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add led emission normalization

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This commit is contained in:
merlokk
2019-01-21 17:09:51 +02:00
parent dffc1833cb
commit c3b4806e85
3 changed files with 33 additions and 9 deletions
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31
targets/stm32l432/src/led.c
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@@ -29,20 +29,39 @@
#include "device.h"
#include "log.h"
// normalization formula: 16.06*x^0.33 = (0%-100%)
// here values: value * 10
uint8_t norm_k[] = {
0, 80, 101, 115, 127, 137, 145, 153, 159, 166,
172, 177, 182, 187, 192, 196, 200, 205, 208, 212,
216, 219, 223, 226, 229, 232, 235, 238, 241, 245};
#define norm_k_len sizeof(norm_k)
uint32_t led_normalization(uint8_t value)
{
if (value > norm_k_len - 1)
{
return value * 10;
} else {
return norm_k[value];
}
}
void led_rgb(uint32_t hex)
{
uint32_t r = hex >> 16;
uint32_t g = (hex >> 8)&0xff;
uint32_t b = hex & 0xff;
uint32_t r = led_normalization((hex >> 16) & 0xff);
uint32_t g = led_normalization((hex >> 8) & 0xff);
uint32_t b = led_normalization(hex & 0xff);
// CCR2 == blue
// CCR3 == red
// CCR4 == green
// map and scale colors
TIM2->CCR2 = 1000 - (b * 1000)/(256);
TIM2->CCR3 = 1000 - (r * 1000)/(256*6);
TIM2->CCR4 = 1000 - (g * 1000)/(256);
// normalization table values: value * 10
TIM2->CCR2 = 1000 - (b * 100)/(256);
TIM2->CCR3 = 1000 - (r * 100)/(256*6);
TIM2->CCR4 = 1000 - (g * 100)/(256);
}
void led_test_colors()