mckero/uv-k1-k5v3-firmware-custom
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Add BK4829-specific AM configuration

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Andrej committed 2025-12-05 00:07:04 -05:00
1 parent f3e1a37701
commit e534610d86
1 file changed
+30 -1
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App/radio.c
+30 -1
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@@ -999,7 +999,7 @@ void RADIO_SetModulation(ModulationMode_t modulation)
mod = BK4819_AF_FM;
break;
case MODULATION_AM:
mod = BK4819_AF_AM;
mod = BK4819_AF_FM; // AM no longer needs special AF setting
break;
case MODULATION_USB:
mod = BK4819_AF_BASEBAND2;
@@ -1017,6 +1017,35 @@ void RADIO_SetModulation(ModulationMode_t modulation)
BK4819_SetAF(mod);
// HACK, FIXME:
// What follows is a direct copy of the AM enable/disable code from
// the original UV-K1 firmware. It is not clear why these specific register
// values are used for AM all of a sudden instead of the AF setting like on
// the BK4819, nor what exactly they do.
// So for now we just keep it as is to maintain compatibility.
//
if (modulation != MODULATION_AM)
{
uint16_t uVar1 = BK4819_ReadRegister(0x31);
BK4819_WriteRegister(0x31,uVar1 & 0xfffffffe);
BK4819_WriteRegister(0x42,0x6b5a);
BK4819_WriteRegister(0x43, 0x3028);
BK4819_WriteRegister(0x2a,0x7400);
BK4819_WriteRegister(0x2b,0);
BK4819_WriteRegister(0x2f,0x9890);
//BK4819_WriteRegister(0x48, 0xb3a8); // set AF RX gain and DAC settings
}
else
{
uint16_t uVar1 = BK4819_ReadRegister(0x31);
BK4819_WriteRegister(0x31,uVar1 | 1);
BK4819_WriteRegister(0x42,0x6f5c);
BK4819_WriteRegister(0x43, 0x347c);
BK4819_WriteRegister(0x2a,0x7434);
BK4819_WriteRegister(0x2b,0x600);
BK4819_WriteRegister(0x2f,0x9990);
}
BK4819_SetRegValue(afDacGainRegSpec, 0xF);
BK4819_WriteRegister(BK4819_REG_3D, modulation == MODULATION_USB ? 0 : 0x2AAB);
BK4819_SetRegValue(afcDisableRegSpec, modulation != MODULATION_FM);