Camera_LS_Y201 - MODIFIED BY FEVZI YAZGAN BOUDRATE AND IMAGESIZE…

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MODIFIED BY FEVZI YAZGAN BOUDRATE AND IMAGESIZE FUNCTION ADDED ALSO IT SENDS THE IMAGE AT ONE TIME TO THE MBED. SO IT IS FASTER TO SEND IMAGE AT A ONE TIME:)

Dependents: 10_Camera_LS_Y201_TestProgram

SerialBuffered.cpp@0:92b7ae8bc9f5, 2011-03-02 (annotated)

Committer:: fyazgan
Date:: Wed Mar 02 05:43:09 2011 +0000
Revision:: 0:92b7ae8bc9f5

Who changed what in which revision?

User	Revision	Line number	New contents of line
fyazgan	0:92b7ae8bc9f5	1	/**
fyazgan	0:92b7ae8bc9f5	2	* =============================================================================
fyazgan	0:92b7ae8bc9f5	3	* LS-Y201 device driver class (Version 0.0.1)
fyazgan	0:92b7ae8bc9f5	4	* Reference documents: LinkSprite JPEG Color Camera Serial UART Interface
fyazgan	0:92b7ae8bc9f5	5	* January 2010
fyazgan	0:92b7ae8bc9f5	6	* =============================================================================
fyazgan	0:92b7ae8bc9f5	7	* Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems)
fyazgan	0:92b7ae8bc9f5	8	*
fyazgan	0:92b7ae8bc9f5	9	* Permission is hereby granted, free of charge, to any person obtaining a copy
fyazgan	0:92b7ae8bc9f5	10	* of this software and associated documentation files (the "Software"), to deal
fyazgan	0:92b7ae8bc9f5	11	* in the Software without restriction, including without limitation the rights
fyazgan	0:92b7ae8bc9f5	12	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
fyazgan	0:92b7ae8bc9f5	13	* copies of the Software, and to permit persons to whom the Software is
fyazgan	0:92b7ae8bc9f5	14	* furnished to do so, subject to the following conditions:
fyazgan	0:92b7ae8bc9f5	15	*
fyazgan	0:92b7ae8bc9f5	16	* The above copyright notice and this permission notice shall be included in
fyazgan	0:92b7ae8bc9f5	17	* all copies or substantial portions of the Software.
fyazgan	0:92b7ae8bc9f5	18	*
fyazgan	0:92b7ae8bc9f5	19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
fyazgan	0:92b7ae8bc9f5	20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
fyazgan	0:92b7ae8bc9f5	21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
fyazgan	0:92b7ae8bc9f5	22	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
fyazgan	0:92b7ae8bc9f5	23	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
fyazgan	0:92b7ae8bc9f5	24	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
fyazgan	0:92b7ae8bc9f5	25	* THE SOFTWARE.
fyazgan	0:92b7ae8bc9f5	26	* =============================================================================
fyazgan	0:92b7ae8bc9f5	27	*/
fyazgan	0:92b7ae8bc9f5	28
fyazgan	0:92b7ae8bc9f5	29	#include "mbed.h"
fyazgan	0:92b7ae8bc9f5	30	#include "SerialBuffered.h"
fyazgan	0:92b7ae8bc9f5	31
fyazgan	0:92b7ae8bc9f5	32	/**
fyazgan	0:92b7ae8bc9f5	33	* Create a buffered serial class.
fyazgan	0:92b7ae8bc9f5	34	*
fyazgan	0:92b7ae8bc9f5	35	* @param tx A pin for transmit.
fyazgan	0:92b7ae8bc9f5	36	* @param rx A pin for receive.
fyazgan	0:92b7ae8bc9f5	37	*/
fyazgan	0:92b7ae8bc9f5	38	SerialBuffered::SerialBuffered(PinName tx, PinName rx) : Serial(tx, rx) {
fyazgan	0:92b7ae8bc9f5	39	indexContentStart = 0;
fyazgan	0:92b7ae8bc9f5	40	indexContentEnd = 0;
fyazgan	0:92b7ae8bc9f5	41	timeout = 1;
fyazgan	0:92b7ae8bc9f5	42	attach(this, &SerialBuffered::handleInterrupt);
fyazgan	0:92b7ae8bc9f5	43	}
fyazgan	0:92b7ae8bc9f5	44
fyazgan	0:92b7ae8bc9f5	45	/**
fyazgan	0:92b7ae8bc9f5	46	* Destroy.
fyazgan	0:92b7ae8bc9f5	47	*/
fyazgan	0:92b7ae8bc9f5	48	SerialBuffered::~SerialBuffered() {
fyazgan	0:92b7ae8bc9f5	49	}
fyazgan	0:92b7ae8bc9f5	50
fyazgan	0:92b7ae8bc9f5	51	/**
fyazgan	0:92b7ae8bc9f5	52	* Set timeout for getc().
fyazgan	0:92b7ae8bc9f5	53	*
fyazgan	0:92b7ae8bc9f5	54	* @param ms milliseconds. (-1:Disable timeout)
fyazgan	0:92b7ae8bc9f5	55	*/
fyazgan	0:92b7ae8bc9f5	56	void SerialBuffered::setTimeout(int ms) {
fyazgan	0:92b7ae8bc9f5	57	timeout = ms;
fyazgan	0:92b7ae8bc9f5	58	}
fyazgan	0:92b7ae8bc9f5	59
fyazgan	0:92b7ae8bc9f5	60	/**
fyazgan	0:92b7ae8bc9f5	61	* Read requested bytes.
fyazgan	0:92b7ae8bc9f5	62	*
fyazgan	0:92b7ae8bc9f5	63	* @param bytes A pointer to a buffer.
fyazgan	0:92b7ae8bc9f5	64	* @param requested Length.
fyazgan	0:92b7ae8bc9f5	65	*
fyazgan	0:92b7ae8bc9f5	66	* @return Readed byte length.
fyazgan	0:92b7ae8bc9f5	67	*/
fyazgan	0:92b7ae8bc9f5	68	size_t SerialBuffered::readBytes(uint8_t *bytes, size_t requested) {
fyazgan	0:92b7ae8bc9f5	69	int i = 0;
fyazgan	0:92b7ae8bc9f5	70	while (i < requested) {
fyazgan	0:92b7ae8bc9f5	71	int c = getc();
fyazgan	0:92b7ae8bc9f5	72	if (c < 0) {
fyazgan	0:92b7ae8bc9f5	73	break;
fyazgan	0:92b7ae8bc9f5	74	}
fyazgan	0:92b7ae8bc9f5	75	bytes[i] = c;
fyazgan	0:92b7ae8bc9f5	76	i++;
fyazgan	0:92b7ae8bc9f5	77	}
fyazgan	0:92b7ae8bc9f5	78	return i;
fyazgan	0:92b7ae8bc9f5	79	}
fyazgan	0:92b7ae8bc9f5	80
fyazgan	0:92b7ae8bc9f5	81	/**
fyazgan	0:92b7ae8bc9f5	82	* Get a character.
fyazgan	0:92b7ae8bc9f5	83	*
fyazgan	0:92b7ae8bc9f5	84	* @return A character. (-1:timeout)
fyazgan	0:92b7ae8bc9f5	85	*/
fyazgan	0:92b7ae8bc9f5	86	int SerialBuffered::getc() {
fyazgan	0:92b7ae8bc9f5	87	timer.reset();
fyazgan	0:92b7ae8bc9f5	88	timer.start();
fyazgan	0:92b7ae8bc9f5	89	while (indexContentStart == indexContentEnd) {
fyazgan	0:92b7ae8bc9f5	90	wait_ms(1);
fyazgan	0:92b7ae8bc9f5	91	if ((timeout > 0) && (timer.read_ms() > timeout)) {
fyazgan	0:92b7ae8bc9f5	92	/*
fyazgan	0:92b7ae8bc9f5	93	* Timeout occured.
fyazgan	0:92b7ae8bc9f5	94	*/
fyazgan	0:92b7ae8bc9f5	95	// printf("Timeout occured.\n");
fyazgan	0:92b7ae8bc9f5	96	return EOF;
fyazgan	0:92b7ae8bc9f5	97	}
fyazgan	0:92b7ae8bc9f5	98	}
fyazgan	0:92b7ae8bc9f5	99	timer.stop();
fyazgan	0:92b7ae8bc9f5	100
fyazgan	0:92b7ae8bc9f5	101	uint8_t result = buffer[indexContentStart++];
fyazgan	0:92b7ae8bc9f5	102	indexContentStart = indexContentStart % BUFFERSIZE;
fyazgan	0:92b7ae8bc9f5	103
fyazgan	0:92b7ae8bc9f5	104	return result;
fyazgan	0:92b7ae8bc9f5	105	}
fyazgan	0:92b7ae8bc9f5	106
fyazgan	0:92b7ae8bc9f5	107	/**
fyazgan	0:92b7ae8bc9f5	108	* Returns 1 if there is a character available to read, 0 otherwise.
fyazgan	0:92b7ae8bc9f5	109	*/
fyazgan	0:92b7ae8bc9f5	110	int SerialBuffered::readable() {
fyazgan	0:92b7ae8bc9f5	111	return indexContentStart != indexContentEnd;
fyazgan	0:92b7ae8bc9f5	112	}
fyazgan	0:92b7ae8bc9f5	113
fyazgan	0:92b7ae8bc9f5	114	void SerialBuffered::handleInterrupt() {
fyazgan	0:92b7ae8bc9f5	115	while (Serial::readable()) {
fyazgan	0:92b7ae8bc9f5	116	if (indexContentStart == ((indexContentEnd + 1) % BUFFERSIZE)) {
fyazgan	0:92b7ae8bc9f5	117	/*
fyazgan	0:92b7ae8bc9f5	118	* Buffer overrun occured.
fyazgan	0:92b7ae8bc9f5	119	*/
fyazgan	0:92b7ae8bc9f5	120	// printf("Buffer overrun occured.\n");
fyazgan	0:92b7ae8bc9f5	121	Serial::getc();
fyazgan	0:92b7ae8bc9f5	122	} else {
fyazgan	0:92b7ae8bc9f5	123	buffer[indexContentEnd++] = Serial::getc();
fyazgan	0:92b7ae8bc9f5	124	indexContentEnd = indexContentEnd % BUFFERSIZE;
fyazgan	0:92b7ae8bc9f5	125	}
fyazgan	0:92b7ae8bc9f5	126	}
fyazgan	0:92b7ae8bc9f5	127	}

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Type:	Library
Created:	02 Mar 2011
Imports:	45
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	2

SerialBuffered.cpp@0:92b7ae8bc9f5, 2011-03-02 (annotated)

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