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WL1837MOD: WIFI and BT enable cause "sporadic" hciattach timeout

franziskus
Expert 6706 points
Part Number: WL1837MOD

Team,

is there a dependency between enabling the WIFI part and the BT part?

My customer gets a hciattach timeout each second time when trying to enable BT when WIFI is already enabled.
The issues does not occur when WIFI is deactivated.

Thanks

  • 0
    TI__Mastermind 29250 points

    Franziskus,

    Please try the following steps when using hciattach to enable Bluetooth controller. (Note : # below represents the gpio number that is connected to the BT_EN pin and $ represents the tty port connected to HCI pins)

    echo # > /sys/class/gpio/export

echo "out" > /sys/class/gpio/gpio#/direction

echo 0 > /sys/class/gpio/gpio#/value

echo 1 > /sys/class/gpio/gpio#/value

echo 0 > /sys/class/gpio/gpio#/value

echo 1 > /sys/class/gpio/gpio#/value

hciattach /dev/tty$ texas 3000000

    This will result in two low to high transitions of BT_EN signal each time hciattach is called. Please see if this resolves the issue.

    Best regards,

    Vihang

  • 0 in reply to Vihang Parmar
    TI__Expert 6706 points

    Thank you Vihang, this answered the customer question!