From 8837368a14a79449cf02d32580cb54b268a08051 Mon Sep 17 00:00:00 2001
From: Thomas Klaehn <tkl@blackfinn.de>
Date: Mon, 29 Jul 2019 10:18:14 +0100
Subject: [PATCH] ADS1115: skip negative values.

---
 src/ads1115.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ads1115.c b/src/ads1115.c
index 762be90..9b12188 100644
--- a/src/ads1115.c
+++ b/src/ads1115.c
@@ -94,6 +94,9 @@ int ads1115_read_conversation_result(const struct ads1115_dev *ads1115,
         return res;
     }
     result->raw = buffer[0] << 8 | buffer[1];
+    if(result->raw & 0x8000) {
+        result->raw = 0;
+    }
     result->voltage = result->raw * VPS;
 
     return 0;