keyboards/clueboard_17/clueboard_17.c

   1 #include "clueboard_17.h"
   2
   3 int pwm_level;
   4
   5 void matrix_init_kb(void) {
   6     // put your keyboard start-up code here
   7     // runs once when the firmware starts up
   8     matrix_init_user();
   9
  10     // JTAG disable for PORT F. write JTD bit twice within four cycles.
  11     MCUCR |= (1<<JTD);
  12     MCUCR |= (1<<JTD);
  13 };
  14
  15 void led_set_kb(uint8_t usb_led)
  16 {
  17     print("led_set\n");
  18 }
  19
  20 void backlight_init_ports(void)
  21 {
  22     // Set C7 to output
  23     DDRC |= (1<<7);
  24
  25     // Initialize the timer
  26     TC4H = 0x03;
  27     OCR4C = 0xFF;
  28     TCCR4A = 0b10000010;
  29     TCCR4B = 0b00000001;
  30 }
  31
  32 void backlight_set(uint8_t level)
  33 {
  34     // Determine the PWM level
  35     switch (level)
  36     {
  37         case 0:
  38             // 33%
  39             pwm_level = 0x54;
  40             break;
  41         case 1:
  42             // 66%
  43             pwm_level = 0xA8;
  44             break;
  45         case 2:
  46             // 100%
  47             pwm_level = 0xFF;
  48             break;
  49         case 3:
  50             // 0%
  51             pwm_level = 0x00;
  52             break;
  53         default:
  54             xprintf("Unknown level: %d\n", level);
  55     }
  56
  57     // Write the PWM level to the timer
  58     TC4H = pwm_level >> 8;
  59     OCR4A = 0xFF & pwm_level;
  60 }