[BattOr] Make BattOr able to return firmware version.

tools/battor_agent/battor_protocol_types.h

Index: tools/battor_agent/battor_protocol_types.h
diff --git a/tools/battor_agent/battor_protocol_types.h b/tools/battor_agent/battor_protocol_types.h
index 6402b3f1d2bb14a44ee17cf89f4c7d5674e4a951..4439a041373698fa37aa750fe3c6766a1c362347 100644
--- a/tools/battor_agent/battor_protocol_types.h
+++ b/tools/battor_agent/battor_protocol_types.h
@@ -59,6 +59,8 @@ enum BattOrControlMessageType : uint8_t {
   // Tells the BattOr to send back the number of samples it's collected so far.
   // This is used for syncing the clocks between the agent and the BattOr.
   BATTOR_CONTROL_MESSAGE_TYPE_READ_SAMPLE_COUNT,
+  // Tells the BattOr to send back the git hash of the firmware.

[charliea (OOO until 10-5), 2016/10/05 20:35:16]

I'd go ahead and add the other CONTROL_TYPE enums here, also:
https://github.com/aschulm/battor/blob/master/fw/control.h

[rnephew (Reviews Here), 2016/10/06 17:10:55]

Done.

+  BATTOR_CONTROL_MESSAGE_TYPE_GET_GIT_HASH = 0x09,
 };
 
 // The gain level for the BattOr to use.