keyboard/qmk/keyboards/clueboard/17/17.c
2020-12-25 15:21:40 -05:00

44 lines
830 B
C

#include "17.h"
int pwm_level;
void backlight_init_ports(void) {
// Set C7 to output
DDRC |= (1<<7);
// Initialize the timer
TC4H = 0x03;
OCR4C = 0xFF;
TCCR4A = 0b10000010;
TCCR4B = 0b00000001;
}
void backlight_set(uint8_t level) {
// Determine the PWM level
switch (level)
{
case 0:
// 33%
pwm_level = 0x54;
break;
case 1:
// 66%
pwm_level = 0xA8;
break;
case 2:
// 100%
pwm_level = 0xFF;
break;
case 3:
// 0%
pwm_level = 0x00;
break;
default:
xprintf("Unknown level: %d\n", level);
}
// Write the PWM level to the timer
TC4H = pwm_level >> 8;
OCR4A = 0xFF & pwm_level;
}