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) {
  17     return eeprom_read_byte(EECONFIG_VELOCIKEY) == 1;
  18 }
  19
  20 void velocikey_toggle(void) {
  21     if (velocikey_enabled())
  22         eeprom_update_byte(EECONFIG_VELOCIKEY, 0);
  23     else
  24         eeprom_update_byte(EECONFIG_VELOCIKEY, 1);
  25 }
  26
  27 void velocikey_accelerate(void) {
  28     if (typing_speed < TYPING_SPEED_MAX_VALUE) typing_speed += (TYPING_SPEED_MAX_VALUE / 100);
  29 }
  30
  31 void velocikey_decelerate(void) {
  32   static uint16_t decay_timer = 0;
  33
  34   if (timer_elapsed(decay_timer) > 500 || decay_timer == 0) {
  35     if (typing_speed > 0) typing_speed -= 1;
  36     //Decay a little faster at half of max speed
  37     if (typing_speed > TYPING_SPEED_MAX_VALUE / 2) typing_speed -= 1;
  38     //Decay even faster at 3/4 of max speed
  39     if (typing_speed > TYPING_SPEED_MAX_VALUE / 4 * 3) typing_speed -= 2;
  40     decay_timer = timer_read();
  41   }
  42 }
  43
  44 uint8_t velocikey_match_speed(uint8_t minValue, uint8_t maxValue) {
  45   return MAX(minValue, maxValue - (maxValue - minValue) * ((float)typing_speed / TYPING_SPEED_MAX_VALUE));
  46 }