From 70f44bef898c9e4fecd69b47b00db5bbced20661 Mon Sep 17 00:00:00 2001
From: Andrew Kay <git@ajk.me>
Date: Mon, 23 Dec 2019 19:55:32 -0600
Subject: [PATCH] Implement INSERT_BYTE

---
 pycoax/coax/protocol.py           |  6 +++--
 pycoax/examples/13_insert_byte.py | 42 +++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 2 deletions(-)
 create mode 100755 pycoax/examples/13_insert_byte.py

diff --git a/pycoax/coax/protocol.py b/pycoax/coax/protocol.py
index f79c8aa..c2a688f 100644
--- a/pycoax/coax/protocol.py
+++ b/pycoax/coax/protocol.py
@@ -297,9 +297,11 @@ def search_backward(interface, pattern, **kwargs):
 
     _execute_write_command(interface, command_word, bytes([pattern]), **kwargs)
 
-def insert_byte(interface):
+def insert_byte(interface, byte, **kwargs):
     """Execute a INSERT_BYTE command."""
-    raise NotImplementedError
+    command_word = _pack_command_word(Command.INSERT_BYTE)
+
+    _execute_write_command(interface, command_word, bytes([byte]), **kwargs)
 
 def start_operation(interface):
     """Execute a START_OPERATION command."""
diff --git a/pycoax/examples/13_insert_byte.py b/pycoax/examples/13_insert_byte.py
new file mode 100755
index 0000000..4444b1a
--- /dev/null
+++ b/pycoax/examples/13_insert_byte.py
@@ -0,0 +1,42 @@
+#!/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, insert_byte
+
+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}')
+
+    load_address_counter_hi(interface, 0)
+    load_address_counter_lo(interface, 80)
+    write_data(interface, bytes.fromhex('a7 84 8b 8b 8e 33 00 96 8e 91 8b 83 19'))
+
+    input('Press ENTER...')
+
+    load_address_counter_hi(interface, 0)
+    load_address_counter_lo(interface, 81)
+
+    insert_byte(interface, 0xb7)
+
+    input('Press ENTER...')
+
+    load_address_counter_hi(interface, 0)
+    load_address_counter_lo(interface, 88)
+
+    insert_byte(interface, 0xb7)