#include "17.h" int pwm_level; void matrix_init_kb(void) { // put your keyboard start-up code here // runs once when the firmware starts up matrix_init_user(); // JTAG disable for PORT F. write JTD bit twice within four cycles. MCUCR |= (1<<JTD); MCUCR |= (1<<JTD); }; void led_set_kb(uint8_t usb_led) { print("led_set\n"); } 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; }