mirror of
https://github.com/raphnet/gc_n64_usb-v3
synced 2024-12-22 07:18:52 -05:00
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
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/* gc_n64_usb : Gamecube or N64 controller to USB firmware
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Copyright (C) 2007-2016 Raphael Assenat <raph@raphnet.net>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <avr/io.h>
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#include "intervaltimer2.h"
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void intervaltimer2_init(void)
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{
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TCCR0A = (1<<WGM01);
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TCCR0B = (1<<CS02) | (1<<CS00); // CTC, /1024 prescaler
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}
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void intervaltimer2_set16ms(void)
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{
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int interval_ms = 16;
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// Maximum 16ms. 17ms overflows the 8-bit OCR0A register (value of 265)
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// 16ms: 250
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TCNT0 = 0;
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OCR0A = interval_ms * (F_CPU/1024) / 1000;
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}
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char intervaltimer2_get(void)
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{
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if (TIFR0 & (1<<OCF0A)) {
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TIFR0 = 1<<OCF0A;
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return 1;
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}
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return 0;
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}
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