mirror of
https://github.com/meshcore-dev/MeshCore.git
synced 2026-08-14 07:19:46 +00:00
Adam Gessaman
c58c9b2f31
PA PL1 re-targets the PA's DC-DC supply rail rather than selecting a logic-level gain, and the serial CLI is serviced on every main-loop pass regardless of whether a transmit is in flight. A `set radio.fem.txgain` write could therefore move the rail mid-transmit, while the SX1262 was still driving the PA at full input power. Record the requested level in setPAGainEnable() and drive the pin from setTxModeEnable(), which runs from onBeforeTransmit() ahead of startTransmit(). The level only matters while transmitting, so deferring costs nothing. Document that the pref is saved immediately but applied at the next transmit, so `get radio.fem.txgain` can lead the hardware until then.
80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
#include "LoRaFEMControl.h"
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#include <Arduino.h>
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#include <driver/rtc_io.h>
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void LoRaFEMControl::init() {
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#ifdef P_PA1_EN
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rtc_gpio_hold_dis((gpio_num_t)P_PA1_EN);
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pinMode(P_PA1_EN, OUTPUT);
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applyPAGain();
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#endif
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#ifdef P_PRIMARY_LNA_EN
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rtc_gpio_hold_dis((gpio_num_t)P_PRIMARY_LNA_EN);
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pinMode(P_PRIMARY_LNA_EN, OUTPUT);
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setRxModeEnable();
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#endif
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}
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void LoRaFEMControl::setSleepModeEnable() {
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#ifdef P_PA1_EN
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// PA PL1 low/open selects the lower of the two hardware-jumper-selected levels.
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digitalWrite(P_PA1_EN, !P_PA1_EN_ACTIVE);
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#endif
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#ifdef P_PRIMARY_LNA_EN
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// Preserve the existing Station G3 power-off state.
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digitalWrite(P_PRIMARY_LNA_EN, P_PRIMARY_LNA_EN_ACTIVE);
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#endif
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}
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void LoRaFEMControl::setTxModeEnable() {
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// Latch the requested PA level here, before the SX1262 starts driving the PA. PA PL1
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// retargets the PA's DC-DC rail, so moving it mid-transmit collapses the supply while
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// the PA is still driven at full input power.
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applyPAGain();
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#ifdef P_PRIMARY_LNA_EN
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digitalWrite(P_PRIMARY_LNA_EN, !P_PRIMARY_LNA_EN_ACTIVE);
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#endif
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}
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void LoRaFEMControl::setRxModeEnable() {
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#ifdef P_PRIMARY_LNA_EN
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digitalWrite(P_PRIMARY_LNA_EN, lna_enabled ? P_PRIMARY_LNA_EN_ACTIVE : !P_PRIMARY_LNA_EN_ACTIVE);
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#endif
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}
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void LoRaFEMControl::setLNAEnable(bool enabled) {
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lna_enabled = enabled;
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setRxModeEnable();
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}
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void LoRaFEMControl::setPAGainEnable(bool enabled) {
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// Recorded only -- the pin is driven from setTxModeEnable(). The PA level only matters
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// while transmitting, so deferring costs nothing and keeps the rail change out of an
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// in-flight transmit (the CLI runs on every main-loop pass, including mid-TX).
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pa_gain_enabled = enabled;
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}
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void LoRaFEMControl::applyPAGain() {
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#ifdef P_PA1_EN
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digitalWrite(P_PA1_EN, pa_gain_enabled ? P_PA1_EN_ACTIVE : !P_PA1_EN_ACTIVE);
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#endif
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}
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bool LoRaFEMControl::canControlLNA() const {
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#ifdef P_PRIMARY_LNA_EN
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return true;
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#else
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return false;
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#endif
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}
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bool LoRaFEMControl::canControlPAGain() const {
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#ifdef P_PA1_EN
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return true;
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#else
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return false;
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#endif
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}
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