add car supports for unsupported devices

added support for tto usecar accessory with devices normally unsupported.  You may control it via the command line.  Unsupported devices will not work using the car app.

SD_ROOT/wz_mini/bin/car_control.sh

@@ -0,0 +1,113 @@
+#!/bin/sh
+
+echo "=== CAR CONTROL over COMMAND LINE! ==="
+echo "CAR: car_control.sh"
+echo "CAR: car_control.sh constant"
+echo "CAR: car_control.sh constant low_speed"
+echo "CAR: car_control.sh low_speed"
+echo "CAR: w: forward "
+echo "CAR: d: reverse"
+echo "CAR: a: turn wheel left"
+echo "CAR: d: turn wheel right"
+echo "CAR: q: forward left"
+echo "CAR: e: forward right"
+echo "CAR: z: reverse left"
+echo "CAR: c: reverse right"
+echo "CAR: x: all stop"
+
+echo "CAR: use 1 to quit ASAP!"
+echo -e ""
+echo "Ready!"
+
+trap control_c SIGINT
+
+control_c()
+{
+	echo -ne "\xaa\x55\x43\x06\x29\x80\x80\x00\x02\x71" > /dev/ttyUSB0
+	echo "control-c KILL"
+	pkill -9 -f car_control.sh
+}
+
+#idle background loop
+while true; do
+	echo -ne "\xaa\x55\x43\x06\x29\x80\x80\x00\x02\x71" > /dev/ttyUSB0
+	#fw sends 0.2
+	sleep 0.2
+done &
+
+while true; do
+	if [ "$1" == "constant" ]; then
+		read -s -n1 -t 0.05 input
+	else
+		read -rsn1 input
+	fi
+
+if [ "$input" = "w" ]; then
+	#forward
+	if [ "$1" == "low_speed" ] || [ "$2" == "low_speed" ]; then
+		echo -ne "\xaa\x55\x43\x06\x29\x80\xca\x00\x02\xbb" > /dev/ttyUSB0
+	else
+		echo -ne "\xaa\x55\x43\x06\x29\x80\xe3\x00\x02\xd4" > /dev/ttyUSB0
+	fi
+
+elif [ "$input" = "s" ]; then
+	#reverse
+	if [ "$1" == "low_speed" ] || [ "$2" == "low_speed" ]; then
+		echo -ne "\xaa\x55\x43\x06\x29\x80\x3b\x00\x02\x2c" > /dev/ttyUSB0
+	else
+		echo -ne "\xaa\x55\x43\x06\x29\x80\x36\x00\x02\x27" > /dev/ttyUSB0
+	fi
+
+elif [ "$input" = "a" ]; then
+	#left
+	echo -ne "\xaa\x55\x43\x06\x29\x76\x81\x00\x02\x68" > /dev/ttyUSB0
+
+elif [ "$input" = "d" ]; then
+	#right
+	echo -ne "\xaa\x55\x43\x06\x29\x8a\x81\x00\x02\x7c" > /dev/ttyUSB0
+
+elif [ "$input" = "q" ]; then
+	#forward left
+	if [ "$1" == "low_speed" ] || [ "$2" == "low_speed" ]; then
+		echo -ne "\xaa\x55\x43\x06\x29\x76\xca\x00\x02\xb1" > /dev/ttyUSB0
+	else
+		echo -ne "\xaa\x55\x43\x06\x29\x76\xe3\x00\x02\xca" > /dev/ttyUSB0
+	fi
+
+elif [ "$input" = "e" ]; then
+	#forward right
+	if [ "$1" == "low_speed" ] || [ "$2" == "low_speed" ]; then
+		echo -ne "\xaa\x55\x43\x06\x29\x8a\xca\x00\x02\xc5" > /dev/ttyUSB0
+	else
+		echo -ne "\xaa\x55\x43\x06\x29\x8a\xe3\x00\x02\xde" > /dev/ttyUSB0
+	fi
+
+elif [ "$input" = "z" ]; then
+	#reverse left
+	if [ "$1" == "low_speed" ] || [ "$2" == "low_speed" ]; then
+		echo "low speed"
+		echo -ne "\xaa\x55\x43\x06\x29\x76\x3b\x00\x02\x22" > /dev/ttyUSB0
+	else
+		echo "hi speed"
+		echo -ne "\xaa\x55\x43\x06\x29\x76\x36\x00\x02\x1d" > /dev/ttyUSB0
+	fi
+
+elif [ "$input" = "c" ]; then
+	#reverse right
+	if [ "$1" == "low_speed" ] || [ "$2" == "low_speed" ]; then
+		echo -ne "\xaa\x55\x43\x06\x29\x8a\x3b\x00\x02\x36" > /dev/ttyUSB0
+	else
+		echo -ne "\xaa\x55\x43\x06\x29\x8a\x36\x00\x02\x31" > /dev/ttyUSB0
+	fi
+
+elif [ "$input" = "c" ]; then
+	echo -ne "\xaa\x55\x43\x06\x29\x80\x80\x00\x02\x71" > /dev/ttyUSB0
+
+elif [ "$input" = "1" ]; then
+	#exit
+	echo -ne "\xaa\x55\x43\x06\x29\x80\x80\x00\x02\x71" > /dev/ttyUSB0
+	pkill -9 -f car_control.sh
+	break
+
+    fi
+done

SD_ROOT/wz_mini/etc/init.d/wz_post.sh

@@ -139,7 +139,7 @@ if [[ "$DISABLE_MOTOR" == "true" ]]; then
 fi
 
 #Enable serial driver for car
-if [ -f /opt/wz_mini/tmp/.CAR ]; then
+if [ -f /opt/wz_mini/tmp/.CAR ] || [[ "$ENABLE_CAR_DRIVER" == "true"]]; then
 	modprobe cp210x
 fi
 

SD_ROOT/wz_mini/usr/bin/app.ver

@@ -1 +1 @@
-Wed Jul 13 06:14:04 PM PDT 2022
+Thu Jul 14 01:55:48 PM PDT 2022

SD_ROOT/wz_mini/wz_mini.conf

@@ -91,6 +91,7 @@ ENABLE_MP4_WRITE="false"
 NIGHT_DROP_DISABLE="false"
 DISABLE_MOTOR="false"
 ENABLE_FSCK_ON_BOOT="false"
+ENABLE_CAR_DRIVER="false"
 
 #####DEBUG#####
 #drops you to a shell via serial, doesn't load app_init.sh