)
         print("timeout")
+        print(self.memory)
 
     def hlt(self, operand):
         self.running = False
@@ -275,7 +289,8 @@ class CPU:
 
 cpu = CPU()
 
-prog = '04 FF 04 01 14 01 00 00'
+#prog = '04 FF 04 01 14 01 00 00'
+prog = '00'
 program_bytes = bytearray.fromhex(prog.replace(" ", ""))
 # Add jmp at addr 254:
 program_with_jump = program_bytes + bytearray(254 - len(program_bytes)) + bytearray.fromhex('0600')