Fix 2's complement negative voltage bit mask

PaulZC · PaulZC · commit 415e9a709678 · 2024-02-11T09:37:17.000Z
diff --git a/src/SparkFun_ADS1219.cpp b/src/SparkFun_ADS1219.cpp
@@ -135,7 +135,7 @@ bool SfeADS1219Driver::readConversion()
         iu32.u32 = (iu32.u32 << 8) | rawBytes[1];
         iu32.u32 = (iu32.u32 << 8) | rawBytes[2];
         // Preserve the 2's complement.
-        if (0x00100000 == (iu32.u32 & 0x00100000))
+        if (0x00800000 == (iu32.u32 & 0x00800000))
             iu32.u32 = iu32.u32 | 0xFF000000;
         _adcResult = iu32.i32; // Store the signed result
     }

Original file line number	Diff line number	Diff line change
`@@ -135,7 +135,7 @@ bool SfeADS1219Driver::readConversion()`
`135`	`135`	`iu32.u32 = (iu32.u32 << 8) \| rawBytes[1];`
`136`	`136`	`iu32.u32 = (iu32.u32 << 8) \| rawBytes[2];`
`137`	`137`	`// Preserve the 2's complement.`
`138`		`- if (0x00100000 == (iu32.u32 & 0x00100000))`
	`138`	`+ if (0x00800000 == (iu32.u32 & 0x00800000))`
`139`	`139`	`iu32.u32 = iu32.u32 \| 0xFF000000;`
`140`	`140`	`_adcResult = iu32.i32; // Store the signed result`
`141`	`141`	`}`