Adding character map example

pycoax/examples/06_char_map.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+
+import sys
+import time
+from serial import Serial
+
+sys.path.append('..')
+
+from coax import Interface1, read_address_counter_hi, read_address_counter_lo, load_address_counter_hi, load_address_counter_lo, write_data
+
+DIGIT_MAP = [0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85]
+
+print('Opening serial port...')
+
+with Serial('/dev/ttyUSB0', 115200) as serial:
+    print('Sleeping to allow interface time to wake up...')
+
+    time.sleep(3)
+
+    interface = Interface1(serial)
+
+    print('Resetting interface...')
+
+    version = interface.reset()
+
+    print(f'Firmware version is {version}')
+
+    print('LOAD_ADDRESS_COUNTER_HI...')
+
+    load_address_counter_hi(interface, 0)
+
+    print('LOAD_ADDRESS_COUNTER_LO...')
+
+    load_address_counter_lo(interface, 80)
+
+    print('WRITE_DATA...')
+
+    buffer = b'\x00' * 3
+
+    # Header Row
+    for lo in range(16):
+        buffer += bytes([DIGIT_MAP[lo]]) + (b'\x00' * 3)
+
+    buffer += b'\x00' * 13
+
+    # Rows
+    for hi in range(16):
+        buffer += bytes([DIGIT_MAP[hi]]) + (b'\x00' * 2)
+
+        for lo in range(16):
+            buffer += bytes([(hi << 4) | lo]) + b'\x32\xc0\x00'
+
+        buffer += b'\x00' * 13
+
+    buffer += b'\x00' * 560
+
+    write_data(interface, buffer)