feat: 32kHz to track satellite doppler, set BK bandwidth by api

libs/k5_uv_system/api.s

@@ -43,6 +43,9 @@ BK4819Reset = 0xa7cc + 1;
 .globl IntDivide
 IntDivide = 0x128 + 1;
 
+.globl BK4819SetChannelBandwidth
+BK4819SetChannelBandwidth = 0xaa48 + 1;
+
 .globl BK4819WriteFrequency
 BK4819WriteFrequency = 0xaabc + 1;
 

libs/k5_uv_system/system.hpp

@@ -23,6 +23,7 @@ extern "C" {
       void AirCopyFskSetup();
       void BK4819Reset();
       int IntDivide(int s32Divident, int s32Divisor);
+      void BK4819SetChannelBandwidth(bool narrow);
       void BK4819WriteFrequency(unsigned int u32Frequency);
       void BK4819SetPaGain(unsigned short u16PaBias, unsigned int u32Frequency);
       void BK4819ConfigureAndStartTxFsk();

src/spectrum_fagci/spectrum.hpp

@@ -10,11 +10,11 @@ public:
   static constexpr auto DrawingEndY = 42;
   static constexpr auto BarPos = 5 * 128;
 
-  static constexpr u32 modeHalfSpectrumBW[6] = {50_KHz,  100_KHz, 200_KHz,
+  static constexpr u32 modeHalfSpectrumBW[6] = {16_KHz,  100_KHz, 200_KHz,
                                                 400_KHz, 800_KHz, 1600_KHz};
-  static constexpr u16 modeScanStep[6] = {1562_Hz, 6250_Hz, 12500_Hz,
-                                          25_KHz,  25_KHz,  25_KHz};
-  static constexpr u8 modeXdiv[6] = {1, 2, 2, 2, 1, 0};
+  static constexpr u16 modeScanStep[6] = {1_KHz,  6250_Hz, 12500_Hz,
+                                          25_KHz, 25_KHz,  25_KHz};
+  static constexpr u8 modeXdiv[6] = {2, 2, 2, 2, 1, 0};
 
   u8 rssiHistory[128] = {};
   u32 fMeasure;
@@ -289,11 +289,12 @@ private:
   void ResetPeak() { peakRssi = 0; }
 
   void SetBW() {
-    auto Reg = BK4819Read(0x43);
+    /* auto Reg = BK4819Read(0x43);
     Reg &= ~(0b11 << 4);
     if (mode >= 3)
-      Reg |= 0b11 << 4;
-    BK4819Write(0x43, Reg);
+      Reg |= 0b10 << 4;
+    BK4819Write(0x43, Reg); */
+    BK4819SetChannelBandwidth(mode < 3);
   }
   void MuteAF() { BK4819Write(0x47, 0); }
   void RestoreOldAFSettings() { BK4819Write(0x47, oldAFSettings); }