Tami Farber / microbit-dal

Revised to disable BLE for radio communication as needed.

Dependencies:   BLE_API nRF51822 mbed-dev-bin

Dependents:   microbit

source/types/RefCounted.cpp@74:26717338739d, 2019-11-26 (annotated)

Committer:
tsfarber
Date:
Tue Nov 26 04:12:46 2019 +0000
Revision:
74:26717338739d
Parent:
1:8aa5cdb4ab67 
This program combines samples programs radio TX and radio RX so that both units can send or receive depending on which unit's buttons are pressed. Tested successfully. MicroBitConfig.h has been edited to disable BLE.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Jonathan Austin 1:8aa5cdb4ab67 1 /*
Jonathan Austin 1:8aa5cdb4ab67 2 The MIT License (MIT)
Jonathan Austin 1:8aa5cdb4ab67 3
Jonathan Austin 1:8aa5cdb4ab67 4 Copyright (c) 2016 British Broadcasting Corporation.
Jonathan Austin 1:8aa5cdb4ab67 5 This software is provided by Lancaster University by arrangement with the BBC.
Jonathan Austin 1:8aa5cdb4ab67 6
Jonathan Austin 1:8aa5cdb4ab67 7 Permission is hereby granted, free of charge, to any person obtaining a
Jonathan Austin 1:8aa5cdb4ab67 8 copy of this software and associated documentation files (the "Software"),
Jonathan Austin 1:8aa5cdb4ab67 9 to deal in the Software without restriction, including without limitation
Jonathan Austin 1:8aa5cdb4ab67 10 the rights to use, copy, modify, merge, publish, distribute, sublicense,
Jonathan Austin 1:8aa5cdb4ab67 11 and/or sell copies of the Software, and to permit persons to whom the
Jonathan Austin 1:8aa5cdb4ab67 12 Software is furnished to do so, subject to the following conditions:
Jonathan Austin 1:8aa5cdb4ab67 13
Jonathan Austin 1:8aa5cdb4ab67 14 The above copyright notice and this permission notice shall be included in
Jonathan Austin 1:8aa5cdb4ab67 15 all copies or substantial portions of the Software.
Jonathan Austin 1:8aa5cdb4ab67 16
Jonathan Austin 1:8aa5cdb4ab67 17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Jonathan Austin 1:8aa5cdb4ab67 18 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Jonathan Austin 1:8aa5cdb4ab67 19 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
Jonathan Austin 1:8aa5cdb4ab67 20 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Jonathan Austin 1:8aa5cdb4ab67 21 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
Jonathan Austin 1:8aa5cdb4ab67 22 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
Jonathan Austin 1:8aa5cdb4ab67 23 DEALINGS IN THE SOFTWARE.
Jonathan Austin 1:8aa5cdb4ab67 24 */
Jonathan Austin 1:8aa5cdb4ab67 25
Jonathan Austin 1:8aa5cdb4ab67 26 /**
Jonathan Austin 1:8aa5cdb4ab67 27 * Base class for payload for ref-counted objects. Used by ManagedString and MicroBitImage.
Jonathan Austin 1:8aa5cdb4ab67 28 * There is no constructor, as this struct is typically malloc()ed.
Jonathan Austin 1:8aa5cdb4ab67 29 */
Jonathan Austin 1:8aa5cdb4ab67 30 #include "mbed.h"
Jonathan Austin 1:8aa5cdb4ab67 31 #include "MicroBitConfig.h"
Jonathan Austin 1:8aa5cdb4ab67 32 #include "RefCounted.h"
Jonathan Austin 1:8aa5cdb4ab67 33 #include "MicroBitDisplay.h"
Jonathan Austin 1:8aa5cdb4ab67 34
Jonathan Austin 1:8aa5cdb4ab67 35 /**
Jonathan Austin 1:8aa5cdb4ab67 36 * Initializes for one outstanding reference.
Jonathan Austin 1:8aa5cdb4ab67 37 */
Jonathan Austin 1:8aa5cdb4ab67 38 void RefCounted::init()
Jonathan Austin 1:8aa5cdb4ab67 39 {
Jonathan Austin 1:8aa5cdb4ab67 40 // Initialize to one reference (lowest bit set to 1)
Jonathan Austin 1:8aa5cdb4ab67 41 refCount = 3;
Jonathan Austin 1:8aa5cdb4ab67 42 }
Jonathan Austin 1:8aa5cdb4ab67 43
Jonathan Austin 1:8aa5cdb4ab67 44 /**
Jonathan Austin 1:8aa5cdb4ab67 45 * Checks if the object resides in flash memory.
Jonathan Austin 1:8aa5cdb4ab67 46 *
Jonathan Austin 1:8aa5cdb4ab67 47 * @param t the object to check.
Jonathan Austin 1:8aa5cdb4ab67 48 *
Jonathan Austin 1:8aa5cdb4ab67 49 * @return true if the object resides in flash memory, false otherwise.
Jonathan Austin 1:8aa5cdb4ab67 50 */
Jonathan Austin 1:8aa5cdb4ab67 51 static inline bool isReadOnlyInline(RefCounted *t)
Jonathan Austin 1:8aa5cdb4ab67 52 {
Jonathan Austin 1:8aa5cdb4ab67 53 uint32_t refCount = t->refCount;
Jonathan Austin 1:8aa5cdb4ab67 54
Jonathan Austin 1:8aa5cdb4ab67 55 if (refCount == 0xffff)
Jonathan Austin 1:8aa5cdb4ab67 56 return true; // object in flash
Jonathan Austin 1:8aa5cdb4ab67 57
Jonathan Austin 1:8aa5cdb4ab67 58 // Do some sanity checking while we're here
Jonathan Austin 1:8aa5cdb4ab67 59 if (refCount == 1 || // object should have been deleted
Jonathan Austin 1:8aa5cdb4ab67 60 (refCount & 1) == 0) // refCount doesn't look right
Jonathan Austin 1:8aa5cdb4ab67 61 microbit_panic(MICROBIT_HEAP_ERROR);
Jonathan Austin 1:8aa5cdb4ab67 62
Jonathan Austin 1:8aa5cdb4ab67 63 // Not read only
Jonathan Austin 1:8aa5cdb4ab67 64 return false;
Jonathan Austin 1:8aa5cdb4ab67 65 }
Jonathan Austin 1:8aa5cdb4ab67 66
Jonathan Austin 1:8aa5cdb4ab67 67 /**
Jonathan Austin 1:8aa5cdb4ab67 68 * Checks if the object resides in flash memory.
Jonathan Austin 1:8aa5cdb4ab67 69 *
Jonathan Austin 1:8aa5cdb4ab67 70 * @return true if the object resides in flash memory, false otherwise.
Jonathan Austin 1:8aa5cdb4ab67 71 */
Jonathan Austin 1:8aa5cdb4ab67 72 bool RefCounted::isReadOnly()
Jonathan Austin 1:8aa5cdb4ab67 73 {
Jonathan Austin 1:8aa5cdb4ab67 74 return isReadOnlyInline(this);
Jonathan Austin 1:8aa5cdb4ab67 75 }
Jonathan Austin 1:8aa5cdb4ab67 76
Jonathan Austin 1:8aa5cdb4ab67 77 /**
Jonathan Austin 1:8aa5cdb4ab67 78 * Increment reference count.
Jonathan Austin 1:8aa5cdb4ab67 79 */
Jonathan Austin 1:8aa5cdb4ab67 80 void RefCounted::incr()
Jonathan Austin 1:8aa5cdb4ab67 81 {
Jonathan Austin 1:8aa5cdb4ab67 82 if (!isReadOnlyInline(this))
Jonathan Austin 1:8aa5cdb4ab67 83 refCount += 2;
Jonathan Austin 1:8aa5cdb4ab67 84 }
Jonathan Austin 1:8aa5cdb4ab67 85
Jonathan Austin 1:8aa5cdb4ab67 86 /**
Jonathan Austin 1:8aa5cdb4ab67 87 * Decrement reference count.
Jonathan Austin 1:8aa5cdb4ab67 88 */
Jonathan Austin 1:8aa5cdb4ab67 89 void RefCounted::decr()
Jonathan Austin 1:8aa5cdb4ab67 90 {
Jonathan Austin 1:8aa5cdb4ab67 91 if (isReadOnlyInline(this))
Jonathan Austin 1:8aa5cdb4ab67 92 return;
Jonathan Austin 1:8aa5cdb4ab67 93
Jonathan Austin 1:8aa5cdb4ab67 94 refCount -= 2;
Jonathan Austin 1:8aa5cdb4ab67 95 if (refCount == 1) {
Jonathan Austin 1:8aa5cdb4ab67 96 free(this);
Jonathan Austin 1:8aa5cdb4ab67 97 }
Jonathan Austin 1:8aa5cdb4ab67 98 }