Not been on here a while and stopped using my Nerd60 back light as it was just too damn bright!DanielT wrote: ↑Yes, QMK works too, MrRooks did a fork of QMK for NerD60 and had success with installing this firmware.
This is the link to his GitHub repo : https://github.com/MrRooks/qmk_firmware
You you are able to add new features please share them ! It would be nice to have fancy lights controls for NerD60 like pulsating lights, control of the underglow etc ...
I'm glad that people are finding this guide useful
Code: Select all
void backlight_init_ports()
{
/*
* The backlight LED pins PB6 and PB7 can be
* controlled through the output compare values in
* OCR1C and OCR1B.
* Counter1 is set to Fast PWM 8-bit mode with
* a prescaler divisor of 256. (WGM10, WGM12, and CS12 bits
* set in the control registers A/B)
*
* f_clk 16000000
* f = --------- = ----------- =~ 244Hz
* N*(1+TOP) 256*(1+255)
*
* The comparision port is set to low once the counter matches
* our compare value (COM1x1 bit set in control register).
* Setting the compare register (OCR1x) to BOTTOM (=0)
* results in a narrow spike for each TOP+1 cycle.
* So the comparison output is deactivated to reach
* zero output.
*/
// Timer/Counter1 Control Registers
TCCR1A |= (1<<WGM10);
TCCR1B |= (1<<WGM12) | (1<<CS12);
// Enable output pins
DDRB |= 0b11100000; // PB7 (switch), PB6 (pcb), PB5 (caps)
// PB6 and 7 are only used by output compare
PORTB &= ~0b11000000;
}
void backlight_set(uint8_t level)
{
if (level == 0) {
// Disable comparison
TCCR1A &= ~((1<<COM1C1) | (1<<COM1B1));
} else {
// Enable comparison
TCCR1A |= (1<<COM1B1) | (1<<COM1C1);
uint8_t scaled = level * level * BACKLIGHT_SCALE - 1;
OCR1B = scaled; // Output compare register 1B (PB7 - switch)
OCR1C = scaled; // Output compare register 1C (PB6 - pcb)
}
}
