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NetServices/drv/serial/lwip/sio.cpp@0:4edb816d21e1, 2015-10-16 (annotated)

Committer:
ICTFBI
Date:
Fri Oct 16 14:28:26 2015 +0000
Revision:
0:4edb816d21e1
Pre-update 16-10-15

Who changed what in which revision?

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ICTFBI 0:4edb816d21e1 1
ICTFBI 0:4edb816d21e1 2 /*
ICTFBI 0:4edb816d21e1 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
ICTFBI 0:4edb816d21e1 4
ICTFBI 0:4edb816d21e1 5 Permission is hereby granted, free of charge, to any person obtaining a copy
ICTFBI 0:4edb816d21e1 6 of this software and associated documentation files (the "Software"), to deal
ICTFBI 0:4edb816d21e1 7 in the Software without restriction, including without limitation the rights
ICTFBI 0:4edb816d21e1 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ICTFBI 0:4edb816d21e1 9 copies of the Software, and to permit persons to whom the Software is
ICTFBI 0:4edb816d21e1 10 furnished to do so, subject to the following conditions:
ICTFBI 0:4edb816d21e1 11
ICTFBI 0:4edb816d21e1 12 The above copyright notice and this permission notice shall be included in
ICTFBI 0:4edb816d21e1 13 all copies or substantial portions of the Software.
ICTFBI 0:4edb816d21e1 14
ICTFBI 0:4edb816d21e1 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ICTFBI 0:4edb816d21e1 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ICTFBI 0:4edb816d21e1 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ICTFBI 0:4edb816d21e1 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ICTFBI 0:4edb816d21e1 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ICTFBI 0:4edb816d21e1 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ICTFBI 0:4edb816d21e1 21 THE SOFTWARE.
ICTFBI 0:4edb816d21e1 22 */
ICTFBI 0:4edb816d21e1 23
ICTFBI 0:4edb816d21e1 24 /*
ICTFBI 0:4edb816d21e1 25
ICTFBI 0:4edb816d21e1 26 This is a wrapper around Serial if for lwIP (acts as a serial driver)
ICTFBI 0:4edb816d21e1 27
ICTFBI 0:4edb816d21e1 28 See sio.h for functions to be implemented
ICTFBI 0:4edb816d21e1 29
ICTFBI 0:4edb816d21e1 30 sio_fd_t is a void* defined type, we use it as a SerialBuf ptr
ICTFBI 0:4edb816d21e1 31
ICTFBI 0:4edb816d21e1 32
ICTFBI 0:4edb816d21e1 33
ICTFBI 0:4edb816d21e1 34 */
ICTFBI 0:4edb816d21e1 35
ICTFBI 0:4edb816d21e1 36
ICTFBI 0:4edb816d21e1 37 #include "netCfg.h"
ICTFBI 0:4edb816d21e1 38 #if NET_PPP
ICTFBI 0:4edb816d21e1 39
ICTFBI 0:4edb816d21e1 40 //#define MAX_SERIAL_PORTS 8
ICTFBI 0:4edb816d21e1 41
ICTFBI 0:4edb816d21e1 42 #include "lwip/sio.h"
ICTFBI 0:4edb816d21e1 43 #include "mbed.h"
ICTFBI 0:4edb816d21e1 44 //#include "sioMgr.h"
ICTFBI 0:4edb816d21e1 45 #include "drv/serial/buf/SerialBuf.h"
ICTFBI 0:4edb816d21e1 46
ICTFBI 0:4edb816d21e1 47 //#define __DEBUG
ICTFBI 0:4edb816d21e1 48 #include "dbg/dbg.h"
ICTFBI 0:4edb816d21e1 49
ICTFBI 0:4edb816d21e1 50 //extern "C" {
ICTFBI 0:4edb816d21e1 51
ICTFBI 0:4edb816d21e1 52 /**
ICTFBI 0:4edb816d21e1 53 * Opens a serial device for communication.
ICTFBI 0:4edb816d21e1 54 *
ICTFBI 0:4edb816d21e1 55 * @param devnum device number
ICTFBI 0:4edb816d21e1 56 * @return handle to serial device if successful, NULL otherwise
ICTFBI 0:4edb816d21e1 57 */
ICTFBI 0:4edb816d21e1 58 sio_fd_t sio_open(u8_t devnum)
ICTFBI 0:4edb816d21e1 59 {
ICTFBI 0:4edb816d21e1 60 #if 0
ICTFBI 0:4edb816d21e1 61 SerialBuf* pIf = SioMgr::getIf(devnum);
ICTFBI 0:4edb816d21e1 62 if(pIf == NULL)
ICTFBI 0:4edb816d21e1 63 return NULL;
ICTFBI 0:4edb816d21e1 64
ICTFBI 0:4edb816d21e1 65 //Got a SerialBuf* object
ICTFBI 0:4edb816d21e1 66 //WARN: It HAS to be initialised (instanciated + attached to a Serial obj)
ICTFBI 0:4edb816d21e1 67
ICTFBI 0:4edb816d21e1 68 return (sio_fd_t) pIf;
ICTFBI 0:4edb816d21e1 69 #endif
ICTFBI 0:4edb816d21e1 70 return NULL;
ICTFBI 0:4edb816d21e1 71 }
ICTFBI 0:4edb816d21e1 72
ICTFBI 0:4edb816d21e1 73 /**
ICTFBI 0:4edb816d21e1 74 * Sends a single character to the serial device.
ICTFBI 0:4edb816d21e1 75 *
ICTFBI 0:4edb816d21e1 76 * @param c character to send
ICTFBI 0:4edb816d21e1 77 * @param fd serial device handle
ICTFBI 0:4edb816d21e1 78 *
ICTFBI 0:4edb816d21e1 79 * @note This function will block until the character can be sent.
ICTFBI 0:4edb816d21e1 80 */
ICTFBI 0:4edb816d21e1 81 void sio_send(u8_t c, sio_fd_t fd)
ICTFBI 0:4edb816d21e1 82 {
ICTFBI 0:4edb816d21e1 83 SerialBuf* pIf = (SerialBuf*) fd;
ICTFBI 0:4edb816d21e1 84 //while(!pIf->writeable());
ICTFBI 0:4edb816d21e1 85 pIf->putc( (char) c );
ICTFBI 0:4edb816d21e1 86 }
ICTFBI 0:4edb816d21e1 87
ICTFBI 0:4edb816d21e1 88 /**
ICTFBI 0:4edb816d21e1 89 * Receives a single character from the serial device.
ICTFBI 0:4edb816d21e1 90 *
ICTFBI 0:4edb816d21e1 91 * @param fd serial device handle
ICTFBI 0:4edb816d21e1 92 *
ICTFBI 0:4edb816d21e1 93 * @note This function will block until a character is received.
ICTFBI 0:4edb816d21e1 94 */
ICTFBI 0:4edb816d21e1 95 u8_t sio_recv(sio_fd_t fd)
ICTFBI 0:4edb816d21e1 96 {
ICTFBI 0:4edb816d21e1 97 SerialBuf* pIf = (SerialBuf*) fd;
ICTFBI 0:4edb816d21e1 98 pIf->setReadMode(false);
ICTFBI 0:4edb816d21e1 99 while(!pIf->readable());
ICTFBI 0:4edb816d21e1 100 return (u8_t) pIf->getc();
ICTFBI 0:4edb816d21e1 101 }
ICTFBI 0:4edb816d21e1 102
ICTFBI 0:4edb816d21e1 103 /**
ICTFBI 0:4edb816d21e1 104 * Reads from the serial device.
ICTFBI 0:4edb816d21e1 105 *
ICTFBI 0:4edb816d21e1 106 * @param fd serial device handle
ICTFBI 0:4edb816d21e1 107 * @param data pointer to data buffer for receiving
ICTFBI 0:4edb816d21e1 108 * @param len maximum length (in bytes) of data to receive
ICTFBI 0:4edb816d21e1 109 * @return number of bytes actually received - may be 0 if aborted by sio_read_abort
ICTFBI 0:4edb816d21e1 110 *
ICTFBI 0:4edb816d21e1 111 * @note This function will block until data can be received. The blocking
ICTFBI 0:4edb816d21e1 112 * can be cancelled by calling sio_read_abort().
ICTFBI 0:4edb816d21e1 113 */
ICTFBI 0:4edb816d21e1 114 static volatile bool m_abort = false;
ICTFBI 0:4edb816d21e1 115 u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
ICTFBI 0:4edb816d21e1 116 {
ICTFBI 0:4edb816d21e1 117 u32_t recvd = 0; //bytes received
ICTFBI 0:4edb816d21e1 118 SerialBuf* pIf = (SerialBuf*) fd;
ICTFBI 0:4edb816d21e1 119 pIf->setReadMode(false);
ICTFBI 0:4edb816d21e1 120 while(!m_abort && len)
ICTFBI 0:4edb816d21e1 121 {
ICTFBI 0:4edb816d21e1 122 while(!pIf->readable());
ICTFBI 0:4edb816d21e1 123 *data = (u8_t) pIf->getc();
ICTFBI 0:4edb816d21e1 124 data++;
ICTFBI 0:4edb816d21e1 125 len--;
ICTFBI 0:4edb816d21e1 126 recvd++;
ICTFBI 0:4edb816d21e1 127 }
ICTFBI 0:4edb816d21e1 128 m_abort = false;
ICTFBI 0:4edb816d21e1 129 return recvd;
ICTFBI 0:4edb816d21e1 130 }
ICTFBI 0:4edb816d21e1 131
ICTFBI 0:4edb816d21e1 132 /**
ICTFBI 0:4edb816d21e1 133 * Tries to read from the serial device. Same as sio_read but returns
ICTFBI 0:4edb816d21e1 134 * immediately if no data is available and never blocks.
ICTFBI 0:4edb816d21e1 135 *
ICTFBI 0:4edb816d21e1 136 * @param fd serial device handle
ICTFBI 0:4edb816d21e1 137 * @param data pointer to data buffer for receiving
ICTFBI 0:4edb816d21e1 138 * @param len maximum length (in bytes) of data to receive
ICTFBI 0:4edb816d21e1 139 * @return number of bytes actually received
ICTFBI 0:4edb816d21e1 140 */
ICTFBI 0:4edb816d21e1 141 u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
ICTFBI 0:4edb816d21e1 142 {
ICTFBI 0:4edb816d21e1 143 u32_t recvd = 0; //bytes received
ICTFBI 0:4edb816d21e1 144 SerialBuf* pIf = (SerialBuf*) fd;
ICTFBI 0:4edb816d21e1 145 pIf->setReadMode(false);
ICTFBI 0:4edb816d21e1 146 while(len)
ICTFBI 0:4edb816d21e1 147 {
ICTFBI 0:4edb816d21e1 148 /* if(!pIf->readable())
ICTFBI 0:4edb816d21e1 149 {
ICTFBI 0:4edb816d21e1 150 wait_ms(4);
ICTFBI 0:4edb816d21e1 151 }*/
ICTFBI 0:4edb816d21e1 152 if(!pIf->readable())
ICTFBI 0:4edb816d21e1 153 {
ICTFBI 0:4edb816d21e1 154 return recvd;
ICTFBI 0:4edb816d21e1 155 }
ICTFBI 0:4edb816d21e1 156 *data = (u8_t) pIf->getc();
ICTFBI 0:4edb816d21e1 157 data++;
ICTFBI 0:4edb816d21e1 158 len--;
ICTFBI 0:4edb816d21e1 159 recvd++;
ICTFBI 0:4edb816d21e1 160 }
ICTFBI 0:4edb816d21e1 161 return recvd;
ICTFBI 0:4edb816d21e1 162 }
ICTFBI 0:4edb816d21e1 163
ICTFBI 0:4edb816d21e1 164 /**
ICTFBI 0:4edb816d21e1 165 * Writes to the serial device.
ICTFBI 0:4edb816d21e1 166 *
ICTFBI 0:4edb816d21e1 167 * @param fd serial device handle
ICTFBI 0:4edb816d21e1 168 * @param data pointer to data to send
ICTFBI 0:4edb816d21e1 169 * @param len length (in bytes) of data to send
ICTFBI 0:4edb816d21e1 170 * @return number of bytes actually sent
ICTFBI 0:4edb816d21e1 171 *
ICTFBI 0:4edb816d21e1 172 * @note This function will block until all data can be sent.
ICTFBI 0:4edb816d21e1 173 */
ICTFBI 0:4edb816d21e1 174 u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
ICTFBI 0:4edb816d21e1 175 {
ICTFBI 0:4edb816d21e1 176 u32_t sent = 0; //bytes sent
ICTFBI 0:4edb816d21e1 177 SerialBuf* pIf = (SerialBuf*) fd;
ICTFBI 0:4edb816d21e1 178 while(len)
ICTFBI 0:4edb816d21e1 179 {
ICTFBI 0:4edb816d21e1 180 while(!pIf->writeable());
ICTFBI 0:4edb816d21e1 181 pIf->putc(*data);
ICTFBI 0:4edb816d21e1 182 data++;
ICTFBI 0:4edb816d21e1 183 len--;
ICTFBI 0:4edb816d21e1 184 sent++;
ICTFBI 0:4edb816d21e1 185 }
ICTFBI 0:4edb816d21e1 186 return sent; //Well, this is bound to be len if no interrupt mechanism
ICTFBI 0:4edb816d21e1 187 }
ICTFBI 0:4edb816d21e1 188
ICTFBI 0:4edb816d21e1 189 /**
ICTFBI 0:4edb816d21e1 190 * Aborts a blocking sio_read() call.
ICTFBI 0:4edb816d21e1 191 *
ICTFBI 0:4edb816d21e1 192 * @param fd serial device handle
ICTFBI 0:4edb816d21e1 193 */
ICTFBI 0:4edb816d21e1 194 void sio_read_abort(sio_fd_t fd)
ICTFBI 0:4edb816d21e1 195 {
ICTFBI 0:4edb816d21e1 196 m_abort = true;
ICTFBI 0:4edb816d21e1 197 }
ICTFBI 0:4edb816d21e1 198
ICTFBI 0:4edb816d21e1 199 //}
ICTFBI 0:4edb816d21e1 200
ICTFBI 0:4edb816d21e1 201 #endif
ICTFBI 0:4edb816d21e1 202