ae30a1e5aa
This PR refines the _bleio API. It was originally motivated by the addition of a new CircuitPython service that enables reading and modifying files on the device. Moving the BLE lifecycle outside of the VM motivated a number of changes to remove heap allocations in some APIs. It also motivated unifying connection initiation to the Adapter class rather than the Central and Peripheral classes which have been removed. Adapter now handles the GAP portion of BLE including advertising, which has moved but is largely unchanged, and scanning, which has been enhanced to return an iterator of filtered results. Once a connection is created (either by us (aka Central) or a remote device (aka Peripheral)) it is represented by a new Connection class. This class knows the current connection state and can discover and instantiate remote Services along with their Characteristics and Descriptors. Relates to #586
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Paul Sokolovsky
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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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#ifndef MICROPY_INCLUDED_PY_RINGBUF_H
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#define MICROPY_INCLUDED_PY_RINGBUF_H
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#include "py/gc.h"
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#include <stdint.h>
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typedef struct _ringbuf_t {
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uint8_t *buf;
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uint16_t size;
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uint16_t iget;
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uint16_t iput;
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} ringbuf_t;
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// Static initialization:
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// byte buf_array[N];
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// ringbuf_t buf = {buf_array, sizeof(buf_array)};
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// Dynamic initialization. This creates root pointer!
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#define ringbuf_alloc(r, sz, long_lived) \
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{ \
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(r)->buf = gc_alloc(sz, false, long_lived); \
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(r)->size = sz; \
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(r)->iget = (r)->iput = 0; \
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}
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static inline int ringbuf_get(ringbuf_t *r) {
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if (r->iget == r->iput) {
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return -1;
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}
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uint8_t v = r->buf[r->iget++];
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if (r->iget >= r->size) {
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r->iget = 0;
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}
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return v;
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}
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static inline int ringbuf_put(ringbuf_t *r, uint8_t v) {
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uint32_t iput_new = r->iput + 1;
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if (iput_new >= r->size) {
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iput_new = 0;
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}
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if (iput_new == r->iget) {
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return -1;
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}
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r->buf[r->iput] = v;
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r->iput = iput_new;
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return 0;
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}
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static inline uint16_t ringbuf_count(ringbuf_t *r)
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{
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volatile int count = r->iput - r->iget;
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if ( count < 0 ) {
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count += r->size;
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}
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return (uint16_t) count;
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}
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static inline void ringbuf_clear(ringbuf_t *r)
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{
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r->iput = r->iget = 0;
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}
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// will overwrite old data
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static inline void ringbuf_put_n(ringbuf_t* r, uint8_t* buf, uint8_t bufsize)
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{
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for(uint8_t i=0; i < bufsize; i++) {
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if ( ringbuf_put(r, buf[i]) < 0 ) {
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// if full overwrite old data
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(void) ringbuf_get(r);
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ringbuf_put(r, buf[i]);
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}
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}
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}
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static inline void ringbuf_get_n(ringbuf_t* r, uint8_t* buf, uint8_t bufsize)
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{
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for(uint8_t i=0; i < bufsize; i++) {
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buf[i] = ringbuf_get(r);
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}
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}
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#endif // MICROPY_INCLUDED_PY_RINGBUF_H
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