FPointer - A callback system that allows for 32bit unsigned ints to be passed to and from the callback.
Dependents: FYPFinalProgram FYPFinalizeProgram KEYS SaveKeypad ... more
example1.h@2:56e309e76c19, 2011-01-18 (annotated)
- Committer:
- AjK
- Date:
- Tue Jan 18 23:09:32 2011 +0000
- Revision:
- 2:56e309e76c19
- Parent:
- 1:d7803001a259
1.2 See ChangeLog.h
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
AjK | 0:fcfb13f40846 | 1 | /* |
AjK | 1:d7803001a259 | 2 | Copyright (c) 2011 Andy Kirkham |
AjK | 0:fcfb13f40846 | 3 | |
AjK | 0:fcfb13f40846 | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
AjK | 0:fcfb13f40846 | 5 | of this software and associated documentation files (the "Software"), to deal |
AjK | 0:fcfb13f40846 | 6 | in the Software without restriction, including without limitation the rights |
AjK | 0:fcfb13f40846 | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
AjK | 0:fcfb13f40846 | 8 | copies of the Software, and to permit persons to whom the Software is |
AjK | 0:fcfb13f40846 | 9 | furnished to do so, subject to the following conditions: |
AjK | 0:fcfb13f40846 | 10 | |
AjK | 0:fcfb13f40846 | 11 | The above copyright notice and this permission notice shall be included in |
AjK | 0:fcfb13f40846 | 12 | all copies or substantial portions of the Software. |
AjK | 0:fcfb13f40846 | 13 | |
AjK | 0:fcfb13f40846 | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
AjK | 0:fcfb13f40846 | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
AjK | 0:fcfb13f40846 | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
AjK | 0:fcfb13f40846 | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
AjK | 0:fcfb13f40846 | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
AjK | 0:fcfb13f40846 | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
AjK | 0:fcfb13f40846 | 20 | THE SOFTWARE. |
AjK | 0:fcfb13f40846 | 21 | */ |
AjK | 0:fcfb13f40846 | 22 | |
AjK | 0:fcfb13f40846 | 23 | #ifdef AJK_COMPILE_EXAMPLE1 |
AjK | 0:fcfb13f40846 | 24 | |
AjK | 0:fcfb13f40846 | 25 | #include "mbed.h" |
AjK | 0:fcfb13f40846 | 26 | #include "FPointer.h" |
AjK | 0:fcfb13f40846 | 27 | |
AjK | 0:fcfb13f40846 | 28 | DigitalOut led1(LED1); |
AjK | 0:fcfb13f40846 | 29 | DigitalOut led2(LED2); |
AjK | 0:fcfb13f40846 | 30 | DigitalOut led3(LED3); |
AjK | 0:fcfb13f40846 | 31 | DigitalOut led4(LED4); |
AjK | 0:fcfb13f40846 | 32 | |
AjK | 0:fcfb13f40846 | 33 | uint32_t myCallback(uint32_t value) { |
AjK | 0:fcfb13f40846 | 34 | // Get the value of the count in main |
AjK | 1:d7803001a259 | 35 | // (de-reference it) so we know what it is. |
AjK | 0:fcfb13f40846 | 36 | int i = *((int *)value); |
AjK | 0:fcfb13f40846 | 37 | |
AjK | 0:fcfb13f40846 | 38 | // Then display the bottom four bits of |
AjK | 0:fcfb13f40846 | 39 | // the count value on the LEDs. |
AjK | 0:fcfb13f40846 | 40 | led4 = (i & 1) ? 1 : 0; |
AjK | 0:fcfb13f40846 | 41 | led3 = (i & 2) ? 1 : 0; |
AjK | 0:fcfb13f40846 | 42 | led2 = (i & 4) ? 1 : 0; |
AjK | 0:fcfb13f40846 | 43 | led1 = (i & 8) ? 1 : 0; |
AjK | 0:fcfb13f40846 | 44 | |
AjK | 0:fcfb13f40846 | 45 | // What we return doesn't matter as it's |
AjK | 0:fcfb13f40846 | 46 | // not used in this example but we return |
AjK | 0:fcfb13f40846 | 47 | // "something" (zero in this case) to keep |
AjK | 1:d7803001a259 | 48 | // the compiler happy as it expects us to |
AjK | 0:fcfb13f40846 | 49 | // return something. |
AjK | 0:fcfb13f40846 | 50 | return 0; |
AjK | 0:fcfb13f40846 | 51 | } |
AjK | 0:fcfb13f40846 | 52 | |
AjK | 0:fcfb13f40846 | 53 | int main() { |
AjK | 0:fcfb13f40846 | 54 | FPointer myPointer; |
AjK | 0:fcfb13f40846 | 55 | int count = 0; |
AjK | 0:fcfb13f40846 | 56 | |
AjK | 0:fcfb13f40846 | 57 | // Attach a C function pointer as the callback. |
AjK | 0:fcfb13f40846 | 58 | myPointer.attach(&myCallback); |
AjK | 0:fcfb13f40846 | 59 | |
AjK | 0:fcfb13f40846 | 60 | while(1) { |
AjK | 0:fcfb13f40846 | 61 | wait(0.5); |
AjK | 0:fcfb13f40846 | 62 | |
AjK | 0:fcfb13f40846 | 63 | // Make the callback passing a pointer |
AjK | 0:fcfb13f40846 | 64 | // to the int count variable. |
AjK | 0:fcfb13f40846 | 65 | myPointer.call((uint32_t)&count); |
AjK | 0:fcfb13f40846 | 66 | |
AjK | 0:fcfb13f40846 | 67 | count++; |
AjK | 0:fcfb13f40846 | 68 | } |
AjK | 0:fcfb13f40846 | 69 | } |
AjK | 0:fcfb13f40846 | 70 | |
AjK | 0:fcfb13f40846 | 71 | #endif |