src/blunderboard/__init__.py

@@ -1,2 +1,6 @@
+from blunderboard.boardreader import BoardReader
+
+
 def main():
-    pass
+    reader = BoardReader()
+    reader.scan()

src/blunderboard/boardreader.py

@@ -0,0 +1,40 @@
+import RPi.GPIO as gpio
+
+
+class BoardReader:
+    default_gpio_mode = gpio.BCM
+    default_row_gpios = [4, 5, 6, 12, 13, 16, 17, 19]
+    default_column_gpios = [20, 21, 22, 23, 24, 25, 26, 27]
+
+    def __init__(
+        self,
+        rows=default_row_gpios,
+        columns=default_column_gpios,
+        gpio_mode=default_gpio_mode,
+    ):
+        gpio.setmode(gpio_mode)
+        gpio.setup(columns, gpio.IN, pull_up_down=gpio.PUD_DOWN)
+        gpio.setup(rows, gpio.OUT, initial=gpio.LOW)
+        self.columns = columns
+        self.rows = rows
+
+    def __del__(self):
+        gpio.cleanup()
+
+    def scan(self) -> None:
+        print("  a b c d e f g h")
+        print(" +---------------+")
+        for i, row in enumerate(self.rows):
+            print("%d|" % (i + 1), end="")
+            gpio.output(row, gpio.HIGH)
+            for j, column in enumerate(self.columns):
+                if gpio.input(column):
+                    print("x", end="")
+                else:
+                    print(" ", end="")
+                if j == 7:
+                    print("|", end="")
+                else:
+                    print(" ", end="")
+            gpio.output(row, gpio.LOW)
+            print("")