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Diffstat (limited to 'quantum/backlight/backlight_timer.c')
-rw-r--r--quantum/backlight/backlight_timer.c32
1 files changed, 22 insertions, 10 deletions
diff --git a/quantum/backlight/backlight_timer.c b/quantum/backlight/backlight_timer.c
index c32c35c154..82fb6a6a83 100644
--- a/quantum/backlight/backlight_timer.c
+++ b/quantum/backlight/backlight_timer.c
@@ -14,14 +14,14 @@ static uint16_t backlight_timer_get_duty(void);
14 14
15// See http://jared.geek.nz/2013/feb/linear-led-pwm 15// See http://jared.geek.nz/2013/feb/linear-led-pwm
16static uint16_t cie_lightness(uint16_t v) { 16static uint16_t cie_lightness(uint16_t v) {
17 if (v <= 5243) // if below 8% of max 17 if (v <= 5243) // if below 8% of max
18 return v / 9; // same as dividing by 900% 18 return v / 9; // same as dividing by 900%
19 else { 19 else {
20 uint32_t y = (((uint32_t)v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare 20 uint32_t y = (((uint32_t)v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
21 // to get a useful result with integer division, we shift left in the expression above 21 // to get a useful result with integer division, we shift left in the expression above
22 // and revert what we've done again after squaring. 22 // and revert what we've done again after squaring.
23 y = y * y * y >> 8; 23 y = y * y * y >> 8;
24 if (y > 0xFFFFUL) // prevent overflow 24 if (y > 0xFFFFUL) // prevent overflow
25 return 0xFFFFU; 25 return 0xFFFFU;
26 else 26 else
27 return (uint16_t)y; 27 return (uint16_t)y;
@@ -61,7 +61,9 @@ static void backlight_timer_top(void) {
61 } 61 }
62} 62}
63 63
64static void backlight_timer_cmp(void) { backlight_pins_off(); } 64static void backlight_timer_cmp(void) {
65 backlight_pins_off();
66}
65 67
66void backlight_task(void) {} 68void backlight_task(void) {}
67 69
@@ -77,7 +79,9 @@ static uint16_t breathing_counter = 0;
77static const uint8_t breathing_table[BREATHING_STEPS] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; 79static const uint8_t breathing_table[BREATHING_STEPS] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
78 80
79// Use this before the cie_lightness function. 81// Use this before the cie_lightness function.
80static inline uint16_t scale_backlight(uint16_t v) { return v / BACKLIGHT_LEVELS * get_backlight_level(); } 82static inline uint16_t scale_backlight(uint16_t v) {
83 return v / BACKLIGHT_LEVELS * get_backlight_level();
84}
81 85
82void breathing_task(void) { 86void breathing_task(void) {
83 uint8_t breathing_period = get_breathing_period(); 87 uint8_t breathing_period = get_breathing_period();
@@ -91,13 +95,17 @@ void breathing_task(void) {
91 backlight_timer_set_duty(cie_lightness(scale_backlight((uint16_t)breathing_table[index] * 256))); 95 backlight_timer_set_duty(cie_lightness(scale_backlight((uint16_t)breathing_table[index] * 256)));
92} 96}
93 97
94bool is_breathing(void) { return breathing; } 98bool is_breathing(void) {
99 return breathing;
100}
95 101
96void breathing_enable(void) { 102void breathing_enable(void) {
97 breathing_counter = 0; 103 breathing_counter = 0;
98 breathing = true; 104 breathing = true;
99} 105}
100void breathing_disable(void) { breathing = false; } 106void breathing_disable(void) {
107 breathing = false;
108}
101 109
102void breathing_pulse(void) { 110void breathing_pulse(void) {
103 backlight_set(is_backlight_enabled() ? 0 : BACKLIGHT_LEVELS); 111 backlight_set(is_backlight_enabled() ? 0 : BACKLIGHT_LEVELS);
@@ -140,8 +148,12 @@ static void timerCallback(void) {
140 } 148 }
141} 149}
142 150
143static void backlight_timer_set_duty(uint16_t duty) { s_duty = duty; } 151static void backlight_timer_set_duty(uint16_t duty) {
144static uint16_t backlight_timer_get_duty(void) { return s_duty; } 152 s_duty = duty;
153}
154static uint16_t backlight_timer_get_duty(void) {
155 return s_duty;
156}
145 157
146// ChibiOS - Map GPT timer onto Software PWM 158// ChibiOS - Map GPT timer onto Software PWM
147static void gptTimerCallback(GPTDriver *gptp) { 159static void gptTimerCallback(GPTDriver *gptp) {