diff --git a/app/userapp_ranking.c b/app/userapp_ranking.c
index abe3f12d..3a33d83e 100644
--- a/app/userapp_ranking.c
+++ b/app/userapp_ranking.c
@@ -39,15 +39,6 @@ static void ResetRSSI() {
     BK4819_WriteRegister(BK4819_REG_30, Reg);
 }
 
-
-uint8_t GetRssi() {
-    SYSTICK_DelayUs(10);
-    int32_t rssi = (BK4819_GetRSSI() >> 1);
-    rssi -= 160;
-    rssi *= (-1);
-    return rssi & 0xFF;
-}
-
 void setF(uint32_t f) {
     BK4819_PickRXFilterPathBasedOnFrequency(f);
     BK4819_SetFrequency(f);
@@ -74,7 +65,10 @@ void USERAPP_ranking_readChannelFreq(uint8_t rssi_val[200]) {
         ResetRSSI();
         SYSTEM_DelayMs(10);
 
-        rssi_val[channel] = GetRssi();
+        int32_t rssi = (BK4819_GetRSSI() >> 1);
+        rssi -= 160;
+        rssi *= (-1);
+        rssi_val[channel] = rssi & 0xFF;
 
         USERAPPS_ranking_progress(channel / 2);
 
diff --git a/driver/bk4819-regs.h b/driver/bk4819-regs.h
index b7c2401c..6f9d2359 100644
--- a/driver/bk4819-regs.h
+++ b/driver/bk4819-regs.h
@@ -18,78 +18,499 @@
 #define BK4819_REGS_H
 
 enum BK4819_REGISTER_t {
-	BK4819_REG_00 = 0x00U,
-	BK4819_REG_02 = 0x02U,
-	BK4819_REG_06 = 0x06U,
-	BK4819_REG_07 = 0x07U,
-	BK4819_REG_08 = 0x08U,
-	BK4819_REG_09 = 0x09U,
-	BK4819_REG_0B = 0x0BU,
-	BK4819_REG_0C = 0x0CU,
-	BK4819_REG_0D = 0x0DU,
-	BK4819_REG_0E = 0x0EU,
-	BK4819_REG_10 = 0x10U,
-	BK4819_REG_11 = 0x11U,
-	BK4819_REG_12 = 0x12U,
-	BK4819_REG_13 = 0x13U,
-	BK4819_REG_14 = 0x14U,
-	BK4819_REG_19 = 0x19U,
-	BK4819_REG_1F = 0x1FU,
-	BK4819_REG_20 = 0x20U,
-	BK4819_REG_21 = 0x21U,
-	BK4819_REG_24 = 0x24U,
-	BK4819_REG_28 = 0x28U,
-	BK4819_REG_29 = 0x29U,
-	BK4819_REG_2B = 0x2BU,
-	BK4819_REG_30 = 0x30U,
-	BK4819_REG_31 = 0x31U,
-	BK4819_REG_32 = 0x32U,
-	BK4819_REG_33 = 0x33U,
-	BK4819_REG_36 = 0x36U,
-	BK4819_REG_37 = 0x37U,
-	BK4819_REG_38 = 0x38U,
-	BK4819_REG_39 = 0x39U,
-	BK4819_REG_3A = 0x3AU,
-	BK4819_REG_3B = 0x3BU,
-	BK4819_REG_3C = 0x3CU,
-	BK4819_REG_3E = 0x3EU,
-	BK4819_REG_3F = 0x3FU,
-	BK4819_REG_43 = 0x43U,
-	BK4819_REG_46 = 0x46U,
-	BK4819_REG_47 = 0x47U,
-	BK4819_REG_48 = 0x48U,
-	BK4819_REG_49 = 0x49U,
-	BK4819_REG_4D = 0x4DU,
-	BK4819_REG_4E = 0x4EU,
-	BK4819_REG_4F = 0x4FU,
-	BK4819_REG_50 = 0x50U,
-	BK4819_REG_51 = 0x51U,
-	BK4819_REG_52 = 0x52U,
-	BK4819_REG_58 = 0x58U,
-	BK4819_REG_59 = 0x59U,
-	BK4819_REG_5A = 0x5AU,
-	BK4819_REG_5B = 0x5BU,
-	BK4819_REG_5C = 0x5CU,
-	BK4819_REG_5D = 0x5DU,
-	BK4819_REG_5F = 0x5FU,
-	BK4819_REG_63 = 0x63U,
-	BK4819_REG_64 = 0x64U,
-	BK4819_REG_65 = 0x65U,
-	BK4819_REG_67 = 0x67U,
-	BK4819_REG_68 = 0x68U,
-	BK4819_REG_69 = 0x69U,
-	BK4819_REG_6A = 0x6AU,
-	BK4819_REG_6F = 0x6FU,
-	BK4819_REG_70 = 0x70U,
-	BK4819_REG_71 = 0x71U,
-	BK4819_REG_72 = 0x72U,
-	BK4819_REG_78 = 0x78U,
-	BK4819_REG_79 = 0x79U,
-	BK4819_REG_7A = 0x7AU,
-	BK4819_REG_7B = 0x7BU,
-	BK4819_REG_7C = 0x7CU,
-	BK4819_REG_7D = 0x7DU,
-	BK4819_REG_7E = 0x7EU,
+    //! Soft Reset
+    /*! 1=Reset; 0=Normal */
+    BK4819_REG_00 = 0x00U,
+    /*!\<15> FSK Tx Finished Interrupt.\n
+    \<14> FSK FIFO Almost Empty Interrupt Enable.\n
+    \<13> FSK Rx Finished Interrupt Enable.\n
+    \<12> FSK FIFO Almost FullInterrupt.\n
+    \<11> DTMF/5TONE Found Interrupt.\n
+    \<10> CTCSS/CDCSSTail Found Interrupt.\n
+    \<9> CDCSS Found Interrupt.\n
+    \<8> CDCSS Lost Interrupt.\n
+    \<7> CTCSS Found Interrupt.\n
+    \<6> CTCSS Lost Interrupt.\n
+    \<5> VoX Found Interrupt.\n
+    \<4> VoX Lost Interrupt.\n
+    \<3> Squelch Found Interrupt.\n
+    \<2> Squelch Lost Interrupt.\n
+    \<1> FSK Rx Sync Interrupt.\n */
+    BK4819_REG_02 = 0x02U,
+    BK4819_REG_06 = 0x06U,
+    /*!
+     * When \<13>=0 for CTC1 \<12:0>=CTC1 frequencycontrolword
+     *   = freq(Hz)*20.64888 for XTAL 13M/26M or
+     *   = freq(Hz)*20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M
+     *   When<13>=1 for CTC2(Tail 55Hz Rx detection)
+     *   \<12:0>=CTC2(should below 100Hz)frequencycontrolword
+     *   = 25391/freq(Hz) for XTAL 13M/26M or
+     *   = 25000/freq(Hz) for XTAL 12.8M/19.2M/25.6M/38.4M
+     *   When \<13>=2 for CDCSS 134.4Hz
+     *   \<12:0>=CDCSS baud rate frequency(134.4Hz) controlword
+     *   = freq(Hz)*20.64888 for XTAL 13M/26M or
+     *   =freq(Hz)*20.97152 for XTAL 12.8M/19.2M/25.6M/38.4M */
+    BK4819_REG_07 = 0x07U,
+    /*!
+    \<15>=1 for CDCSS high 12bit\n
+    \<15>=0 for CDCSS low 12bit\n
+    \<11:0>=CDCSShigh/low 12bit code\n */
+    BK4819_REG_08 = 0x08U,
+    /*!
+    DTMF/SelCall Symbol Coefficient for Detection.\n
+    \<15:12> Symbol Number\n
+    \<7:0> Coefficient.\n */
+    BK4819_REG_09 = 0x09U,
+    /*!
+    \<11:8> DTMF/5Tone Code Received.\n
+    \<7> FSK Rx SyncNegativehas been Found.\n
+    \<6> FSK Rx SyncPositivehas been Found.\n
+    \<4> FSK Rx CRC Indicator. 1=CRC Pass; 0=CRC Fail.\n */
+    BK4819_REG_0B = 0x0BU,
+    /*!
+    \<15> CDCSS negative code received.\n
+    \<14> CDCSS positive code received.\n
+    \<13:12> CTCSS Phase Shift Received.\n
+        00 = No phase shift.\n
+        01 = CTCSS0 120 °phase shift.\n
+        10 = CTCSS0 180 °phase shift.\n
+        11 = CTCSS0 240 °phase shift.\n
+        \<11>:CTC2(55Hz) received.\n
+    \<11> CTC2(55Hz) received\n
+    \<10> CTC1 received\n
+    \<2> VoXIndicator 0: No 1: Yes\n
+    \<1> Squelch resultoutput. 1=Link; 0=Loss\n
+    \<0> Interrupt Indicator. 1=Interrupt Request; 0=No Request.\n */
+    BK4819_REG_0C = 0x0CU,
+    /*!
+    \<15> Frequency Scan Indicator. 1=Busy; 0=Finished.\n
+    \<10:0> Frequency Scan High 16 bits\n */
+    BK4819_REG_0D = 0x0DU,
+    /*!
+    \<15:0> Frequency Scan Low 16 bits.\n
+    \= REG_0D\<10:0>\<\<16 + REG_0E\<15:0>, unit is 10Hz\n */
+    BK4819_REG_0E = 0x0EU,
+    /*!
+    \<15:0> 0x0038 Rx AGC Gain Table[0]. (Index Max->Min is 3,2,1,0,-1)\n
+    \<9:8>=LNA Gain Short 11=0dB; 10=-11dB; 01=-16dB; 00=-19dB.\n
+    \<7:5>=LNA Gain 111=0dB; 110=-2dB; 101=-4dB; 100=-6dB; 011=-9dB; 010=-14dB; 001=-19dB; 000=-24dB.\n
+    \<4:3>=MIXER Gain 11=0dB; 10=-3dB; 01=-6dB; 00=-8dB.\n
+    \<2:0>=PGA Gain 111=0dB; 110=-3dB; 101=-6dB; 100=-9dB; 011=-15dB; 010=-21dB; 001=-27dB; 000=-33dB. */
+    BK4819_REG_10 = 0x10U,
+    /*!
+    \<15:0> Rx AGC Gain Table[1]. (Index Max->Min is 3,2,1,0,-1)\n
+    \<9:8>=LNA Gain Short 11=0dB; 10=-11dB; 01=-16dB; 00=-19dB.\n
+    \<7:5>=LNA Gain 111=0dB; 110=-2dB; 101=-4dB; 100=-6dB; 011=-9dB; 010=-14dB; 001=-19dB; 000=-24dB.\n
+    \<4:3>=MIXER Gain 11=0dB; 10=-3dB; 01=-6dB; 00=-8dB.\n
+    \<2:0>=PGA Gain 111=0dB; 110=-3dB; 101=-6dB; 100=-9dB; 011=-15dB; 010=-21dB; 001=-27dB; 000=-33dB. */
+    BK4819_REG_11 = 0x11U,
+    /*!
+    \<15:0> Rx AGC Gain Table[2]. (Index Max->Min is 3,2,1,0,-1)\n
+    \<9:8>=LNA Gain Short 11=0dB; 10=-11dB; 01=-16dB; 00=-19dB.\n
+    \<7:5>=LNA Gain 111=0dB; 110=-2dB; 101=-4dB; 100=-6dB; 011=-9dB; 010=-14dB; 001=-19dB; 000=-24dB.\n
+    \<4:3>=MIXER Gain 11=0dB; 10=-3dB; 01=-6dB; 00=-8dB.\n
+    \<2:0>=PGA Gain 111=0dB; 110=-3dB; 101=-6dB; 100=-9dB; 011=-15dB; 010=-21dB; 001=-27dB; 000=-33dB. */
+    BK4819_REG_12 = 0x12U,
+    /*!
+    \<15:0> Rx AGC Gain Table[3]. (Index Max->Min is 3,2,1,0,-1)\n
+    \<9:8>=LNA Gain Short 11=0dB; 10=-11dB; 01=-16dB; 00=-19dB.\n
+    \<7:5>=LNA Gain 111=0dB; 110=-2dB; 101=-4dB; 100=-6dB; 011=-9dB; 010=-14dB; 001=-19dB; 000=-24dB.\n
+    \<4:3>=MIXER Gain 11=0dB; 10=-3dB; 01=-6dB; 00=-8dB.\n
+    \<2:0>=PGA Gain 111=0dB; 110=-3dB; 101=-6dB; 100=-9dB; 011=-15dB; 010=-21dB; 001=-27dB; 000=-33dB. */
+    BK4819_REG_13 = 0x13U,
+    /*!
+    \<15:0> Rx AGC Gain Table[4]. (Index Max->Min is 3,2,1,0,-1)\n
+    \<9:8>=LNA Gain Short 11=0dB; 10=-11dB; 01=-16dB; 00=-19dB.\n
+    \<7:5>=LNA Gain 111=0dB; 110=-2dB; 101=-4dB; 100=-6dB; 011=-9dB; 010=-14dB; 001=-19dB; 000=-24dB.\n
+    \<4:3>=MIXER Gain 11=0dB; 10=-3dB; 01=-6dB; 00=-8dB.\n
+    \<2:0>=PGA Gain 111=0dB; 110=-3dB; 101=-6dB; 100=-9dB; 011=-15dB; 010=-21dB; 001=-27dB; 000=-33dB. */
+    BK4819_REG_14 = 0x14U,
+    /*!
+    \<15> Automatic MIC PGA Gain Controller (MIC AGC) Disable. 1=Disable; 0=Enable.*/
+    BK4819_REG_19 = 0x19U,
+    /*!
+    \<15:12> Crystal vReg Bit.\n
+    \<11:8> Crystal iBit.*/
+    BK4819_REG_1A = 0x1AU,
+    /*!
+    \<3:0> PLL CP bit*/
+    BK4819_REG_1F = 0x1FU,
+    BK4819_REG_20 = 0x20U,
+    BK4819_REG_21 = 0x21U,
+    /*!
+    \<5> DTMF/SelCall Enable. 1=Enable; 0=Disable.\n
+    \<4> DTMF or SelCall Detection Mode. 1=for DTMF; 0=for SelCall.\n
+    \<3:0> Max Symbol Number for SelCall Detection.*/
+    BK4819_REG_24 = 0x24U,
+    /*!
+    \<15:14> Expander (AF Rx) Ratio. 00=Disable; 01=1:2; 10=1:3; 11=1:4\n
+    \<13:7> Expander (AF Rx) 0 dB point(dB)\n
+    \<6:0> Expander (AF Rx) noise point(dB)*/
+    BK4819_REG_28 = 0x28U,
+    /*!
+    \<15:14> Compress (AF Tx) Ratio. 00=Disable; 01=1.333:1; 10=2:1; 11=4:1\n
+    \<13:7> Compress (AF Tx) 0 dB point(dB)\n
+    \<6:0> Compress (AF Tx) noise point(dB)*/
+    BK4819_REG_29 = 0x29U,
+    /*!
+    \<10> Disable AFRxHPF300filter. 0=Enable; 1=Disable\n
+    \<9> Disable AF RxLPF3K filter. 0=Enable; 1=Disable\n
+    \<8> Disable AF Rx de-emphasisfilter. 0=Enable; 1=Disable\n
+    \<2> Disable AFTxHPF300filter. 0=Enable; 1=Disable\n
+    \<1> Disable AFTxLPF1filter. 0=Enable; 1=Disable\n
+    \<0> Disable AFTxpre-emphasisfilter. 0=Enable; 1=Disable
+     */
+    BK4819_REG_2B = 0x2BU,
+    /*!
+    \<9:8> CTCSS/CDCSS Tx Gain2 Tuning (after Gain1). 00=12dB; 01=6dB; 10=0dB; 11=-6dB*/
+    BK4819_REG_2E = 0x2EU,
+    /*!
+    \<15> VCO Calibration Enable. 1=Enable, 0=Disable\n
+    \<13:10> Rx Link Enable (include LNA/MIXER/PGA/ADC). 1111=Enable, 0000=Disable\n
+    \<9> AF DAC Enable. 1=Enable, 0=Disable.\n
+    \<8> DISC Mode Disable. 1=Disable, 0=Enable.\n
+    \<7:4> PLL/VCO Enable. 1111=Enable, 0000=Disable\n
+    \<3> PA Gain Enable. 1=Enable, 0=Disable\n
+    \<2> MIC ADC Enable. 1=Enable, 0=Disable\n
+    \<1> Tx DSP Enable. 1=Enable, 0=Disable\n
+    \<0> Rx DSP Enable. 1=Enable, 0=Disable.*/
+    BK4819_REG_30 = 0x30U,
+    /*!
+    \<3> Enable Compander Function. 1=Enable, 0=Disable\n
+    \<2> Enable VOX detection. 1=Enable, 0=Disable\n
+    \<1> Enable Scramble Function. 1=Enable, 0=Disable*/
+    BK4819_REG_31 = 0x31U,
+    /*!
+    \<15:14> FrequencyScan Time. 00=0.2 Sec; 01=0.4 Sec; 10=0.8 Sec; 11=1.6 Sec\n
+    \<0> FrequencyScanEnable. 1=Enable; 0=Disable. */
+    BK4819_REG_32 = 0x32U,
+    /*!
+    \<15:8> GPIOs Output Disable. 1=Output Disable; 0=Output Enable\n
+    \<7:0> GPIOs Output Value. 1= High when Output Enable; 0=Low when Output Enable */
+    BK4819_REG_33 = 0x33U,
+    /*!
+    \<15:12> GPIO4 Output Type Selection\n
+    \<11:8> GPIO5 Output Type Selection\n
+    \<3:0> GPIO6 Output Type Selection\n
+        0=High/Low\n
+        1=Interrupt\n
+        2=Squelch\n
+        3=VoX\n
+        4=CTCSS/CDCSS Compared Result\n
+        5=CTCSS Compared Result\n
+        6=CDCSS Compared Result\n
+        7=Tail Detected Result\n
+        8=DTMF/5Tone Symbol Received Flag\n
+        9=CTCSS/CDCSS Digital Wave\n
+        Others=Reserved\n*/
+    BK4819_REG_34 = 0x34U,
+    /*!
+    \<15:12> GPIO0 Output Type Selection\n
+    \<11:8> GPIO1 Output Type Selection\n
+    \<3:0> GPIO2 Output Type Selection\n
+        0=High/Low\n
+        1=Interrupt\n
+        2=Squelch\n
+        3=VoX\n
+        4=CTCSS/CDCSS Compared Result\n
+        5=CTCSS Compared Result\n
+        6=CDCSS Compared Result\n
+        7=Tail Detected Result\n
+        8=DTMF/5Tone Symbol Received Flag\n
+        9=CTCSS/CDCSS Digital Wave\n
+        Others=Reserved\n*/
+    BK4819_REG_35 = 0x35U,
+    /*!
+    \<15:8> PA Biasoutput 0~3.2V 0x00=0V…0xFF=3.2V\n
+    \<7> 1=Enable PACTLoutput; 0=Disable(Output 0 V)\n
+    \<5:3> PA Gain1 Tuning. 111(max)->000(min)\n
+    \<2:0> PA Gain2 Tuning. 111(max)->000(min)*/
+    BK4819_REG_36 = 0x36U,
+    /*!
+    \<14:12> DSP Voltage Setting.\n
+    \<11> ANA LDO Selection. 1=2.7v, 0=2.4v\n
+    \<10> VCO LDO Selection. 1=2.7v, 0=2.4v\n
+    \<9> RF LDO Selection. 1=2.7v, 0=2.4v\n
+    \<8> PLL LDO Selection. 1=2.7v, 0=2.4v\n
+    \<7> ANA LDO Bypass. 1=Bypass, 0=Enable.\n
+    \<6> VCO LDO Bypass. 1=Bypass, 0=Enable.\n
+    \<5> RF LDO Bypass. 1=Bypass, 0=Enable.\n
+    \<4> PLL LDO Bypass. 1=Bypass, 0=Enable.\n
+    \<3> Reserved.\n
+    \<2> DSP Enable. 1=Enable, 0=Disable.\n
+    \<1> XTAL Enable. 1=Enable, 0=Disable.\n
+    \<0> Band-Gap Enable. 1=Enable, 0=Disable.*/
+    BK4819_REG_37 = 0x37U,
+    /*!
+    \<15:0> Frequency(Hz)= (freq_hi16\<\<16 + freq_lo16)*10*/
+    BK4819_REG_38 = 0x38U,
+    BK4819_REG_39 = 0x39U,
+    BK4819_REG_3A = 0x3AU,
+    /*!
+    \<15:0> Crystal Frequency Low-16bits. LSB->5Hz*/
+    BK4819_REG_3B = 0x3BU,
+    /*!
+    \<15:8> Crystal Frequency High-8bits.\n
+    \<7:6> Crystal Frequency Mode Selection. 00~=13MHz; 01~=19.2MHz; 10~=26MHz; 11~=38.4MHz*/
+    BK4819_REG_3C = 0x3CU,
+    /*!
+    \<15:0> IF Selection.\n
+    0=Zero IF;\n
+    0x2aab~=8.46kHz IF;\n
+    0x4924~=7.25kHz IF;\n
+    0x6800~=6.35kHz IF;\n
+    0x871c~=5.64kHz IF;\n
+    0xa666~=5.08kHz IF;\n
+    0xc5d1~=4.62kHz IF;\n
+    0xe555~=4.23kHz IF;\n
+    if REG_43<5>=1, IF *=2;*/
+    BK4819_REG_3D = 0x3DU,
+    /*!
+    \<15:0> Band Selection Threshold. ~=VCO Max Frequency(Hz)/96/640*/
+    BK4819_REG_3E = 0x3EU,
+    /*!
+    \<15> FSK Tx Finished Interrupt Enable. 1=Enable; 0=Disable.\n
+    \<14> FSK FIFO Almost Empty Interrupt Enable. 1=Enable; 0=Disable.\n
+    \<13> FSK Rx Finished Interrupt Enable. 1=Enable; 0=Disable.\n
+    \<12> FSK FIFO Almost FullInterrupt Enable. 1=Enable; 0=Disable.\n
+    \<11> DTMF/5TONE Found Interrupt Enable. 1=Enable; 0=Disable.\n
+    \<10> CTCSS/CDCSSTail Found InterruptEnable. 1=Enable; 0=Disable.\n
+    \<9> CDCSS Found InterruptEnable. 1=Enable; 0=Disable.\n
+    \<8> CDCSS Lost InterruptEnable. 1=Enable; 0=Disable.\n
+    \<7> CTCSS Found InterruptEnable. 1=Enable; 0=Disable.\n
+    \<6> CTCSS Lost InterruptEnable. 1=Enable; 0=Disable.\n
+    \<5> VoX Found InterruptEnable. 1=Enable; 0=Disable.\n
+    \<4> VoX Lost InterruptEnable. 1=Enable; 0=Disable.\n
+    \<3> Squelch Found InterruptEnable. 1=Enable; 0=Disable.\n
+    \<2> Squelch Lost InterruptEnable. 1=Enable; 0=Disable.\n
+    \<1> FSK Rx Sync Interrupt Enable. 1=Enable; 0=Disable.*/
+    BK4819_REG_3F = 0x3FU,
+    /*!
+    \<12> Enable RF TxDeviation. 1=Enable; 0=Disable\n
+    \<11:0> RF Tx Deviation Tuning (Apply for both in-band signal and sub-audio signal). 0=min; 0xFFF=max*/
+    BK4819_REG_40 = 0x40U,
+    /*!
+    \<14:12> RF filter bandwidth (Apass=0.1dB)\n
+    000 = 1.7 kHz; 001 = 2 kHz; 010 = 2.5 kHz; 011 = 3 kHz; 100 = 3.75 kHz; 101 = 4 kHz; 110 = 4.25 kHz; 111 = 4.5 kHz; if REG_43<5>=1, RF filter bandwidth *=2;\n
+    \<11:9> RF filter bandwidth when signal is weak (Apass=0.1dB)
+    000 = 1.7 kHz; 001 = 2 kHz; 010 = 2.5 kHz; 011 = 3 kHz; 100 = 3.75 kHz; 101 = 4 kHz; 110 = 4.25 kHz; 111 = 4.5 kHz; if REG_43<5>=1, RF filter bandwidth *=2;\n
+    \<8:6> AFTxLPF2 filter Band Width (Apass=1dB) Selection.
+    100 = 4.5 kHz; 101 = 4.25 kHz; 110 =4kHz; 111 = 3.75 kHz; 000 = 3 kHz (for 25k Channel Space); 001 = 2.5 kHz (for 12.5k Channel Space); 010 = 2.75 kHz; 011 =3.5 kHz;\n
+    \<5:4> BW Mode Selection.\n
+    00=12.5k; 01=6.25k; 10=25k/20k\n
+    \<2> Gain after FM Demodulation.\n
+    1=6dB; 0=0 dB. */
+    BK4819_REG_43 = 0x43U,
+    /*!
+    \<15:0> 300Hz AF Response coefficient for Tx. */
+    BK4819_REG_44 = 0x44U,
+    /*!
+    \<15:0> 300Hz AF Response coefficient for Tx. */
+    BK4819_REG_45 = 0x45U,
+    /*!
+    \<10:0> Voice AmplitudeThreshold for VOX=1 detect. */
+    BK4819_REG_46 = 0x46U,
+    /*!
+    \<13> AF Output Inverse Mode. 1=Inverse.\n
+    \<11:8> AFOutputSelection.\n
+    0x0=Mute;\n
+    0x1=Normal AF Out;\n
+    0x2=Tone Out for Rx (Should enable Tone1 first);\n
+    0x3=Beep Out for Tx (Should enable Tone1 first and set REG_03[9]=1 to enable AF;\n
+    0x6=CTCSS/CDCSS Out for Rx Test;\n
+    0x8=FSK Out for Rx Test;\n
+    Others=Reserved;\n
+    \<0> AF Tx Filter Bypass All. 1=Bypass All AF Tx filter; 0=Normal.*/
+    BK4819_REG_47 = 0x47U,
+    /*!
+    \<11:10> AF Rx Gain1.\n
+    00=0dB;01=-6dB;10=-12dB;11=-18dB\n
+    \<9:4> AF Rx Gain2.\n
+    -26dB~5.5dB, 0.5dB/step. 0x00=mute\n
+    \<3:0> AF DAC Gain (after Gain1 and Gain2).\n
+    1111=max; 0000=min; about 2dB/step*/
+    BK4819_REG_48 = 0x48U,
+    BK4819_REG_49 = 0x49U,
+    /*!
+    \<5> AF Level Controller(ALC) Disable. 1=Disable; 0=Enable.*/
+    BK4819_REG_4B = 0x4BU,
+    /*!
+    \<7:0> Glitch threshold for Squelch =0*/
+    BK4819_REG_4D = 0x4DU,
+    /*!
+    \<13:11> Squelch=1 Delay Setting.\n
+    \<10:9> Squelch=0 Delay Setting.\n
+    \<7:0> Glitch threshold for Squelch =1*/
+    BK4819_REG_4E = 0x4EU,
+    /*!
+    \<14:8> Ex-noise threshold for Squelch =0\n
+    \<6:0> Ex-noise threshold for Squelch =1*/
+    BK4819_REG_4F = 0x4FU,
+    /*!
+    \<15> Enable AF Tx Mute (for DTMF Tx or other applications). 1=Mute; 0=Normal*/
+    BK4819_REG_50 = 0x50U,
+    /*!
+    \<15> 1=Enable TxCTCSS/CDCSS; 0=Disable\n
+    \<14> 1= GPIO0Input for CDCSS; 0=Normal Mode.(for BK4819v3)\n
+    \<13> 1=Transmit negative CDCSS code. 0=Transmit positive CDCSScode\n
+    \<12> CTCSS/CDCSS mode selection. 1=CTCSS, 0=CDCSS\n
+    \<11> CDCSS 24/23bit selection. 1=24bit, 0=23bit\n
+    \<10> 1050HzDetectionMode. 1=1050/4 Detect Enable, CTC1 should be set to 1050/4 Hz\n
+    \<9> Auto CDCSS Bw Mode. 1=Disable; 0=Enable.\n
+    \<8> Auto CTCSS Bw Mode. 0=Enable; 1=Disable\n
+    \<6:0> CTCSS/CDCSS Tx Gain1 Tuning. 0=min; 0x7F=max*/
+    BK4819_REG_51 = 0x51U,
+    /*!
+    \<15> Enable 120/180/240 degree shift CTCSS or 134.4Hz Tail when CDCSS mode. 0=Normal, 1=Enable\n
+    \<14:13> CTCSS tail modeselection (only valid when REG_52<15>=1).\n
+    00= for 134.4Hz CTCSS Tail when CDCSS mode.\n
+    01=CTCSS0 120° phase shift,\n
+    10= CTCSS0 180° phase shift\n
+    11= CTCSS0 240° phase shift\n
+    \<12> CTCSSDetectionThreshold Mode, 1=~0.1%; 0=0.1 Hz\n
+    \<11:6> CTCSS found detect threshold.\n
+    \<5:0> CTCSS lost detect threshold.*/
+    BK4819_REG_52 = 0x52U,
+    /*!
+    \<15:0> 300Hz AF Response coefficient for Rx.*/
+    BK4819_REG_54 = 0x54U,
+    /*!
+    \<15:0> 300Hz AF Response coefficient for Rx.*/
+    BK4819_REG_55 = 0x55U,
+    /*!
+    \<15:13> FSK Tx Mode Selection.\n
+    000 for FSK1.2K and FSK2.4K Tx;\n
+    001 for FFSK1200/1800 Tx;\n
+    011 for FFSK1200/2400 Tx;\n
+    101 for NOAA SAME Tx;\n
+    \<12:10> FSK Rx Mode Selection.\n
+    000 for FSK1.2K, FSK2.4K Rx and NOAA SAME Rx;\n
+    111 for FFSK1200/1800 Rx;\n
+    100 for FFSK1200/2400 Rx;\n
+    \<9:8> FSK Rx Gain.\n
+    \<5:4> FSK Preamble Type Selection.\n
+    11=0xAA; \n
+    10=0x55; \n
+    00=0xAA or 0x55 due to the MSB of FSK Sync Byte 0.\n
+    \<3:1>FSK Rx BandWidth Setting.\n
+    100 for FSK 2.4K and FFSK1200/2400;\n
+    000 for FSK 1.2K;\n
+    001 for FFSK1200/1800;\n
+    010 for NOAA SAME Rx\n
+    \<0>FSK Enable. 1=Enable; 0=Disable.\n
+    */
+    BK4819_REG_58 = 0x58U,
+    /*!
+    \<15> Clear TX FIFO, 1=clear\n
+    \<14> Clear RX FIFO, 1=clear\n
+    \<13> 1=Enable FSK Scramble\n
+    \<12> 1=Enable FSK RX\n
+    \<11> 1=Enable FSK TX\n
+    \<10> 1=Invert FSK data when RX\n
+    \<9> 1=Invert FSK data when TX\n
+    \<7:4> FSK Preamble Length Selection\n
+    0=1 byte; 1=2 bytes; 2=3 bytes; …; 15=16 bytes\n
+    \<3> FSK SyncLength Selection.\n
+    1=4 bytes (FSK Sync Byte 0,1,2,3); 0=2 bytes (FSK Sync Byte 0,1)*/
+    BK4819_REG_59 = 0x59U,
+    /*!
+    \<15:8> FSK Sync Byte 0 (Sync Byte 0 first, then 1,2,3)\n
+    \<7:0> FSK Sync Byte 1*/
+    BK4819_REG_5A = 0x5AU,
+    /*!
+    \<15:8> FSK Sync Byte 2\n
+    \<7:0> FSK Sync Byte 3*/
+    BK4819_REG_5B = 0x5BU,
+    /*!
+    \<6> CRC Option Enable. 1=Enable; 0=Disable.*/
+    BK4819_REG_5C = 0x5CU,
+    /*!
+    \<15:8> FSK Data Length(Byte)Low 8bits(Total 11 bits for BK4819v3). For example, 0xF means 16 bytes length\n
+    \<7:0> FSK Data Length(Byte)High 3bits(Total 11 bits for BK4819v3).*/
+    BK4819_REG_5D = 0x5DU,
+    /*!
+    \<9:3> FSK Tx FIFO (Total 128 Words) Almost Empty Threshold.\n
+    \<2:0> FSK Rx FIFO (Total 8 Words) Almost Full Threshold.*/
+    BK4819_REG_5E = 0x5EU,
+    /*!
+    \<15:0> FSK Word Input/Output. */
+    BK4819_REG_5F = 0x5FU,
+    /*!
+    \<7:0> Glitch indicator. */
+    BK4819_REG_63 = 0x63U,
+    /*!
+    \<15:0> Voice AmplitudeOut. */
+    BK4819_REG_64 = 0x64U,
+    /*!
+    \<6:0> Ex-noiseindicator, dB/step. */
+    BK4819_REG_65 = 0x65U,
+    /*!
+    \<8:0> 0.5dB/step, RSSI (dBm) ~= REG_67<8:0>/2 – 160. */
+    BK4819_REG_67 = 0x67U,
+    /*!
+    \<15> CTCSS Scan Indicator. 1=Busy; 0=Found.\n
+    \<12:0> CTCSS Frequency.\n
+    Frequency(Hz)\n
+    = REG_68<12:0>/20.64888 for 13M/26M XTAL and\n
+    = REG_68<12:0>/20.97152 for 12.8M/19.2M/25.6M/38.4M XTAL*/
+    BK4819_REG_68 = 0x68U,
+    /*!
+    \<15> CTCSS Scan Indicator. 1=Busy; 0=Found.\n
+    \<14> 23 or 24 bit CDCSS Indicator.(for BK4819v3) 1=24 bit; 0=23 bit.\n
+    \<11:0> CDCSS High 12 bits.*/
+    BK4819_REG_69 = 0x69U,
+    /*!
+    \<11:0> CDCSS Low 12 bits.*/
+    BK4819_REG_6A = 0x6AU,
+    /*!
+    \<6:0> AF Tx/Rx Input Amplitude(dB)*/
+    BK4819_REG_6F = 0x6FU,
+    /*!
+    \<15> Enable TONE1 1=Enable; 0=Disable.\n
+    \<14:8> TONE1tuninggain \n
+    \<7> Enable TONE2. 1=Enable; 0=Disable.\n
+    \<6:0> TONE2/FSK tuninggain*/
+    BK4819_REG_70 = 0x70U,
+    /*!
+    \<15:0> TONE1/Scramblefrequencycontrolword. =freq(Hz)*10.32444 for XTAL 13M/26M or\n
+     =freq(Hz)* 10.48576 for XTAL 12.8M/19.2M/25.6M*/
+    BK4819_REG_71 = 0x71U,
+    /*!
+    \<15:0> TONE2/FSK frequencycontrolword =freq(Hz)*10.32444 for XTAL 13M/26M or\n
+    =freq(Hz)* 10.48576 for XTAL 12.8M/19.2M/25.6M/38.4M.*/
+    BK4819_REG_72 = 0x72U,
+    /*!
+    \<13:11> Automatic Frequency Correction(AFC) Range Selection. 000=max; 111=min\n
+    \<4> Automatic Frequency Correction(AFC) Disable. 1=Disable; 0=Enable.*/
+    BK4819_REG_73 = 0x73U,
+    /*!
+    \<15:0> 3000Hz AF Response coefficient for Tx.*/
+    BK4819_REG_74 = 0x74U,
+    /*!
+    \<15:0> 3000Hz AF Response coefficient for Rx.*/
+    BK4819_REG_75 = 0x75U,
+    /*!
+    \<15:8> RSSI threshold for Squelch=1, 0.5dB/step\n
+    \<7:0> RSSI threshold for Squelch =0, 0.5dB/step*/
+    BK4819_REG_78 = 0x78U,
+    /*!
+    \<15:11> VoX Detection Interval Time.\n
+    \<7:0> Voice Amplitude Threshold for VOX=0 detect*/
+    BK4819_REG_79 = 0x79U,
+    /*!
+    \<4:0> VoX=0 Detection delay, *128ms*/
+    BK4819_REG_7A = 0x7AU,
+    BK4819_REG_7B = 0x7BU,
+    BK4819_REG_7C = 0x7CU,
+    /*!
+    \<4:0> MIC Sensitivity Tuning. 0x00=min; 0x1F=max; 0.5dB/step*/
+    BK4819_REG_7D = 0x7DU,
+    /*!
+    \<15> AGC Fix Mode. 1=Fix; 0=Auto.\n
+    \<14:12> AGC Fix Index. 011=Max, then 010,001,000,111,110,101,100(min).\n
+    \<5:3> DC Filter Band Width for Tx (MIC In). 000=Bypass DC filter;\n
+    \<2:0> DC Filter Band Width for Rx (IF In). 000=Bypass DC filter;*/
+    BK4819_REG_7E = 0x7EU,
 };
 
 typedef enum BK4819_REGISTER_t BK4819_REGISTER_t;