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drv/serial/lwip/sio.cpp@8:1fb1dbb9ad9e, 2013-03-06 (annotated)

Committer:
cwang365
Date:
Wed Mar 06 00:34:07 2013 +0000
Revision:
8:1fb1dbb9ad9e
Parent:
0:ac1725ba162c 
old net services

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segundo 0:ac1725ba162c 1
segundo 0:ac1725ba162c 2 /*
segundo 0:ac1725ba162c 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
segundo 0:ac1725ba162c 4
segundo 0:ac1725ba162c 5 Permission is hereby granted, free of charge, to any person obtaining a copy
segundo 0:ac1725ba162c 6 of this software and associated documentation files (the "Software"), to deal
segundo 0:ac1725ba162c 7 in the Software without restriction, including without limitation the rights
segundo 0:ac1725ba162c 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
segundo 0:ac1725ba162c 9 copies of the Software, and to permit persons to whom the Software is
segundo 0:ac1725ba162c 10 furnished to do so, subject to the following conditions:
segundo 0:ac1725ba162c 11
segundo 0:ac1725ba162c 12 The above copyright notice and this permission notice shall be included in
segundo 0:ac1725ba162c 13 all copies or substantial portions of the Software.
segundo 0:ac1725ba162c 14
segundo 0:ac1725ba162c 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
segundo 0:ac1725ba162c 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
segundo 0:ac1725ba162c 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
segundo 0:ac1725ba162c 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
segundo 0:ac1725ba162c 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
segundo 0:ac1725ba162c 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
segundo 0:ac1725ba162c 21 THE SOFTWARE.
segundo 0:ac1725ba162c 22 */
segundo 0:ac1725ba162c 23
segundo 0:ac1725ba162c 24 /*
segundo 0:ac1725ba162c 25
segundo 0:ac1725ba162c 26 This is a wrapper around Serial if for lwIP (acts as a serial driver)
segundo 0:ac1725ba162c 27
segundo 0:ac1725ba162c 28 See sio.h for functions to be implemented
segundo 0:ac1725ba162c 29
segundo 0:ac1725ba162c 30 sio_fd_t is a void* defined type, we use it as a SerialBuf ptr
segundo 0:ac1725ba162c 31
segundo 0:ac1725ba162c 32
segundo 0:ac1725ba162c 33
segundo 0:ac1725ba162c 34 */
segundo 0:ac1725ba162c 35
segundo 0:ac1725ba162c 36
segundo 0:ac1725ba162c 37 #include "netCfg.h"
segundo 0:ac1725ba162c 38 #if NET_PPP
segundo 0:ac1725ba162c 39
segundo 0:ac1725ba162c 40 //#define MAX_SERIAL_PORTS 8
segundo 0:ac1725ba162c 41
segundo 0:ac1725ba162c 42 #include "lwip/sio.h"
segundo 0:ac1725ba162c 43 #include "mbed.h"
segundo 0:ac1725ba162c 44 //#include "sioMgr.h"
segundo 0:ac1725ba162c 45 #include "drv/serial/buf/SerialBuf.h"
segundo 0:ac1725ba162c 46
segundo 0:ac1725ba162c 47 //#define __DEBUG
segundo 0:ac1725ba162c 48 #include "dbg/dbg.h"
segundo 0:ac1725ba162c 49
segundo 0:ac1725ba162c 50 //extern "C" {
segundo 0:ac1725ba162c 51
segundo 0:ac1725ba162c 52 /**
segundo 0:ac1725ba162c 53 * Opens a serial device for communication.
segundo 0:ac1725ba162c 54 *
segundo 0:ac1725ba162c 55 * @param devnum device number
segundo 0:ac1725ba162c 56 * @return handle to serial device if successful, NULL otherwise
segundo 0:ac1725ba162c 57 */
segundo 0:ac1725ba162c 58 sio_fd_t sio_open(u8_t devnum)
segundo 0:ac1725ba162c 59 {
segundo 0:ac1725ba162c 60 #if 0
segundo 0:ac1725ba162c 61 SerialBuf* pIf = SioMgr::getIf(devnum);
segundo 0:ac1725ba162c 62 if(pIf == NULL)
segundo 0:ac1725ba162c 63 return NULL;
segundo 0:ac1725ba162c 64
segundo 0:ac1725ba162c 65 //Got a SerialBuf* object
segundo 0:ac1725ba162c 66 //WARN: It HAS to be initialised (instanciated + attached to a Serial obj)
segundo 0:ac1725ba162c 67
segundo 0:ac1725ba162c 68 return (sio_fd_t) pIf;
segundo 0:ac1725ba162c 69 #endif
segundo 0:ac1725ba162c 70 return NULL;
segundo 0:ac1725ba162c 71 }
segundo 0:ac1725ba162c 72
segundo 0:ac1725ba162c 73 /**
segundo 0:ac1725ba162c 74 * Sends a single character to the serial device.
segundo 0:ac1725ba162c 75 *
segundo 0:ac1725ba162c 76 * @param c character to send
segundo 0:ac1725ba162c 77 * @param fd serial device handle
segundo 0:ac1725ba162c 78 *
segundo 0:ac1725ba162c 79 * @note This function will block until the character can be sent.
segundo 0:ac1725ba162c 80 */
segundo 0:ac1725ba162c 81 void sio_send(u8_t c, sio_fd_t fd)
segundo 0:ac1725ba162c 82 {
segundo 0:ac1725ba162c 83 SerialBuf* pIf = (SerialBuf*) fd;
segundo 0:ac1725ba162c 84 //while(!pIf->writeable());
segundo 0:ac1725ba162c 85 pIf->putc( (char) c );
segundo 0:ac1725ba162c 86 }
segundo 0:ac1725ba162c 87
segundo 0:ac1725ba162c 88 /**
segundo 0:ac1725ba162c 89 * Receives a single character from the serial device.
segundo 0:ac1725ba162c 90 *
segundo 0:ac1725ba162c 91 * @param fd serial device handle
segundo 0:ac1725ba162c 92 *
segundo 0:ac1725ba162c 93 * @note This function will block until a character is received.
segundo 0:ac1725ba162c 94 */
segundo 0:ac1725ba162c 95 u8_t sio_recv(sio_fd_t fd)
segundo 0:ac1725ba162c 96 {
segundo 0:ac1725ba162c 97 SerialBuf* pIf = (SerialBuf*) fd;
segundo 0:ac1725ba162c 98 pIf->setReadMode(false);
segundo 0:ac1725ba162c 99 while(!pIf->readable());
segundo 0:ac1725ba162c 100 return (u8_t) pIf->getc();
segundo 0:ac1725ba162c 101 }
segundo 0:ac1725ba162c 102
segundo 0:ac1725ba162c 103 /**
segundo 0:ac1725ba162c 104 * Reads from the serial device.
segundo 0:ac1725ba162c 105 *
segundo 0:ac1725ba162c 106 * @param fd serial device handle
segundo 0:ac1725ba162c 107 * @param data pointer to data buffer for receiving
segundo 0:ac1725ba162c 108 * @param len maximum length (in bytes) of data to receive
segundo 0:ac1725ba162c 109 * @return number of bytes actually received - may be 0 if aborted by sio_read_abort
segundo 0:ac1725ba162c 110 *
segundo 0:ac1725ba162c 111 * @note This function will block until data can be received. The blocking
segundo 0:ac1725ba162c 112 * can be cancelled by calling sio_read_abort().
segundo 0:ac1725ba162c 113 */
segundo 0:ac1725ba162c 114 static volatile bool m_abort = false;
segundo 0:ac1725ba162c 115 u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
segundo 0:ac1725ba162c 116 {
segundo 0:ac1725ba162c 117 u32_t recvd = 0; //bytes received
segundo 0:ac1725ba162c 118 SerialBuf* pIf = (SerialBuf*) fd;
segundo 0:ac1725ba162c 119 pIf->setReadMode(false);
segundo 0:ac1725ba162c 120 while(!m_abort && len)
segundo 0:ac1725ba162c 121 {
segundo 0:ac1725ba162c 122 while(!pIf->readable());
segundo 0:ac1725ba162c 123 *data = (u8_t) pIf->getc();
segundo 0:ac1725ba162c 124 data++;
segundo 0:ac1725ba162c 125 len--;
segundo 0:ac1725ba162c 126 recvd++;
segundo 0:ac1725ba162c 127 }
segundo 0:ac1725ba162c 128 m_abort = false;
segundo 0:ac1725ba162c 129 return recvd;
segundo 0:ac1725ba162c 130 }
segundo 0:ac1725ba162c 131
segundo 0:ac1725ba162c 132 /**
segundo 0:ac1725ba162c 133 * Tries to read from the serial device. Same as sio_read but returns
segundo 0:ac1725ba162c 134 * immediately if no data is available and never blocks.
segundo 0:ac1725ba162c 135 *
segundo 0:ac1725ba162c 136 * @param fd serial device handle
segundo 0:ac1725ba162c 137 * @param data pointer to data buffer for receiving
segundo 0:ac1725ba162c 138 * @param len maximum length (in bytes) of data to receive
segundo 0:ac1725ba162c 139 * @return number of bytes actually received
segundo 0:ac1725ba162c 140 */
segundo 0:ac1725ba162c 141 u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
segundo 0:ac1725ba162c 142 {
segundo 0:ac1725ba162c 143 u32_t recvd = 0; //bytes received
segundo 0:ac1725ba162c 144 SerialBuf* pIf = (SerialBuf*) fd;
segundo 0:ac1725ba162c 145 pIf->setReadMode(false);
segundo 0:ac1725ba162c 146 while(len)
segundo 0:ac1725ba162c 147 {
segundo 0:ac1725ba162c 148 /* if(!pIf->readable())
segundo 0:ac1725ba162c 149 {
segundo 0:ac1725ba162c 150 wait_ms(4);
segundo 0:ac1725ba162c 151 }*/
segundo 0:ac1725ba162c 152 if(!pIf->readable())
segundo 0:ac1725ba162c 153 {
segundo 0:ac1725ba162c 154 return recvd;
segundo 0:ac1725ba162c 155 }
segundo 0:ac1725ba162c 156 *data = (u8_t) pIf->getc();
segundo 0:ac1725ba162c 157 data++;
segundo 0:ac1725ba162c 158 len--;
segundo 0:ac1725ba162c 159 recvd++;
segundo 0:ac1725ba162c 160 }
segundo 0:ac1725ba162c 161 return recvd;
segundo 0:ac1725ba162c 162 }
segundo 0:ac1725ba162c 163
segundo 0:ac1725ba162c 164 /**
segundo 0:ac1725ba162c 165 * Writes to the serial device.
segundo 0:ac1725ba162c 166 *
segundo 0:ac1725ba162c 167 * @param fd serial device handle
segundo 0:ac1725ba162c 168 * @param data pointer to data to send
segundo 0:ac1725ba162c 169 * @param len length (in bytes) of data to send
segundo 0:ac1725ba162c 170 * @return number of bytes actually sent
segundo 0:ac1725ba162c 171 *
segundo 0:ac1725ba162c 172 * @note This function will block until all data can be sent.
segundo 0:ac1725ba162c 173 */
segundo 0:ac1725ba162c 174 u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
segundo 0:ac1725ba162c 175 {
segundo 0:ac1725ba162c 176 u32_t sent = 0; //bytes sent
segundo 0:ac1725ba162c 177 SerialBuf* pIf = (SerialBuf*) fd;
segundo 0:ac1725ba162c 178 while(len)
segundo 0:ac1725ba162c 179 {
segundo 0:ac1725ba162c 180 while(!pIf->writeable());
segundo 0:ac1725ba162c 181 pIf->putc(*data);
segundo 0:ac1725ba162c 182 data++;
segundo 0:ac1725ba162c 183 len--;
segundo 0:ac1725ba162c 184 sent++;
segundo 0:ac1725ba162c 185 }
segundo 0:ac1725ba162c 186 return sent; //Well, this is bound to be len if no interrupt mechanism
segundo 0:ac1725ba162c 187 }
segundo 0:ac1725ba162c 188
segundo 0:ac1725ba162c 189 /**
segundo 0:ac1725ba162c 190 * Aborts a blocking sio_read() call.
segundo 0:ac1725ba162c 191 *
segundo 0:ac1725ba162c 192 * @param fd serial device handle
segundo 0:ac1725ba162c 193 */
segundo 0:ac1725ba162c 194 void sio_read_abort(sio_fd_t fd)
segundo 0:ac1725ba162c 195 {
segundo 0:ac1725ba162c 196 m_abort = true;
segundo 0:ac1725ba162c 197 }
segundo 0:ac1725ba162c 198
segundo 0:ac1725ba162c 199 //}
segundo 0:ac1725ba162c 200
segundo 0:ac1725ba162c 201 #endif
segundo 0:ac1725ba162c 202