minimize value after gamme correction to 1 to prevent LED off during …

…dimming
xoseperez · Nov 17, 2018 · e1f2e98 · e1f2e98
1 parent 8979b75
commit e1f2e98
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/code/espurna/light.ino b/code/espurna/light.ino
@@ -383,7 +383,7 @@ unsigned int _toPWM(unsigned long value, bool gamma, bool reverse) {
     } else if (value == LIGHT_MAX_VALUE) {
         value = LIGHT_LIMIT_PWM;
     } else if (gamma) {
-        value = pow(((float)value/LIGHT_MAX_VALUE),_light_gamma)*LIGHT_LIMIT_PWM;
+        value = std::max(1UL, (unsigned long)pow(((float)value/LIGHT_MAX_VALUE),_light_gamma)*LIGHT_LIMIT_PWM);
     } else {
         if (LIGHT_MAX_VALUE != LIGHT_LIMIT_PWM) value = map(value, 0, LIGHT_MAX_VALUE, 0, LIGHT_LIMIT_PWM);
     }