Product Info

Table Of Contents

RTL8822CE RTL8822CU RTL8822CS COB TSSI MP FLOW

Command is as below:

Step 1 :

rtwpriv wlan0 mp_setrfpath 1

//WiFi MP driver will set RF path automatically, too.

rtwpriv wlan0 7 1 a HTMCS7 1 2000 //start HW Tx

Step 2 :

1. To measure frequency error (ppm), Freq_Err.

2. Freq_Err should be limited to ±2ppm.

3. If Freq_Err is between ±2ppm, it means the Index_cry is correct.

4. If the Freq_Err is out of ±2ppm, try the algorithm below to find next index_cry_next until

Freq_Err is between ±2ppm.

index_cry_next= Index_cry -

2500

2442_ ErrFreq

Example : Set Index_cry =32, measured Freq_Err = -23.49ppm. How to find next index ?

The next index is index_cry_next= 32-

2500

2442)49.23( 

≒

Step3 :

The index_cry_next must be rounded to an integer, and use the following command to

update index:

rtwpriv wlan0 mp_phypara xcap=index_cry_next

Example :

rtwpriv wlan0 mp_phypara xcap=9 //update crystal calibration value to MP

Repeat Step2, Step3 until the measured Freq_Err is limited to ±2ppm and note down

Index_cry_ok. And Index_cry_ok should be updated to eFuse after calibration.

Step 4 : After measurement, stop HW Tx.