7 # define MIN(a, b) (((a) < (b)) ? (a) : (b))
10 # define MAX(a, b) (((a) > (b)) ? (a) : (b))
13 #define TYPING_SPEED_MAX_VALUE 200
14 uint8_t typing_speed = 0;
16 bool velocikey_enabled(void) { return eeprom_read_byte(EECONFIG_VELOCIKEY) == 1; }
18 void velocikey_toggle(void) {
19 if (velocikey_enabled())
20 eeprom_update_byte(EECONFIG_VELOCIKEY, 0);
22 eeprom_update_byte(EECONFIG_VELOCIKEY, 1);
25 void velocikey_accelerate(void) {
26 if (typing_speed < TYPING_SPEED_MAX_VALUE) typing_speed += (TYPING_SPEED_MAX_VALUE / 100);
29 void velocikey_decelerate(void) {
30 static uint16_t decay_timer = 0;
32 if (timer_elapsed(decay_timer) > 500 || decay_timer == 0) {
33 if (typing_speed > 0) typing_speed -= 1;
34 // Decay a little faster at half of max speed
35 if (typing_speed > TYPING_SPEED_MAX_VALUE / 2) typing_speed -= 1;
36 // Decay even faster at 3/4 of max speed
37 if (typing_speed > TYPING_SPEED_MAX_VALUE / 4 * 3) typing_speed -= 2;
38 decay_timer = timer_read();
42 uint8_t velocikey_match_speed(uint8_t minValue, uint8_t maxValue) { return MAX(minValue, maxValue - (maxValue - minValue) * ((float)typing_speed / TYPING_SPEED_MAX_VALUE)); }