mckero/uv-k1-k5v3-firmware-custom
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Align BK4829 AGC runtime with stock firmware

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Armel FAUVEAU committed 2026-03-23 00:31:16 +01:00
1 parent 688b3a5c77
commit 6fdb17d64a
2 files changed
+23 -42
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App/driver/bk4829.c
+16 -38
View File
@@ -334,45 +334,9 @@ void BK4819_SetAGC(bool enable)
void BK4819_InitAGC(bool amModulation)
{
// REG_10, REG_11, REG_12 REG_13, REG_14
//
// Rx AGC Gain Table[]. (Index Max->Min is 3,2,1,0,-1)
//
// <15:10> ???
//
// <9:8> LNA Gain Short
// 3 = 0dB <<< 1o11 read from spectrum reference manual
// 2 = -24dB -19 -11
// 1 = -30dB -24 -16
// 0 = -33dB -28 -19
//
// <7:5> LNA Gain
// 7 = 0dB
// 6 = -2dB
// 5 = -4dB
// 4 = -6dB
// 3 = -9dB
// 2 = -14dB <<<
// 1 = -19dB
// 0 = -24dB
//
// <4:3> MIXER Gain
// 3 = 0dB <<<
// 2 = -3dB
// 1 = -6dB
// 0 = -8dB
//
// <2:0> PGA Gain
// 7 = 0dB
// 6 = -3dB <<<
// 5 = -6dB
// 4 = -9dB
// 3 = -15dB
// 2 = -21dB
// 1 = -27dB
// 0 = -33dB
//
/*
// Old strategy
BK4819_WriteRegister(BK4819_REG_13, 0x03BE); // 0x03BE / 000000 11 101 11 110 / -7dB
BK4819_WriteRegister(BK4819_REG_12, 0x037B); // 0x037B / 000000 11 011 11 011 / -24dB
BK4819_WriteRegister(BK4819_REG_11, 0x027B); // 0x027B / 000000 10 011 11 011 / -43dB
@@ -387,7 +351,21 @@ void BK4819_InitAGC(bool amModulation)
}
BK4819_WriteRegister(BK4819_REG_7B, 0x8420);
*/
// New strategy
// Keep the runtime AGC profile aligned with the stock BK4829 firmware
// until modulation-specific AGC changes are proven on hardware.
(void)amModulation;
BK4819_WriteRegister(BK4819_REG_10, 0x0318);
BK4819_WriteRegister(BK4819_REG_11, 0x033A);
BK4819_WriteRegister(BK4819_REG_12, 0x03DB);
BK4819_WriteRegister(BK4819_REG_13, 0x03DF);
BK4819_WriteRegister(BK4819_REG_14, 0x0210);
BK4819_WriteRegister(BK4819_REG_49, 0x2AB2);
BK4819_WriteRegister(BK4819_REG_7B, 0x73DC);
}
int8_t BK4819_GetRxGain_dB(void)
App/radio.c
+7 -4
View File
@@ -1128,13 +1128,16 @@ void RADIO_SetModulation(ModulationMode_t modulation)
BK4819_WriteRegister(0x31,uVar1 | 1);
BK4819_WriteRegister(0x42,0x6f5c);
BK4819_WriteRegister(0x2a,0x7434);
BK4819_WriteRegister(0x2b,0x300);
BK4819_WriteRegister(0x2b,0x400);
BK4819_WriteRegister(0x2f,0x9990);
//BK4819_WriteRegister(0x54, 0x9775);
//BK4819_WriteRegister(0x55, 0x32c6);
BK4819_WriteRegister(0x54, 0x8846);
BK4819_WriteRegister(0x55, 0x38C0);
//BK4819_WriteRegister(0x54, 0x8846);
//BK4819_WriteRegister(0x55, 0x38C0);
BK4819_WriteRegister(0x54, 0x9009);
BK4819_WriteRegister(0x55, 0x31a9);
BK4819_SetFilterBandwidth(BK4819_FILTER_BW_AM, true);
}
@@ -1149,7 +1152,7 @@ void RADIO_SetModulation(ModulationMode_t modulation)
void RADIO_SetupAGC(bool listeningAM, bool disable)
{
static uint8_t lastSettings;
static uint8_t lastSettings = 0xFF;
uint8_t newSettings = (listeningAM << 1) | disable;
if (lastSettings == newSettings)
return;