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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 drivers/ginput/dial/GADC/ginput_lld_dial.c
* @brief GINPUT Dial low level driver source for GADC hardware.
*
* @defgroup Dial Dial
* @ingroup GINPUT
* @{
*/
#include "ch.h"
#include "hal.h"
#include "gfx.h"
#if GFX_USE_GINPUT && GINPUT_NEED_DIAL
#include "ginput/lld/dial.h"
#if GINPUT_DIAL_NUM_PORTS >= 5
#error "GINPUT: Dial - GADC driver currently only supports 4 devices"
#endif
static adcsample_t samplebuf[GINPUT_DIAL_NUM_PORTS];
#if GINPUT_DIAL_CYCLE_POLL
static uint16_t cycle;
#endif
static void GADCCallback(adcsample_t *buffer, void *param) {
((DialCallbackFn)param)(buffer-samplebuf, buffer[0]);
}
void ginput_lld_dial_init(void) {
#if GINPUT_DIAL_CYCLE_POLL
cycle = 0;
#endif
}
void ginput_lld_dial_poll(DialCallbackFn fn) {
#if GINPUT_DIAL_CYCLE_POLL
switch(cycle++) {
#if GINPUT_DIAL_NUM_PORTS >= 1
case 0:
gadcLowSpeedStart(GINPUT_DIAL_DEVICE0, samplebuf+0, GADCCallback, (void *)fn);
break;
#endif
#if GINPUT_DIAL_NUM_PORTS >= 2
case 1:
gadcLowSpeedStart(GINPUT_DIAL_DEVICE1, samplebuf+1, GADCCallback, (void *)fn);
break;
#endif
#if GINPUT_DIAL_NUM_PORTS >= 3
case 2:
gadcLowSpeedStart(GINPUT_DIAL_DEVICE2, samplebuf+2, GADCCallback, (void *)fn);
break;
#endif
#if GINPUT_DIAL_NUM_PORTS >= 4
case 3:
gadcLowSpeedStart(GINPUT_DIAL_DEVICE3, samplebuf+3, GADCCallback, (void *)fn);
break;
#endif
}
if (cycle >= GINPUT_DIAL_NUM_PORTS)
cycle = 0;
#else
#if GINPUT_DIAL_NUM_PORTS >= 1
gadcLowSpeedStart(GINPUT_DIAL_DEVICE0, samplebuf+0, GADCCallback, (void *)fn);
#endif
#if GINPUT_DIAL_NUM_PORTS >= 2
gadcLowSpeedStart(GINPUT_DIAL_DEVICE1, samplebuf+1, GADCCallback, (void *)fn);
#endif
#if GINPUT_DIAL_NUM_PORTS >= 3
gadcLowSpeedStart(GINPUT_DIAL_DEVICE2, samplebuf+2, GADCCallback, (void *)fn);
#endif
#if GINPUT_DIAL_NUM_PORTS >= 4
gadcLowSpeedStart(GINPUT_DIAL_DEVICE3, samplebuf+3, GADCCallback, (void *)fn);
#endif
#endif
}
#endif /* GFX_USE_GINPUT && GINPUT_NEED_DIAL */
/** @} */
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