Initializing the TSSI to DBM Tables

1. If this chip is a 0x4301 and the Radio ID isn't 0x2050
   1. The Idle TSSI Target is 0x34
   2. We use the B PHY Data as is
   3. Return
2. otherwise

   1. If each of the passed in paXbY (where X is 0/1 depending on the PHY type) values is neither -1 nor 0

      1. The Idle TSSI Target is the value passed in, unless that is 0 or -1 in which case you use 62.
      2. we make a table of 64 signed 8 bit values
      3. set the values in the table as detailed below in "calculating table entries".
   2. Otherwise
      1. If this is an A PHY, A PHYs require a generated TSSI to DBM table, so we force it back to uninitalized (This is an error state I think).
      2. If this is a B PHY
         1. The Idle TSSI Target is 0x34
         2. Use the B PHY Data as is
      3. If this is a G PHY
         1. The Idle TSSI Target is 0x34
         2. Use the G PHY Data as is

calculating table entries

If a table of 256 entries is being generated, then it is indexed with a signed char range ([-128..127]), otherwise it is indexed with values from [0..range-1].

First, let's defined an adjusted divide function as follows:

                 /
                 |  num/den            num<0
ad (num, den) := |
                 |  (num+den/2)/den    otherwise
                 \

For each table index 'index', generate the value as follows:

• Set M₁ to ad(16*pa1 + index * pa2, 32), M₂ to the maximum of ad(32768 + index * pa3, 256) and 1. Starting with f = 256, loop setting q to ad(f * 4096 - ad(M₂*f,16)*f, 2048), Δ to abs(q - f), and f to q. Loop until Δ is less than 2 or 16 iterations have been done. If Δ didn't come out less than 2, the table cannot be generated with the given values, return an error state.

• Set the table at the given index to the value of ad(M₁*f, 8192) clamped to a signed char ([-128,127]).

B PHY Data

G PHY Data