add board diagram

diff --git a/documents/PowerBoardControl.md b/documents/PowerBoardControl.md
index 3cca274b4794ee47200981aa4e409d23438b448b..a09057bced667baeaaa72d592bbecaf67139c85d 100644 (file)
--- a/documents/PowerBoardControl.md
+++ b/documents/PowerBoardControl.md
@@ -1,5 +1,40 @@
 # Power Board Communication
 
+## Diagram
+
+
+### Addressing
+
+    ------------------- --------- -------------------
+    |  0   1   2   3  | |       | |  0   1   2   3  |
+    |                 | |     R | |                 |
+    |        1        | |   #   | |        2        |
+    |                 | |   #   | |                 |
+    ------------------PPPPPPP   | -------------------
+    ------------------PPPPPPP   | -------------------
+    |                 | |   #   | |                 |
+    |        0        | |   #   | |        3        |
+    |                 | |     E | |                 |
+    |  3   2   1   0  | |       | |  3   2   1   0  |
+    ------------------- --------- -------------------
+
+
+### OEP Numbers
+
+    ------------------- --------- -------------------
+    |  4   5   6   7  | |       | |  8   9   A   B  |
+    |                 | |     R | |                 |
+    |        1        | |   #   | |        2        |
+    |                 | |   #   | |                 |
+    ------------------PPPPPPP   | -------------------
+    ------------------PPPPPPP   | -------------------
+    |                 | |   #   | |                 |
+    |        0        | |   #   | |        3        |
+    |                 | |     E | |                 |
+    |  3   2   1   0  | |       | |  F   E   D   C  |
+    ------------------- --------- -------------------
+
+
 ## Communication
  UART, 57600 baud, 8N1