quantum/velocikey.c

   1 #include "velocikey.h"
   2 #include "timer.h"
   3 #include "eeconfig.h"
   4 #include "eeprom.h"
   5
   6 #ifndef MIN
   7 #    define MIN(a, b) (((a) < (b)) ? (a) : (b))
   8 #endif
   9 #ifndef MAX
  10 #    define MAX(a, b) (((a) > (b)) ? (a) : (b))
  11 #endif
  12
  13 #define TYPING_SPEED_MAX_VALUE 200
  14 uint8_t typing_speed = 0;
  15
  16 bool velocikey_enabled(void) { return eeprom_read_byte(EECONFIG_VELOCIKEY) == 1; }
  17
  18 void velocikey_toggle(void) {
  19     if (velocikey_enabled())
  20         eeprom_update_byte(EECONFIG_VELOCIKEY, 0);
  21     else
  22         eeprom_update_byte(EECONFIG_VELOCIKEY, 1);
  23 }
  24
  25 void velocikey_accelerate(void) {
  26     if (typing_speed < TYPING_SPEED_MAX_VALUE) typing_speed += (TYPING_SPEED_MAX_VALUE / 100);
  27 }
  28
  29 void velocikey_decelerate(void) {
  30     static uint16_t decay_timer = 0;
  31
  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();
  39     }
  40 }
  41
  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)); }