Katrijn Verhasselt / Mbed 2 deprecated MCP4725Translator

Gets messages form the pc and translates it to I2C and back.

Dependencies:   DevInterfaces I2Cinterfaces MCP4725 mbed

Reader.cpp@1:8ba039abd9b8, 2016-05-18 (annotated)

Committer:
katrijnverhasselt
Date:
Wed May 18 11:35:45 2016 +0000
Revision:
1:8ba039abd9b8
Parent:
0:b40341017545
Child:
2:2330ad8b1baa
Fixed it!

Who changed what in which revision?

UserRevisionLine numberNew contents of line
katrijnverhasselt 0:b40341017545 1 #include "Reader.h"
katrijnverhasselt 0:b40341017545 2
katrijnverhasselt 0:b40341017545 3 // Default constructor
katrijnverhasselt 0:b40341017545 4 Reader::Reader()
katrijnverhasselt 0:b40341017545 5 : pc(USBTX, USBRX),
katrijnverhasselt 0:b40341017545 6 _isNewMessageReceived(false),
katrijnverhasselt 0:b40341017545 7 _lastMessage(),
katrijnverhasselt 0:b40341017545 8 _lastMessageSize(0),
katrijnverhasselt 0:b40341017545 9 _buffer(),
katrijnverhasselt 0:b40341017545 10 _bufferSize(0),
katrijnverhasselt 0:b40341017545 11 _lastChar(0),
katrijnverhasselt 0:b40341017545 12 _isMessageStarted(false),
katrijnverhasselt 0:b40341017545 13 _charsToRead(-1),
katrijnverhasselt 0:b40341017545 14 _index(0)
katrijnverhasselt 0:b40341017545 15 {
katrijnverhasselt 0:b40341017545 16 // Attach read function to pc
katrijnverhasselt 0:b40341017545 17 pc.attach(this, &Reader::pcCallback);
katrijnverhasselt 0:b40341017545 18 }
katrijnverhasselt 0:b40341017545 19
katrijnverhasselt 0:b40341017545 20
katrijnverhasselt 0:b40341017545 21 bool Reader::IsNewMessageReceived() {
katrijnverhasselt 0:b40341017545 22 // If no message received, return false
katrijnverhasselt 0:b40341017545 23 if (!_isNewMessageReceived)
katrijnverhasselt 0:b40341017545 24 return false;
katrijnverhasselt 0:b40341017545 25
katrijnverhasselt 0:b40341017545 26 // If message received, set to false and return true
katrijnverhasselt 0:b40341017545 27 _isNewMessageReceived = false;
katrijnverhasselt 0:b40341017545 28 return true;
katrijnverhasselt 0:b40341017545 29 }
katrijnverhasselt 0:b40341017545 30
katrijnverhasselt 0:b40341017545 31 Translator::MessageInfo Reader::GetLastMessageInfo() const {
katrijnverhasselt 0:b40341017545 32 return _lastMessageInfo;
katrijnverhasselt 0:b40341017545 33 }
katrijnverhasselt 0:b40341017545 34
katrijnverhasselt 0:b40341017545 35 const int8_t* Reader::GetLastMessage() const {
katrijnverhasselt 0:b40341017545 36 return _lastMessage;
katrijnverhasselt 0:b40341017545 37 }
katrijnverhasselt 0:b40341017545 38
katrijnverhasselt 0:b40341017545 39 int Reader::GetLastMessageSize() const {
katrijnverhasselt 0:b40341017545 40 return _lastMessageSize;
katrijnverhasselt 0:b40341017545 41 }
katrijnverhasselt 0:b40341017545 42
katrijnverhasselt 0:b40341017545 43 void Reader::pcCallback() {
katrijnverhasselt 0:b40341017545 44 // Get the sent character
katrijnverhasselt 0:b40341017545 45 _lastChar = pc.getc();
katrijnverhasselt 0:b40341017545 46 if (_lastChar == Translator::Rules::StartChar) {
katrijnverhasselt 0:b40341017545 47 _index = 0;
katrijnverhasselt 0:b40341017545 48 }
katrijnverhasselt 0:b40341017545 49 // Add character to buffer
katrijnverhasselt 0:b40341017545 50 _buffer[_index] = _lastChar;
katrijnverhasselt 0:b40341017545 51 // Check if valid message by translating it
katrijnverhasselt 0:b40341017545 52 Translator::MessageInfo info;
katrijnverhasselt 0:b40341017545 53 if (!Translator::Translate(_buffer, _index + 1, &info)) {
katrijnverhasselt 0:b40341017545 54 _index++;
katrijnverhasselt 0:b40341017545 55 return;
katrijnverhasselt 0:b40341017545 56 }
katrijnverhasselt 0:b40341017545 57
katrijnverhasselt 0:b40341017545 58 // Translation succesful, copy to _info
katrijnverhasselt 0:b40341017545 59 _lastMessageInfo = info;
katrijnverhasselt 0:b40341017545 60 // Notify user of new message
katrijnverhasselt 0:b40341017545 61 _isNewMessageReceived = true;
katrijnverhasselt 0:b40341017545 62 // Reset counter
katrijnverhasselt 0:b40341017545 63 _index = 0;
katrijnverhasselt 0:b40341017545 64 return;
katrijnverhasselt 0:b40341017545 65
katrijnverhasselt 0:b40341017545 66
katrijnverhasselt 0:b40341017545 67
katrijnverhasselt 0:b40341017545 68
katrijnverhasselt 0:b40341017545 69 //printf("'%c' (%i) ; ", _lastChar, (int)_lastChar);
katrijnverhasselt 0:b40341017545 70 // If no ongoing message and starting character was received
katrijnverhasselt 0:b40341017545 71 if (_lastChar == Translator::Rules::StartChar) {
katrijnverhasselt 0:b40341017545 72 //printf("First char: %c", _lastChar);
katrijnverhasselt 0:b40341017545 73 // Get ready to receive the message
katrijnverhasselt 0:b40341017545 74 _isMessageStarted = true;
katrijnverhasselt 0:b40341017545 75 _index = 0;
katrijnverhasselt 0:b40341017545 76 _charsToRead = -1; // value < 0 indicates no length was read yet
katrijnverhasselt 0:b40341017545 77 } // If message was started but no length was read yet
katrijnverhasselt 0:b40341017545 78 else if (_charsToRead < 0) {
katrijnverhasselt 0:b40341017545 79 // Get ready to receive the command
katrijnverhasselt 0:b40341017545 80 _charsToRead = (int)_lastChar;
katrijnverhasselt 0:b40341017545 81 //printf("CharsToRead: %i", _charsToRead);
katrijnverhasselt 0:b40341017545 82 //_buffer = new int8_t[_charsToRead];
katrijnverhasselt 0:b40341017545 83 _index = 0;
katrijnverhasselt 0:b40341017545 84 } // If message was started and size is known
katrijnverhasselt 0:b40341017545 85 else if (_charsToRead > 0) {
katrijnverhasselt 0:b40341017545 86 //printf("Storing '%c' (%i)", _lastChar, (int)_lastChar);
katrijnverhasselt 0:b40341017545 87 // Read _charsToRead characters and store in _buffer
katrijnverhasselt 0:b40341017545 88 if (_index < _charsToRead) {
katrijnverhasselt 0:b40341017545 89 _buffer[_index] = _lastChar;
katrijnverhasselt 0:b40341017545 90 _index++;
katrijnverhasselt 0:b40341017545 91
katrijnverhasselt 0:b40341017545 92 // If message was fully received
katrijnverhasselt 0:b40341017545 93 if (_index == _charsToRead) {
katrijnverhasselt 0:b40341017545 94 // Copy _buffer to _lastMessage (see Utility.h)
katrijnverhasselt 0:b40341017545 95 DeepCopy(_buffer, _charsToRead, _lastMessage);
katrijnverhasselt 0:b40341017545 96 _lastMessageSize = _charsToRead;
katrijnverhasselt 0:b40341017545 97 // Reset values
katrijnverhasselt 0:b40341017545 98 _isMessageStarted = false;
katrijnverhasselt 0:b40341017545 99 _charsToRead = -1;
katrijnverhasselt 0:b40341017545 100 _index = 0;
katrijnverhasselt 0:b40341017545 101 // Let user know that a new message was received
katrijnverhasselt 0:b40341017545 102 _isNewMessageReceived = true;
katrijnverhasselt 0:b40341017545 103 }
katrijnverhasselt 0:b40341017545 104 }
katrijnverhasselt 0:b40341017545 105 }
katrijnverhasselt 0:b40341017545 106 //printf(" / ");
katrijnverhasselt 0:b40341017545 107 }