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Diffstat (limited to 'quantum/backlight/backlight_soft.c')
-rw-r--r--quantum/backlight/backlight_soft.c54
1 files changed, 8 insertions, 46 deletions
diff --git a/quantum/backlight/backlight_soft.c b/quantum/backlight/backlight_soft.c
index 096b41d91..8552384a4 100644
--- a/quantum/backlight/backlight_soft.c
+++ b/quantum/backlight/backlight_soft.c
@@ -9,47 +9,7 @@
9# error "Backlight breathing is not available for software PWM. Please disable." 9# error "Backlight breathing is not available for software PWM. Please disable."
10#endif 10#endif
11 11
12#ifndef BACKLIGHT_ON_STATE 12static uint16_t s_duty_pattern = 0;
13# define BACKLIGHT_ON_STATE 1
14#endif
15
16#ifdef BACKLIGHT_PINS
17# define BACKLIGHT_PIN_INIT BACKLIGHT_PINS
18#else
19# define BACKLIGHT_PIN_INIT \
20 { BACKLIGHT_PIN }
21#endif
22
23static uint16_t s_duty_pattern = 0;
24static const pin_t backlight_pins[] = BACKLIGHT_PIN_INIT;
25#define BACKLIGHT_LED_COUNT (sizeof(backlight_pins) / sizeof(pin_t))
26
27#define FOR_EACH_LED(x) \
28 for (uint8_t i = 0; i < BACKLIGHT_LED_COUNT; i++) { \
29 pin_t backlight_pin = backlight_pins[i]; \
30 { x } \
31 }
32
33void backlight_on(pin_t backlight_pin) {
34#if BACKLIGHT_ON_STATE == 0
35 writePinLow(backlight_pin);
36#else
37 writePinHigh(backlight_pin);
38#endif
39}
40
41void backlight_off(pin_t backlight_pin) {
42#if BACKLIGHT_ON_STATE == 0
43 writePinHigh(backlight_pin);
44#else
45 writePinLow(backlight_pin);
46#endif
47}
48
49void backlight_init_ports(void) {
50 // Setup backlight pin as output and output to off state.
51 FOR_EACH_LED(setPinOutput(backlight_pin); backlight_off(backlight_pin);)
52}
53 13
54// clang-format off 14// clang-format off
55 15
@@ -58,7 +18,7 @@ void backlight_init_ports(void) {
58 * We scale the current backlight level to an index within this array. This allows 18 * We scale the current backlight level to an index within this array. This allows
59 * backlight_task to focus on just switching LEDs on/off, and we can predict the duty pattern 19 * backlight_task to focus on just switching LEDs on/off, and we can predict the duty pattern
60 */ 20 */
61static uint16_t backlight_duty_table[] = { 21static const uint16_t backlight_duty_table[] = {
62 0b0000000000000000, 22 0b0000000000000000,
63 0b1000000000000000, 23 0b1000000000000000,
64 0b1000000010000000, 24 0b1000000010000000,
@@ -75,15 +35,17 @@ static uint16_t backlight_duty_table[] = {
75 35
76static uint8_t scale_backlight(uint8_t v) { return v * (backlight_duty_table_size - 1) / BACKLIGHT_LEVELS; } 36static uint8_t scale_backlight(uint8_t v) { return v * (backlight_duty_table_size - 1) / BACKLIGHT_LEVELS; }
77 37
38void backlight_init_ports(void) { backlight_pins_init(); }
39
40void backlight_set(uint8_t level) { s_duty_pattern = backlight_duty_table[scale_backlight(level)]; }
41
78void backlight_task(void) { 42void backlight_task(void) {
79 static uint8_t backlight_tick = 0; 43 static uint8_t backlight_tick = 0;
80 44
81 if (s_duty_pattern & ((uint16_t)1 << backlight_tick)) { 45 if (s_duty_pattern & ((uint16_t)1 << backlight_tick)) {
82 FOR_EACH_LED(backlight_on(backlight_pin);) 46 backlight_pins_on();
83 } else { 47 } else {
84 FOR_EACH_LED(backlight_off(backlight_pin);) 48 backlight_pins_off();
85 } 49 }
86 backlight_tick = (backlight_tick + 1) % 16; 50 backlight_tick = (backlight_tick + 1) % 16;
87} 51}
88
89void backlight_set(uint8_t level) { s_duty_pattern = backlight_duty_table[scale_backlight(level)]; }