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Changed LED smooth transition to two intervals

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This commit is contained in:
mj 2021-11-18 22:29:25 +01:00
parent 0061723472
commit 3912a22467
1 changed files with 15 additions and 3 deletions
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18
fw/Core/Src/main.c
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@ -902,16 +902,28 @@ void CO2_to_color(uint16_t co2, uint16_t co2_limit_yellow, uint16_t co2_limit_re
{
const uint16_t co2_limit_green = 400; /* fresh air, lowest possible value */
uint32_t co2_full_span;
uint32_t co2_interval_length;
uint32_t co2_lower_limit;
uint32_t intensity;
uint32_t intensity_offset;
if (co2 < co2_limit_green) {
rgbled_set_color(RGBLED_GREEN);
} else if (co2 > co2_limit_red) {
rgbled_set_color(RGBLED_RED);
} else {
co2_full_span = co2_limit_red - co2_limit_green;
intensity = (co2 - co2_limit_green) * 255 / co2_full_span;
if (co2 < co2_limit_yellow) {
/* first interval: from green to yellow (co2_alert_limit1) */
co2_interval_length = co2_limit_yellow - co2_limit_green;
co2_lower_limit = co2_limit_green;
intensity_offset = 0;
} else {
/* second interval: from yellow to red (co2_alert_limit2) */
co2_interval_length = co2_limit_red - co2_limit_yellow;
co2_lower_limit = co2_limit_yellow;
intensity_offset = 127;
}
intensity = (co2 - co2_lower_limit) * 128 / co2_interval_length + intensity_offset;
rgbled_set_color(intensity, 255 - intensity, 0);
}
}