adafruit/Adafruit_TSL2561
1
0
Fork 1
mirror of https://github.com/adafruit/Adafruit_TSL2561.git synced 2025-07-30 00:47:16 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fix negative lux value check.

Browse Source 
Rewrite negative lux value check to avoid comparing unsigned long < 0.
This commit is contained in:
mvn23
2019-04-30 20:48:52 +02:00
committed by GitHub
parent 5aac407f76
commit 655fdaefe8
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
Adafruit_TSL2561_U.cpp
View File

@ -443,10 +443,12 @@ uint32_t Adafruit_TSL2561_Unified::calculateLux(uint16_t broadband, uint16_t ir)
#endif
unsigned long temp;
temp = ((channel0 * b) - (channel1 * m));
channel0 = channel0 * b;
channel1 = channel1 * m;
temp = 0;
/* Do not allow negative lux value */
if (temp < 0) temp = 0;
if (channel0 > channel1) temp = channel0 - channel1;
/* Round lsb (2^(LUX_SCALE-1)) */
temp += (1 << (TSL2561_LUX_LUXSCALE-1));