• 802.11
• PHY
• LP
• Calibration

Full calibration

• Clear Full calibration channel

• Perform a periodic calibration

Periodic tasks

• The periodic tasks for the LP PHY are:
• Every 15 seconds

  • Call LP PHY ACI Update

  • Call PHY TX Power Check SW

  • Call PHY Update noise sample with 1 and current channel as arguments

• Every 60 sec
  • Perform the periodic calibration routine below

Periodic Calibration

• Define a 9 element array of u16 to save filter coefficients

• Save phy_now in pub->lastcal

• Set phy_forcecal to 0

• Set full_cal to full_cal_channel != the channel in pubpi->radio_chanspec

• Set full_cal_channel to current channel

• If the MAC is not already suspended, suspend it

• Enable Bluetooth Coexistence Override

• If the PHY revision >= 2

  • Call LP PHY Save Restore Digital Filter State with arguments 1 and the filter coef array

• Read PHY register 0x4a4, mask with 0xE000, and save as tx_pwr_ctrl

• Call Set TX power control with argument 0

• Perform transmit power table I/Q LO calibration

• If the PHY revision is 0 AND tx_pwr_ctrl is non-zero

  • Perform PR 41573 workaround

• If the PHY revision >= 2 AND full_cal is not zero

  • Call LP PHY PAPD Cal TX Power

• Call Set TX power control with tx_pwr_ctrl as argument

• If PHY revision >= 2

  • Call LP PHY Save Restore Digital Filter State with arguments 0 and the filter coef array

• If the chip ID is 0x5354
  • Set iqcomp to point to the 5354 I/Q Table
  • Set size to the array size of the 5454 I/Q Table

  • Call the LP PHY RX I/Q Calibration routine with arguments iqcomp, size, 1, 1, 0, 0, and NULL as the arguments

• Otherwise

  • If the PHY revision >= 2

    • Set iqcomp to point to the Rev 2 I/Q Table
    • Set size to the array size of the Rev 2 I/Q Table
  • Otherwise
    • Set iqcomp to point to the Rev 0 I/Q Table
    • Set size to the array size of the Rev 0 I/Q Table

  • Call the LP PHY RX I/Q Calibration routine with arguments iqcomp, size, 1, 1, 0, 0, NULL

• If the MAC was not suspended prior to calibration, enable it

Each element of an I/Q table has the following structure

u8 chan; s8 c1; s8 c0;

5354 I/Q Table

Rev 2 I/Q Table

Rev 0 I/Q Table