diff options
Diffstat (limited to 'src/ginput/dial.c')
| -rw-r--r-- | src/ginput/dial.c | 202 |
1 files changed, 166 insertions, 36 deletions
diff --git a/src/ginput/dial.c b/src/ginput/dial.c index 60bc9ae8..2f572cf8 100644 --- a/src/ginput/dial.c +++ b/src/ginput/dial.c @@ -1,36 +1,166 @@ -/*
- 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/ginput/dial.c
- * @brief GINPUT dial code.
- *
- * @defgroup Dial Dial
- * @ingroup GINPUT
- * @{
- */
-#include "ch.h"
-#include "hal.h"
-#include "gfx.h"
-
-#if (GFX_USE_GINPUT && GINPUT_NEED_DIAL) || defined(__DOXYGEN__)
- #error "GINPUT: GINPUT_NEED_DIAL - Not Implemented Yet"
-#endif /* GFX_USE_GINPUT && GINPUT_NEED_DIAL */
-/** @} */
+/* + 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/ginput/dial.c + * @brief GINPUT dial code. + * + * @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" + +static GTIMER_DECL(DialTimer); +static struct DialStatus_t { + uint16_t sensitivity; + uint16_t lastvalue; + uint16_t max; +} DialStatus[GINPUT_DIAL_NUM_PORTS]; + +// The reading callback function +static void DialCallback(uint16_t instance, uint16_t rawvalue) { + struct DialStatus_t *pds; + GSourceListener *psl; + GEventDial *pe; + + /* Get the information we need */ + pds = DialStatus+instance; + + /* Range scale - if needed */ + if (pds->max != GINPUT_DIAL_MAX_VALUE) + rawvalue = (uint16_t)((uint32_t)rawvalue * pds->max / GINPUT_DIAL_MAX_VALUE); + + /* Forget about changes below our sensitivity threshold */ + if (rawvalue >= pds->lastvalue) { + if (rawvalue - pds->lastvalue < pds->sensitivity) return; + } else { + if (pds->lastvalue - rawvalue < pds->sensitivity) return; + } + + /* Save the value */ + pds->lastvalue = rawvalue; + + // Send the event to the listeners that are interested. + psl = 0; + while ((psl = geventGetSourceListener((GSourceHandle)(DialStatus+instance), psl))) { + if (!(pe = (GEventDial *)geventGetEventBuffer(psl))) + continue; + pe->type = GEVENT_DIAL; + pe->instance = instance; + pe->value = pds->lastvalue; + geventSendEvent(psl); + } +} + +GSourceHandle ginputGetDial(uint16_t instance) { + struct DialStatus_t *pds; + + if (instance >= GINPUT_DIAL_NUM_PORTS) + return 0; + + // Do we need to initialise the dial subsystem? + if (!gtimerIsActive(&DialTimer)) { + for(pds = DialStatus; pds < DialStatus+GINPUT_DIAL_NUM_PORTS; pds++) { + pds->max = GINPUT_DIAL_MAX_VALUE; +#if GINPUT_DIAL_MAX_VALUE < 100 + pds->sensitivity = 1; +#else + pds->sensitivity = GINPUT_DIAL_MAX_VALUE/100; +#endif + pds->lastvalue = 0; + } + ginput_lld_dial_init(); + gtimerStart(&DialTimer, (GTimerFunction)ginput_lld_dial_poll, DialCallback, TRUE, GINPUT_DIAL_POLL_PERIOD); + } + + // OK - return this input + return (GSourceHandle)(DialStatus+instance); +} + +void ginputResetDialRange(uint16_t instance) { + if (instance >= GINPUT_DIAL_NUM_PORTS) + return; + + ginputSetDialRange(instance, GINPUT_DIAL_MAX_VALUE); +} + +uint16_t ginputGetDialRange(uint16_t instance) { + if (instance >= GINPUT_DIAL_NUM_PORTS) + return 0; + + return DialStatus[instance].max; +} + +void ginputSetDialRange(uint16_t instance, uint16_t max) { + struct DialStatus_t *pds; + + if (instance >= GINPUT_DIAL_NUM_PORTS) + return; + + pds = DialStatus+instance; + + // Rescale the last value and the sensitivity + if (max != pds->max) { + pds->lastvalue = (uint16_t)((uint32_t)pds->lastvalue * max / pds->max); + pds->sensitivity = (uint16_t)((uint32_t)pds->sensitivity * max / pds->max); + pds->max = max; + } +} + +/** + * @brief Set the level change required before a dial even is generated (threshold) + * @note This is done after range scaling + * + * @param[in] instance The ID of the dial input instance + * @param[in] diff The amount of level changes + */ +void ginputSetDialSensitivity(uint16_t instance, uint16_t diff) { + if (instance >= GINPUT_DIAL_NUM_PORTS) + return; + + DialStatus[instance].sensitivity = diff; +} + +/** + * @brief Get the current dial status + * + * @param[in] instance The ID of the dial input instance + * @param[in] pdial The dial event struct + * + * @return Returns FALSE on an error (eg invalid instance) + */ +bool_t ginputGetDialStatus(uint16_t instance, GEventDial *pdial) { + if (instance >= GINPUT_DIAL_NUM_PORTS) + return FALSE; + pdial->type = GEVENT_DIAL; + pdial->instance = instance; + pdial->value = DialStatus[instance].lastvalue; + return TRUE; +} + +#endif /* GFX_USE_GINPUT && GINPUT_NEED_DIAL */ +/** @} */ |