4 files changed, 101 insertions, 2 deletions
diff --git a/Tools/check_submodules.sh b/Tools/check_submodules.sh
index 8fd9a8f00..0c03396e7 100755
--- a/Tools/check_submodules.sh
+++ b/Tools/check_submodules.sh
@@ -1,5 +1,11 @@
 #!/bin/sh
 
+[ -n "$GIT_SUBMODULES_ARE_EVIL" ] && {
+    # GIT_SUBMODULES_ARE_EVIL is set, meaning user doesn't want submodules
+    echo "Skipping submodules. NUTTX_SRC is set to $NUTTX_SRC"
+    exit 0
+}
+
 if [ -d NuttX/nuttx ];
 	then
 	STATUSRETVAL=$(git submodule summary | grep -A20 -i "NuttX" | grep "<")
@@ -8,8 +14,10 @@ if [ -d NuttX/nuttx ];
 	else
 		echo ""
 		echo ""
-		echo "NuttX sub repo not at correct version. Try 'git submodule update'"
-		echo "or follow instructions on http://pixhawk.org/dev/git/submodules"
+		echo "   NuttX sub repo not at correct version. Try 'git submodule update'"
+		echo "   or follow instructions on http://pixhawk.org/dev/git/submodules"
+		echo ""
+		echo "   DO NOT FORGET TO RUN 'make distclean && make archives' AFTER EACH NUTTX UPDATE!"
 		echo ""
 		echo ""
 		echo "New commits required:"
diff --git a/Tools/px_uploader.py b/Tools/px_uploader.py
index 985e6ffd9..cd7884f6d 100755
--- a/Tools/px_uploader.py
+++ b/Tools/px_uploader.py
@@ -63,6 +63,7 @@ import zlib
 import base64
 import time
 import array
+import os
 
 from sys import platform as _platform
 
@@ -449,6 +450,12 @@ parser.add_argument('--baud', action="store", type=int, default=115200, help="Ba
 parser.add_argument('firmware', action="store", help="Firmware file to be uploaded")
 args = parser.parse_args()
 
+# warn people about ModemManager which interferes badly with Pixhawk
+if os.path.exists("/usr/sbin/ModemManager"):
+        print("==========================================================================================================")
+        print("WARNING: You should uninstall ModemManager as it conflicts with any non-modem serial device (like Pixhawk)")
+        print("==========================================================================================================")
+
 # Load the firmware file
 fw = firmware(args.firmware)
 print("Loaded firmware for %x,%x, waiting for the bootloader..." % (fw.property('board_id'), fw.property('board_revision')))
diff --git a/Tools/tests-host/data/fit_linear_voltage.m b/Tools/tests-host/data/fit_linear_voltage.m
new file mode 100644
index 000000000..7d0c2c27f
--- /dev/null
+++ b/Tools/tests-host/data/fit_linear_voltage.m
@@ -0,0 +1,14 @@
+close all;
+clear all;
+M = importdata('px4io_v1.3.csv');
+voltage = M.data(:, 1);
+counts = M.data(:, 2);
+plot(counts, voltage, 'b*-', 'LineWidth', 2, 'MarkerSize', 15);
+coeffs = polyfit(counts, voltage, 1);
+fittedC = linspace(min(counts), max(counts), 500);
+fittedV = polyval(coeffs, fittedC);
+hold on
+plot(fittedC, fittedV, 'r-', 'LineWidth', 3);
+
+slope = coeffs(1)
+y_intersection = coeffs(2)
diff --git a/Tools/tests-host/data/px4io_v1.3.csv b/Tools/tests-host/data/px4io_v1.3.csv
new file mode 100644
index 000000000..b41ee8f1f
--- /dev/null
+++ b/Tools/tests-host/data/px4io_v1.3.csv
@@ -0,0 +1,70 @@
+voltage, counts
+4.3, 950
+4.4, 964
+4.5, 986
+4.6, 1009
+4.7, 1032
+4.8, 1055
+4.9, 1078
+5.0, 1101
+5.2, 1124
+5.3, 1148
+5.4, 1171
+5.5, 1195
+6.0, 1304
+6.1, 1329
+6.2, 1352
+7.0, 1517
+7.1, 1540
+7.2, 1564
+7.3, 1585
+7.4, 1610
+7.5, 1636
+8.0, 1728
+8.1, 1752
+8.2, 1755
+8.3, 1798
+8.4, 1821
+9.0, 1963
+9.1, 1987
+9.3, 2010
+9.4, 2033
+10.0, 2174
+10.1, 2198
+10.2, 2221
+10.3, 2245
+10.4, 2268
+11.0, 2385
+11.1, 2409
+11.2, 2432
+11.3, 2456
+11.4, 2480
+11.5, 2502
+11.6, 2526
+11.7, 2550
+11.8, 2573
+11.9, 2597
+12.0, 2621
+12.1, 2644
+12.3, 2668
+12.4, 2692
+12.5, 2716
+12.6, 2737
+12.7, 2761
+13.0, 2832
+13.5, 2950
+13.6, 2973
+14.1, 3068
+14.2, 3091
+14.7, 3209
+15.0, 3280
+15.1, 3304
+15.5, 3374
+15.6, 3397
+15.7, 3420
+16.0, 3492
+16.1, 3514
+16.2, 3538
+16.9, 3680
+17.0, 3704
+17.1, 3728