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/*
* This source code form is a part of the ChibiOS/GFX project and stands
* under the terms of the GFX License v1.0. If a copy of the license
* was not distributed with this file, You can obtain one at:
*
* http://chibios-gfx.com/license.html
*
*/
/**
* @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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