60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/**
|
|
* 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
|
|
}
|
|
|