110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
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/*
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* FreeTouch, a QTouch-compatible library - tested on ATSAMD21 only!
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Limor 'ladyada' Fried for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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// This is similar to the drivers found in sam0/drivers but for the PTC.
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#ifndef ADAFRUIT_FREETOUCH_ADAFRUIT_PTC_H
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#define ADAFRUIT_FREETOUCH_ADAFRUIT_PTC_H
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#include <stdint.h>
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#include "samd21_ptc_component.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Touch library oversampling (filter) setting */
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typedef enum tag_oversample_level_t {
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OVERSAMPLE_1,
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OVERSAMPLE_2,
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OVERSAMPLE_4,
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OVERSAMPLE_8,
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OVERSAMPLE_16,
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OVERSAMPLE_32,
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OVERSAMPLE_64
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}
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oversample_t;
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/* Touch library series resistor setting */
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typedef enum tag_series_resistor_t {
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RESISTOR_0,
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RESISTOR_20K,
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RESISTOR_50K,
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RESISTOR_100K,
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}
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series_resistor_t;
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typedef enum tag_freq_mode_t {
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FREQ_MODE_NONE,
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FREQ_MODE_HOP,
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FREQ_MODE_SPREAD,
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FREQ_MODE_SPREAD_MEDIAN
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}
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freq_mode_t;
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typedef enum tag_freq_hop_t {
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FREQ_HOP_1,
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FREQ_HOP_2,
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FREQ_HOP_3,
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FREQ_HOP_4,
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FREQ_HOP_5,
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FREQ_HOP_6,
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FREQ_HOP_7,
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FREQ_HOP_8,
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FREQ_HOP_9,
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FREQ_HOP_10,
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FREQ_HOP_11,
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FREQ_HOP_12,
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FREQ_HOP_13,
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FREQ_HOP_14,
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FREQ_HOP_15,
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FREQ_HOP_16
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}
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freq_hop_t;
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struct adafruit_ptc_config {
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uint8_t pin; // ASF pin #
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int8_t yline; // the Y select line (see datasheet)
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oversample_t oversample;
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series_resistor_t seriesres;
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freq_mode_t freqhop;
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freq_hop_t hops;
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uint16_t compcap;
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uint8_t intcap;
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};
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void adafruit_ptc_get_config_default(struct adafruit_ptc_config *config);
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void adafruit_ptc_init(Ptc* module_inst, struct adafruit_ptc_config const* config);
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void adafruit_ptc_start_conversion(Ptc* module_inst, struct adafruit_ptc_config const* config);
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bool adafruit_ptc_is_conversion_finished(Ptc* module_inst);
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uint16_t adafruit_ptc_get_conversion_result(Ptc* module_inst);
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#ifdef __cplusplus
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}
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#endif
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#endif // ADAFRUIT_FREETOUCH_ADAFRUIT_PTC_H
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