Rick McConney / Mbed 2 deprecated AvnetATT_shape_hackathon

This program simply connects to a HTS221 I2C device to proximity sensor

Dependencies:   FXOS8700CQ mbed

SerialBuffered/SerialBuffered.cpp@43:3979ea0a2df3, 2016-10-10 (annotated)

Committer:
elmkom
Date:
Mon Oct 10 16:29:34 2016 +0000
Revision:
43:3979ea0a2df3
Parent:
0:9d5134074d84 
Flush modem buffer before send

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 0:9d5134074d84 1
JMF 0:9d5134074d84 2 #include "mbed.h"
JMF 0:9d5134074d84 3 #include "SerialBuffered.h"
JMF 0:9d5134074d84 4
JMF 0:9d5134074d84 5 SerialBuffered::SerialBuffered( PinName tx, PinName rx, size_t bufferSize ) : Serial( tx, rx )
JMF 0:9d5134074d84 6 {
JMF 0:9d5134074d84 7 m_buffSize = 0;
JMF 0:9d5134074d84 8 m_contentStart = 0;
JMF 0:9d5134074d84 9 m_contentEnd = 0;
JMF 0:9d5134074d84 10 m_timeout = -1.0;
JMF 0:9d5134074d84 11 _txpin = tx;
JMF 0:9d5134074d84 12 _rxpin = rx;
JMF 0:9d5134074d84 13
JMF 0:9d5134074d84 14 attach( this, &SerialBuffered::handleInterrupt );
JMF 0:9d5134074d84 15
JMF 0:9d5134074d84 16 m_buff = (uint8_t *) malloc( bufferSize );
JMF 0:9d5134074d84 17 if( m_buff )
JMF 0:9d5134074d84 18 m_buffSize = bufferSize;
JMF 0:9d5134074d84 19 }
JMF 0:9d5134074d84 20
JMF 0:9d5134074d84 21
JMF 0:9d5134074d84 22 SerialBuffered::~SerialBuffered()
JMF 0:9d5134074d84 23 {
JMF 0:9d5134074d84 24 if( m_buff )
JMF 0:9d5134074d84 25 free( m_buff );
JMF 0:9d5134074d84 26 }
JMF 0:9d5134074d84 27
JMF 0:9d5134074d84 28 void SerialBuffered::setTimeout( float seconds )
JMF 0:9d5134074d84 29 {
JMF 0:9d5134074d84 30 m_timeout = seconds;
JMF 0:9d5134074d84 31 }
JMF 0:9d5134074d84 32
JMF 0:9d5134074d84 33 size_t SerialBuffered::readBytes( uint8_t *bytes, size_t requested )
JMF 0:9d5134074d84 34 {
JMF 0:9d5134074d84 35 int i = 0;
JMF 0:9d5134074d84 36
JMF 0:9d5134074d84 37 for( ; i < requested; )
JMF 0:9d5134074d84 38 {
JMF 0:9d5134074d84 39 int c = getc();
JMF 0:9d5134074d84 40 if( c < 0 )
JMF 0:9d5134074d84 41 break;
JMF 0:9d5134074d84 42 bytes[i] = c;
JMF 0:9d5134074d84 43 i++;
JMF 0:9d5134074d84 44 }
JMF 0:9d5134074d84 45
JMF 0:9d5134074d84 46 return i;
JMF 0:9d5134074d84 47
JMF 0:9d5134074d84 48 }
JMF 0:9d5134074d84 49
JMF 0:9d5134074d84 50
JMF 0:9d5134074d84 51 int SerialBuffered::_getc()
JMF 0:9d5134074d84 52 {
JMF 0:9d5134074d84 53 m_timer.reset();
JMF 0:9d5134074d84 54 m_timer.start();
JMF 0:9d5134074d84 55 while (m_contentStart == m_contentEnd) {
JMF 0:9d5134074d84 56 if (m_timeout >= 0 && m_timer.read() >= m_timeout )
JMF 0:9d5134074d84 57 return EOF;
JMF 0:9d5134074d84 58 wait_ms( 1 );
JMF 0:9d5134074d84 59 }
JMF 0:9d5134074d84 60
JMF 0:9d5134074d84 61 m_timer.stop();
JMF 0:9d5134074d84 62
JMF 0:9d5134074d84 63 int nbp = (m_contentStart + 1) % m_buffSize;
JMF 0:9d5134074d84 64 uint8_t result = m_buff[m_contentStart];
JMF 0:9d5134074d84 65 m_contentStart = nbp;
JMF 0:9d5134074d84 66 return result;
JMF 0:9d5134074d84 67 }
JMF 0:9d5134074d84 68
JMF 0:9d5134074d84 69 //int Serial::_getc() {
JMF 0:9d5134074d84 70 // return _base_getc();
JMF 0:9d5134074d84 71 //}
JMF 0:9d5134074d84 72
JMF 0:9d5134074d84 73 int SerialBuffered::_putc(int c) {
JMF 0:9d5134074d84 74 return _base_putc(c);
JMF 0:9d5134074d84 75 }
JMF 0:9d5134074d84 76
JMF 0:9d5134074d84 77 int SerialBuffered::readable()
JMF 0:9d5134074d84 78 {
JMF 0:9d5134074d84 79 return m_contentStart != m_contentEnd ;
JMF 0:9d5134074d84 80 }
JMF 0:9d5134074d84 81
JMF 0:9d5134074d84 82 void SerialBuffered::handleInterrupt()
JMF 0:9d5134074d84 83 {
JMF 0:9d5134074d84 84 while (serial_readable(&_serial)) {
JMF 0:9d5134074d84 85 char c_in = _base_getc();
JMF 0:9d5134074d84 86 int nbp = (m_contentEnd + 1) % m_buffSize;
JMF 0:9d5134074d84 87
JMF 0:9d5134074d84 88 if (nbp != m_contentStart) {
JMF 0:9d5134074d84 89 m_buff[m_contentEnd] = c_in;
JMF 0:9d5134074d84 90 m_contentEnd = nbp;
JMF 0:9d5134074d84 91 }
JMF 0:9d5134074d84 92 }
JMF 0:9d5134074d84 93 }