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/**
* Backlighting code for PS2AVRGB boards (ATMEGA32A)
* Kenneth A. (github.com/krusli | krusli.me)
*/
#include "quantum.h"
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
// Port D: digital pins of the AVR chipset
#define NUMLOCK_PORT (1 << 1) // 1st pin of Port D (digital)
#define CAPSLOCK_PORT (1 << 2) // 2nd pin
#define BACKLIGHT_PORT (1 << 4) // 4th pin
#define SCROLLLOCK_PORT (1 << 6) // 6th pin
/**
* References
* Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
* TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
* Timers: http://www.avrbeginners.net/architecture/timers/timers.html
* 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
* PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
*/
// @Override
// turn LEDs on and off depending on USB caps/num/scroll lock states.
void led_set_user(uint8_t usb_led) {
/* It appears that these cause the v1 JJ40 PCB to hang.
* I haven't looked into why, but I don't have any LEDs on my board anyway. */
#if 0
if (usb_led & (1 << USB_LED_NUM_LOCK)) {
// turn on
DDRD |= NUMLOCK_PORT;
PORTD |= NUMLOCK_PORT;
} else {
// turn off
DDRD &= ~NUMLOCK_PORT;
PORTD &= ~NUMLOCK_PORT;
}
if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
DDRD |= CAPSLOCK_PORT;
PORTD |= CAPSLOCK_PORT;
} else {
DDRD &= ~CAPSLOCK_PORT;
PORTD &= ~CAPSLOCK_PORT;
}
if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
DDRD |= SCROLLLOCK_PORT;
PORTD |= SCROLLLOCK_PORT;
} else {
DDRD &= ~SCROLLLOCK_PORT;
PORTD &= ~SCROLLLOCK_PORT;
}
#endif
}
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