Yann Garcia / Mbed 2 deprecated DS130x_I2CApp

This short program illustrates how to use the DS130x_I2C library. My objective is to share the same RTC with Microchip 18F MCU.

Dependencies:   mbed DebugLibrary

NetServices/drv/serial/lwip/sio.cpp@1:995212d326ca, 2011-02-11 (annotated)

Committer:
Yann
Date:
Fri Feb 11 10:17:20 2011 +0000
Revision:
1:995212d326ca
Parent:
0:f30e2135b0db 
V0.0.0.2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Yann 0:f30e2135b0db 1
Yann 0:f30e2135b0db 2 /*
Yann 0:f30e2135b0db 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
Yann 0:f30e2135b0db 4
Yann 0:f30e2135b0db 5 Permission is hereby granted, free of charge, to any person obtaining a copy
Yann 0:f30e2135b0db 6 of this software and associated documentation files (the "Software"), to deal
Yann 0:f30e2135b0db 7 in the Software without restriction, including without limitation the rights
Yann 0:f30e2135b0db 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Yann 0:f30e2135b0db 9 copies of the Software, and to permit persons to whom the Software is
Yann 0:f30e2135b0db 10 furnished to do so, subject to the following conditions:
Yann 0:f30e2135b0db 11
Yann 0:f30e2135b0db 12 The above copyright notice and this permission notice shall be included in
Yann 0:f30e2135b0db 13 all copies or substantial portions of the Software.
Yann 0:f30e2135b0db 14
Yann 0:f30e2135b0db 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Yann 0:f30e2135b0db 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Yann 0:f30e2135b0db 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Yann 0:f30e2135b0db 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Yann 0:f30e2135b0db 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Yann 0:f30e2135b0db 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Yann 0:f30e2135b0db 21 THE SOFTWARE.
Yann 0:f30e2135b0db 22 */
Yann 0:f30e2135b0db 23
Yann 0:f30e2135b0db 24 /*
Yann 0:f30e2135b0db 25
Yann 0:f30e2135b0db 26 This is a wrapper around Serial if for lwIP (acts as a serial driver)
Yann 0:f30e2135b0db 27
Yann 0:f30e2135b0db 28 See sio.h for functions to be implemented
Yann 0:f30e2135b0db 29
Yann 0:f30e2135b0db 30 sio_fd_t is a void* defined type, we use it as a SerialBuf ptr
Yann 0:f30e2135b0db 31
Yann 0:f30e2135b0db 32
Yann 0:f30e2135b0db 33
Yann 0:f30e2135b0db 34 */
Yann 0:f30e2135b0db 35
Yann 0:f30e2135b0db 36
Yann 0:f30e2135b0db 37 #include "netCfg.h"
Yann 0:f30e2135b0db 38 #if NET_PPP
Yann 0:f30e2135b0db 39
Yann 0:f30e2135b0db 40 //#define MAX_SERIAL_PORTS 8
Yann 0:f30e2135b0db 41
Yann 0:f30e2135b0db 42 #include "lwip/sio.h"
Yann 0:f30e2135b0db 43 #include "mbed.h"
Yann 0:f30e2135b0db 44 //#include "sioMgr.h"
Yann 0:f30e2135b0db 45 #include "drv/serial/buf/SerialBuf.h"
Yann 0:f30e2135b0db 46
Yann 0:f30e2135b0db 47 //#define __DEBUG
Yann 0:f30e2135b0db 48 #include "dbg/dbg.h"
Yann 0:f30e2135b0db 49
Yann 0:f30e2135b0db 50 //extern "C" {
Yann 0:f30e2135b0db 51
Yann 0:f30e2135b0db 52 /**
Yann 0:f30e2135b0db 53 * Opens a serial device for communication.
Yann 0:f30e2135b0db 54 *
Yann 0:f30e2135b0db 55 * @param devnum device number
Yann 0:f30e2135b0db 56 * @return handle to serial device if successful, NULL otherwise
Yann 0:f30e2135b0db 57 */
Yann 0:f30e2135b0db 58 sio_fd_t sio_open(u8_t devnum)
Yann 0:f30e2135b0db 59 {
Yann 0:f30e2135b0db 60 #if 0
Yann 0:f30e2135b0db 61 SerialBuf* pIf = SioMgr::getIf(devnum);
Yann 0:f30e2135b0db 62 if(pIf == NULL)
Yann 0:f30e2135b0db 63 return NULL;
Yann 0:f30e2135b0db 64
Yann 0:f30e2135b0db 65 //Got a SerialBuf* object
Yann 0:f30e2135b0db 66 //WARN: It HAS to be initialised (instanciated + attached to a Serial obj)
Yann 0:f30e2135b0db 67
Yann 0:f30e2135b0db 68 return (sio_fd_t) pIf;
Yann 0:f30e2135b0db 69 #endif
Yann 0:f30e2135b0db 70 return NULL;
Yann 0:f30e2135b0db 71 }
Yann 0:f30e2135b0db 72
Yann 0:f30e2135b0db 73 /**
Yann 0:f30e2135b0db 74 * Sends a single character to the serial device.
Yann 0:f30e2135b0db 75 *
Yann 0:f30e2135b0db 76 * @param c character to send
Yann 0:f30e2135b0db 77 * @param fd serial device handle
Yann 0:f30e2135b0db 78 *
Yann 0:f30e2135b0db 79 * @note This function will block until the character can be sent.
Yann 0:f30e2135b0db 80 */
Yann 0:f30e2135b0db 81 void sio_send(u8_t c, sio_fd_t fd)
Yann 0:f30e2135b0db 82 {
Yann 0:f30e2135b0db 83 SerialBuf* pIf = (SerialBuf*) fd;
Yann 0:f30e2135b0db 84 //while(!pIf->writeable());
Yann 0:f30e2135b0db 85 pIf->putc( (char) c );
Yann 0:f30e2135b0db 86 }
Yann 0:f30e2135b0db 87
Yann 0:f30e2135b0db 88 /**
Yann 0:f30e2135b0db 89 * Receives a single character from the serial device.
Yann 0:f30e2135b0db 90 *
Yann 0:f30e2135b0db 91 * @param fd serial device handle
Yann 0:f30e2135b0db 92 *
Yann 0:f30e2135b0db 93 * @note This function will block until a character is received.
Yann 0:f30e2135b0db 94 */
Yann 0:f30e2135b0db 95 u8_t sio_recv(sio_fd_t fd)
Yann 0:f30e2135b0db 96 {
Yann 0:f30e2135b0db 97 SerialBuf* pIf = (SerialBuf*) fd;
Yann 0:f30e2135b0db 98 pIf->setReadMode(false);
Yann 0:f30e2135b0db 99 while(!pIf->readable());
Yann 0:f30e2135b0db 100 return (u8_t) pIf->getc();
Yann 0:f30e2135b0db 101 }
Yann 0:f30e2135b0db 102
Yann 0:f30e2135b0db 103 /**
Yann 0:f30e2135b0db 104 * Reads from the serial device.
Yann 0:f30e2135b0db 105 *
Yann 0:f30e2135b0db 106 * @param fd serial device handle
Yann 0:f30e2135b0db 107 * @param data pointer to data buffer for receiving
Yann 0:f30e2135b0db 108 * @param len maximum length (in bytes) of data to receive
Yann 0:f30e2135b0db 109 * @return number of bytes actually received - may be 0 if aborted by sio_read_abort
Yann 0:f30e2135b0db 110 *
Yann 0:f30e2135b0db 111 * @note This function will block until data can be received. The blocking
Yann 0:f30e2135b0db 112 * can be cancelled by calling sio_read_abort().
Yann 0:f30e2135b0db 113 */
Yann 0:f30e2135b0db 114 static volatile bool m_abort = false;
Yann 0:f30e2135b0db 115 u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
Yann 0:f30e2135b0db 116 {
Yann 0:f30e2135b0db 117 u32_t recvd = 0; //bytes received
Yann 0:f30e2135b0db 118 SerialBuf* pIf = (SerialBuf*) fd;
Yann 0:f30e2135b0db 119 pIf->setReadMode(false);
Yann 0:f30e2135b0db 120 while(!m_abort && len)
Yann 0:f30e2135b0db 121 {
Yann 0:f30e2135b0db 122 while(!pIf->readable());
Yann 0:f30e2135b0db 123 *data = (u8_t) pIf->getc();
Yann 0:f30e2135b0db 124 data++;
Yann 0:f30e2135b0db 125 len--;
Yann 0:f30e2135b0db 126 recvd++;
Yann 0:f30e2135b0db 127 }
Yann 0:f30e2135b0db 128 m_abort = false;
Yann 0:f30e2135b0db 129 return recvd;
Yann 0:f30e2135b0db 130 }
Yann 0:f30e2135b0db 131
Yann 0:f30e2135b0db 132 /**
Yann 0:f30e2135b0db 133 * Tries to read from the serial device. Same as sio_read but returns
Yann 0:f30e2135b0db 134 * immediately if no data is available and never blocks.
Yann 0:f30e2135b0db 135 *
Yann 0:f30e2135b0db 136 * @param fd serial device handle
Yann 0:f30e2135b0db 137 * @param data pointer to data buffer for receiving
Yann 0:f30e2135b0db 138 * @param len maximum length (in bytes) of data to receive
Yann 0:f30e2135b0db 139 * @return number of bytes actually received
Yann 0:f30e2135b0db 140 */
Yann 0:f30e2135b0db 141 u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
Yann 0:f30e2135b0db 142 {
Yann 0:f30e2135b0db 143 u32_t recvd = 0; //bytes received
Yann 0:f30e2135b0db 144 SerialBuf* pIf = (SerialBuf*) fd;
Yann 0:f30e2135b0db 145 pIf->setReadMode(false);
Yann 0:f30e2135b0db 146 while(len)
Yann 0:f30e2135b0db 147 {
Yann 0:f30e2135b0db 148 /* if(!pIf->readable())
Yann 0:f30e2135b0db 149 {
Yann 0:f30e2135b0db 150 wait_ms(4);
Yann 0:f30e2135b0db 151 }*/
Yann 0:f30e2135b0db 152 if(!pIf->readable())
Yann 0:f30e2135b0db 153 {
Yann 0:f30e2135b0db 154 return recvd;
Yann 0:f30e2135b0db 155 }
Yann 0:f30e2135b0db 156 *data = (u8_t) pIf->getc();
Yann 0:f30e2135b0db 157 data++;
Yann 0:f30e2135b0db 158 len--;
Yann 0:f30e2135b0db 159 recvd++;
Yann 0:f30e2135b0db 160 }
Yann 0:f30e2135b0db 161 return recvd;
Yann 0:f30e2135b0db 162 }
Yann 0:f30e2135b0db 163
Yann 0:f30e2135b0db 164 /**
Yann 0:f30e2135b0db 165 * Writes to the serial device.
Yann 0:f30e2135b0db 166 *
Yann 0:f30e2135b0db 167 * @param fd serial device handle
Yann 0:f30e2135b0db 168 * @param data pointer to data to send
Yann 0:f30e2135b0db 169 * @param len length (in bytes) of data to send
Yann 0:f30e2135b0db 170 * @return number of bytes actually sent
Yann 0:f30e2135b0db 171 *
Yann 0:f30e2135b0db 172 * @note This function will block until all data can be sent.
Yann 0:f30e2135b0db 173 */
Yann 0:f30e2135b0db 174 u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
Yann 0:f30e2135b0db 175 {
Yann 0:f30e2135b0db 176 u32_t sent = 0; //bytes sent
Yann 0:f30e2135b0db 177 SerialBuf* pIf = (SerialBuf*) fd;
Yann 0:f30e2135b0db 178 while(len)
Yann 0:f30e2135b0db 179 {
Yann 0:f30e2135b0db 180 while(!pIf->writeable());
Yann 0:f30e2135b0db 181 pIf->putc(*data);
Yann 0:f30e2135b0db 182 data++;
Yann 0:f30e2135b0db 183 len--;
Yann 0:f30e2135b0db 184 sent++;
Yann 0:f30e2135b0db 185 }
Yann 0:f30e2135b0db 186 return sent; //Well, this is bound to be len if no interrupt mechanism
Yann 0:f30e2135b0db 187 }
Yann 0:f30e2135b0db 188
Yann 0:f30e2135b0db 189 /**
Yann 0:f30e2135b0db 190 * Aborts a blocking sio_read() call.
Yann 0:f30e2135b0db 191 *
Yann 0:f30e2135b0db 192 * @param fd serial device handle
Yann 0:f30e2135b0db 193 */
Yann 0:f30e2135b0db 194 void sio_read_abort(sio_fd_t fd)
Yann 0:f30e2135b0db 195 {
Yann 0:f30e2135b0db 196 m_abort = true;
Yann 0:f30e2135b0db 197 }
Yann 0:f30e2135b0db 198
Yann 0:f30e2135b0db 199 //}
Yann 0:f30e2135b0db 200
Yann 0:f30e2135b0db 201 #endif
Yann 0:f30e2135b0db 202