Add OneWire library to dependencies folder

libdeps/OneWire/OneWire.h

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+#ifndef OneWire_h
+#define OneWire_h
+
+#ifdef __cplusplus
+
+#include <stdint.h>
+
+#if defined(__AVR__)
+#include <util/crc16.h>
+#endif
+
+#if ARDUINO >= 100
+#include <Arduino.h>       // for delayMicroseconds, digitalPinToBitMask, etc
+#else
+#include "WProgram.h"      // for delayMicroseconds
+#include "pins_arduino.h"  // for digitalPinToBitMask, etc
+#endif
+
+// You can exclude certain features from OneWire.  In theory, this
+// might save some space.  In practice, the compiler automatically
+// removes unused code (technically, the linker, using -fdata-sections
+// and -ffunction-sections when compiling, and Wl,--gc-sections
+// when linking), so most of these will not result in any code size
+// reduction.  Well, unless you try to use the missing features
+// and redesign your program to not need them!  ONEWIRE_CRC8_TABLE
+// is the exception, because it selects a fast but large algorithm
+// or a small but slow algorithm.
+
+// you can exclude onewire_search by defining that to 0
+#ifndef ONEWIRE_SEARCH
+#define ONEWIRE_SEARCH 1
+#endif
+
+// You can exclude CRC checks altogether by defining this to 0
+#ifndef ONEWIRE_CRC
+#define ONEWIRE_CRC 1
+#endif
+
+// Select the table-lookup method of computing the 8-bit CRC
+// by setting this to 1.  The lookup table enlarges code size by
+// about 250 bytes.  It does NOT consume RAM (but did in very
+// old versions of OneWire).  If you disable this, a slower
+// but very compact algorithm is used.
+#ifndef ONEWIRE_CRC8_TABLE
+#define ONEWIRE_CRC8_TABLE 1
+#endif
+
+// You can allow 16-bit CRC checks by defining this to 1
+// (Note that ONEWIRE_CRC must also be 1.)
+#ifndef ONEWIRE_CRC16
+#define ONEWIRE_CRC16 1
+#endif
+
+// Board-specific macros for direct GPIO
+#include "util/OneWire_direct_regtype.h"
+
+class OneWire
+{
+  private:
+    IO_REG_TYPE bitmask;
+    volatile IO_REG_TYPE *baseReg;
+
+#if ONEWIRE_SEARCH
+    // global search state
+    unsigned char ROM_NO[8];
+    uint8_t LastDiscrepancy;
+    uint8_t LastFamilyDiscrepancy;
+    bool LastDeviceFlag;
+#endif
+
+  public:
+    OneWire() { }
+    OneWire(uint8_t pin) { begin(pin); }
+    void begin(uint8_t pin);
+
+    // Perform a 1-Wire reset cycle. Returns 1 if a device responds
+    // with a presence pulse.  Returns 0 if there is no device or the
+    // bus is shorted or otherwise held low for more than 250uS
+    uint8_t reset(void);
+
+    // Issue a 1-Wire rom select command, you do the reset first.
+    void select(const uint8_t rom[8]);
+
+    // Issue a 1-Wire rom skip command, to address all on bus.
+    void skip(void);
+
+    // Write a byte. If 'power' is one then the wire is held high at
+    // the end for parasitically powered devices. You are responsible
+    // for eventually depowering it by calling depower() or doing
+    // another read or write.
+    void write(uint8_t v, uint8_t power = 0);
+
+    void write_bytes(const uint8_t *buf, uint16_t count, bool power = 0);
+
+    // Read a byte.
+    uint8_t read(void);
+
+    void read_bytes(uint8_t *buf, uint16_t count);
+
+    // Write a bit. The bus is always left powered at the end, see
+    // note in write() about that.
+    void write_bit(uint8_t v);
+
+    // Read a bit.
+    uint8_t read_bit(void);
+
+    // Stop forcing power onto the bus. You only need to do this if
+    // you used the 'power' flag to write() or used a write_bit() call
+    // and aren't about to do another read or write. You would rather
+    // not leave this powered if you don't have to, just in case
+    // someone shorts your bus.
+    void depower(void);
+
+#if ONEWIRE_SEARCH
+    // Clear the search state so that if will start from the beginning again.
+    void reset_search();
+
+    // Setup the search to find the device type 'family_code' on the next call
+    // to search(*newAddr) if it is present.
+    void target_search(uint8_t family_code);
+
+    // Look for the next device. Returns 1 if a new address has been
+    // returned. A zero might mean that the bus is shorted, there are
+    // no devices, or you have already retrieved all of them.  It
+    // might be a good idea to check the CRC to make sure you didn't
+    // get garbage.  The order is deterministic. You will always get
+    // the same devices in the same order.
+    bool search(uint8_t *newAddr, bool search_mode = true);
+#endif
+
+#if ONEWIRE_CRC
+    // Compute a Dallas Semiconductor 8 bit CRC, these are used in the
+    // ROM and scratchpad registers.
+    static uint8_t crc8(const uint8_t *addr, uint8_t len);
+
+#if ONEWIRE_CRC16
+    // Compute the 1-Wire CRC16 and compare it against the received CRC.
+    // Example usage (reading a DS2408):
+    //    // Put everything in a buffer so we can compute the CRC easily.
+    //    uint8_t buf[13];
+    //    buf[0] = 0xF0;    // Read PIO Registers
+    //    buf[1] = 0x88;    // LSB address
+    //    buf[2] = 0x00;    // MSB address
+    //    WriteBytes(net, buf, 3);    // Write 3 cmd bytes
+    //    ReadBytes(net, buf+3, 10);  // Read 6 data bytes, 2 0xFF, 2 CRC16
+    //    if (!CheckCRC16(buf, 11, &buf[11])) {
+    //        // Handle error.
+    //    }     
+    //          
+    // @param input - Array of bytes to checksum.
+    // @param len - How many bytes to use.
+    // @param inverted_crc - The two CRC16 bytes in the received data.
+    //                       This should just point into the received data,
+    //                       *not* at a 16-bit integer.
+    // @param crc - The crc starting value (optional)
+    // @return True, iff the CRC matches.
+    static bool check_crc16(const uint8_t* input, uint16_t len, const uint8_t* inverted_crc, uint16_t crc = 0);
+
+    // Compute a Dallas Semiconductor 16 bit CRC.  This is required to check
+    // the integrity of data received from many 1-Wire devices.  Note that the
+    // CRC computed here is *not* what you'll get from the 1-Wire network,
+    // for two reasons:
+    //   1) The CRC is transmitted bitwise inverted.
+    //   2) Depending on the endian-ness of your processor, the binary
+    //      representation of the two-byte return value may have a different
+    //      byte order than the two bytes you get from 1-Wire.
+    // @param input - Array of bytes to checksum.
+    // @param len - How many bytes to use.
+    // @param crc - The crc starting value (optional)
+    // @return The CRC16, as defined by Dallas Semiconductor.
+    static uint16_t crc16(const uint8_t* input, uint16_t len, uint16_t crc = 0);
+#endif
+#endif
+};
+
+// Prevent this name from leaking into Arduino sketches
+#ifdef IO_REG_TYPE
+#undef IO_REG_TYPE
+#endif
+
+#endif // __cplusplus
+#endif // OneWire_h

libdeps/OneWire/examples/DS18x20_Temperature/DS18x20_Temperature.ino

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+#include <OneWire.h>
+
+// OneWire DS18S20, DS18B20, DS1822 Temperature Example
+//
+// http://www.pjrc.com/teensy/td_libs_OneWire.html
+//
+// The DallasTemperature library can do all this work for you!
+// https://github.com/milesburton/Arduino-Temperature-Control-Library
+
+OneWire  ds(10);  // on pin 10 (a 4.7K resistor is necessary)
+
+void setup(void) {
+  Serial.begin(9600);
+}
+
+void loop(void) {
+  byte i;
+  byte present = 0;
+  byte type_s;
+  byte data[9];
+  byte addr[8];
+  float celsius, fahrenheit;
+
+  if ( !ds.search(addr)) {
+    Serial.println("No more addresses.");
+    Serial.println();
+    ds.reset_search();
+    delay(250);
+    return;
+  }
+
+  Serial.print("ROM =");
+  for( i = 0; i < 8; i++) {
+    Serial.write(' ');
+    Serial.print(addr[i], HEX);
+  }
+
+  if (OneWire::crc8(addr, 7) != addr[7]) {
+      Serial.println("CRC is not valid!");
+      return;
+  }
+  Serial.println();
+
+  // the first ROM byte indicates which chip
+  switch (addr[0]) {
+    case 0x10:
+      Serial.println("  Chip = DS18S20");  // or old DS1820
+      type_s = 1;
+      break;
+    case 0x28:
+      Serial.println("  Chip = DS18B20");
+      type_s = 0;
+      break;
+    case 0x22:
+      Serial.println("  Chip = DS1822");
+      type_s = 0;
+      break;
+    default:
+      Serial.println("Device is not a DS18x20 family device.");
+      return;
+  } 
+
+  ds.reset();
+  ds.select(addr);
+  ds.write(0x44, 1);        // start conversion, with parasite power on at the end
+
+  delay(1000);     // maybe 750ms is enough, maybe not
+  // we might do a ds.depower() here, but the reset will take care of it.
+
+  present = ds.reset();
+  ds.select(addr);    
+  ds.write(0xBE);         // Read Scratchpad
+
+  Serial.print("  Data = ");
+  Serial.print(present, HEX);
+  Serial.print(" ");
+  for ( i = 0; i < 9; i++) {           // we need 9 bytes
+    data[i] = ds.read();
+    Serial.print(data[i], HEX);
+    Serial.print(" ");
+  }
+  Serial.print(" CRC=");
+  Serial.print(OneWire::crc8(data, 8), HEX);
+  Serial.println();
+
+  // Convert the data to actual temperature
+  // because the result is a 16 bit signed integer, it should
+  // be stored to an "int16_t" type, which is always 16 bits
+  // even when compiled on a 32 bit processor.
+  int16_t raw = (data[1] << 8) | data[0];
+  if (type_s) {
+    raw = raw << 3; // 9 bit resolution default
+    if (data[7] == 0x10) {
+      // "count remain" gives full 12 bit resolution
+      raw = (raw & 0xFFF0) + 12 - data[6];
+    }
+  } else {
+    byte cfg = (data[4] & 0x60);
+    // at lower res, the low bits are undefined, so let's zero them
+    if (cfg == 0x00) raw = raw & ~7;  // 9 bit resolution, 93.75 ms
+    else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
+    else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
+    //// default is 12 bit resolution, 750 ms conversion time
+  }
+  celsius = (float)raw / 16.0;
+  fahrenheit = celsius * 1.8 + 32.0;
+  Serial.print("  Temperature = ");
+  Serial.print(celsius);
+  Serial.print(" Celsius, ");
+  Serial.print(fahrenheit);
+  Serial.println(" Fahrenheit");
+}

libdeps/OneWire/examples/DS2408_Switch/DS2408_Switch.ino

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+#include <OneWire.h>
+
+/*
+ * DS2408 8-Channel Addressable Switch
+ *
+ * Writte by Glenn Trewitt, glenn at trewitt dot org
+ *
+ * Some notes about the DS2408:
+ *   - Unlike most input/output ports, the DS2408 doesn't have mode bits to
+ *       set whether the pins are input or output.  If you issue a read command,
+ *       they're inputs.  If you write to them, they're outputs.
+ *   - For reading from a switch, you should use 10K pull-up resisters.
+ */
+
+OneWire net(10);  // on pin 10
+
+
+void PrintBytes(const uint8_t* addr, uint8_t count, bool newline=false) {
+  for (uint8_t i = 0; i < count; i++) {
+    Serial.print(addr[i]>>4, HEX);
+    Serial.print(addr[i]&0x0f, HEX);
+  }
+  if (newline)
+    Serial.println();
+}
+
+
+void setup(void) {
+  Serial.begin(9600);
+}
+
+void loop(void) {
+  byte addr[8];
+
+  if (!net.search(addr)) {
+    Serial.print("No more addresses.\n");
+    net.reset_search();
+    delay(1000);
+    return;
+  }
+
+  if (OneWire::crc8(addr, 7) != addr[7]) {
+    Serial.print("CRC is not valid!\n");
+    return;
+  }
+
+  if (addr[0] != 0x29) {
+    PrintBytes(addr, 8);
+    Serial.print(" is not a DS2408.\n");
+    return;
+  }
+
+  Serial.print("  Reading DS2408 ");
+  PrintBytes(addr, 8);
+  Serial.println();
+
+  uint8_t buf[13];  // Put everything in the buffer so we can compute CRC easily.
+  buf[0] = 0xF0;    // Read PIO Registers
+  buf[1] = 0x88;    // LSB address
+  buf[2] = 0x00;    // MSB address
+  net.write_bytes(buf, 3);
+  net.read_bytes(buf+3, 10);     // 3 cmd bytes, 6 data bytes, 2 0xFF, 2 CRC16
+  net.reset();
+
+  if (!OneWire::check_crc16(buf, 11, &buf[11])) {
+    Serial.print("CRC failure in DS2408 at ");
+    PrintBytes(addr, 8, true);
+    return;
+  }
+  Serial.print("  DS2408 data = ");
+  // First 3 bytes contain command, register address.
+  Serial.println(buf[3], BIN);
+}
+