aboutsummaryrefslogtreecommitdiff
path: root/libraries/SoftwareSerial
diff options
context:
space:
mode:
authorDavid A. Mellis <d.mellis@arduino.cc>2009-06-01 08:32:11 +0000
committerDavid A. Mellis <d.mellis@arduino.cc>2009-06-01 08:32:11 +0000
commitdb605dd18b11ecfb5cd9f92c721c52cb70543384 (patch)
tree8a9029ffc560970ce1204ba86785ad44ef044906 /libraries/SoftwareSerial
First integration of the Arduino code in Processing 5503: PreProcessor and Compiler have been integrated with changes to the Sketch.
Compilation still has problems (Thread error on success, and can't handle non-pde files in a sketch). Modified the Mac OS X make.sh to copy the hardware, avr tools, and example over. Removing some of the antlr stuff. Disabling the Commander (command-line execution) for now. Added Library, LibraryManager, and Target. Added support for prefixed preferences (e.g. for boards and programmers).
Diffstat (limited to 'libraries/SoftwareSerial')
-rwxr-xr-xlibraries/SoftwareSerial/SoftwareSerial.cpp227
-rwxr-xr-xlibraries/SoftwareSerial/SoftwareSerial.h56
-rw-r--r--libraries/SoftwareSerial/keywords.txt18
3 files changed, 301 insertions, 0 deletions
diff --git a/libraries/SoftwareSerial/SoftwareSerial.cpp b/libraries/SoftwareSerial/SoftwareSerial.cpp
new file mode 100755
index 0000000..6df04d2
--- /dev/null
+++ b/libraries/SoftwareSerial/SoftwareSerial.cpp
@@ -0,0 +1,227 @@
+/*
+ SoftwareSerial.cpp - Software serial library
+ Copyright (c) 2006 David A. Mellis. 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
+*/
+
+/******************************************************************************
+ * Includes
+ ******************************************************************************/
+
+#include "WConstants.h"
+#include "SoftwareSerial.h"
+
+/******************************************************************************
+ * Definitions
+ ******************************************************************************/
+
+/******************************************************************************
+ * Constructors
+ ******************************************************************************/
+
+SoftwareSerial::SoftwareSerial(uint8_t receivePin, uint8_t transmitPin)
+{
+ _receivePin = receivePin;
+ _transmitPin = transmitPin;
+ _baudRate = 0;
+}
+
+/******************************************************************************
+ * User API
+ ******************************************************************************/
+
+void SoftwareSerial::begin(long speed)
+{
+ _baudRate = speed;
+ _bitPeriod = 1000000 / _baudRate;
+
+ digitalWrite(_transmitPin, HIGH);
+ delayMicroseconds( _bitPeriod); // if we were low this establishes the end
+}
+
+int SoftwareSerial::read()
+{
+ int val = 0;
+ int bitDelay = _bitPeriod - clockCyclesToMicroseconds(50);
+
+ // one byte of serial data (LSB first)
+ // ...--\ /--\/--\/--\/--\/--\/--\/--\/--\/--...
+ // \--/\--/\--/\--/\--/\--/\--/\--/\--/
+ // start 0 1 2 3 4 5 6 7 stop
+
+ while (digitalRead(_receivePin));
+
+ // confirm that this is a real start bit, not line noise
+ if (digitalRead(_receivePin) == LOW) {
+ // frame start indicated by a falling edge and low start bit
+ // jump to the middle of the low start bit
+ delayMicroseconds(bitDelay / 2 - clockCyclesToMicroseconds(50));
+
+ // offset of the bit in the byte: from 0 (LSB) to 7 (MSB)
+ for (int offset = 0; offset < 8; offset++) {
+ // jump to middle of next bit
+ delayMicroseconds(bitDelay);
+
+ // read bit
+ val |= digitalRead(_receivePin) << offset;
+ }
+
+ delayMicroseconds(_bitPeriod);
+
+ return val;
+ }
+
+ return -1;
+}
+
+void SoftwareSerial::print(uint8_t b)
+{
+ if (_baudRate == 0)
+ return;
+
+ int bitDelay = _bitPeriod - clockCyclesToMicroseconds(50); // a digitalWrite is about 50 cycles
+ byte mask;
+
+ digitalWrite(_transmitPin, LOW);
+ delayMicroseconds(bitDelay);
+
+ for (mask = 0x01; mask; mask <<= 1) {
+ if (b & mask){ // choose bit
+ digitalWrite(_transmitPin,HIGH); // send 1
+ }
+ else{
+ digitalWrite(_transmitPin,LOW); // send 1
+ }
+ delayMicroseconds(bitDelay);
+ }
+
+ digitalWrite(_transmitPin, HIGH);
+ delayMicroseconds(bitDelay);
+}
+
+void SoftwareSerial::print(const char *s)
+{
+ while (*s)
+ print(*s++);
+}
+
+void SoftwareSerial::print(char c)
+{
+ print((uint8_t) c);
+}
+
+void SoftwareSerial::print(int n)
+{
+ print((long) n);
+}
+
+void SoftwareSerial::print(unsigned int n)
+{
+ print((unsigned long) n);
+}
+
+void SoftwareSerial::print(long n)
+{
+ if (n < 0) {
+ print('-');
+ n = -n;
+ }
+ printNumber(n, 10);
+}
+
+void SoftwareSerial::print(unsigned long n)
+{
+ printNumber(n, 10);
+}
+
+void SoftwareSerial::print(long n, int base)
+{
+ if (base == 0)
+ print((char) n);
+ else if (base == 10)
+ print(n);
+ else
+ printNumber(n, base);
+}
+
+void SoftwareSerial::println(void)
+{
+ print('\r');
+ print('\n');
+}
+
+void SoftwareSerial::println(char c)
+{
+ print(c);
+ println();
+}
+
+void SoftwareSerial::println(const char c[])
+{
+ print(c);
+ println();
+}
+
+void SoftwareSerial::println(uint8_t b)
+{
+ print(b);
+ println();
+}
+
+void SoftwareSerial::println(int n)
+{
+ print(n);
+ println();
+}
+
+void SoftwareSerial::println(long n)
+{
+ print(n);
+ println();
+}
+
+void SoftwareSerial::println(unsigned long n)
+{
+ print(n);
+ println();
+}
+
+void SoftwareSerial::println(long n, int base)
+{
+ print(n, base);
+ println();
+}
+
+// Private Methods /////////////////////////////////////////////////////////////
+
+void SoftwareSerial::printNumber(unsigned long n, uint8_t base)
+{
+ unsigned char buf[8 * sizeof(long)]; // Assumes 8-bit chars.
+ unsigned long i = 0;
+
+ if (n == 0) {
+ print('0');
+ return;
+ }
+
+ while (n > 0) {
+ buf[i++] = n % base;
+ n /= base;
+ }
+
+ for (; i > 0; i--)
+ print((char) (buf[i - 1] < 10 ? '0' + buf[i - 1] : 'A' + buf[i - 1] - 10));
+}
diff --git a/libraries/SoftwareSerial/SoftwareSerial.h b/libraries/SoftwareSerial/SoftwareSerial.h
new file mode 100755
index 0000000..95753fc
--- /dev/null
+++ b/libraries/SoftwareSerial/SoftwareSerial.h
@@ -0,0 +1,56 @@
+/*
+ SoftwareSerial.h - Software serial library
+ Copyright (c) 2006 David A. Mellis. 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
+*/
+
+#ifndef SoftwareSerial_h
+#define SoftwareSerial_h
+
+#include <inttypes.h>
+
+class SoftwareSerial
+{
+ private:
+ uint8_t _receivePin;
+ uint8_t _transmitPin;
+ long _baudRate;
+ int _bitPeriod;
+ void printNumber(unsigned long, uint8_t);
+ public:
+ SoftwareSerial(uint8_t, uint8_t);
+ void begin(long);
+ int read();
+ void print(char);
+ void print(const char[]);
+ void print(uint8_t);
+ void print(int);
+ void print(unsigned int);
+ void print(long);
+ void print(unsigned long);
+ void print(long, int);
+ void println(void);
+ void println(char);
+ void println(const char[]);
+ void println(uint8_t);
+ void println(int);
+ void println(long);
+ void println(unsigned long);
+ void println(long, int);
+};
+
+#endif
+
diff --git a/libraries/SoftwareSerial/keywords.txt b/libraries/SoftwareSerial/keywords.txt
new file mode 100644
index 0000000..de5a74c
--- /dev/null
+++ b/libraries/SoftwareSerial/keywords.txt
@@ -0,0 +1,18 @@
+#######################################
+# Syntax Coloring Map For Ultrasound
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+SoftwareSerial KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+#######################################
+# Constants (LITERAL1)
+#######################################
+