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Activating TX Low Pass Filter in Second IF IC (#1470)

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* Activating TX Low Pass Filter in Second IF IC
* solving PR conversation revisions
* Final TX LPF decision for ADSB_TX
* Small comments correction.
* Added set TX LPF also  in APRS, BurgerPgr,Jammer
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Brumi-2021 2023-10-08 17:50:31 +02:00 • committed by GitHub
parent 5a850984b9
commit defb934c3f
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19 changed files with 81 additions and 18 deletions
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28
firmware/application/hw/max2839.cpp
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@ -278,10 +278,32 @@ void MAX2839::set_vga_gain(const int_fast8_t db) {
configure_rx_gain();
}
void MAX2839::set_lpf_rf_bandwidth(const uint32_t bandwidth_minimum) {
void MAX2839::set_lpf_rf_bandwidth_rx(const uint32_t bandwidth_minimum) {
_map.r.lpf_vga_1.ModeCtrl = 0b01; /* Address reg 5, D9-D8, Set mode lowpass filter block to Rx LPF . Active when Address 8 D<2> = 1 */
flush_one(Register::LPF_VGA_1);
_map.r.rx_top_1.LPF_MODE_SEL = 1; /* Address 8 reg, D2 bit:LPF mode mux, LPF_MODE_SEL 0 = Normal operation, 1 = Operating mode is programmed Address 5 D<9:8> */
flush_one(Register::RX_TOP_1);
_map.r.lpf.FT = filter::bandwidth_ordinal(bandwidth_minimum);
_dirty[Register::LPF] = 1;
flush();
flush_one(Register::LPF);
_map.r.rx_top_1.LPF_MODE_SEL = 0; /* Address 8 reg, D2 bit:LPF mode mux, LPF_MODE_SEL 0 = Normal operation, 1 = Operating mode is programmed Address 5 D<9:8> */
flush_one(Register::RX_TOP_1); /* Leave LPF_MODE_SEL 0 = Normal operation */
}
void MAX2839::set_lpf_rf_bandwidth_tx(const uint32_t bandwidth_minimum) {
_map.r.lpf_vga_1.ModeCtrl = 0b10; /* Address reg 5, D9-D8, Set mode lowpass filter block to Tx LPF . Active when Address 8 D<2> = 1 */
flush_one(Register::LPF_VGA_1);
_map.r.rx_top_1.LPF_MODE_SEL = 1; /* Address 8 reg, D2 bit:LPF mode mux, LPF_MODE_SEL 0 = Normal operation, 1 = Operating mode is programmed Address 5 D<9:8> */
flush_one(Register::RX_TOP_1);
_map.r.lpf.FT = filter::bandwidth_ordinal(bandwidth_minimum);
flush_one(Register::LPF);
_map.r.rx_top_1.LPF_MODE_SEL = 0; /* Address 8 reg, D2 bit:LPF mode mux, LPF_MODE_SEL 0 = Normal operation, 1 = Operating mode is programmed Address 5 D<9:8> */
flush_one(Register::RX_TOP_1); /* Leave LPF_MODE_SEL 0 = Normal operation */
}
bool MAX2839::set_frequency(const rf::Frequency lo_frequency) {