ADC: AnalogBufferDMA.h Source File

ADC 8.0 Analog to Digital Conversor library for the Teensy 3.1/3.2 microprocessor

AnalogBufferDMA.h
1 /* Teensy 3.x, LC, 4.0 ADC library
2 * https://github.com/pedvide/ADC
3 * Copyright (c) 2019 Pedro Villanueva
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 */
25
26 #ifndef ANALOGBUFFERDMA_H
27 #define ANALOGBUFFERDMA_H
28
29 #include "DMAChannel.h"
30 #include "ADC.h"
31 // lets wrap some of our Dmasettings stuff into helper class
32 class AnalogBufferDMA {
33 // keep our settings and the like:
34 public: // At least temporary to play with dma settings.
35 #ifndef KINETISL
36 DMASetting _dmasettings_adc[2];
37 #endif
38 DMAChannel _dmachannel_adc;
39
40 static AnalogBufferDMA *_activeObjectPerADC[2];
41 static void adc_0_dmaISR();
42 static void adc_1_dmaISR();
43 void processADC_DMAISR();
44 public:
45
46 AnalogBufferDMA(volatile uint16_t *buffer1, uint16_t buffer1_count,
47 volatile uint16_t *buffer2 = nullptr, uint16_t buffer2_count = 0) :
48 _buffer1(buffer1), _buffer1_count(buffer1_count), _buffer2(buffer2), _buffer2_count(buffer2_count) {};
49
50 void init(ADC *adc, int8_t adc_num = -1);
51
52 void stopOnCompletion(bool stop_on_complete);
53 inline bool stopOnCompletion(void) {return _stop_on_completion;}
54 bool clearCompletion();
55 inline volatile uint16_t *bufferLastISRFilled() {return (!_buffer2 || (_interrupt_count & 1))? _buffer1 : _buffer2;}
56 inline uint16_t bufferCountLastISRFilled() {return (!_buffer2 || (_interrupt_count & 1))? _buffer1_count : _buffer2_count;}
57 inline uint32_t interruptCount() {return _interrupt_count;}
58 inline uint32_t interruptDeltaTime() {return _interrupt_delta_time;}
59 inline bool interrupted() {return _interrupt_delta_time != 0;}
60 inline void clearInterrupt() {_interrupt_delta_time = 0;}
61 inline void userData(uint32_t new_data) {_user_data = new_data;}
62 inline uint32_t userData(void) {return _user_data;}
63 protected:
64
65 volatile uint32_t _interrupt_count = 0;
66 volatile uint32_t _interrupt_delta_time;
67 volatile uint32_t _last_isr_time;
68
69 volatile uint16_t *_buffer1;
70 uint16_t _buffer1_count;
71 volatile uint16_t *_buffer2;
72 uint16_t _buffer2_count;
73 uint32_t _user_data = 0;
74 bool _stop_on_completion = false;
75 };
76
77 #endif
ADC
Definition: ADC.h:68