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Basic support for esp8266 platform
This includes empty stubs for most core Arduino functions. Need to actually implement all those digital reads writes whatever. Need to prebuild toolchains (xtensa-elf-lx106) for 3 platforms and put them on some download server. Need to do the same with esptool. Need to fix 0x40000 binary generation and add correct upload commands. Maybe even implement uploads over WiFi.
This commit is contained in:
Ivan Grokhotkov
270
cores/esp8266/Stream.cpp
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270
cores/esp8266/Stream.cpp
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/*
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Stream.cpp - adds parsing methods to Stream class
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Copyright (c) 2008 David A. Mellis. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Created July 2011
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parsing functions based on TextFinder library by Michael Margolis
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*/
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#include "Arduino.h"
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#include "Stream.h"
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#define PARSE_TIMEOUT 1000 // default number of milli-seconds to wait
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#define NO_SKIP_CHAR 1 // a magic char not found in a valid ASCII numeric field
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// private method to read stream with timeout
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int Stream::timedRead()
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{
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int c;
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_startMillis = millis();
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do {
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c = read();
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if (c >= 0) return c;
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} while(millis() - _startMillis < _timeout);
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return -1; // -1 indicates timeout
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}
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// private method to peek stream with timeout
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int Stream::timedPeek()
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{
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int c;
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_startMillis = millis();
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do {
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c = peek();
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if (c >= 0) return c;
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} while(millis() - _startMillis < _timeout);
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return -1; // -1 indicates timeout
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}
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// returns peek of the next digit in the stream or -1 if timeout
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// discards non-numeric characters
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int Stream::peekNextDigit()
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{
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int c;
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while (1) {
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c = timedPeek();
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if (c < 0) return c; // timeout
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if (c == '-') return c;
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if (c >= '0' && c <= '9') return c;
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read(); // discard non-numeric
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}
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}
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// Public Methods
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//////////////////////////////////////////////////////////////
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void Stream::setTimeout(unsigned long timeout) // sets the maximum number of milliseconds to wait
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{
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_timeout = timeout;
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}
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// find returns true if the target string is found
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bool Stream::find(char *target)
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{
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return findUntil(target, (char*)"");
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}
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// reads data from the stream until the target string of given length is found
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// returns true if target string is found, false if timed out
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bool Stream::find(char *target, size_t length)
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{
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return findUntil(target, length, NULL, 0);
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}
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// as find but search ends if the terminator string is found
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bool Stream::findUntil(char *target, char *terminator)
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{
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return findUntil(target, strlen(target), terminator, strlen(terminator));
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}
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// reads data from the stream until the target string of the given length is found
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// search terminated if the terminator string is found
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// returns true if target string is found, false if terminated or timed out
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bool Stream::findUntil(char *target, size_t targetLen, char *terminator, size_t termLen)
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{
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size_t index = 0; // maximum target string length is 64k bytes!
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size_t termIndex = 0;
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int c;
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if( *target == 0)
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return true; // return true if target is a null string
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while( (c = timedRead()) > 0){
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if(c != target[index])
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index = 0; // reset index if any char does not match
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if( c == target[index]){
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//////Serial.print("found "); Serial.write(c); Serial.print("index now"); Serial.println(index+1);
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if(++index >= targetLen){ // return true if all chars in the target match
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return true;
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}
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}
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if(termLen > 0 && c == terminator[termIndex]){
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if(++termIndex >= termLen)
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return false; // return false if terminate string found before target string
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}
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else
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termIndex = 0;
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}
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return false;
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}
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// returns the first valid (long) integer value from the current position.
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// initial characters that are not digits (or the minus sign) are skipped
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// function is terminated by the first character that is not a digit.
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long Stream::parseInt()
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{
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return parseInt(NO_SKIP_CHAR); // terminate on first non-digit character (or timeout)
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}
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// as above but a given skipChar is ignored
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// this allows format characters (typically commas) in values to be ignored
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long Stream::parseInt(char skipChar)
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{
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boolean isNegative = false;
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long value = 0;
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int c;
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c = peekNextDigit();
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// ignore non numeric leading characters
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if(c < 0)
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return 0; // zero returned if timeout
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do{
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if(c == skipChar)
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; // ignore this charactor
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else if(c == '-')
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isNegative = true;
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else if(c >= '0' && c <= '9') // is c a digit?
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value = value * 10 + c - '0';
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read(); // consume the character we got with peek
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c = timedPeek();
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}
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while( (c >= '0' && c <= '9') || c == skipChar );
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if(isNegative)
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value = -value;
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return value;
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}
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// as parseInt but returns a floating point value
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float Stream::parseFloat()
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{
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return parseFloat(NO_SKIP_CHAR);
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}
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// as above but the given skipChar is ignored
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// this allows format characters (typically commas) in values to be ignored
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float Stream::parseFloat(char skipChar){
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boolean isNegative = false;
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boolean isFraction = false;
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long value = 0;
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int c;
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float fraction = 1.0;
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c = peekNextDigit();
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// ignore non numeric leading characters
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if(c < 0)
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return 0; // zero returned if timeout
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do{
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if(c == skipChar)
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; // ignore
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else if(c == '-')
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isNegative = true;
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else if (c == '.')
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isFraction = true;
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else if(c >= '0' && c <= '9') { // is c a digit?
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value = value * 10 + c - '0';
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if(isFraction)
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fraction *= 0.1;
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}
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read(); // consume the character we got with peek
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c = timedPeek();
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}
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while( (c >= '0' && c <= '9') || c == '.' || c == skipChar );
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if(isNegative)
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value = -value;
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if(isFraction)
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return value * fraction;
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else
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return value;
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}
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// read characters from stream into buffer
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// terminates if length characters have been read, or timeout (see setTimeout)
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// returns the number of characters placed in the buffer
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// the buffer is NOT null terminated.
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//
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size_t Stream::readBytes(char *buffer, size_t length)
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{
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size_t count = 0;
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while (count < length) {
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int c = timedRead();
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if (c < 0) break;
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*buffer++ = (char)c;
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count++;
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}
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return count;
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}
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// as readBytes with terminator character
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// terminates if length characters have been read, timeout, or if the terminator character detected
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// returns the number of characters placed in the buffer (0 means no valid data found)
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size_t Stream::readBytesUntil(char terminator, char *buffer, size_t length)
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{
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if (length < 1) return 0;
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size_t index = 0;
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while (index < length) {
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int c = timedRead();
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if (c < 0 || c == terminator) break;
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*buffer++ = (char)c;
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index++;
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}
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return index; // return number of characters, not including null terminator
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}
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String Stream::readString()
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{
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String ret;
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int c = timedRead();
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while (c >= 0)
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{
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ret += (char)c;
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c = timedRead();
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}
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return ret;
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}
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String Stream::readStringUntil(char terminator)
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{
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String ret;
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int c = timedRead();
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while (c >= 0 && c != terminator)
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{
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ret += (char)c;
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c = timedRead();
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}
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return ret;
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}
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