Differences

This shows you the differences between two versions of the page.

--- projects:crazyflie:firmware:log [2012-10-07 14:18]
arnaud
+++ projects:crazyflie:firmware:log [2012-10-08 07:05]
arnaud [Log control]
@@ Line 5: / Line 5: @@
 This mechanism is used both for regular log operation (ie. user requested log to inspect and debug flight data) but also to update indication in the GUI application.
-Each variable to log is contained in a
+Each variable to log is contained in a group group and has a name. The system is designed to make it easy to add a log variable in the Firmware and have it available in the ground station GUI:
+{{:projects:crazyflie:firmware:logmagic.png?800|}}
 ===== Communication protocol =====
@@ Line 12: / Line 14: @@
 ^ **Port**  ^ **Channel** ^ **Function**      ^
-|   5       |    0        | [[comm_protocol#table_of_content_access|Table of content access]] |
+|   5       |    0        | Table of content access |
-|   5       |    1        | [[comm_protocol#log_settings_access| Log settings access]] |
+|   5       |    1        | Log control |
-|   5       |    2        | [[comm_protocol#log_data_access|Log data access]] |
+|   5       |    2        | Log data |
 ==== Table of content access ====
@@ Line 38: / Line 40: @@
 Answer (Copter to PC):
+        +--------------+----+
+        | GET_ITEM (0) | ID |                                        If index out of range
         +--------------+----+------+------------+--------------+
-        | GET_ITEM (0) | ID | Type |   Group    |     Name     |
+        | GET_ITEM (0) | ID | Type |   Group    |     Name     |     If returning Item
         +--------------+----+------+------------+--------------+
 Length        1          1     1    < Null terminated strings >
@@ Line 53: / Line 57: @@
 | Group          | Null-terminated string containing variable group |
 | Name           | Null-terminated string containing the variable name |
+Type, group and name are not sent if the required ID is higher than TOC_LEN-1.
 === Get Info ===
@@ Line 81: / Line 87: @@
 | LOG_MAX_PACKET | Maximum number of log packets that can be programmed in the copter |
 | LOG_MAX_OPS    | Maximum number of operation programmable in the copter. An operation is one log variable retrieval programming |
+==== Log control ====
+The log control channel permits to setup, activate, deactivate and remove log packets. Like the TOC access channel the first data byte represents a command.
+^ Control command byte ^ Command       ^ Operation ^
+|                    0 | CREATE_BLOCK  | Create a new log block |
+|                    1 | APPEND_BLOCK  | Append variables to an existing block |
+|                    2 | DELETE_BLOCK  | Delete log block |
+|                    3 | START_BLOCK   | Enable log block transmition |
+|                    4 | STOP_BLOCK    | Disable log block transmition |

Bitcraze Wiki

User Tools

Site Tools

Differences

Page Tools