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increase sx1262 power to 140mA

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liquidraver
2026-04-30 20:52:21 +02:00
parent f947b6b5b1
commit 8a7dacf55d
1 changed files with 11 additions and 19 deletions
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zephcore/patches/zephyr/0003-lora-sx126x-native.patch
+11 -19
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@@ -1180,30 +1180,22 @@ index 9dbf3f26586..74d4ba120c8 100644
#endif /* ZEPHYR_DRIVERS_LORA_SX126X_SX126X_INTERNAL_H_ */
diff --git a/drivers/lora/native/sx126x/sx126x_hal.c b/drivers/lora/native/sx126x/sx126x_hal.c
index 34f7089584f..e2253cf8193 100644
index 34f7089584f..c28f2659fce 100644
--- a/drivers/lora/native/sx126x/sx126x_hal.c
+++ b/drivers/lora/native/sx126x/sx126x_hal.c
@@ -203,6 +203,14 @@ int sx126x_hal_configure_tx_params(const struct device *dev, int8_t power,
int8_t tx_power;
int ret;
+ /* Save OCP register — SetPaConfig resets it to a chip default. */
+ uint8_t ocp;
+
+ ret = sx126x_hal_read_regs(dev, SX126X_REG_OCP, &ocp, 1);
+ if (ret < 0) {
+ return ret;
+ }
+
if (config->is_sx1261) {
/*
* SX1261: Low power PA, up to +15 dBm
@@ -231,6 +239,12 @@ int sx126x_hal_configure_tx_params(const struct device *dev, int8_t power,
@@ -231,6 +231,19 @@ int sx126x_hal_configure_tx_params(const struct device *dev, int8_t power,
tx_power = CLAMP(power, SX1262_MIN_POWER, SX1262_MAX_POWER);
}
+ /* Restore OCP register after SetPaConfig. */
+ ret = sx126x_hal_write_regs(dev, SX126X_REG_OCP, &ocp, 1);
+ /* SetPaConfig does not auto-update OCP on the standalone SX126x
+ * (cold-reset default is 60 mA / 0x18). The SX1262 high-power PA
+ * needs ~118 mA at +22 dBm, so OCP must be raised to 140 mA / 0x38
+ * or the PA is current-limited and output drops to ~14-16 dBm.
+ * Mirrors what the STM32WL HAL does and what RadioLib's
+ * setCurrentLimit() programs on Arduino MeshCore. */
+ uint8_t ocp_value = config->is_sx1261 ? 0x18 /* 60 mA */
+ : 0x38 /* 140 mA */;
+ ret = sx126x_hal_write_regs(dev, SX126X_REG_OCP, &ocp_value, 1);
+ if (ret < 0) {
+ return ret;
+ }