Do not invert ADC1 readings when using ESP32 (#4423) (#4599)

* Do not invert ADC1 readings when using ESP32

* update CHANGELOG.md

(cherry picked from commit b3c2e45cb99e8ac268df9bbf1896f078e596e4f3)

Co-authored-by: Robin Appelman <robin@icewind.nl>

esp-hal/CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- ESP32: ADC1 readings are no longer inverted (#4423)
 
 ### Removed
 

esp-hal/src/analog/adc/esp32.rs

@@ -301,6 +301,9 @@ where
 
         // Do *not* invert the output
         // NOTE: This seems backwards, but was verified experimentally.
+        sensors
+            .sar_read_ctrl()
+            .modify(|_, w| w.sar1_data_inv().set_bit());
         sensors
             .sar_read_ctrl2()
             .modify(|_, w| w.sar2_data_inv().set_bit());