• PeriodicTasks

Since a lot of things with this chipset are software controlled, a bunch of things need to be done periodically.

Obvious tasks are not listed

These tasks are only done if the device is up!

Approximately Every Second

• For GPHYs

  1. Fetch the current ACI StatsCounter value and save it

  2. Average the last 8 saved ACI StatsCounter values, this is the ACI Moving Average

  3. If the current interference mode is set to Non WLAN and the PHY revision is 1

     1. Read SHM offset 0xAE (Yes, this is the StatsCounter value, but it's not used as above)

     2. If bit 0x4000 is set in PHYRegister 0x429 (Reading PHY Registers is slow, keep this state in memory)

        1. If the saved value of SHM offset 0xAE isn't 0 and the value of SHM offset 0xAE - the saved value of SHM offset 0xAE is 1501 or greater

           1. Enable the PHYRegisterLock

           2. Unset bit 0x4000 in PHYRegister 0x429

           3. Disable the PHYRegisterLock

     3. Otherwise

        1. If more than 30 seconds have passed since bit 0x4000 was unset in PHYRegister 0x429

           1. Enable the PHYRegisterLock

           2. Set bit 0x4000 in PHYRegister 0x429

           3. Disable the PHYRegisterLock

     4. Save the value of SHM offset 0xAE

  4. If the current interference mode is set to WLAN Auto

     1. If the "Do ACI" flag isn't set (see ACI Flags)

        1. SuspendMAC

        2. If the ACI Moving Average is less than 200

           1. Perform an ACI Scan

           2. If the result of the scan indicates interference

              1. Enable WLAN Manual mode as shown in InterferenceCalculation

              2. Update the ACI Start time
           3. If the result of the scan indicates no interference
              1. Delay scanning again for 20 seconds

        3. EnableMAC

     2. Otherwise, if 60 seconds have passed since the ACI Start time

        1. SuspendMAC

        2. If the ACI Moving Average is greater than 1000

           1. Perform an ACI Scan

           2. If the result of the scan doesn't show any interference

              1. Disable WLAN Manual mode as shown in InterferenceCalculation

        3. EnableMAC

Approximately Every 15 Seconds

• RecalculateTransmissionPower (FIXME: unless scanning?)

• for A PHYs (FIXME, temperature?)

Approximately Every 30 Seconds

• Update Statistics

  1. Update each StatsCounter by reading it, but ignore the returned value

  2. FIXME other stats?

Approximately Every Minute

• If HardwarePowerControl isn't enabled

  1. Mark all of the LO Control array values as unused

• If BoardFlags BFL_RSSI is set

  1. SuspendMAC

  2. Do an NRSSISlopeCalculation

  3. If this is an 0x2050 Radio with Radio Revision 8 (VCO Calibration)

     1. If the current channel is 8 or greater
        1. Set the channel to 1
     2. Otherwise
        1. Set the channel to 13
     3. Set the channel back to the current channel

  4. EnableMAC

Approximately Every 2 Minutes

• On G PHYs with revision >= 2

  1. SuspendMAC

  2. Measure the Local Oscillator

  3. EnableMAC

  4. If HardwarePowerControl is enabled

     1. Mark all of the LO Control array values as unused