Lua RunCam: Add support to automatically start/stop video recording o…

…n arm/disarm

ROMFS_custom/scripts/RunCam.lua

@@ -0,0 +1,45 @@
+--[[
+    This script starts RunCam video recording on arm and stops video recording on disarm.
+    To access the camera controls the port the RunCam is connected to must be set as a scripting port.
+--]]
+
+local runcam = serial:find_serial(0)
+
+if not runcam then
+    gcs:send_text(0, "RunCam: No scripting serial port")
+    return
+end
+
+runcam:begin(115200)
+runcam:set_flow_control(0)
+
+local RUNCAM_HEADER = 0xCC
+local RCDEVICE_PROTOCOL_COMMAND_CAMERA_CONTROL = 0x01
+local RCDEVICE_PROTOCOL_SIMULATE_POWER_BTN = 0x01
+local recording = false
+
+local function send_packet(command, action)
+    local buffer = {}
+    buffer[1] = RUNCAM_HEADER
+    buffer[2] = command
+    buffer[3] = action
+    buffer[#buffer + 1] = 0xE7 -- hard coded CRC-8/DVB-S2 checksum (0xCC 0x01 0x01)
+    for i = 1, #buffer do
+        runcam:write(buffer[i])
+    end
+end
+
+function start_stop_recording()
+    if not recording and arming:is_armed() then
+        send_packet(RCDEVICE_PROTOCOL_COMMAND_CAMERA_CONTROL, RCDEVICE_PROTOCOL_SIMULATE_POWER_BTN)
+        gcs:send_text(6, 'RunCam recording started')
+        recording = true
+    elseif recording and not arming:is_armed() then
+        send_packet(RCDEVICE_PROTOCOL_COMMAND_CAMERA_CONTROL, RCDEVICE_PROTOCOL_SIMULATE_POWER_BTN)
+        gcs:send_text(6, 'RunCam recording stopped')
+        recording = false
+    end
+    return start_stop_recording, 1000
+end
+
+return start_stop_recording()

ROMFS_custom/scripts/read_and_log_hmp.lua

@@ -5,7 +5,7 @@
 --]]
 
 -- create parameter table
-local PARAM_TABLE_KEY = 73 -- parameter table key must be used by only one script on a particular flight controller, unique index value between 0 and 200
+local PARAM_TABLE_KEY = 74 -- parameter table key must be used by only one script on a particular flight controller, unique index value between 0 and 200
 local PARAM_TABLE_PREFIX = 'HMP_'
 assert(param:add_table(PARAM_TABLE_KEY, PARAM_TABLE_PREFIX, 1),
   string.format('Could not add param table %s', PARAM_TABLE_PREFIX))