Donatien Garnier
NetServices Stack source
Dependents: HelloWorld ServoInterfaceBoardExample1 4180_Lab4
drv/serial/buf/SerialBuf.cpp@0:632c9925f013, 2010-06-11 (annotated)
- Committer:
- donatien
- Date:
- Fri Jun 11 16:05:15 2010 +0000
- Revision:
- 0:632c9925f013
- Child:
- 4:fd826cad83c0
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| donatien | 0:632c9925f013 | 1 | |
| donatien | 0:632c9925f013 | 2 | /* |
| donatien | 0:632c9925f013 | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| donatien | 0:632c9925f013 | 4 | |
| donatien | 0:632c9925f013 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| donatien | 0:632c9925f013 | 6 | of this software and associated documentation files (the "Software"), to deal |
| donatien | 0:632c9925f013 | 7 | in the Software without restriction, including without limitation the rights |
| donatien | 0:632c9925f013 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| donatien | 0:632c9925f013 | 9 | copies of the Software, and to permit persons to whom the Software is |
| donatien | 0:632c9925f013 | 10 | furnished to do so, subject to the following conditions: |
| donatien | 0:632c9925f013 | 11 | |
| donatien | 0:632c9925f013 | 12 | The above copyright notice and this permission notice shall be included in |
| donatien | 0:632c9925f013 | 13 | all copies or substantial portions of the Software. |
| donatien | 0:632c9925f013 | 14 | |
| donatien | 0:632c9925f013 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| donatien | 0:632c9925f013 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| donatien | 0:632c9925f013 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| donatien | 0:632c9925f013 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| donatien | 0:632c9925f013 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| donatien | 0:632c9925f013 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| donatien | 0:632c9925f013 | 21 | THE SOFTWARE. |
| donatien | 0:632c9925f013 | 22 | */ |
| donatien | 0:632c9925f013 | 23 | |
| donatien | 0:632c9925f013 | 24 | #include "SerialBuf.h" |
| donatien | 0:632c9925f013 | 25 | #include "mbed.h" |
| donatien | 0:632c9925f013 | 26 | |
| donatien | 0:632c9925f013 | 27 | //#define __DEBUG |
| donatien | 0:632c9925f013 | 28 | #include "dbg/dbg.h" |
| donatien | 0:632c9925f013 | 29 | |
| donatien | 0:632c9925f013 | 30 | #include "netCfg.h" |
| donatien | 0:632c9925f013 | 31 | #if NET_GPRS |
| donatien | 0:632c9925f013 | 32 | |
| donatien | 0:632c9925f013 | 33 | #if NET_USB_SERIAL |
| donatien | 0:632c9925f013 | 34 | #define m_pStream( a ) (m_pSerial?m_pSerial->a:m_pUsbSerial->a) |
| donatien | 0:632c9925f013 | 35 | #else |
| donatien | 0:632c9925f013 | 36 | #define m_pStream( a ) (m_pSerial->a) |
| donatien | 0:632c9925f013 | 37 | #endif |
| donatien | 0:632c9925f013 | 38 | |
| donatien | 0:632c9925f013 | 39 | SerialBuf::SerialBuf(int len) : m_trmt(false), m_pSerial(NULL), m_intCanReadData(true), m_readMode(false) //Buffer length |
| donatien | 0:632c9925f013 | 40 | #if NET_USB_SERIAL |
| donatien | 0:632c9925f013 | 41 | , m_pUsbSerial(NULL) |
| donatien | 0:632c9925f013 | 42 | #endif |
| donatien | 0:632c9925f013 | 43 | { |
| donatien | 0:632c9925f013 | 44 | m_buf = new char[len]; |
| donatien | 0:632c9925f013 | 45 | m_bufLen=len; |
| donatien | 0:632c9925f013 | 46 | m_pRead=m_buf; |
| donatien | 0:632c9925f013 | 47 | m_pReadStart=m_buf; |
| donatien | 0:632c9925f013 | 48 | m_pReadByInt=m_buf; |
| donatien | 0:632c9925f013 | 49 | m_pWrite=m_buf; |
| donatien | 0:632c9925f013 | 50 | } |
| donatien | 0:632c9925f013 | 51 | |
| donatien | 0:632c9925f013 | 52 | SerialBuf::~SerialBuf() |
| donatien | 0:632c9925f013 | 53 | { |
| donatien | 0:632c9925f013 | 54 | delete[] m_buf; |
| donatien | 0:632c9925f013 | 55 | } |
| donatien | 0:632c9925f013 | 56 | |
| donatien | 0:632c9925f013 | 57 | void SerialBuf::attach(Serial* pSerial) |
| donatien | 0:632c9925f013 | 58 | { |
| donatien | 0:632c9925f013 | 59 | m_pSerial = pSerial; |
| donatien | 0:632c9925f013 | 60 | m_pSerial->attach<SerialBuf>(this, &SerialBuf::onSerialInterrupt); |
| donatien | 0:632c9925f013 | 61 | // onSerialInterrupt(); //Flush hw buffer into current buf |
| donatien | 0:632c9925f013 | 62 | } |
| donatien | 0:632c9925f013 | 63 | |
| donatien | 0:632c9925f013 | 64 | #if NET_USB_SERIAL |
| donatien | 0:632c9925f013 | 65 | void SerialBuf::attach(UsbSerial* pUsbSerial) |
| donatien | 0:632c9925f013 | 66 | { |
| donatien | 0:632c9925f013 | 67 | m_pUsbSerial = pUsbSerial; |
| donatien | 0:632c9925f013 | 68 | //m_pUsbSerial->attach<SerialBuf>(this, &SerialBuf::onSerialInterrupt); |
| donatien | 0:632c9925f013 | 69 | m_usbTick.attach_us<SerialBuf>(this, &SerialBuf::onSerialInterrupt, 10000); |
| donatien | 0:632c9925f013 | 70 | } |
| donatien | 0:632c9925f013 | 71 | #endif |
| donatien | 0:632c9925f013 | 72 | |
| donatien | 0:632c9925f013 | 73 | void SerialBuf::detach() |
| donatien | 0:632c9925f013 | 74 | { |
| donatien | 0:632c9925f013 | 75 | if(m_pSerial) |
| donatien | 0:632c9925f013 | 76 | { |
| donatien | 0:632c9925f013 | 77 | m_pSerial->attach(0); |
| donatien | 0:632c9925f013 | 78 | m_pSerial = NULL; |
| donatien | 0:632c9925f013 | 79 | } |
| donatien | 0:632c9925f013 | 80 | #if NET_USB_SERIAL |
| donatien | 0:632c9925f013 | 81 | else if(m_pUsbSerial) |
| donatien | 0:632c9925f013 | 82 | { |
| donatien | 0:632c9925f013 | 83 | m_usbTick.detach(); |
| donatien | 0:632c9925f013 | 84 | m_pUsbSerial = NULL; |
| donatien | 0:632c9925f013 | 85 | } |
| donatien | 0:632c9925f013 | 86 | #endif |
| donatien | 0:632c9925f013 | 87 | } |
| donatien | 0:632c9925f013 | 88 | |
| donatien | 0:632c9925f013 | 89 | |
| donatien | 0:632c9925f013 | 90 | void SerialBuf::onSerialInterrupt() //Callback from m_pSerial |
| donatien | 0:632c9925f013 | 91 | { |
| donatien | 0:632c9925f013 | 92 | //DBG("\r\n[INT]"); |
| donatien | 0:632c9925f013 | 93 | // Timer tmr; |
| donatien | 0:632c9925f013 | 94 | // tmr.start(); |
| donatien | 0:632c9925f013 | 95 | // static volatile bool incompleteData = true; |
| donatien | 0:632c9925f013 | 96 | // static volatile char* pLastIntReadPos = m_buf; |
| donatien | 0:632c9925f013 | 97 | if(!(m_pStream(readable()))) |
| donatien | 0:632c9925f013 | 98 | { |
| donatien | 0:632c9925f013 | 99 | return; |
| donatien | 0:632c9925f013 | 100 | } |
| donatien | 0:632c9925f013 | 101 | int len=0; |
| donatien | 0:632c9925f013 | 102 | do |
| donatien | 0:632c9925f013 | 103 | { |
| donatien | 0:632c9925f013 | 104 | if(room()>0) |
| donatien | 0:632c9925f013 | 105 | { |
| donatien | 0:632c9925f013 | 106 | len++; |
| donatien | 0:632c9925f013 | 107 | #ifdef __DEBUGVERBOSE |
| donatien | 0:632c9925f013 | 108 | char c = m_pStream(getc()); |
| donatien | 0:632c9925f013 | 109 | DBG("\r\n[%c]",c); |
| donatien | 0:632c9925f013 | 110 | put(c); |
| donatien | 0:632c9925f013 | 111 | #else |
| donatien | 0:632c9925f013 | 112 | put(m_pStream(getc())); |
| donatien | 0:632c9925f013 | 113 | #endif |
| donatien | 0:632c9925f013 | 114 | } |
| donatien | 0:632c9925f013 | 115 | else |
| donatien | 0:632c9925f013 | 116 | { |
| donatien | 0:632c9925f013 | 117 | DBG("\r\nWARN: SerialBuf Overrun"); |
| donatien | 0:632c9925f013 | 118 | m_pStream(getc()); |
| donatien | 0:632c9925f013 | 119 | } |
| donatien | 0:632c9925f013 | 120 | } while(m_pStream(readable())); |
| donatien | 0:632c9925f013 | 121 | // DBG("\r\n[/INT]=*%d*\r\n w len=*%d*",tmr.read_us(),len); |
| donatien | 0:632c9925f013 | 122 | |
| donatien | 0:632c9925f013 | 123 | if( m_intCanReadData ) |
| donatien | 0:632c9925f013 | 124 | { |
| donatien | 0:632c9925f013 | 125 | volatile bool u_readMode = m_readMode; //Save User context on interrupt |
| donatien | 0:632c9925f013 | 126 | volatile bool handled = onRead(); |
| donatien | 0:632c9925f013 | 127 | if(handled) |
| donatien | 0:632c9925f013 | 128 | { |
| donatien | 0:632c9925f013 | 129 | m_pReadByInt = m_pRead; |
| donatien | 0:632c9925f013 | 130 | if(m_pRead==m_pReadStart) |
| donatien | 0:632c9925f013 | 131 | { |
| donatien | 0:632c9925f013 | 132 | //Data has been processed |
| donatien | 0:632c9925f013 | 133 | } |
| donatien | 0:632c9925f013 | 134 | else |
| donatien | 0:632c9925f013 | 135 | { |
| donatien | 0:632c9925f013 | 136 | m_pRead = m_pReadStart; |
| donatien | 0:632c9925f013 | 137 | m_intCanReadData = false; |
| donatien | 0:632c9925f013 | 138 | //Data has to be processed in user space |
| donatien | 0:632c9925f013 | 139 | } |
| donatien | 0:632c9925f013 | 140 | } |
| donatien | 0:632c9925f013 | 141 | setReadMode( u_readMode ); |
| donatien | 0:632c9925f013 | 142 | } |
| donatien | 0:632c9925f013 | 143 | |
| donatien | 0:632c9925f013 | 144 | |
| donatien | 0:632c9925f013 | 145 | #if 0 |
| donatien | 0:632c9925f013 | 146 | if( incompleteData || ( pLastIntReadPos != m_pRead ) ) |
| donatien | 0:632c9925f013 | 147 | { |
| donatien | 0:632c9925f013 | 148 | bool u_readMode = m_readMode; //Save User context on interrupt |
| donatien | 0:632c9925f013 | 149 | incompleteData = onRead(); |
| donatien | 0:632c9925f013 | 150 | if(!incompleteData) |
| donatien | 0:632c9925f013 | 151 | m_pRead = m_pReadStart; |
| donatien | 0:632c9925f013 | 152 | pLastIntReadPos = m_pRead; |
| donatien | 0:632c9925f013 | 153 | |
| donatien | 0:632c9925f013 | 154 | } |
| donatien | 0:632c9925f013 | 155 | #endif |
| donatien | 0:632c9925f013 | 156 | |
| donatien | 0:632c9925f013 | 157 | } |
| donatien | 0:632c9925f013 | 158 | |
| donatien | 0:632c9925f013 | 159 | char SerialBuf::getc() |
| donatien | 0:632c9925f013 | 160 | { |
| donatien | 0:632c9925f013 | 161 | // DBG("\r\n\[GETC]"); |
| donatien | 0:632c9925f013 | 162 | #if 0 |
| donatien | 0:632c9925f013 | 163 | if(m_trmt) //Was transmitting |
| donatien | 0:632c9925f013 | 164 | { |
| donatien | 0:632c9925f013 | 165 | DBG("\r\n<\r\n"); |
| donatien | 0:632c9925f013 | 166 | m_trmt=false; |
| donatien | 0:632c9925f013 | 167 | } |
| donatien | 0:632c9925f013 | 168 | #endif |
| donatien | 0:632c9925f013 | 169 | char c; |
| donatien | 0:632c9925f013 | 170 | c = get(); |
| donatien | 0:632c9925f013 | 171 | DBG("%c", c); |
| donatien | 0:632c9925f013 | 172 | // DBG("\r\n[/GETC]"); |
| donatien | 0:632c9925f013 | 173 | return c; |
| donatien | 0:632c9925f013 | 174 | } |
| donatien | 0:632c9925f013 | 175 | |
| donatien | 0:632c9925f013 | 176 | void SerialBuf::putc(char c) |
| donatien | 0:632c9925f013 | 177 | { |
| donatien | 0:632c9925f013 | 178 | #if 0 |
| donatien | 0:632c9925f013 | 179 | if(!m_trmt) //Was receiving |
| donatien | 0:632c9925f013 | 180 | { |
| donatien | 0:632c9925f013 | 181 | DBG("\r\n>\r\n"); |
| donatien | 0:632c9925f013 | 182 | m_trmt=true; |
| donatien | 0:632c9925f013 | 183 | } |
| donatien | 0:632c9925f013 | 184 | #endif |
| donatien | 0:632c9925f013 | 185 | // m_pSerial->writeable(); |
| donatien | 0:632c9925f013 | 186 | // while(!m_pSerial->writeable() /*|| m_pSerial->readable()*/) |
| donatien | 0:632c9925f013 | 187 | // { |
| donatien | 0:632c9925f013 | 188 | // wait_us(100); |
| donatien | 0:632c9925f013 | 189 | // DBG("\r\nWait...\r\n"); |
| donatien | 0:632c9925f013 | 190 | // } |
| donatien | 0:632c9925f013 | 191 | /* |
| donatien | 0:632c9925f013 | 192 | NVIC_DisableIRQ(UART1_IRQn); |
| donatien | 0:632c9925f013 | 193 | NVIC_DisableIRQ(UART2_IRQn); |
| donatien | 0:632c9925f013 | 194 | NVIC_DisableIRQ(UART3_IRQn); |
| donatien | 0:632c9925f013 | 195 | */ |
| donatien | 0:632c9925f013 | 196 | // onSerialInterrupt(); |
| donatien | 0:632c9925f013 | 197 | m_pStream(putc(c)); |
| donatien | 0:632c9925f013 | 198 | /* NVIC_EnableIRQ(UART1_IRQn); |
| donatien | 0:632c9925f013 | 199 | NVIC_EnableIRQ(UART2_IRQn); |
| donatien | 0:632c9925f013 | 200 | NVIC_EnableIRQ(UART3_IRQn); |
| donatien | 0:632c9925f013 | 201 | */ |
| donatien | 0:632c9925f013 | 202 | DBG("%c", c); |
| donatien | 0:632c9925f013 | 203 | } |
| donatien | 0:632c9925f013 | 204 | |
| donatien | 0:632c9925f013 | 205 | /* Buffer Stuff */ |
| donatien | 0:632c9925f013 | 206 | |
| donatien | 0:632c9925f013 | 207 | bool SerialBuf::readable() |
| donatien | 0:632c9925f013 | 208 | { |
| donatien | 0:632c9925f013 | 209 | // onSerialInterrupt(); //Flush hw buffer into current buf |
| donatien | 0:632c9925f013 | 210 | // DBG("\r\nLen=%d",len()); |
| donatien | 0:632c9925f013 | 211 | return (len()>0); |
| donatien | 0:632c9925f013 | 212 | } |
| donatien | 0:632c9925f013 | 213 | |
| donatien | 0:632c9925f013 | 214 | bool SerialBuf::writeable() |
| donatien | 0:632c9925f013 | 215 | { |
| donatien | 0:632c9925f013 | 216 | return m_pStream(writeable()); |
| donatien | 0:632c9925f013 | 217 | } |
| donatien | 0:632c9925f013 | 218 | |
| donatien | 0:632c9925f013 | 219 | void SerialBuf::setReadMode(bool readMode) //If true, keeps chars in buf when read, false by default |
| donatien | 0:632c9925f013 | 220 | { |
| donatien | 0:632c9925f013 | 221 | if(m_readMode == true && readMode == false) |
| donatien | 0:632c9925f013 | 222 | { |
| donatien | 0:632c9925f013 | 223 | //Trash bytes that have been read |
| donatien | 0:632c9925f013 | 224 | flushRead(); |
| donatien | 0:632c9925f013 | 225 | } |
| donatien | 0:632c9925f013 | 226 | m_readMode=readMode; |
| donatien | 0:632c9925f013 | 227 | } |
| donatien | 0:632c9925f013 | 228 | |
| donatien | 0:632c9925f013 | 229 | void SerialBuf::flushRead() //Delete chars that have been read (only useful with readMode = true) |
| donatien | 0:632c9925f013 | 230 | { |
| donatien | 0:632c9925f013 | 231 | m_pReadStart = m_pRead; |
| donatien | 0:632c9925f013 | 232 | } |
| donatien | 0:632c9925f013 | 233 | |
| donatien | 0:632c9925f013 | 234 | void SerialBuf::resetRead() //Go back to initial read position (only useful with readMode = true) |
| donatien | 0:632c9925f013 | 235 | { |
| donatien | 0:632c9925f013 | 236 | m_pRead = m_pReadStart; |
| donatien | 0:632c9925f013 | 237 | } |
| donatien | 0:632c9925f013 | 238 | |
| donatien | 0:632c9925f013 | 239 | bool SerialBuf::onRead() |
| donatien | 0:632c9925f013 | 240 | { |
| donatien | 0:632c9925f013 | 241 | return false; |
| donatien | 0:632c9925f013 | 242 | //Nothing here |
| donatien | 0:632c9925f013 | 243 | } |
| donatien | 0:632c9925f013 | 244 | |
| donatien | 0:632c9925f013 | 245 | char SerialBuf::get() //Get a char from buf |
| donatien | 0:632c9925f013 | 246 | { |
| donatien | 0:632c9925f013 | 247 | //WARN: Must call len() before |
| donatien | 0:632c9925f013 | 248 | char c = *m_pRead; |
| donatien | 0:632c9925f013 | 249 | m_pRead++; |
| donatien | 0:632c9925f013 | 250 | |
| donatien | 0:632c9925f013 | 251 | if(m_pRead>=m_buf+m_bufLen) |
| donatien | 0:632c9925f013 | 252 | m_pRead=m_buf; |
| donatien | 0:632c9925f013 | 253 | |
| donatien | 0:632c9925f013 | 254 | if(!m_readMode) //If readmode=false, trash this char |
| donatien | 0:632c9925f013 | 255 | m_pReadStart=m_pRead; |
| donatien | 0:632c9925f013 | 256 | |
| donatien | 0:632c9925f013 | 257 | if(m_pRead==m_pReadByInt) //Next message can be processed by interrupt |
| donatien | 0:632c9925f013 | 258 | m_intCanReadData = true; |
| donatien | 0:632c9925f013 | 259 | /* else if(m_intCanReadData) //Increment this address |
| donatien | 0:632c9925f013 | 260 | m_pReadByInt=m_pRead;*/ |
| donatien | 0:632c9925f013 | 261 | return c; |
| donatien | 0:632c9925f013 | 262 | } |
| donatien | 0:632c9925f013 | 263 | |
| donatien | 0:632c9925f013 | 264 | void SerialBuf::put(char c) //Put a char in buf |
| donatien | 0:632c9925f013 | 265 | { |
| donatien | 0:632c9925f013 | 266 | //WARN: Must call room() before |
| donatien | 0:632c9925f013 | 267 | *m_pWrite = c; |
| donatien | 0:632c9925f013 | 268 | m_pWrite++; |
| donatien | 0:632c9925f013 | 269 | if(m_pWrite>=m_buf+m_bufLen) |
| donatien | 0:632c9925f013 | 270 | m_pWrite=m_buf; |
| donatien | 0:632c9925f013 | 271 | } |
| donatien | 0:632c9925f013 | 272 | |
| donatien | 0:632c9925f013 | 273 | int SerialBuf::room() //Return room available in buf |
| donatien | 0:632c9925f013 | 274 | { |
| donatien | 0:632c9925f013 | 275 | //return m_bufLen - len() - 1; //-1 is to avoid loop |
| donatien | 0:632c9925f013 | 276 | if ( m_pReadStart > m_pWrite ) |
| donatien | 0:632c9925f013 | 277 | return ( m_pReadStart - m_pWrite - 1 ); |
| donatien | 0:632c9925f013 | 278 | else |
| donatien | 0:632c9925f013 | 279 | return m_bufLen - ( m_pWrite - m_pReadStart ) - 1; |
| donatien | 0:632c9925f013 | 280 | } |
| donatien | 0:632c9925f013 | 281 | |
| donatien | 0:632c9925f013 | 282 | int SerialBuf::len() //Return chars length in buf |
| donatien | 0:632c9925f013 | 283 | { |
| donatien | 0:632c9925f013 | 284 | if ( m_pWrite >= m_pRead ) |
| donatien | 0:632c9925f013 | 285 | return ( m_pWrite - m_pRead ); |
| donatien | 0:632c9925f013 | 286 | else |
| donatien | 0:632c9925f013 | 287 | return m_bufLen - ( m_pRead - m_pWrite ); // = ( ( m_buf + m_bufLen) - m_pRead ) + ( m_pWrite - m_buf ) |
| donatien | 0:632c9925f013 | 288 | } |
| donatien | 0:632c9925f013 | 289 | |
| donatien | 0:632c9925f013 | 290 | #endif |