Taylor Gy / Mbed OS 8-0_OneNet_IoT_demo

OneNet_IoT_demo for ASC platform

Dependencies:   Common_lib ESP8266 EdpKit_lib cJSON_lib driver_mbed_HP20x driver_mbed_TH02 wifi_example

Fork of mbed-os-example-esp8266 by ESP8266

esp8266-driver/ESP8266/ATParser/BufferedSerial/BufferedSerial.cpp@1:b4a718e62e0b, 2017-01-12 (annotated)

Committer:
sarahmarshy
Date:
Thu Jan 12 22:05:15 2017 +0000
Revision:
1:b4a718e62e0b
Parent:
0:b887535f68bf 
Update esp8266-driver

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sarahmarshy 1:b4a718e62e0b 1 /**
sarahmarshy 1:b4a718e62e0b 2 * @file BufferedSerial.cpp
sarahmarshy 1:b4a718e62e0b 3 * @brief Software Buffer - Extends mbed Serial functionallity adding irq driven TX and RX
sarahmarshy 1:b4a718e62e0b 4 * @author sam grove
sarahmarshy 1:b4a718e62e0b 5 * @version 1.0
sarahmarshy 1:b4a718e62e0b 6 * @see
sarahmarshy 1:b4a718e62e0b 7 *
sarahmarshy 1:b4a718e62e0b 8 * Copyright (c) 2013
sarahmarshy 1:b4a718e62e0b 9 *
sarahmarshy 1:b4a718e62e0b 10 * Licensed under the Apache License, Version 2.0 (the "License");
sarahmarshy 1:b4a718e62e0b 11 * you may not use this file except in compliance with the License.
sarahmarshy 1:b4a718e62e0b 12 * You may obtain a copy of the License at
sarahmarshy 1:b4a718e62e0b 13 *
sarahmarshy 1:b4a718e62e0b 14 * http://www.apache.org/licenses/LICENSE-2.0
sarahmarshy 1:b4a718e62e0b 15 *
sarahmarshy 1:b4a718e62e0b 16 * Unless required by applicable law or agreed to in writing, software
sarahmarshy 1:b4a718e62e0b 17 * distributed under the License is distributed on an "AS IS" BASIS,
sarahmarshy 1:b4a718e62e0b 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sarahmarshy 1:b4a718e62e0b 19 * See the License for the specific language governing permissions and
sarahmarshy 1:b4a718e62e0b 20 * limitations under the License.
sarahmarshy 1:b4a718e62e0b 21 */
sarahmarshy 1:b4a718e62e0b 22
sarahmarshy 1:b4a718e62e0b 23 #include "BufferedSerial.h"
sarahmarshy 1:b4a718e62e0b 24 #include <stdarg.h>
sarahmarshy 1:b4a718e62e0b 25
sarahmarshy 1:b4a718e62e0b 26 extern "C" int BufferedPrintfC(void *stream, int size, const char* format, va_list arg);
sarahmarshy 1:b4a718e62e0b 27
sarahmarshy 1:b4a718e62e0b 28 BufferedSerial::BufferedSerial(PinName tx, PinName rx, uint32_t buf_size, uint32_t tx_multiple, const char* name)
sarahmarshy 1:b4a718e62e0b 29 : RawSerial(tx, rx) , _rxbuf(buf_size), _txbuf((uint32_t)(tx_multiple*buf_size))
sarahmarshy 1:b4a718e62e0b 30 {
sarahmarshy 1:b4a718e62e0b 31 RawSerial::attach(this, &BufferedSerial::rxIrq, Serial::RxIrq);
sarahmarshy 1:b4a718e62e0b 32 this->_buf_size = buf_size;
sarahmarshy 1:b4a718e62e0b 33 this->_tx_multiple = tx_multiple;
sarahmarshy 1:b4a718e62e0b 34 return;
sarahmarshy 1:b4a718e62e0b 35 }
sarahmarshy 1:b4a718e62e0b 36
sarahmarshy 1:b4a718e62e0b 37 BufferedSerial::~BufferedSerial(void)
sarahmarshy 1:b4a718e62e0b 38 {
sarahmarshy 1:b4a718e62e0b 39 RawSerial::attach(NULL, RawSerial::RxIrq);
sarahmarshy 1:b4a718e62e0b 40 RawSerial::attach(NULL, RawSerial::TxIrq);
sarahmarshy 1:b4a718e62e0b 41
sarahmarshy 1:b4a718e62e0b 42 return;
sarahmarshy 1:b4a718e62e0b 43 }
sarahmarshy 1:b4a718e62e0b 44
sarahmarshy 1:b4a718e62e0b 45 int BufferedSerial::readable(void)
sarahmarshy 1:b4a718e62e0b 46 {
sarahmarshy 1:b4a718e62e0b 47 return _rxbuf.available(); // note: look if things are in the buffer
sarahmarshy 1:b4a718e62e0b 48 }
sarahmarshy 1:b4a718e62e0b 49
sarahmarshy 1:b4a718e62e0b 50 int BufferedSerial::writeable(void)
sarahmarshy 1:b4a718e62e0b 51 {
sarahmarshy 1:b4a718e62e0b 52 return 1; // buffer allows overwriting by design, always true
sarahmarshy 1:b4a718e62e0b 53 }
sarahmarshy 1:b4a718e62e0b 54
sarahmarshy 1:b4a718e62e0b 55 int BufferedSerial::getc(void)
sarahmarshy 1:b4a718e62e0b 56 {
sarahmarshy 1:b4a718e62e0b 57 return _rxbuf;
sarahmarshy 1:b4a718e62e0b 58 }
sarahmarshy 1:b4a718e62e0b 59
sarahmarshy 1:b4a718e62e0b 60 int BufferedSerial::putc(int c)
sarahmarshy 1:b4a718e62e0b 61 {
sarahmarshy 1:b4a718e62e0b 62 _txbuf = (char)c;
sarahmarshy 1:b4a718e62e0b 63 BufferedSerial::prime();
sarahmarshy 1:b4a718e62e0b 64
sarahmarshy 1:b4a718e62e0b 65 return c;
sarahmarshy 1:b4a718e62e0b 66 }
sarahmarshy 1:b4a718e62e0b 67
sarahmarshy 1:b4a718e62e0b 68 int BufferedSerial::puts(const char *s)
sarahmarshy 1:b4a718e62e0b 69 {
sarahmarshy 1:b4a718e62e0b 70 if (s != NULL) {
sarahmarshy 1:b4a718e62e0b 71 const char* ptr = s;
sarahmarshy 1:b4a718e62e0b 72
sarahmarshy 1:b4a718e62e0b 73 while(*(ptr) != 0) {
sarahmarshy 1:b4a718e62e0b 74 _txbuf = *(ptr++);
sarahmarshy 1:b4a718e62e0b 75 }
sarahmarshy 1:b4a718e62e0b 76 _txbuf = '\n'; // done per puts definition
sarahmarshy 1:b4a718e62e0b 77 BufferedSerial::prime();
sarahmarshy 1:b4a718e62e0b 78
sarahmarshy 1:b4a718e62e0b 79 return (ptr - s) + 1;
sarahmarshy 1:b4a718e62e0b 80 }
sarahmarshy 1:b4a718e62e0b 81 return 0;
sarahmarshy 1:b4a718e62e0b 82 }
sarahmarshy 1:b4a718e62e0b 83
sarahmarshy 1:b4a718e62e0b 84 extern "C" size_t BufferedSerialThunk(void *buf_serial, const void *s, size_t length)
sarahmarshy 1:b4a718e62e0b 85 {
sarahmarshy 1:b4a718e62e0b 86 BufferedSerial *buffered_serial = (BufferedSerial *)buf_serial;
sarahmarshy 1:b4a718e62e0b 87 return buffered_serial->write(s, length);
sarahmarshy 1:b4a718e62e0b 88 }
sarahmarshy 1:b4a718e62e0b 89
sarahmarshy 1:b4a718e62e0b 90 int BufferedSerial::printf(const char* format, ...)
sarahmarshy 1:b4a718e62e0b 91 {
sarahmarshy 1:b4a718e62e0b 92 va_list arg;
sarahmarshy 1:b4a718e62e0b 93 va_start(arg, format);
sarahmarshy 1:b4a718e62e0b 94 int r = BufferedPrintfC((void*)this, this->_buf_size, format, arg);
sarahmarshy 1:b4a718e62e0b 95 va_end(arg);
sarahmarshy 1:b4a718e62e0b 96 return r;
sarahmarshy 1:b4a718e62e0b 97 }
sarahmarshy 1:b4a718e62e0b 98
sarahmarshy 1:b4a718e62e0b 99 ssize_t BufferedSerial::write(const void *s, size_t length)
sarahmarshy 1:b4a718e62e0b 100 {
sarahmarshy 1:b4a718e62e0b 101 if (s != NULL && length > 0) {
sarahmarshy 1:b4a718e62e0b 102 const char* ptr = (const char*)s;
sarahmarshy 1:b4a718e62e0b 103 const char* end = ptr + length;
sarahmarshy 1:b4a718e62e0b 104
sarahmarshy 1:b4a718e62e0b 105 while (ptr != end) {
sarahmarshy 1:b4a718e62e0b 106 _txbuf = *(ptr++);
sarahmarshy 1:b4a718e62e0b 107 }
sarahmarshy 1:b4a718e62e0b 108 BufferedSerial::prime();
sarahmarshy 1:b4a718e62e0b 109
sarahmarshy 1:b4a718e62e0b 110 return ptr - (const char*)s;
sarahmarshy 1:b4a718e62e0b 111 }
sarahmarshy 1:b4a718e62e0b 112 return 0;
sarahmarshy 1:b4a718e62e0b 113 }
sarahmarshy 1:b4a718e62e0b 114
sarahmarshy 1:b4a718e62e0b 115
sarahmarshy 1:b4a718e62e0b 116 void BufferedSerial::rxIrq(void)
sarahmarshy 1:b4a718e62e0b 117 {
sarahmarshy 1:b4a718e62e0b 118 // read from the peripheral and make sure something is available
sarahmarshy 1:b4a718e62e0b 119 if(serial_readable(&_serial)) {
sarahmarshy 1:b4a718e62e0b 120 _rxbuf = serial_getc(&_serial); // if so load them into a buffer
sarahmarshy 1:b4a718e62e0b 121 // trigger callback if necessary
sarahmarshy 1:b4a718e62e0b 122 if (_cbs[RxIrq]) {
sarahmarshy 1:b4a718e62e0b 123 _cbs[RxIrq]();
sarahmarshy 1:b4a718e62e0b 124 }
sarahmarshy 1:b4a718e62e0b 125 }
sarahmarshy 1:b4a718e62e0b 126
sarahmarshy 1:b4a718e62e0b 127 return;
sarahmarshy 1:b4a718e62e0b 128 }
sarahmarshy 1:b4a718e62e0b 129
sarahmarshy 1:b4a718e62e0b 130 void BufferedSerial::txIrq(void)
sarahmarshy 1:b4a718e62e0b 131 {
sarahmarshy 1:b4a718e62e0b 132 // see if there is room in the hardware fifo and if something is in the software fifo
sarahmarshy 1:b4a718e62e0b 133 while(serial_writable(&_serial)) {
sarahmarshy 1:b4a718e62e0b 134 if(_txbuf.available()) {
sarahmarshy 1:b4a718e62e0b 135 serial_putc(&_serial, (int)_txbuf.get());
sarahmarshy 1:b4a718e62e0b 136 } else {
sarahmarshy 1:b4a718e62e0b 137 // disable the TX interrupt when there is nothing left to send
sarahmarshy 1:b4a718e62e0b 138 RawSerial::attach(NULL, RawSerial::TxIrq);
sarahmarshy 1:b4a718e62e0b 139 // trigger callback if necessary
sarahmarshy 1:b4a718e62e0b 140 if (_cbs[TxIrq]) {
sarahmarshy 1:b4a718e62e0b 141 _cbs[TxIrq]();
sarahmarshy 1:b4a718e62e0b 142 }
sarahmarshy 1:b4a718e62e0b 143 break;
sarahmarshy 1:b4a718e62e0b 144 }
sarahmarshy 1:b4a718e62e0b 145 }
sarahmarshy 1:b4a718e62e0b 146
sarahmarshy 1:b4a718e62e0b 147 return;
sarahmarshy 1:b4a718e62e0b 148 }
sarahmarshy 1:b4a718e62e0b 149
sarahmarshy 1:b4a718e62e0b 150 void BufferedSerial::prime(void)
sarahmarshy 1:b4a718e62e0b 151 {
sarahmarshy 1:b4a718e62e0b 152 // if already busy then the irq will pick this up
sarahmarshy 1:b4a718e62e0b 153 if(serial_writable(&_serial)) {
sarahmarshy 1:b4a718e62e0b 154 RawSerial::attach(NULL, RawSerial::TxIrq); // make sure not to cause contention in the irq
sarahmarshy 1:b4a718e62e0b 155 BufferedSerial::txIrq(); // only write to hardware in one place
sarahmarshy 1:b4a718e62e0b 156 RawSerial::attach(this, &BufferedSerial::txIrq, RawSerial::TxIrq);
sarahmarshy 1:b4a718e62e0b 157 }
sarahmarshy 1:b4a718e62e0b 158
sarahmarshy 1:b4a718e62e0b 159 return;
sarahmarshy 1:b4a718e62e0b 160 }
sarahmarshy 1:b4a718e62e0b 161
sarahmarshy 1:b4a718e62e0b 162 void BufferedSerial::attach(Callback<void()> func, IrqType type)
sarahmarshy 1:b4a718e62e0b 163 {
sarahmarshy 1:b4a718e62e0b 164 _cbs[type] = func;
sarahmarshy 1:b4a718e62e0b 165 }
sarahmarshy 1:b4a718e62e0b 166