diff options
author | Christian Pointner <equinox@spreadspace.org> | 2014-10-21 17:38:37 +0200 |
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committer | Christian Pointner <equinox@spreadspace.org> | 2014-10-21 17:38:37 +0200 |
commit | dc0763f22c65aef5203e1dd1bc32d85607e4c1f9 (patch) | |
tree | 8fe480f4fab8f804f47ccd8fb92984d915b3c6ef /dolmetsch-ctl/eventqueue.c | |
parent | added usb-freq (diff) |
added dolmetsch-ctl
Diffstat (limited to 'dolmetsch-ctl/eventqueue.c')
-rw-r--r-- | dolmetsch-ctl/eventqueue.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/dolmetsch-ctl/eventqueue.c b/dolmetsch-ctl/eventqueue.c new file mode 100644 index 0000000..26f64fc --- /dev/null +++ b/dolmetsch-ctl/eventqueue.c @@ -0,0 +1,50 @@ +/* + * spreadspace avr utils + * + * + * Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org> + * + * This file is part of spreadspace avr utils. + * + * spreadspace avr utils 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 3 of the License, or + * any later version. + * + * spreadspace avr utils 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 spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <LUFA/Drivers/Misc/RingBuffer.h> +#include "eventqueue.h" + +static RingBuffer_t event_queue; +static uint8_t event_queue_data[16]; + +void eventqueue_init(void) +{ + RingBuffer_InitBuffer(&event_queue, event_queue_data, sizeof(event_queue_data)); +} + +uint8_t eventqueue_pop(uint8_t* key, uint8_t* state) +{ + if (RingBuffer_IsEmpty(&event_queue)) + return 0; + + uint8_t event = RingBuffer_Remove(&event_queue); + *state = (event & 0x80) ? 1 : 0; + *key = event & 0x7F; + return 1; +} + +void eventqueue_push(uint8_t key, uint8_t state) +{ + uint8_t event = (state) ? 0x80 : 0; + event |= (key & 0x7F); + RingBuffer_Insert(&event_queue, event); +} |