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This library is stripped down version of NetServices library. HTTP server and client function is NOT supported.

drv/serial/lwip/sio.cpp@0:dcf3c92487ca, 2011-07-20 (annotated)

Committer:: idinor
Date:: Wed Jul 20 11:45:39 2011 +0000
Revision:: 0:dcf3c92487ca

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User	Revision	Line number	New contents of line
idinor	0:dcf3c92487ca	1
idinor	0:dcf3c92487ca	2	/*
idinor	0:dcf3c92487ca	3	Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
idinor	0:dcf3c92487ca	4
idinor	0:dcf3c92487ca	5	Permission is hereby granted, free of charge, to any person obtaining a copy
idinor	0:dcf3c92487ca	6	of this software and associated documentation files (the "Software"), to deal
idinor	0:dcf3c92487ca	7	in the Software without restriction, including without limitation the rights
idinor	0:dcf3c92487ca	8	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
idinor	0:dcf3c92487ca	9	copies of the Software, and to permit persons to whom the Software is
idinor	0:dcf3c92487ca	10	furnished to do so, subject to the following conditions:
idinor	0:dcf3c92487ca	11
idinor	0:dcf3c92487ca	12	The above copyright notice and this permission notice shall be included in
idinor	0:dcf3c92487ca	13	all copies or substantial portions of the Software.
idinor	0:dcf3c92487ca	14
idinor	0:dcf3c92487ca	15	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
idinor	0:dcf3c92487ca	16	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
idinor	0:dcf3c92487ca	17	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
idinor	0:dcf3c92487ca	18	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
idinor	0:dcf3c92487ca	19	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
idinor	0:dcf3c92487ca	20	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
idinor	0:dcf3c92487ca	21	THE SOFTWARE.
idinor	0:dcf3c92487ca	22	*/
idinor	0:dcf3c92487ca	23
idinor	0:dcf3c92487ca	24	/*
idinor	0:dcf3c92487ca	25
idinor	0:dcf3c92487ca	26	This is a wrapper around Serial if for lwIP (acts as a serial driver)
idinor	0:dcf3c92487ca	27
idinor	0:dcf3c92487ca	28	See sio.h for functions to be implemented
idinor	0:dcf3c92487ca	29
idinor	0:dcf3c92487ca	30	sio_fd_t is a void* defined type, we use it as a SerialBuf ptr
idinor	0:dcf3c92487ca	31
idinor	0:dcf3c92487ca	32
idinor	0:dcf3c92487ca	33
idinor	0:dcf3c92487ca	34	*/
idinor	0:dcf3c92487ca	35
idinor	0:dcf3c92487ca	36
idinor	0:dcf3c92487ca	37	#include "netCfg.h"
idinor	0:dcf3c92487ca	38	#if NET_PPP
idinor	0:dcf3c92487ca	39
idinor	0:dcf3c92487ca	40	//#define MAX_SERIAL_PORTS 8
idinor	0:dcf3c92487ca	41
idinor	0:dcf3c92487ca	42	#include "lwip/sio.h"
idinor	0:dcf3c92487ca	43	#include "mbed.h"
idinor	0:dcf3c92487ca	44	//#include "sioMgr.h"
idinor	0:dcf3c92487ca	45	#include "drv/serial/buf/SerialBuf.h"
idinor	0:dcf3c92487ca	46
idinor	0:dcf3c92487ca	47	//#define __DEBUG
idinor	0:dcf3c92487ca	48	#include "dbg/dbg.h"
idinor	0:dcf3c92487ca	49
idinor	0:dcf3c92487ca	50	//extern "C" {
idinor	0:dcf3c92487ca	51
idinor	0:dcf3c92487ca	52	/**
idinor	0:dcf3c92487ca	53	* Opens a serial device for communication.
idinor	0:dcf3c92487ca	54	*
idinor	0:dcf3c92487ca	55	* @param devnum device number
idinor	0:dcf3c92487ca	56	* @return handle to serial device if successful, NULL otherwise
idinor	0:dcf3c92487ca	57	*/
idinor	0:dcf3c92487ca	58	sio_fd_t sio_open(u8_t devnum)
idinor	0:dcf3c92487ca	59	{
idinor	0:dcf3c92487ca	60	#if 0
idinor	0:dcf3c92487ca	61	SerialBuf* pIf = SioMgr::getIf(devnum);
idinor	0:dcf3c92487ca	62	if(pIf == NULL)
idinor	0:dcf3c92487ca	63	return NULL;
idinor	0:dcf3c92487ca	64
idinor	0:dcf3c92487ca	65	//Got a SerialBuf* object
idinor	0:dcf3c92487ca	66	//WARN: It HAS to be initialised (instanciated + attached to a Serial obj)
idinor	0:dcf3c92487ca	67
idinor	0:dcf3c92487ca	68	return (sio_fd_t) pIf;
idinor	0:dcf3c92487ca	69	#endif
idinor	0:dcf3c92487ca	70	return NULL;
idinor	0:dcf3c92487ca	71	}
idinor	0:dcf3c92487ca	72
idinor	0:dcf3c92487ca	73	/**
idinor	0:dcf3c92487ca	74	* Sends a single character to the serial device.
idinor	0:dcf3c92487ca	75	*
idinor	0:dcf3c92487ca	76	* @param c character to send
idinor	0:dcf3c92487ca	77	* @param fd serial device handle
idinor	0:dcf3c92487ca	78	*
idinor	0:dcf3c92487ca	79	* @note This function will block until the character can be sent.
idinor	0:dcf3c92487ca	80	*/
idinor	0:dcf3c92487ca	81	void sio_send(u8_t c, sio_fd_t fd)
idinor	0:dcf3c92487ca	82	{
idinor	0:dcf3c92487ca	83	SerialBuf* pIf = (SerialBuf*) fd;
idinor	0:dcf3c92487ca	84	//while(!pIf->writeable());
idinor	0:dcf3c92487ca	85	pIf->putc( (char) c );
idinor	0:dcf3c92487ca	86	}
idinor	0:dcf3c92487ca	87
idinor	0:dcf3c92487ca	88	/**
idinor	0:dcf3c92487ca	89	* Receives a single character from the serial device.
idinor	0:dcf3c92487ca	90	*
idinor	0:dcf3c92487ca	91	* @param fd serial device handle
idinor	0:dcf3c92487ca	92	*
idinor	0:dcf3c92487ca	93	* @note This function will block until a character is received.
idinor	0:dcf3c92487ca	94	*/
idinor	0:dcf3c92487ca	95	u8_t sio_recv(sio_fd_t fd)
idinor	0:dcf3c92487ca	96	{
idinor	0:dcf3c92487ca	97	SerialBuf* pIf = (SerialBuf*) fd;
idinor	0:dcf3c92487ca	98	pIf->setReadMode(false);
idinor	0:dcf3c92487ca	99	while(!pIf->readable());
idinor	0:dcf3c92487ca	100	return (u8_t) pIf->getc();
idinor	0:dcf3c92487ca	101	}
idinor	0:dcf3c92487ca	102
idinor	0:dcf3c92487ca	103	/**
idinor	0:dcf3c92487ca	104	* Reads from the serial device.
idinor	0:dcf3c92487ca	105	*
idinor	0:dcf3c92487ca	106	* @param fd serial device handle
idinor	0:dcf3c92487ca	107	* @param data pointer to data buffer for receiving
idinor	0:dcf3c92487ca	108	* @param len maximum length (in bytes) of data to receive
idinor	0:dcf3c92487ca	109	* @return number of bytes actually received - may be 0 if aborted by sio_read_abort
idinor	0:dcf3c92487ca	110	*
idinor	0:dcf3c92487ca	111	* @note This function will block until data can be received. The blocking
idinor	0:dcf3c92487ca	112	* can be cancelled by calling sio_read_abort().
idinor	0:dcf3c92487ca	113	*/
idinor	0:dcf3c92487ca	114	static volatile bool m_abort = false;
idinor	0:dcf3c92487ca	115	u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
idinor	0:dcf3c92487ca	116	{
idinor	0:dcf3c92487ca	117	u32_t recvd = 0; //bytes received
idinor	0:dcf3c92487ca	118	SerialBuf* pIf = (SerialBuf*) fd;
idinor	0:dcf3c92487ca	119	pIf->setReadMode(false);
idinor	0:dcf3c92487ca	120	while(!m_abort && len)
idinor	0:dcf3c92487ca	121	{
idinor	0:dcf3c92487ca	122	while(!pIf->readable());
idinor	0:dcf3c92487ca	123	*data = (u8_t) pIf->getc();
idinor	0:dcf3c92487ca	124	data++;
idinor	0:dcf3c92487ca	125	len--;
idinor	0:dcf3c92487ca	126	recvd++;
idinor	0:dcf3c92487ca	127	}
idinor	0:dcf3c92487ca	128	m_abort = false;
idinor	0:dcf3c92487ca	129	return recvd;
idinor	0:dcf3c92487ca	130	}
idinor	0:dcf3c92487ca	131
idinor	0:dcf3c92487ca	132	/**
idinor	0:dcf3c92487ca	133	* Tries to read from the serial device. Same as sio_read but returns
idinor	0:dcf3c92487ca	134	* immediately if no data is available and never blocks.
idinor	0:dcf3c92487ca	135	*
idinor	0:dcf3c92487ca	136	* @param fd serial device handle
idinor	0:dcf3c92487ca	137	* @param data pointer to data buffer for receiving
idinor	0:dcf3c92487ca	138	* @param len maximum length (in bytes) of data to receive
idinor	0:dcf3c92487ca	139	* @return number of bytes actually received
idinor	0:dcf3c92487ca	140	*/
idinor	0:dcf3c92487ca	141	u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
idinor	0:dcf3c92487ca	142	{
idinor	0:dcf3c92487ca	143	u32_t recvd = 0; //bytes received
idinor	0:dcf3c92487ca	144	SerialBuf* pIf = (SerialBuf*) fd;
idinor	0:dcf3c92487ca	145	pIf->setReadMode(false);
idinor	0:dcf3c92487ca	146	while(len)
idinor	0:dcf3c92487ca	147	{
idinor	0:dcf3c92487ca	148	/* if(!pIf->readable())
idinor	0:dcf3c92487ca	149	{
idinor	0:dcf3c92487ca	150	wait_ms(4);
idinor	0:dcf3c92487ca	151	}*/
idinor	0:dcf3c92487ca	152	if(!pIf->readable())
idinor	0:dcf3c92487ca	153	{
idinor	0:dcf3c92487ca	154	return recvd;
idinor	0:dcf3c92487ca	155	}
idinor	0:dcf3c92487ca	156	*data = (u8_t) pIf->getc();
idinor	0:dcf3c92487ca	157	data++;
idinor	0:dcf3c92487ca	158	len--;
idinor	0:dcf3c92487ca	159	recvd++;
idinor	0:dcf3c92487ca	160	}
idinor	0:dcf3c92487ca	161	return recvd;
idinor	0:dcf3c92487ca	162	}
idinor	0:dcf3c92487ca	163
idinor	0:dcf3c92487ca	164	/**
idinor	0:dcf3c92487ca	165	* Writes to the serial device.
idinor	0:dcf3c92487ca	166	*
idinor	0:dcf3c92487ca	167	* @param fd serial device handle
idinor	0:dcf3c92487ca	168	* @param data pointer to data to send
idinor	0:dcf3c92487ca	169	* @param len length (in bytes) of data to send
idinor	0:dcf3c92487ca	170	* @return number of bytes actually sent
idinor	0:dcf3c92487ca	171	*
idinor	0:dcf3c92487ca	172	* @note This function will block until all data can be sent.
idinor	0:dcf3c92487ca	173	*/
idinor	0:dcf3c92487ca	174	u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
idinor	0:dcf3c92487ca	175	{
idinor	0:dcf3c92487ca	176	u32_t sent = 0; //bytes sent
idinor	0:dcf3c92487ca	177	SerialBuf* pIf = (SerialBuf*) fd;
idinor	0:dcf3c92487ca	178	while(len)
idinor	0:dcf3c92487ca	179	{
idinor	0:dcf3c92487ca	180	while(!pIf->writeable());
idinor	0:dcf3c92487ca	181	pIf->putc(*data);
idinor	0:dcf3c92487ca	182	data++;
idinor	0:dcf3c92487ca	183	len--;
idinor	0:dcf3c92487ca	184	sent++;
idinor	0:dcf3c92487ca	185	}
idinor	0:dcf3c92487ca	186	return sent; //Well, this is bound to be len if no interrupt mechanism
idinor	0:dcf3c92487ca	187	}
idinor	0:dcf3c92487ca	188
idinor	0:dcf3c92487ca	189	/**
idinor	0:dcf3c92487ca	190	* Aborts a blocking sio_read() call.
idinor	0:dcf3c92487ca	191	*
idinor	0:dcf3c92487ca	192	* @param fd serial device handle
idinor	0:dcf3c92487ca	193	*/
idinor	0:dcf3c92487ca	194	void sio_read_abort(sio_fd_t fd)
idinor	0:dcf3c92487ca	195	{
idinor	0:dcf3c92487ca	196	m_abort = true;
idinor	0:dcf3c92487ca	197	}
idinor	0:dcf3c92487ca	198
idinor	0:dcf3c92487ca	199	//}
idinor	0:dcf3c92487ca	200
idinor	0:dcf3c92487ca	201	#endif
idinor	0:dcf3c92487ca	202

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Type:	Library
Created:	20 Jul 2011
Imports:	35
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	1

drv/serial/lwip/sio.cpp@0:dcf3c92487ca, 2011-07-20 (annotated)

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