MicroLabo / Mbed OS mbed-Dot-AT-Firmware

mDot AT-Firmware for testing

Dependencies:   MTS-Serial libmDot-mbed5

Fork of Dot-AT-Firmware by MultiTech

ATSerial.cpp@9:ff62b20f7000, 2016-04-04 (annotated)

Committer:
Mike Fiore
Date:
Mon Apr 04 09:00:31 2016 -0500
Revision:
9:ff62b20f7000
update to version 1.0.8 of AT firmware

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Mike Fiore 9:ff62b20f7000 1 #include "mbed.h"
Mike Fiore 9:ff62b20f7000 2 #include "ATSerial.h"
Mike Fiore 9:ff62b20f7000 3 #include "MTSLog.h"
Mike Fiore 9:ff62b20f7000 4
Mike Fiore 9:ff62b20f7000 5 using namespace mts;
Mike Fiore 9:ff62b20f7000 6
Mike Fiore 9:ff62b20f7000 7 ATSerial::ATSerial(PinName TXD, PinName RXD, int txBufferSize, int rxBufferSize)
Mike Fiore 9:ff62b20f7000 8 : MTSSerial(TXD, RXD, txBufferSize, rxBufferSize)
Mike Fiore 9:ff62b20f7000 9 , _serial(new RawSerial(TXD,RXD)),
Mike Fiore 9:ff62b20f7000 10 _baudrate(9600),
Mike Fiore 9:ff62b20f7000 11 _bits(8),
Mike Fiore 9:ff62b20f7000 12 _parity(mbed::SerialBase::None),
Mike Fiore 9:ff62b20f7000 13 _stop_bits(1),
Mike Fiore 9:ff62b20f7000 14 _last_time(0),
Mike Fiore 9:ff62b20f7000 15 _esc_cnt(0),
Mike Fiore 9:ff62b20f7000 16 _esc_ch('+'),
Mike Fiore 9:ff62b20f7000 17 _escaped(false)
Mike Fiore 9:ff62b20f7000 18 {
Mike Fiore 9:ff62b20f7000 19 timer.start();
Mike Fiore 9:ff62b20f7000 20 _serial->attach(this, &ATSerial::handleRead, Serial::RxIrq);
Mike Fiore 9:ff62b20f7000 21 }
Mike Fiore 9:ff62b20f7000 22
Mike Fiore 9:ff62b20f7000 23 ATSerial::~ATSerial()
Mike Fiore 9:ff62b20f7000 24 {
Mike Fiore 9:ff62b20f7000 25 delete _serial;
Mike Fiore 9:ff62b20f7000 26 }
Mike Fiore 9:ff62b20f7000 27
Mike Fiore 9:ff62b20f7000 28
Mike Fiore 9:ff62b20f7000 29
Mike Fiore 9:ff62b20f7000 30 void ATSerial::baud(int baudrate)
Mike Fiore 9:ff62b20f7000 31 {
Mike Fiore 9:ff62b20f7000 32 _baudrate = baudrate;
Mike Fiore 9:ff62b20f7000 33 _serial->baud(_baudrate);
Mike Fiore 9:ff62b20f7000 34 }
Mike Fiore 9:ff62b20f7000 35
Mike Fiore 9:ff62b20f7000 36 void ATSerial::format(int bits, SerialBase::Parity parity, int stop_bits)
Mike Fiore 9:ff62b20f7000 37 {
Mike Fiore 9:ff62b20f7000 38 _bits = bits;
Mike Fiore 9:ff62b20f7000 39 _parity = parity;
Mike Fiore 9:ff62b20f7000 40 _stop_bits = stop_bits;
Mike Fiore 9:ff62b20f7000 41 _serial->format(_bits, _parity, _stop_bits);
Mike Fiore 9:ff62b20f7000 42 }
Mike Fiore 9:ff62b20f7000 43
Mike Fiore 9:ff62b20f7000 44 void ATSerial::handleWrite()
Mike Fiore 9:ff62b20f7000 45 {
Mike Fiore 9:ff62b20f7000 46 while(txBuffer.size() != 0) {
Mike Fiore 9:ff62b20f7000 47 if (_serial->writeable()) {
Mike Fiore 9:ff62b20f7000 48 char byte;
Mike Fiore 9:ff62b20f7000 49 if(txBuffer.read(byte) == 1) {
Mike Fiore 9:ff62b20f7000 50 _serial->attach(NULL, Serial::RxIrq);
Mike Fiore 9:ff62b20f7000 51 _serial->putc(byte);
Mike Fiore 9:ff62b20f7000 52 _serial->attach(this, &ATSerial::handleRead, Serial::RxIrq);
Mike Fiore 9:ff62b20f7000 53 }
Mike Fiore 9:ff62b20f7000 54 } else {
Mike Fiore 9:ff62b20f7000 55 return;
Mike Fiore 9:ff62b20f7000 56 }
Mike Fiore 9:ff62b20f7000 57 }
Mike Fiore 9:ff62b20f7000 58 }
Mike Fiore 9:ff62b20f7000 59
Mike Fiore 9:ff62b20f7000 60 void mts::ATSerial::reattach(PinName TXD, PinName RXD) {
Mike Fiore 9:ff62b20f7000 61 delete _serial;
Mike Fiore 9:ff62b20f7000 62 _serial = new RawSerial(TXD, RXD);
Mike Fiore 9:ff62b20f7000 63 _serial->attach(this, &ATSerial::handleRead, Serial::RxIrq);
Mike Fiore 9:ff62b20f7000 64 _serial->baud(_baudrate);
Mike Fiore 9:ff62b20f7000 65 _serial->format(_bits, _parity, _stop_bits);
Mike Fiore 9:ff62b20f7000 66 rxBuffer.clear();
Mike Fiore 9:ff62b20f7000 67 txBuffer.clear();
Mike Fiore 9:ff62b20f7000 68 }
Mike Fiore 9:ff62b20f7000 69
Mike Fiore 9:ff62b20f7000 70 void mts::ATSerial::sendBreak() {
Mike Fiore 9:ff62b20f7000 71 _serial->send_break();
Mike Fiore 9:ff62b20f7000 72 }
Mike Fiore 9:ff62b20f7000 73
Mike Fiore 9:ff62b20f7000 74 bool ATSerial::escaped() {
Mike Fiore 9:ff62b20f7000 75
Mike Fiore 9:ff62b20f7000 76 int now = timer.read_ms();
Mike Fiore 9:ff62b20f7000 77
Mike Fiore 9:ff62b20f7000 78 // Have we seen three esc chars and 1 sec end guard has passed
Mike Fiore 9:ff62b20f7000 79 if (_escaped || (_esc_cnt == 3 && (now - _last_time > 1000))) {
Mike Fiore 9:ff62b20f7000 80 _escaped = true;
Mike Fiore 9:ff62b20f7000 81 return true;
Mike Fiore 9:ff62b20f7000 82
Mike Fiore 9:ff62b20f7000 83 // Have we seen a couple esc chars but nothing in 500 ms
Mike Fiore 9:ff62b20f7000 84 } else if (_esc_cnt > 0 && _esc_cnt != 3 && now - _last_time > 500) {
Mike Fiore 9:ff62b20f7000 85 // Write seen esc chars
Mike Fiore 9:ff62b20f7000 86 while (_esc_cnt) {
Mike Fiore 9:ff62b20f7000 87 rxBuffer.write(_esc_ch);
Mike Fiore 9:ff62b20f7000 88 _esc_cnt--;
Mike Fiore 9:ff62b20f7000 89 }
Mike Fiore 9:ff62b20f7000 90 }
Mike Fiore 9:ff62b20f7000 91
Mike Fiore 9:ff62b20f7000 92 return false;
Mike Fiore 9:ff62b20f7000 93 }
Mike Fiore 9:ff62b20f7000 94
Mike Fiore 9:ff62b20f7000 95 void ATSerial::clearEscaped() {
Mike Fiore 9:ff62b20f7000 96 _esc_cnt = 0;
Mike Fiore 9:ff62b20f7000 97 _escaped = false;
Mike Fiore 9:ff62b20f7000 98 }
Mike Fiore 9:ff62b20f7000 99
Mike Fiore 9:ff62b20f7000 100 void ATSerial::handleRead()
Mike Fiore 9:ff62b20f7000 101 {
Mike Fiore 9:ff62b20f7000 102 char byte = _serial->getc();
Mike Fiore 9:ff62b20f7000 103 int now = timer.read_ms();
Mike Fiore 9:ff62b20f7000 104
Mike Fiore 9:ff62b20f7000 105 // Have we seen 3 esc chars but this char is before 1 sec end guard time
Mike Fiore 9:ff62b20f7000 106 if (_esc_cnt == 3 && (now - _last_time < 1000)) {
Mike Fiore 9:ff62b20f7000 107 // Write the three chars we held back
Mike Fiore 9:ff62b20f7000 108 while (_esc_cnt) {
Mike Fiore 9:ff62b20f7000 109 rxBuffer.write(_esc_ch);
Mike Fiore 9:ff62b20f7000 110 _esc_cnt--;
Mike Fiore 9:ff62b20f7000 111 }
Mike Fiore 9:ff62b20f7000 112 } else if (byte == _esc_ch) {
Mike Fiore 9:ff62b20f7000 113 // Has 1 second passed before last char
Mike Fiore 9:ff62b20f7000 114 if (now - _last_time > 1000) {
Mike Fiore 9:ff62b20f7000 115 _esc_cnt = 1;
Mike Fiore 9:ff62b20f7000 116 // Is this second or third esc char
Mike Fiore 9:ff62b20f7000 117 } else if (_esc_cnt > 0 && _esc_cnt < 3) {
Mike Fiore 9:ff62b20f7000 118 _esc_cnt++;
Mike Fiore 9:ff62b20f7000 119 }
Mike Fiore 9:ff62b20f7000 120 } else if (_esc_cnt > 0) {
Mike Fiore 9:ff62b20f7000 121 // Write any esc chars held back
Mike Fiore 9:ff62b20f7000 122 while (_esc_cnt) {
Mike Fiore 9:ff62b20f7000 123 rxBuffer.write(_esc_ch);
Mike Fiore 9:ff62b20f7000 124 _esc_cnt--;
Mike Fiore 9:ff62b20f7000 125 }
Mike Fiore 9:ff62b20f7000 126 }
Mike Fiore 9:ff62b20f7000 127
Mike Fiore 9:ff62b20f7000 128 if(_esc_cnt == 0 && rxBuffer.write(byte) != 1) {
Mike Fiore 9:ff62b20f7000 129 // logError("Serial Rx Byte Dropped [%c][0x%02X]", byte, byte);
Mike Fiore 9:ff62b20f7000 130 }
Mike Fiore 9:ff62b20f7000 131
Mike Fiore 9:ff62b20f7000 132 _last_time = timer.read_ms();
Mike Fiore 9:ff62b20f7000 133 }
Mike Fiore 9:ff62b20f7000 134
Mike Fiore 9:ff62b20f7000 135 void ATSerial::escapeChar(char esc) {
Mike Fiore 9:ff62b20f7000 136 _esc_ch = esc;
Mike Fiore 9:ff62b20f7000 137 }
Mike Fiore 9:ff62b20f7000 138
Mike Fiore 9:ff62b20f7000 139 char ATSerial::escapeChar() {
Mike Fiore 9:ff62b20f7000 140 return _esc_ch;
Mike Fiore 9:ff62b20f7000 141 }