Merge pull request #4 from BlitzCityDIY/main

18-bit fix
adafruit · Jan 11, 2024 · 975d1af · 975d1af
2 parents ebdc0da + 45636e2
commit 975d1af
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/adafruit_mcp3421/mcp3421.py b/adafruit_mcp3421/mcp3421.py
@@ -218,7 +218,6 @@ def read(self) -> int:
             adc_value = (
                 (self.adc_data[0] << 16) | (self.adc_data[1] << 8) | self.adc_data[2]
             )
-        if self.adc_data[0] & 0x02:  # Extend the sign if the top bit is set
-            adc_value |= 0xFF000000
-
+            if self.adc_data[0] & 0x80:  # Extend the sign if the top bit is set
+                adc_value = adc_value - 0x1000000  # Sign-extend to 32 bits
         return adc_value