2 Copyright 2016-2017 Ralf Schmitt <ralf@bunkertor.net> Rasmus Schults <rasmusx@gmail.com>
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #include <avr/interrupt.h>
20 #include <util/delay.h>
28 #define NS_PER_SEC (1000000000L)
29 #define CYCLES_PER_SEC (F_CPU)
30 #define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
31 #define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)
33 void send_bit_d4(bool bitVal) {
36 "sbi %[port], %[bit] \n\t"
37 ".rept %[onCycles] \n\t"
40 "cbi %[port], %[bit] \n\t"
41 ".rept %[offCycles] \n\t"
45 [port] "I" (_SFR_IO_ADDR(PORTD)),
47 [onCycles] "I" (NS_TO_CYCLES(T1H) - 2),
48 [offCycles] "I" (NS_TO_CYCLES(T1L) - 2));
51 "sbi %[port], %[bit] \n\t"
52 ".rept %[onCycles] \n\t"
55 "cbi %[port], %[bit] \n\t"
56 ".rept %[offCycles] \n\t"
60 [port] "I" (_SFR_IO_ADDR(PORTD)),
62 [onCycles] "I" (NS_TO_CYCLES(T0H) - 2),
63 [offCycles] "I" (NS_TO_CYCLES(T0L) - 2));
68 _delay_us((RES / 1000UL) + 1);
71 void send_value(uint8_t byte) {
72 for(uint8_t b = 0; b < 8; b++) {
73 send_bit_d4(byte & 0b10000000);
78 void send_color(uint8_t r, uint8_t g, uint8_t b) {
84 void indicator_leds_set(bool leds[8]) {
86 send_color(leds[1] ? 255 : 0, leds[2] ? 255 : 0, leds[0] ? 255 : 0);
87 send_color(leds[4] ? 255 : 0, leds[5] ? 255 : 0, leds[3] ? 255 : 0);
88 send_color(leds[6] ? 255 : 0, leds[7] ? 255 : 0, 0);