diff options
Diffstat (limited to 'power_mgt.cpp')
| -rw-r--r-- | power_mgt.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/power_mgt.cpp b/power_mgt.cpp index 95f98e5e..e197755f 100644 --- a/power_mgt.cpp +++ b/power_mgt.cpp @@ -77,6 +77,22 @@ uint32_t calculate_unscaled_power_mW( const CRGB* ledbuffer, uint16_t numLeds ) } +uint8_t calculate_max_brightness_for_power_vmA(const CRGB* ledbuffer, uint16_t numLeds, uint8_t target_brightness, uint32_t max_power_V, uint32_t max_power_mA) { + return calculate_max_brightness_for_power_mW(ledbuffer, numLeds, target_brightness, max_power_V * max_power_mA); +} + +uint8_t calculate_max_brightness_for_power_mW(const CRGB* ledbuffer, uint16_t numLeds, uint8_t target_brightness, uint32_t max_power_mW) { + uint32_t total_mW = calculate_unscaled_power_mW( ledbuffer, numLeds); + + uint32_t requested_power_mW = ((uint32_t)total_mW * target_brightness) / 256; + + uint8_t recommended_brightness = target_brightness; + if(requested_power_mW > max_power_mW) { + recommended_brightness = (uint32_t)((uint8_t)(target_brightness) * (uint32_t)(max_power_mW)) / ((uint32_t)(requested_power_mW)); + } + + return recommended_brightness; +} // sets brightness to // - no more than target_brightness |