mirror of
https://github.com/openstenoproject/qmk
synced 2024-11-11 11:09:10 +00:00
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
|
|
Copyright 2016-2017 Ralf Schmitt <ralf@bunkertor.net> Rasmus Schults <rasmusx@gmail.com>
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <avr/interrupt.h>
|
|
#include <avr/io.h>
|
|
#include <stdbool.h>
|
|
#include <util/delay.h>
|
|
|
|
#define T1H 900
|
|
#define T1L 600
|
|
#define T0H 400
|
|
#define T0L 900
|
|
#define RES 6000
|
|
|
|
#define NS_PER_SEC (1000000000L)
|
|
#define CYCLES_PER_SEC (F_CPU)
|
|
#define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
|
|
#define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)
|
|
|
|
void send_bit_d4(bool bitVal) {
|
|
if(bitVal) {
|
|
asm volatile (
|
|
"sbi %[port], %[bit] \n\t"
|
|
".rept %[onCycles] \n\t"
|
|
"nop \n\t"
|
|
".endr \n\t"
|
|
"cbi %[port], %[bit] \n\t"
|
|
".rept %[offCycles] \n\t"
|
|
"nop \n\t"
|
|
".endr \n\t"
|
|
::
|
|
[port] "I" (_SFR_IO_ADDR(PORTD)),
|
|
[bit] "I" (4),
|
|
[onCycles] "I" (NS_TO_CYCLES(T1H) - 2),
|
|
[offCycles] "I" (NS_TO_CYCLES(T1L) - 2));
|
|
} else {
|
|
asm volatile (
|
|
"sbi %[port], %[bit] \n\t"
|
|
".rept %[onCycles] \n\t"
|
|
"nop \n\t"
|
|
".endr \n\t"
|
|
"cbi %[port], %[bit] \n\t"
|
|
".rept %[offCycles] \n\t"
|
|
"nop \n\t"
|
|
".endr \n\t"
|
|
::
|
|
[port] "I" (_SFR_IO_ADDR(PORTD)),
|
|
[bit] "I" (4),
|
|
[onCycles] "I" (NS_TO_CYCLES(T0H) - 2),
|
|
[offCycles] "I" (NS_TO_CYCLES(T0L) - 2));
|
|
}
|
|
}
|
|
|
|
void show(void) {
|
|
_delay_us((RES / 1000UL) + 1);
|
|
}
|
|
|
|
void send_value(uint8_t byte) {
|
|
for(uint8_t b = 0; b < 8; b++) {
|
|
send_bit_d4(byte & 0b10000000);
|
|
byte <<= 1;
|
|
}
|
|
}
|
|
|
|
void send_color(uint8_t r, uint8_t g, uint8_t b) {
|
|
send_value(g);
|
|
send_value(r);
|
|
send_value(b);
|
|
}
|
|
|
|
void indicator_leds_set(bool leds[8]) {
|
|
cli();
|
|
send_color(leds[1] ? 255 : 0, leds[2] ? 255 : 0, leds[0] ? 255 : 0);
|
|
send_color(leds[4] ? 255 : 0, leds[5] ? 255 : 0, leds[3] ? 255 : 0);
|
|
send_color(leds[6] ? 255 : 0, leds[7] ? 255 : 0, 0);
|
|
sei();
|
|
show();
|
|
}
|