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drv/serial/lwip/sio.cpp@0:ac21159e27f4, 2010-07-02 (annotated)

Committer:: darran
Date:: Fri Jul 02 17:21:58 2010 +0000
Revision:: 0:ac21159e27f4

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User	Revision	Line number	New contents of line
darran	0:ac21159e27f4	1
darran	0:ac21159e27f4	2	/*
darran	0:ac21159e27f4	3	Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
darran	0:ac21159e27f4	4
darran	0:ac21159e27f4	5	Permission is hereby granted, free of charge, to any person obtaining a copy
darran	0:ac21159e27f4	6	of this software and associated documentation files (the "Software"), to deal
darran	0:ac21159e27f4	7	in the Software without restriction, including without limitation the rights
darran	0:ac21159e27f4	8	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
darran	0:ac21159e27f4	9	copies of the Software, and to permit persons to whom the Software is
darran	0:ac21159e27f4	10	furnished to do so, subject to the following conditions:
darran	0:ac21159e27f4	11
darran	0:ac21159e27f4	12	The above copyright notice and this permission notice shall be included in
darran	0:ac21159e27f4	13	all copies or substantial portions of the Software.
darran	0:ac21159e27f4	14
darran	0:ac21159e27f4	15	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
darran	0:ac21159e27f4	16	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
darran	0:ac21159e27f4	17	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
darran	0:ac21159e27f4	18	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
darran	0:ac21159e27f4	19	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
darran	0:ac21159e27f4	20	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
darran	0:ac21159e27f4	21	THE SOFTWARE.
darran	0:ac21159e27f4	22	*/
darran	0:ac21159e27f4	23
darran	0:ac21159e27f4	24	/*
darran	0:ac21159e27f4	25
darran	0:ac21159e27f4	26	This is a wrapper around Serial if for lwIP (acts as a serial driver)
darran	0:ac21159e27f4	27
darran	0:ac21159e27f4	28	See sio.h for functions to be implemented
darran	0:ac21159e27f4	29
darran	0:ac21159e27f4	30	sio_fd_t is a void* defined type, we use it as a SerialBuf ptr
darran	0:ac21159e27f4	31
darran	0:ac21159e27f4	32
darran	0:ac21159e27f4	33
darran	0:ac21159e27f4	34	*/
darran	0:ac21159e27f4	35
darran	0:ac21159e27f4	36
darran	0:ac21159e27f4	37	#include "netCfg.h"
darran	0:ac21159e27f4	38	#if NET_PPP
darran	0:ac21159e27f4	39
darran	0:ac21159e27f4	40
darran	0:ac21159e27f4	41	#define MAX_SERIAL_PORTS 8
darran	0:ac21159e27f4	42
darran	0:ac21159e27f4	43	#include "lwip/sio.h"
darran	0:ac21159e27f4	44	#include "mbed.h"
darran	0:ac21159e27f4	45	#include "sioMgr.h"
darran	0:ac21159e27f4	46
darran	0:ac21159e27f4	47	//extern "C" {
darran	0:ac21159e27f4	48
darran	0:ac21159e27f4	49	/**
darran	0:ac21159e27f4	50	* Opens a serial device for communication.
darran	0:ac21159e27f4	51	*
darran	0:ac21159e27f4	52	* @param devnum device number
darran	0:ac21159e27f4	53	* @return handle to serial device if successful, NULL otherwise
darran	0:ac21159e27f4	54	*/
darran	0:ac21159e27f4	55	sio_fd_t sio_open(u8_t devnum)
darran	0:ac21159e27f4	56	{
darran	0:ac21159e27f4	57	SerialBuf* pIf = SioMgr::getIf(devnum);
darran	0:ac21159e27f4	58	if(pIf == NULL)
darran	0:ac21159e27f4	59	return NULL;
darran	0:ac21159e27f4	60
darran	0:ac21159e27f4	61	//Got a SerialBuf* object
darran	0:ac21159e27f4	62	//WARN: It HAS to be initialised (instanciated + attached to a Serial obj)
darran	0:ac21159e27f4	63
darran	0:ac21159e27f4	64	return (sio_fd_t*) pIf;
darran	0:ac21159e27f4	65	}
darran	0:ac21159e27f4	66
darran	0:ac21159e27f4	67	/**
darran	0:ac21159e27f4	68	* Sends a single character to the serial device.
darran	0:ac21159e27f4	69	*
darran	0:ac21159e27f4	70	* @param c character to send
darran	0:ac21159e27f4	71	* @param fd serial device handle
darran	0:ac21159e27f4	72	*
darran	0:ac21159e27f4	73	* @note This function will block until the character can be sent.
darran	0:ac21159e27f4	74	*/
darran	0:ac21159e27f4	75	void sio_send(u8_t c, sio_fd_t fd)
darran	0:ac21159e27f4	76	{
darran	0:ac21159e27f4	77	SerialBuf* pIf = (SerialBuf*) fd;
darran	0:ac21159e27f4	78	//while(!pIf->writeable());
darran	0:ac21159e27f4	79	pIf->putc( (char) c );
darran	0:ac21159e27f4	80	}
darran	0:ac21159e27f4	81
darran	0:ac21159e27f4	82	/**
darran	0:ac21159e27f4	83	* Receives a single character from the serial device.
darran	0:ac21159e27f4	84	*
darran	0:ac21159e27f4	85	* @param fd serial device handle
darran	0:ac21159e27f4	86	*
darran	0:ac21159e27f4	87	* @note This function will block until a character is received.
darran	0:ac21159e27f4	88	*/
darran	0:ac21159e27f4	89	u8_t sio_recv(sio_fd_t fd)
darran	0:ac21159e27f4	90	{
darran	0:ac21159e27f4	91	SerialBuf* pIf = (SerialBuf*) fd;
darran	0:ac21159e27f4	92	pIf->setReadMode(false);
darran	0:ac21159e27f4	93	while(!pIf->readable());
darran	0:ac21159e27f4	94	return (u8_t) pIf->getc();
darran	0:ac21159e27f4	95	}
darran	0:ac21159e27f4	96
darran	0:ac21159e27f4	97	/**
darran	0:ac21159e27f4	98	* Reads from the serial device.
darran	0:ac21159e27f4	99	*
darran	0:ac21159e27f4	100	* @param fd serial device handle
darran	0:ac21159e27f4	101	* @param data pointer to data buffer for receiving
darran	0:ac21159e27f4	102	* @param len maximum length (in bytes) of data to receive
darran	0:ac21159e27f4	103	* @return number of bytes actually received - may be 0 if aborted by sio_read_abort
darran	0:ac21159e27f4	104	*
darran	0:ac21159e27f4	105	* @note This function will block until data can be received. The blocking
darran	0:ac21159e27f4	106	* can be cancelled by calling sio_read_abort().
darran	0:ac21159e27f4	107	*/
darran	0:ac21159e27f4	108	static volatile bool m_abort = false;
darran	0:ac21159e27f4	109	u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
darran	0:ac21159e27f4	110	{
darran	0:ac21159e27f4	111	u32_t recvd = 0; //bytes received
darran	0:ac21159e27f4	112	SerialBuf* pIf = (SerialBuf*) fd;
darran	0:ac21159e27f4	113	pIf->setReadMode(false);
darran	0:ac21159e27f4	114	while(!m_abort && len)
darran	0:ac21159e27f4	115	{
darran	0:ac21159e27f4	116	while(!pIf->readable());
darran	0:ac21159e27f4	117	*data = (u8_t) pIf->getc();
darran	0:ac21159e27f4	118	data++;
darran	0:ac21159e27f4	119	len--;
darran	0:ac21159e27f4	120	recvd++;
darran	0:ac21159e27f4	121	}
darran	0:ac21159e27f4	122	m_abort = false;
darran	0:ac21159e27f4	123	return recvd;
darran	0:ac21159e27f4	124	}
darran	0:ac21159e27f4	125
darran	0:ac21159e27f4	126	/**
darran	0:ac21159e27f4	127	* Tries to read from the serial device. Same as sio_read but returns
darran	0:ac21159e27f4	128	* immediately if no data is available and never blocks.
darran	0:ac21159e27f4	129	*
darran	0:ac21159e27f4	130	* @param fd serial device handle
darran	0:ac21159e27f4	131	* @param data pointer to data buffer for receiving
darran	0:ac21159e27f4	132	* @param len maximum length (in bytes) of data to receive
darran	0:ac21159e27f4	133	* @return number of bytes actually received
darran	0:ac21159e27f4	134	*/
darran	0:ac21159e27f4	135	u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
darran	0:ac21159e27f4	136	{
darran	0:ac21159e27f4	137	u32_t recvd = 0; //bytes received
darran	0:ac21159e27f4	138	SerialBuf* pIf = (SerialBuf*) fd;
darran	0:ac21159e27f4	139	pIf->setReadMode(false);
darran	0:ac21159e27f4	140	while(len)
darran	0:ac21159e27f4	141	{
darran	0:ac21159e27f4	142	/* if(!pIf->readable())
darran	0:ac21159e27f4	143	{
darran	0:ac21159e27f4	144	wait_ms(4);
darran	0:ac21159e27f4	145	}*/
darran	0:ac21159e27f4	146	if(!pIf->readable())
darran	0:ac21159e27f4	147	{
darran	0:ac21159e27f4	148	return recvd;
darran	0:ac21159e27f4	149	}
darran	0:ac21159e27f4	150	*data = (u8_t) pIf->getc();
darran	0:ac21159e27f4	151	data++;
darran	0:ac21159e27f4	152	len--;
darran	0:ac21159e27f4	153	recvd++;
darran	0:ac21159e27f4	154	}
darran	0:ac21159e27f4	155	return recvd;
darran	0:ac21159e27f4	156	}
darran	0:ac21159e27f4	157
darran	0:ac21159e27f4	158	/**
darran	0:ac21159e27f4	159	* Writes to the serial device.
darran	0:ac21159e27f4	160	*
darran	0:ac21159e27f4	161	* @param fd serial device handle
darran	0:ac21159e27f4	162	* @param data pointer to data to send
darran	0:ac21159e27f4	163	* @param len length (in bytes) of data to send
darran	0:ac21159e27f4	164	* @return number of bytes actually sent
darran	0:ac21159e27f4	165	*
darran	0:ac21159e27f4	166	* @note This function will block until all data can be sent.
darran	0:ac21159e27f4	167	*/
darran	0:ac21159e27f4	168	u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
darran	0:ac21159e27f4	169	{
darran	0:ac21159e27f4	170	u32_t sent = 0; //bytes sent
darran	0:ac21159e27f4	171	SerialBuf* pIf = (SerialBuf*) fd;
darran	0:ac21159e27f4	172	while(len)
darran	0:ac21159e27f4	173	{
darran	0:ac21159e27f4	174	//while(!pIf->writeable());
darran	0:ac21159e27f4	175	pIf->putc(*data);
darran	0:ac21159e27f4	176	data++;
darran	0:ac21159e27f4	177	len--;
darran	0:ac21159e27f4	178	sent++;
darran	0:ac21159e27f4	179	}
darran	0:ac21159e27f4	180	return sent; //Well, this is bound to be len if no interrupt mechanism
darran	0:ac21159e27f4	181	}
darran	0:ac21159e27f4	182
darran	0:ac21159e27f4	183	/**
darran	0:ac21159e27f4	184	* Aborts a blocking sio_read() call.
darran	0:ac21159e27f4	185	*
darran	0:ac21159e27f4	186	* @param fd serial device handle
darran	0:ac21159e27f4	187	*/
darran	0:ac21159e27f4	188	void sio_read_abort(sio_fd_t fd)
darran	0:ac21159e27f4	189	{
darran	0:ac21159e27f4	190	m_abort = true;
darran	0:ac21159e27f4	191	}
darran	0:ac21159e27f4	192
darran	0:ac21159e27f4	193	//}
darran	0:ac21159e27f4	194
darran	0:ac21159e27f4	195	#endif
darran	0:ac21159e27f4	196

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	02 Jul 2010
Imports:	2
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

drv/serial/lwip/sio.cpp@0:ac21159e27f4, 2010-07-02 (annotated)

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