scripts/bt-dev-start-rpi3.sh

   1 #!/bin/sh
   2 PATH=/bin:/usr/bin:/sbin:/usr/sbin
   3
   4 # Script for registering Broadcom UART BT device
   5 BT_UART_DEVICE=/dev/ttyAMA0
   6 BT_CHIP_TYPE=bcm43xx
   7 BT_MAC_FILE=/opt/etc/.bd_addr
   8
   9 HCI_CONFIG=/usr/bin/hciconfig
  10 HCI_ATTACH=/usr/bin/hciattach
  11
  12 if [ ! -e "$BT_UART_DEVICE" ]
  13 then
  14         mknod $BT_UART_DEVICE c 204 64
  15 fi
  16
  17 GEN_BDADDR(){
  18         #echo "BT Mac addr generates randomly."
  19         #MAC_PRE=$(echo "00:02:")
  20         #MAC_POST=$(/usr/bin/openssl rand -hex 4 | sed 's/\(..\)/\1:/g; s/.$//')
  21         #BT_MAC=$MAC_PRE$MAC_POST
  22         echo "Generates BT MAC address based on serial number."
  23         SERIAL=`cat /proc/device-tree/serial-number | cut -c9-`
  24         B1=`echo $SERIAL | cut -c3-4`
  25         B2=`echo $SERIAL | cut -c5-6`
  26         B3=`echo $SERIAL | cut -c7-8`
  27         BT_MAC=`printf b8:27:eb:%02x:%02x:%02x $((0x$B1 ^ 0xaa)) $((0x$B2 ^ 0xaa)) $((0x$B3 ^ 0xaa))`
  28 }
  29
  30 PIVERSION=`cat /proc/device-tree/model | awk '{print $3}'`
  31 PIMODEL=`cat /proc/device-tree/model | awk '{print $5}'`
  32 echo "$PIVERSION $PIMODEL"
  33
  34 if [ "$PIVERSIOM" = "3" ] && [ "$PIMODEL" = "B" ]
  35 then
  36         echo "RPI3 B model"
  37         FLOW_CONTROL=noflow
  38         UART_SPEED=460800
  39 else
  40         echo "RPI3 B+ or RPI4 model"
  41         FLOW_CONTROL=flow
  42         UART_SPEED=2000000
  43 fi
  44
  45 if [ ! -e "$BT_MAC_FILE" ]
  46 then
  47         # Set BT address
  48         GEN_BDADDR
  49         echo $BT_MAC > ${BT_MAC_FILE}
  50 else
  51         BT_MAC=$(cat ${BT_MAC_FILE})
  52 fi
  53
  54 echo $BT_MAC
  55
  56 echo "Check for Bluetooth device status"
  57 if (${HCI_CONFIG} | grep hci); then
  58         echo "Bluetooth device already exist"
  59         ${HCI_CONFIG} hci0 up
  60 else
  61         echo "Attaching Broadcom device"
  62         for ((i=0; i<2; i++))
  63         do
  64                 if ($HCI_ATTACH $BT_UART_DEVICE $BT_CHIP_TYPE $UART_SPEED $FLOW_CONTROL nosleep $BT_MAC -t 5); then
  65                         sleep 0.1
  66                         ${HCI_CONFIG} hci0 up
  67                         break
  68                 fi
  69         done
  70 fi
  71
  72 if !(${HCI_CONFIG} | grep hci); then
  73         echo "Did not attach HCI"
  74         exit 1
  75 fi
  76
  77 TIMEOUT=20
  78 for ((i=1; i<=$TIMEOUT; i++))
  79 do
  80         /bin/sleep 0.1
  81         if [ $i -eq $TIMEOUT ]
  82         then
  83                 echo "time expired happen $i"
  84                 exit 2
  85         fi
  86         if (${HCI_CONFIG} | grep UP); then
  87                 echo "Bluetooth device is made"
  88                 break
  89         fi
  90         echo "Continue...$i"
  91 done
  92
  93 exit 0