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/*
Copyright (c) 2013 Arduino LLC. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <Console.h>
// Default constructor uses global Bridge instance
ConsoleClass::ConsoleClass() :
bridge(Bridge), buffered(0), readPos(0), buffer(NULL)
{
// Empty
}
// Constructor with a user provided BridgeClass instance
ConsoleClass::ConsoleClass(BridgeClass &_b) :
bridge(_b), buffered(0), readPos(0), buffer(NULL),
autoFlush(true)
{
// Empty
}
ConsoleClass::~ConsoleClass() {
end();
}
size_t ConsoleClass::write(uint8_t c) {
if (autoFlush) {
uint8_t tmp[] = { 'P', c };
bridge.transfer(tmp, 2);
return 1;
} else {
outBuffer[outBuffered++] = c;
if (outBuffered == outBufferSize)
flush();
}
}
size_t ConsoleClass::write(const uint8_t *buffer, size_t size) {
if (autoFlush) {
// TODO: do it in a more efficient way
uint8_t *tmp = new uint8_t[size+1];
tmp[0] = 'P';
memcpy(tmp+1, buffer, size);
bridge.transfer(tmp, size+1);
delete[] tmp;
return size;
} else {
while (size > 0) {
outBuffer[outBuffered++] = *buffer++;
size--;
if (outBuffered == outBufferSize)
flush();
}
}
}
void ConsoleClass::flush() {
if (autoFlush)
return;
bridge.transfer(outBuffer, outBuffered);
outBuffered = 1;
}
void ConsoleClass::setBuffer(uint8_t size) {
if (size==0) {
if (!autoFlush) {
delete[] outBuffer;
autoFlush = true;
}
} else {
if (autoFlush)
setBuffer(0);
outBuffer = new uint8_t[size+1];
outBuffer[0] = 'P'; // WRITE tag
outBufferSize = size+1;
outBuffered = 1;
}
}
bool ConsoleClass::connected() {
uint8_t tmp = 'a';
bridge.transfer(&tmp, 1, &tmp, 1);
return tmp==1;
}
int ConsoleClass::available() {
// Look if there is new data available
doBuffer();
return buffered;
}
int ConsoleClass::read() {
doBuffer();
if (buffered == 0)
return -1; // no chars available
else {
buffered--;
return buffer[readPos++];
}
}
int ConsoleClass::peek() {
doBuffer();
if (buffered == 0)
return -1; // no chars available
else
return buffer[readPos];
}
void ConsoleClass::doBuffer() {
// If there are already char in buffer exit
if (buffered > 0)
return;
// Try to buffer up to 32 characters
readPos = 0;
uint8_t tmp[] = { 'p', BUFFER_SIZE };
buffered = bridge.transfer(tmp, 2, buffer, BUFFER_SIZE);
}
void ConsoleClass::begin() {
bridge.begin();
end();
buffer = new uint8_t[BUFFER_SIZE];
}
void ConsoleClass::end() {
if (autoFlush) {
setBuffer(0);
}
if (buffer) {
delete[] buffer;
buffer = NULL;
}
}
ConsoleClass Console;
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