Drew Barbier / RFDuino

mbed library to connect to rfduino

Dependents:   RFDuino_example

RFDuino.cpp@5:cd05cc4dd824, 2014-01-08 (annotated)

Committer:
dbarbi1
Date:
Wed Jan 08 21:06:52 2014 +0000
Revision:
5:cd05cc4dd824
Parent:
4:7cbe6036c44e 
minor documentation update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dbarbi1 4:7cbe6036c44e 1 /* RFDuino Interface Library
dbarbi1 4:7cbe6036c44e 2 * Copyright (c) 2006-2013 Your Name Here
dbarbi1 4:7cbe6036c44e 3 *
dbarbi1 4:7cbe6036c44e 4 * Licensed under the Apache License, Version 2.0 (the "License");
dbarbi1 4:7cbe6036c44e 5 * you may not use this file except in compliance with the License.
dbarbi1 4:7cbe6036c44e 6 * You may obtain a copy of the License at
dbarbi1 4:7cbe6036c44e 7 *
dbarbi1 4:7cbe6036c44e 8 * http://www.apache.org/licenses/LICENSE-2.0
dbarbi1 4:7cbe6036c44e 9 *
dbarbi1 4:7cbe6036c44e 10 * Unless required by applicable law or agreed to in writing, software
dbarbi1 4:7cbe6036c44e 11 * distributed under the License is distributed on an "AS IS" BASIS,
dbarbi1 4:7cbe6036c44e 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dbarbi1 4:7cbe6036c44e 13 * See the License for the specific language governing permissions and
dbarbi1 4:7cbe6036c44e 14 * limitations under the License.
dbarbi1 2:effa15a46f51 15 */
dbarbi1 4:7cbe6036c44e 16
dbarbi1 4:7cbe6036c44e 17 #include "RFDuino.h"
dbarbi1 4:7cbe6036c44e 18
dbarbi1 0:af5f495861b2 19 //Commands
dbarbi1 4:7cbe6036c44e 20 int const HANDSHAKE = 0x11;
dbarbi1 4:7cbe6036c44e 21 int const CONNECTED = 0x22;
dbarbi1 4:7cbe6036c44e 22 int const TRANSMIT = 0x33;
dbarbi1 4:7cbe6036c44e 23 int const RECEIVE = 0x44;
dbarbi1 0:af5f495861b2 24
dbarbi1 4:7cbe6036c44e 25 RFDuino::RFDuino(PinName tx, PinName rx): rfd(tx,rx)
dbarbi1 4:7cbe6036c44e 26 {
dbarbi1 0:af5f495861b2 27 //init
dbarbi1 4:7cbe6036c44e 28 dataFlag=false;
dbarbi1 0:af5f495861b2 29 }
dbarbi1 0:af5f495861b2 30
dbarbi1 0:af5f495861b2 31
dbarbi1 0:af5f495861b2 32
dbarbi1 4:7cbe6036c44e 33 //rfduino seems to take a few seconds to be ready
dbarbi1 4:7cbe6036c44e 34 //for serial comm
dbarbi1 4:7cbe6036c44e 35 bool RFDuino::handshake(void)
dbarbi1 4:7cbe6036c44e 36 {
dbarbi1 0:af5f495861b2 37 unsigned char temp = 0;
dbarbi1 4:7cbe6036c44e 38 // make sure RX irq is detached
dbarbi1 4:7cbe6036c44e 39 rfd.attach(NULL);
dbarbi1 4:7cbe6036c44e 40 // send a handshake byte
dbarbi1 4:7cbe6036c44e 41 rfd.putc(HANDSHAKE);
dbarbi1 4:7cbe6036c44e 42 // give some time for data to be sent
dbarbi1 4:7cbe6036c44e 43 wait(0.1);
dbarbi1 0:af5f495861b2 44
dbarbi1 4:7cbe6036c44e 45 if(rfd.readable()) {
dbarbi1 4:7cbe6036c44e 46 temp = rfd.getc();
dbarbi1 4:7cbe6036c44e 47 //attach Serial isr
dbarbi1 4:7cbe6036c44e 48 rfd.attach(this, &RFDuino::receive_isr);
dbarbi1 0:af5f495861b2 49 }
dbarbi1 0:af5f495861b2 50
dbarbi1 4:7cbe6036c44e 51 return (temp) ? 1 : 0;
dbarbi1 0:af5f495861b2 52 }
dbarbi1 0:af5f495861b2 53
dbarbi1 4:7cbe6036c44e 54 bool RFDuino::readable(void) const
dbarbi1 4:7cbe6036c44e 55 {
dbarbi1 0:af5f495861b2 56 return dataFlag;
dbarbi1 0:af5f495861b2 57 }
dbarbi1 0:af5f495861b2 58
dbarbi1 4:7cbe6036c44e 59 bool RFDuino::isConnected(void)
dbarbi1 4:7cbe6036c44e 60 {
dbarbi1 4:7cbe6036c44e 61 unsigned char temp = 0;
dbarbi1 4:7cbe6036c44e 62 // make sure RX irq is detached
dbarbi1 4:7cbe6036c44e 63 rfd.attach(NULL);
dbarbi1 4:7cbe6036c44e 64 // send a byte and read the response
dbarbi1 0:af5f495861b2 65 rfd.putc(CONNECTED);
dbarbi1 0:af5f495861b2 66 temp = rfd.getc();
dbarbi1 4:7cbe6036c44e 67
dbarbi1 4:7cbe6036c44e 68 //attach Serial isr
dbarbi1 4:7cbe6036c44e 69 rfd.attach(this, &RFDuino::receive_isr);
dbarbi1 4:7cbe6036c44e 70
dbarbi1 4:7cbe6036c44e 71 return (temp) ? 1 : 0;
dbarbi1 4:7cbe6036c44e 72 }
dbarbi1 4:7cbe6036c44e 73
dbarbi1 4:7cbe6036c44e 74 bool RFDuino::transmit(const unsigned char *buff, const int len)
dbarbi1 4:7cbe6036c44e 75 {
dbarbi1 4:7cbe6036c44e 76 //needs to be less than 255 bytes
dbarbi1 4:7cbe6036c44e 77 if (len > buff_size) {
dbarbi1 4:7cbe6036c44e 78 return 0;
dbarbi1 4:7cbe6036c44e 79 }
dbarbi1 4:7cbe6036c44e 80
dbarbi1 4:7cbe6036c44e 81 // make sure RX irq is detached
dbarbi1 4:7cbe6036c44e 82 rfd.attach(NULL);
dbarbi1 4:7cbe6036c44e 83
dbarbi1 4:7cbe6036c44e 84 //send command
dbarbi1 4:7cbe6036c44e 85 rfd.putc(TRANSMIT);
dbarbi1 4:7cbe6036c44e 86 rfd.putc(static_cast<unsigned char>(len));
dbarbi1 4:7cbe6036c44e 87 for(int i=0; i<len; i++) {
dbarbi1 4:7cbe6036c44e 88 rfd.putc(buff[i]);
dbarbi1 4:7cbe6036c44e 89 }
dbarbi1 4:7cbe6036c44e 90
dbarbi1 4:7cbe6036c44e 91 //attach Serial isr
dbarbi1 4:7cbe6036c44e 92 rfd.attach(this, &RFDuino::receive_isr);
dbarbi1 4:7cbe6036c44e 93
dbarbi1 4:7cbe6036c44e 94 return 1;
dbarbi1 0:af5f495861b2 95 }
dbarbi1 0:af5f495861b2 96
dbarbi1 0:af5f495861b2 97
dbarbi1 4:7cbe6036c44e 98 int RFDuino::read(unsigned char* buff, const int size)
dbarbi1 4:7cbe6036c44e 99 {
dbarbi1 4:7cbe6036c44e 100 memcpy(buff, data.buff, size/*data.len*/);
dbarbi1 4:7cbe6036c44e 101 dataFlag = false;
dbarbi1 0:af5f495861b2 102
dbarbi1 0:af5f495861b2 103 return data.len;
dbarbi1 0:af5f495861b2 104 }
dbarbi1 0:af5f495861b2 105
dbarbi1 4:7cbe6036c44e 106 void RFDuino::receive_isr()
dbarbi1 4:7cbe6036c44e 107 {
dbarbi1 4:7cbe6036c44e 108 if(rfd.getc() == RECEIVE) {
dbarbi1 4:7cbe6036c44e 109 data.len = static_cast<int>(rfd.getc());
dbarbi1 4:7cbe6036c44e 110 if(data.len > buff_size) {
dbarbi1 4:7cbe6036c44e 111 // signal an error or reset??
dbarbi1 4:7cbe6036c44e 112 data.len = buff_size;
dbarbi1 4:7cbe6036c44e 113 }
dbarbi1 4:7cbe6036c44e 114
dbarbi1 4:7cbe6036c44e 115 for(int i=0; i<data.len; i++) {
dbarbi1 0:af5f495861b2 116 data.buff[i] = rfd.getc();
dbarbi1 0:af5f495861b2 117 }
dbarbi1 4:7cbe6036c44e 118 //handshake
dbarbi1 4:7cbe6036c44e 119 //rfd.putc(HANDSHAKE);
dbarbi1 4:7cbe6036c44e 120
dbarbi1 0:af5f495861b2 121 dataFlag=true;
dbarbi1 4:7cbe6036c44e 122 } else {
dbarbi1 4:7cbe6036c44e 123 //we dont know this command, read and disregard
dbarbi1 4:7cbe6036c44e 124 while(rfd.readable()) {
dbarbi1 4:7cbe6036c44e 125 char c = rfd.getc();
dbarbi1 4:7cbe6036c44e 126 c = c;
dbarbi1 0:af5f495861b2 127 }
dbarbi1 0:af5f495861b2 128 }
dbarbi1 0:af5f495861b2 129 }
dbarbi1 0:af5f495861b2 130
dbarbi1 0:af5f495861b2 131
dbarbi1 0:af5f495861b2 132
dbarbi1 0:af5f495861b2 133
dbarbi1 0:af5f495861b2 134