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/*
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Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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/*
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This is a wrapper around Serial if for lwIP (acts as a serial driver)
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See sio.h for functions to be implemented
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sio_fd_t is a void* defined type, we use it as a SerialBuf ptr
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*/
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#include "netCfg.h"
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#if NET_PPP
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//#define MAX_SERIAL_PORTS 8
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#include "lwip/sio.h"
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#include "mbed.h"
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//#include "sioMgr.h"
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#include "drv/serial/buf/SerialBuf.h"
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//#define __DEBUG
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#include "dbg/dbg.h"
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//extern "C" {
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/**
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* Opens a serial device for communication.
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*
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* @param devnum device number
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* @return handle to serial device if successful, NULL otherwise
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*/
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sio_fd_t sio_open(u8_t devnum)
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{
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#if 0
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SerialBuf* pIf = SioMgr::getIf(devnum);
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if(pIf == NULL)
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return NULL;
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//Got a SerialBuf* object
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//WARN: It HAS to be initialised (instanciated + attached to a Serial obj)
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return (sio_fd_t) pIf;
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#endif
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return NULL;
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}
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/**
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* Sends a single character to the serial device.
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*
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* @param c character to send
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* @param fd serial device handle
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*
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* @note This function will block until the character can be sent.
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*/
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void sio_send(u8_t c, sio_fd_t fd)
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{
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SerialBuf* pIf = (SerialBuf*) fd;
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//while(!pIf->writeable());
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pIf->putc( (char) c );
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}
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/**
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* Receives a single character from the serial device.
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*
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* @param fd serial device handle
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*
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* @note This function will block until a character is received.
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*/
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u8_t sio_recv(sio_fd_t fd)
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{
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SerialBuf* pIf = (SerialBuf*) fd;
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pIf->setReadMode(false);
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while(!pIf->readable());
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return (u8_t) pIf->getc();
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}
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/**
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* Reads from the serial device.
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*
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* @param fd serial device handle
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* @param data pointer to data buffer for receiving
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* @param len maximum length (in bytes) of data to receive
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* @return number of bytes actually received - may be 0 if aborted by sio_read_abort
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*
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* @note This function will block until data can be received. The blocking
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* can be cancelled by calling sio_read_abort().
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*/
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static volatile bool m_abort = false;
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u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
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{
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u32_t recvd = 0; //bytes received
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SerialBuf* pIf = (SerialBuf*) fd;
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pIf->setReadMode(false);
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while(!m_abort && len)
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{
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while(!pIf->readable());
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*data = (u8_t) pIf->getc();
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data++;
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len--;
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recvd++;
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}
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m_abort = false;
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return recvd;
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}
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/**
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* Tries to read from the serial device. Same as sio_read but returns
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* immediately if no data is available and never blocks.
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*
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* @param fd serial device handle
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* @param data pointer to data buffer for receiving
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* @param len maximum length (in bytes) of data to receive
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* @return number of bytes actually received
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*/
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u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
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{
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u32_t recvd = 0; //bytes received
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SerialBuf* pIf = (SerialBuf*) fd;
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pIf->setReadMode(false);
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while(len)
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{
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/* if(!pIf->readable())
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{
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wait_ms(4);
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}*/
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if(!pIf->readable())
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{
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return recvd;
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}
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*data = (u8_t) pIf->getc();
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data++;
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len--;
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recvd++;
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}
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return recvd;
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}
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/**
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* Writes to the serial device.
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*
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* @param fd serial device handle
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* @param data pointer to data to send
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* @param len length (in bytes) of data to send
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* @return number of bytes actually sent
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*
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* @note This function will block until all data can be sent.
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*/
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u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
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{
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u32_t sent = 0; //bytes sent
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SerialBuf* pIf = (SerialBuf*) fd;
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while(len)
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{
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while(!pIf->writeable());
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pIf->putc(*data);
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data++;
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len--;
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sent++;
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}
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return sent; //Well, this is bound to be len if no interrupt mechanism
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}
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/**
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* Aborts a blocking sio_read() call.
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*
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* @param fd serial device handle
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*/
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void sio_read_abort(sio_fd_t fd)
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{
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m_abort = true;
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}
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//}
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#endif
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Daniel Peter