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xiao-ble: add initial support for the Xiao BLE + Ebyte E22-900M30S (#2633)

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Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
This commit is contained in:
andrew-moroz
2023-07-21 21:37:00 -04:00
committed by GitHub
parent 084ad1b722
commit 1c74479555
11 changed files with 639 additions and 3 deletions
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19
src/mesh/SX126xInterface.cpp
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@@ -70,12 +70,25 @@ template <typename T> bool SX126xInterface<T>::init()
#endif
#if defined(SX126X_TXEN) && (SX126X_TXEN != RADIOLIB_NC)
// lora.begin sets Dio2 as RF switch control, which is not true if we are manually controlling RX and TX
// If SX126X_TXEN is connected to the MCU, we are manually controlling RX and TX.
// But lora.begin (called above) sets Dio2 as RF switch control, which is not true here, so set it back to false.
if (res == RADIOLIB_ERR_NONE) {
LOG_DEBUG("SX126X_TX/RX EN pins defined. Setting RF Switch: RXEN=%i, TXEN=%i\n", SX126X_RXEN, SX126X_TXEN);
LOG_DEBUG("SX126X_TXEN pin defined. Setting RF Switch: RXEN=%i, TXEN=%i\n", SX126X_RXEN, SX126X_TXEN);
res = lora.setDio2AsRfSwitch(false);
lora.setRfSwitchPins(SX126X_RXEN, SX126X_TXEN);
}
#elif defined(SX126X_RXEN) && (SX126X_RXEN != RADIOLIB_NC && defined(E22_TXEN_CONNECTED_TO_DIO2))
// Otherwise, if SX126X_RXEN is connected to the MCU, and E22_TXEN_CONNECTED_TO_DIO2 is defined, we are letting the
// E22 control RX and TX via DIO2. In this configuration, the E22's TXEN and DIO2 pins are connected to each other,
// but not to the MCU.
// However, we must still connect the E22's RXEN pin to the MCU, define SX126X_RXEN accordingly, and then call
// setRfSwitchPins, otherwise RX sensitivity (observed via RSSI) is greatly diminished.
LOG_DEBUG("SX126X_RXEN and E22_TXEN_CONNECTED_TO_DIO2 are defined; value of res: %d", res);
if (res == RADIOLIB_ERR_NONE) {
LOG_DEBUG("SX126X_TXEN is RADIOLIB_NC, but SX126X_RXEN and E22_TXEN_CONNECTED_TO_DIO2 are both defined; calling "
"lora.setRfSwitchPins.");
lora.setRfSwitchPins(SX126X_RXEN, SX126X_TXEN);
}
#endif
if (config.lora.sx126x_rx_boosted_gain) {
@@ -299,4 +312,4 @@ template <typename T> bool SX126xInterface<T>::sleep()
#endif
return true;
}
}