Amanda Travieso / MODSERIAL

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Fork of MODSERIAL by Andy K

example3a.cpp@26:b59e9b91374d, 2015-10-22 (annotated)

Committer:
atravieso
Date:
Thu Oct 22 23:07:30 2015 +0000
Revision:
26:b59e9b91374d
Parent:
18:21ef26402365 
This will turn on and off LEDs when command entered on the terminal.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AjK 18:21ef26402365 1 /*
AjK 18:21ef26402365 2 Copyright (c) 2011 Andy Kirkham
AjK 18:21ef26402365 3
AjK 18:21ef26402365 4 Permission is hereby granted, free of charge, to any person obtaining a copy
AjK 18:21ef26402365 5 of this software and associated documentation files (the "Software"), to deal
AjK 18:21ef26402365 6 in the Software without restriction, including without limitation the rights
AjK 18:21ef26402365 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
AjK 18:21ef26402365 8 copies of the Software, and to permit persons to whom the Software is
AjK 18:21ef26402365 9 furnished to do so, subject to the following conditions:
AjK 18:21ef26402365 10
AjK 18:21ef26402365 11 The above copyright notice and this permission notice shall be included in
AjK 18:21ef26402365 12 all copies or substantial portions of the Software.
AjK 18:21ef26402365 13
AjK 18:21ef26402365 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
AjK 18:21ef26402365 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
AjK 18:21ef26402365 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AjK 18:21ef26402365 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
AjK 18:21ef26402365 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
AjK 18:21ef26402365 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
AjK 18:21ef26402365 20 THE SOFTWARE.
AjK 18:21ef26402365 21
AjK 18:21ef26402365 22 @file example3.cpp
AjK 18:21ef26402365 23 @purpose Demos a simple filter.
AjK 18:21ef26402365 24 @version see ChangeLog.c
AjK 18:21ef26402365 25 @author Andy Kirkham
AjK 18:21ef26402365 26 */
AjK 18:21ef26402365 27
AjK 18:21ef26402365 28 /*
AjK 18:21ef26402365 29 This example shows how to use the new callback system. In the old system
AjK 18:21ef26402365 30 Mbed's FunctionPointer[1] type was used to store abd make calls to callbacks.
AjK 18:21ef26402365 31 However, that limits the callback function prototype to void func(void);
AjK 18:21ef26402365 32 which means we cannot pass parameters.
AjK 18:21ef26402365 33
AjK 18:21ef26402365 34 This latest version of MODSERIAL now uses its own callback object. This allows
AjK 18:21ef26402365 35 the passing of a pointer to a class that holds information about the MODSERIAL
AjK 18:21ef26402365 36 object making the callback. As of version 1.18 one critcal piece of information
AjK 18:21ef26402365 37 is passed, a pointer to the MODSERIAL object. This allows callbacks to use the
AjK 18:21ef26402365 38 MODSERIAL functions and data.
AjK 18:21ef26402365 39
AjK 18:21ef26402365 40 Additionally, since MODSERIAL and the callback parameter class MODSERIAL_IRQ_INFO
AjK 18:21ef26402365 41 are friends, MODSERIAL_IRQ_INFO can access the protected functions of MODSERIAL.
AjK 18:21ef26402365 42 This is used to ensure functions that can only be called during a callback
AjK 18:21ef26402365 43 can be invoked from a callback.
AjK 18:21ef26402365 44
AjK 18:21ef26402365 45 [1] http://mbed.org/projects/libraries/svn/mbed/trunk/FunctionPointer.h
AjK 18:21ef26402365 46 */
AjK 18:21ef26402365 47
AjK 18:21ef26402365 48 #ifdef COMPILE_EXAMPLE3_CODE_MODSERIAL
AjK 18:21ef26402365 49
AjK 18:21ef26402365 50 #include "mbed.h"
AjK 18:21ef26402365 51 #include "MODSERIAL.h"
AjK 18:21ef26402365 52
AjK 18:21ef26402365 53 DigitalOut led1(LED1);
AjK 18:21ef26402365 54
AjK 18:21ef26402365 55 MODSERIAL pc(USBTX, USBRX);
AjK 18:21ef26402365 56
AjK 18:21ef26402365 57 // The following callback is defined in example3b.cpp
AjK 18:21ef26402365 58 //! @see example3b.cpp
AjK 18:21ef26402365 59 void rxCallback(MODSERIAL_IRQ_INFO *info);
AjK 18:21ef26402365 60
AjK 18:21ef26402365 61 int main() {
AjK 18:21ef26402365 62
AjK 18:21ef26402365 63 int life_counter = 0;
AjK 18:21ef26402365 64
AjK 18:21ef26402365 65 pc.baud(115200);
atravieso 26:b59e9b91374d 66 MODSERIAL::RxIrq = 0;
AjK 18:21ef26402365 67 pc.attach(&rxCallback, MODSERIAL::RxIrq);
AjK 18:21ef26402365 68
AjK 18:21ef26402365 69 while(1) {
AjK 18:21ef26402365 70 // Echo back any chars we get except 'A' which is filtered by the rxCallback.
AjK 18:21ef26402365 71 if (pc.readable()) {
AjK 18:21ef26402365 72 pc.putc(pc.getc());
AjK 18:21ef26402365 73 }
AjK 18:21ef26402365 74
AjK 18:21ef26402365 75 // Toggle LED1 every so often to show we are alive.
AjK 18:21ef26402365 76 if (life_counter++ == 1000000) {
AjK 18:21ef26402365 77 life_counter = 0;
AjK 18:21ef26402365 78 led1 = !led1;
AjK 18:21ef26402365 79 }
AjK 18:21ef26402365 80 }
AjK 18:21ef26402365 81 }
AjK 18:21ef26402365 82
AjK 18:21ef26402365 83 #endif