bded0a07d9
Added C source for rotary angle sensor
* Renamed all files from groverrotary to rotary
* Replaced all instances of groverrotary with rotary
* Added C source for rotary angle sensor
* Updated all CMake files
Signed-off-by: Sisinty Sasmita Patra <sisinty.s.patra@intel.com>
79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
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* Author: Brendan Le Foll <brendan.le.foll@intel.com>
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* Sisinty Sasmita Patra <sisinty.s.patra@intel.com>
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*
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* Copyright (c) 2016 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "rotary.h"
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rotary_context rotary_init(int pin, float aRef)
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{
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rotary_context dev = (rotary_context)malloc(sizeof(struct _rotary_context));
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if(dev == NULL) return NULL;
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dev->aio = mraa_aio_init(pin);
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if(dev->aio == NULL){
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free(dev);
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return NULL;
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}
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dev->m_aRef = aRef;
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// get adc bit range
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dev->m_aRes = (1 << mraa_aio_get_bit(dev->aio));
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return dev;
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}
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void rotary_close(rotary_context dev)
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{
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mraa_aio_close(dev->aio);
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free(dev);
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}
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upm_result_t rotary_get_value_voltage (const rotary_context dev,
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float* volts)
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{
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float val = 0.0;
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val = mraa_aio_read(dev->aio);
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*volts = (dev->m_aRef / dev->m_aRes) * (float)val;
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return UPM_SUCCESS;
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}
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upm_result_t rotary_get_value_angle (rotary_context dev, float* rotval)
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{
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float val = 0.0;
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val = mraa_aio_read(dev->aio);
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// return degrees
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*rotval = val * (float)ROTARY_MAX_ANGLE / dev->m_aRes;
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return UPM_SUCCESS;
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}
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