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NetServicesProxy/drv/serial/lwip/sio.cpp@0:1619a6b826d7, 2011-11-21 (annotated)

Committer:: Hello1024
Date:: Mon Nov 21 18:25:34 2011 +0000
Revision:: 0:1619a6b826d7

Who changed what in which revision?

User	Revision	Line number	New contents of line
Hello1024	0:1619a6b826d7	1
Hello1024	0:1619a6b826d7	2	/*
Hello1024	0:1619a6b826d7	3	Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
Hello1024	0:1619a6b826d7	4
Hello1024	0:1619a6b826d7	5	Permission is hereby granted, free of charge, to any person obtaining a copy
Hello1024	0:1619a6b826d7	6	of this software and associated documentation files (the "Software"), to deal
Hello1024	0:1619a6b826d7	7	in the Software without restriction, including without limitation the rights
Hello1024	0:1619a6b826d7	8	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Hello1024	0:1619a6b826d7	9	copies of the Software, and to permit persons to whom the Software is
Hello1024	0:1619a6b826d7	10	furnished to do so, subject to the following conditions:
Hello1024	0:1619a6b826d7	11
Hello1024	0:1619a6b826d7	12	The above copyright notice and this permission notice shall be included in
Hello1024	0:1619a6b826d7	13	all copies or substantial portions of the Software.
Hello1024	0:1619a6b826d7	14
Hello1024	0:1619a6b826d7	15	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Hello1024	0:1619a6b826d7	16	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Hello1024	0:1619a6b826d7	17	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Hello1024	0:1619a6b826d7	18	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Hello1024	0:1619a6b826d7	19	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Hello1024	0:1619a6b826d7	20	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Hello1024	0:1619a6b826d7	21	THE SOFTWARE.
Hello1024	0:1619a6b826d7	22	*/
Hello1024	0:1619a6b826d7	23
Hello1024	0:1619a6b826d7	24	/*
Hello1024	0:1619a6b826d7	25
Hello1024	0:1619a6b826d7	26	This is a wrapper around Serial if for lwIP (acts as a serial driver)
Hello1024	0:1619a6b826d7	27
Hello1024	0:1619a6b826d7	28	See sio.h for functions to be implemented
Hello1024	0:1619a6b826d7	29
Hello1024	0:1619a6b826d7	30	sio_fd_t is a void* defined type, we use it as a SerialBuf ptr
Hello1024	0:1619a6b826d7	31
Hello1024	0:1619a6b826d7	32
Hello1024	0:1619a6b826d7	33
Hello1024	0:1619a6b826d7	34	*/
Hello1024	0:1619a6b826d7	35
Hello1024	0:1619a6b826d7	36
Hello1024	0:1619a6b826d7	37	#include "netCfg.h"
Hello1024	0:1619a6b826d7	38	#if NET_PPP
Hello1024	0:1619a6b826d7	39
Hello1024	0:1619a6b826d7	40	//#define MAX_SERIAL_PORTS 8
Hello1024	0:1619a6b826d7	41
Hello1024	0:1619a6b826d7	42	#include "lwip/sio.h"
Hello1024	0:1619a6b826d7	43	#include "mbed.h"
Hello1024	0:1619a6b826d7	44	//#include "sioMgr.h"
Hello1024	0:1619a6b826d7	45	#include "drv/serial/buf/SerialBuf.h"
Hello1024	0:1619a6b826d7	46
Hello1024	0:1619a6b826d7	47	//#define __DEBUG
Hello1024	0:1619a6b826d7	48	#include "dbg/dbg.h"
Hello1024	0:1619a6b826d7	49
Hello1024	0:1619a6b826d7	50	//extern "C" {
Hello1024	0:1619a6b826d7	51
Hello1024	0:1619a6b826d7	52	/**
Hello1024	0:1619a6b826d7	53	* Opens a serial device for communication.
Hello1024	0:1619a6b826d7	54	*
Hello1024	0:1619a6b826d7	55	* @param devnum device number
Hello1024	0:1619a6b826d7	56	* @return handle to serial device if successful, NULL otherwise
Hello1024	0:1619a6b826d7	57	*/
Hello1024	0:1619a6b826d7	58	sio_fd_t sio_open(u8_t devnum)
Hello1024	0:1619a6b826d7	59	{
Hello1024	0:1619a6b826d7	60	#if 0
Hello1024	0:1619a6b826d7	61	SerialBuf* pIf = SioMgr::getIf(devnum);
Hello1024	0:1619a6b826d7	62	if(pIf == NULL)
Hello1024	0:1619a6b826d7	63	return NULL;
Hello1024	0:1619a6b826d7	64
Hello1024	0:1619a6b826d7	65	//Got a SerialBuf* object
Hello1024	0:1619a6b826d7	66	//WARN: It HAS to be initialised (instanciated + attached to a Serial obj)
Hello1024	0:1619a6b826d7	67
Hello1024	0:1619a6b826d7	68	return (sio_fd_t) pIf;
Hello1024	0:1619a6b826d7	69	#endif
Hello1024	0:1619a6b826d7	70	return NULL;
Hello1024	0:1619a6b826d7	71	}
Hello1024	0:1619a6b826d7	72
Hello1024	0:1619a6b826d7	73	/**
Hello1024	0:1619a6b826d7	74	* Sends a single character to the serial device.
Hello1024	0:1619a6b826d7	75	*
Hello1024	0:1619a6b826d7	76	* @param c character to send
Hello1024	0:1619a6b826d7	77	* @param fd serial device handle
Hello1024	0:1619a6b826d7	78	*
Hello1024	0:1619a6b826d7	79	* @note This function will block until the character can be sent.
Hello1024	0:1619a6b826d7	80	*/
Hello1024	0:1619a6b826d7	81	void sio_send(u8_t c, sio_fd_t fd)
Hello1024	0:1619a6b826d7	82	{
Hello1024	0:1619a6b826d7	83	SerialBuf* pIf = (SerialBuf*) fd;
Hello1024	0:1619a6b826d7	84	//while(!pIf->writeable());
Hello1024	0:1619a6b826d7	85	pIf->putc( (char) c );
Hello1024	0:1619a6b826d7	86	}
Hello1024	0:1619a6b826d7	87
Hello1024	0:1619a6b826d7	88	/**
Hello1024	0:1619a6b826d7	89	* Receives a single character from the serial device.
Hello1024	0:1619a6b826d7	90	*
Hello1024	0:1619a6b826d7	91	* @param fd serial device handle
Hello1024	0:1619a6b826d7	92	*
Hello1024	0:1619a6b826d7	93	* @note This function will block until a character is received.
Hello1024	0:1619a6b826d7	94	*/
Hello1024	0:1619a6b826d7	95	u8_t sio_recv(sio_fd_t fd)
Hello1024	0:1619a6b826d7	96	{
Hello1024	0:1619a6b826d7	97	SerialBuf* pIf = (SerialBuf*) fd;
Hello1024	0:1619a6b826d7	98	pIf->setReadMode(false);
Hello1024	0:1619a6b826d7	99	while(!pIf->readable());
Hello1024	0:1619a6b826d7	100	return (u8_t) pIf->getc();
Hello1024	0:1619a6b826d7	101	}
Hello1024	0:1619a6b826d7	102
Hello1024	0:1619a6b826d7	103	/**
Hello1024	0:1619a6b826d7	104	* Reads from the serial device.
Hello1024	0:1619a6b826d7	105	*
Hello1024	0:1619a6b826d7	106	* @param fd serial device handle
Hello1024	0:1619a6b826d7	107	* @param data pointer to data buffer for receiving
Hello1024	0:1619a6b826d7	108	* @param len maximum length (in bytes) of data to receive
Hello1024	0:1619a6b826d7	109	* @return number of bytes actually received - may be 0 if aborted by sio_read_abort
Hello1024	0:1619a6b826d7	110	*
Hello1024	0:1619a6b826d7	111	* @note This function will block until data can be received. The blocking
Hello1024	0:1619a6b826d7	112	* can be cancelled by calling sio_read_abort().
Hello1024	0:1619a6b826d7	113	*/
Hello1024	0:1619a6b826d7	114	static volatile bool m_abort = false;
Hello1024	0:1619a6b826d7	115	u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
Hello1024	0:1619a6b826d7	116	{
Hello1024	0:1619a6b826d7	117	u32_t recvd = 0; //bytes received
Hello1024	0:1619a6b826d7	118	SerialBuf* pIf = (SerialBuf*) fd;
Hello1024	0:1619a6b826d7	119	pIf->setReadMode(false);
Hello1024	0:1619a6b826d7	120	while(!m_abort && len)
Hello1024	0:1619a6b826d7	121	{
Hello1024	0:1619a6b826d7	122	while(!pIf->readable());
Hello1024	0:1619a6b826d7	123	*data = (u8_t) pIf->getc();
Hello1024	0:1619a6b826d7	124	data++;
Hello1024	0:1619a6b826d7	125	len--;
Hello1024	0:1619a6b826d7	126	recvd++;
Hello1024	0:1619a6b826d7	127	}
Hello1024	0:1619a6b826d7	128	m_abort = false;
Hello1024	0:1619a6b826d7	129	return recvd;
Hello1024	0:1619a6b826d7	130	}
Hello1024	0:1619a6b826d7	131
Hello1024	0:1619a6b826d7	132	/**
Hello1024	0:1619a6b826d7	133	* Tries to read from the serial device. Same as sio_read but returns
Hello1024	0:1619a6b826d7	134	* immediately if no data is available and never blocks.
Hello1024	0:1619a6b826d7	135	*
Hello1024	0:1619a6b826d7	136	* @param fd serial device handle
Hello1024	0:1619a6b826d7	137	* @param data pointer to data buffer for receiving
Hello1024	0:1619a6b826d7	138	* @param len maximum length (in bytes) of data to receive
Hello1024	0:1619a6b826d7	139	* @return number of bytes actually received
Hello1024	0:1619a6b826d7	140	*/
Hello1024	0:1619a6b826d7	141	u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
Hello1024	0:1619a6b826d7	142	{
Hello1024	0:1619a6b826d7	143	u32_t recvd = 0; //bytes received
Hello1024	0:1619a6b826d7	144	SerialBuf* pIf = (SerialBuf*) fd;
Hello1024	0:1619a6b826d7	145	pIf->setReadMode(false);
Hello1024	0:1619a6b826d7	146	while(len)
Hello1024	0:1619a6b826d7	147	{
Hello1024	0:1619a6b826d7	148	/* if(!pIf->readable())
Hello1024	0:1619a6b826d7	149	{
Hello1024	0:1619a6b826d7	150	wait_ms(4);
Hello1024	0:1619a6b826d7	151	}*/
Hello1024	0:1619a6b826d7	152	if(!pIf->readable())
Hello1024	0:1619a6b826d7	153	{
Hello1024	0:1619a6b826d7	154	return recvd;
Hello1024	0:1619a6b826d7	155	}
Hello1024	0:1619a6b826d7	156	*data = (u8_t) pIf->getc();
Hello1024	0:1619a6b826d7	157	data++;
Hello1024	0:1619a6b826d7	158	len--;
Hello1024	0:1619a6b826d7	159	recvd++;
Hello1024	0:1619a6b826d7	160	}
Hello1024	0:1619a6b826d7	161	return recvd;
Hello1024	0:1619a6b826d7	162	}
Hello1024	0:1619a6b826d7	163
Hello1024	0:1619a6b826d7	164	/**
Hello1024	0:1619a6b826d7	165	* Writes to the serial device.
Hello1024	0:1619a6b826d7	166	*
Hello1024	0:1619a6b826d7	167	* @param fd serial device handle
Hello1024	0:1619a6b826d7	168	* @param data pointer to data to send
Hello1024	0:1619a6b826d7	169	* @param len length (in bytes) of data to send
Hello1024	0:1619a6b826d7	170	* @return number of bytes actually sent
Hello1024	0:1619a6b826d7	171	*
Hello1024	0:1619a6b826d7	172	* @note This function will block until all data can be sent.
Hello1024	0:1619a6b826d7	173	*/
Hello1024	0:1619a6b826d7	174	u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
Hello1024	0:1619a6b826d7	175	{
Hello1024	0:1619a6b826d7	176	u32_t sent = 0; //bytes sent
Hello1024	0:1619a6b826d7	177	SerialBuf* pIf = (SerialBuf*) fd;
Hello1024	0:1619a6b826d7	178	while(len)
Hello1024	0:1619a6b826d7	179	{
Hello1024	0:1619a6b826d7	180	while(!pIf->writeable());
Hello1024	0:1619a6b826d7	181	pIf->putc(*data);
Hello1024	0:1619a6b826d7	182	data++;
Hello1024	0:1619a6b826d7	183	len--;
Hello1024	0:1619a6b826d7	184	sent++;
Hello1024	0:1619a6b826d7	185	}
Hello1024	0:1619a6b826d7	186	return sent; //Well, this is bound to be len if no interrupt mechanism
Hello1024	0:1619a6b826d7	187	}
Hello1024	0:1619a6b826d7	188
Hello1024	0:1619a6b826d7	189	/**
Hello1024	0:1619a6b826d7	190	* Aborts a blocking sio_read() call.
Hello1024	0:1619a6b826d7	191	*
Hello1024	0:1619a6b826d7	192	* @param fd serial device handle
Hello1024	0:1619a6b826d7	193	*/
Hello1024	0:1619a6b826d7	194	void sio_read_abort(sio_fd_t fd)
Hello1024	0:1619a6b826d7	195	{
Hello1024	0:1619a6b826d7	196	m_abort = true;
Hello1024	0:1619a6b826d7	197	}
Hello1024	0:1619a6b826d7	198
Hello1024	0:1619a6b826d7	199	//}
Hello1024	0:1619a6b826d7	200
Hello1024	0:1619a6b826d7	201	#endif
Hello1024	0:1619a6b826d7	202

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	21 Nov 2011
Imports:	10
Forks:	1
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

NetServicesProxy/drv/serial/lwip/sio.cpp@0:1619a6b826d7, 2011-11-21 (annotated)

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