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/*
ChibiOS/GFX - Copyright (C) 2012, 2013
Joel Bodenmann aka Tectu <joel@unormal.org>
This file is part of ChibiOS/GFX.
ChibiOS/GFX 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
(at your option) any later version.
ChibiOS/GFX 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/>.
*/
/**
* @file src/gaudin/gaudin.c
* @brief GAUDIN sub-system code.
*
* @addtogroup GAUDIN
* @{
*/
#include "ch.h"
#include "hal.h"
#include "gfx.h"
#if GFX_USE_GAUDIN
/* Include the driver defines */
#include "gaudin/lld/gaudin_lld.h"
static gaudin_params aud;
static BinarySemaphore *paudSem;
static GEventAudioIn *paudEvent;
static audin_sample_t *lastbuffer;
static size_t lastcount;
static uint16_t audFlags;
#define AUDFLG_RUNNING 0x0001
#define AUDFLG_USE_EVENTS 0x0002
#if GFX_USE_GEVENT
static GTIMER_DECL(AudGTimer);
static void AudGTimerCallback(void *param) {
(void) param;
GSourceListener *psl;
GEventADC *pe;
psl = 0;
while ((psl = geventGetSourceListener((GSourceHandle)(&aud), psl))) {
if (!(pe = (GEventAudioIn *)geventGetEventBuffer(psl))) {
// This listener is missing - save this.
psl->srcflags |= GADC_AUDIO_IN_LOSTEVENT;
continue;
}
pe->type = GEVENT_AUDIO_IN;
pe->channel = aud.channel;
pe->count = lastcount;
pe->buffer = lastbuffer;
pe->flags = psl->srcflags;
psl->srcflags = 0;
geventSendEvent(psl);
}
}
#endif
void GAUDIN_ISR_CompleteI(audin_sample_t *buffer, size_t n) {
/* Save the details */
lastcount = n;
lastbuffer = buffer;
/* Signal the user with the data */
if (paudEvent) {
#if GFX_USE_GEVENT
paudEvent->type = GEVENT_AUDIO_IN;
#endif
paudEvent->channel = aud.channel;
paudEvent->count = lastcount;
paudEvent->buffer = lastbuffer;
paudEvent->flags = 0;
}
/* Our two signalling mechanisms */
if (paudSem)
chBSemSignalI(paudSem);
#if GFX_USE_GEVENT
if (audFlags & AUDFLG_USE_EVENTS)
gtimerJabI(&AudGTimer);
#endif
}
void GAUDIN_ISR_ErrorI(void) {
/* Ignore any errors for now */
}
bool_t gaudinInit(uint16_t channel, uint32_t frequency, audin_sample_t *buffer, size_t bufcount, size_t samplesPerEvent) {
/* Check the channel is valid */
if (channel >= GAUDIN_NUM_CHANNELS || frequency > GAUDIN_MAX_SAMPLE_FREQUENCY)
return FALSE;
/* Stop any existing transfers */
if ((audFlags & AUDFLG_RUNNING))
gadc_lld_stop();
audFlags = 0;
/* Initialise everything */
aud.channel = channel;
aud.frequency = frequency;
aud.buffer = buffer;
aud.bufcount = bufcount;
aud.samplesPerEvent = samplesPerEvent;
paudSem = 0;
paudEvent = 0;
/* Set up the low level driver */
gaudin_lld_init(&aud);
return TRUE;
}
#if GFX_USE_GEVENT
GSourceHandle gaudinGetSource(void) {
if (!gtimerIsActive(&AudGTimer))
gtimerStart(&AudGTimer, AudGTimerCallback, NULL, TRUE, TIME_INFINITE);
audFlags |= AUDFLG_USE_EVENTS;
return (GSourceHandle)&aud;
}
#endif
void gaudinSetBSem(BinarySemaphore *pbsem, GEventAudioIn *pEvent) {
chSysLock();
paudSem = pbsem;
paudEvent = pEvent;
chSysUnlock();
}
void gaudinStart(void) {
if (!(audFlags & AUDFLG_RUNNING)) {
audFlags |= AUDFLG_RUNNING;
gadc_lld_start();
}
}
void gaudinStop(void) {
if ((audFlags & AUDFLG_RUNNING)) {
gadc_lld_stop();
audFlags &= ~AUDFLG_RUNNING;
}
}
#endif /* GFX_USE_GAUDIN */
/** @} */
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