An arduino library to communicate using the Dallas one-wire protocol, where the Arduino takes the role of a slave.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

83 lines
1.4 KiB

#include "Arduino.h"
#include "LowLevel.h"
#include "SerialChannel.h"
#include "OneWireSlave.h"
#define LEDPin 13
#define OWPin 2
SerialChannel debug("debug");
Pin led(LEDPin);
byte owROM[7] = { 0xE2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 };
byte buffer1[8];
byte buffer2[8];
volatile byte* backBuffer = buffer1;
volatile byte bufferPos = 0;
byte sendBuffer[8];
void owReceive(OneWireSlave::ReceiveEvent evt, byte data);
void setup()
{
led.outputMode();
led.writeLow();
OneWire.setReceiveCallback(&owReceive);
OneWire.begin(owROM, OWPin);
Serial.begin(9600);
}
10 years ago
int count = 0;
void loop()
{
10 years ago
delay(1);
if (count++ == 1000)
{
led.write(!led.read());
count = 0;
10 years ago
}
cli();//disable interrupts
SerialChannel::swap();
byte* frontBuffer = (byte*)backBuffer;
byte frontBufferSize = bufferPos;
backBuffer = backBuffer == buffer1 ? buffer2 : buffer1;
bufferPos = 0;
sei();//enable interrupts
SerialChannel::flush();
for (int i = 0; i < frontBufferSize; ++i)
{
char msg[16];
sprintf(msg, "Received byte: %d", (int)frontBuffer[i]);
debug.write(msg);
if (frontBuffer[i] == 0x42)
{
sendBuffer[0] = 0xBA;
sendBuffer[1] = 0xAD;
sendBuffer[2] = 0xF0;
sendBuffer[3] = 0x0D;
OneWire.write(sendBuffer, 4, 0);
}
}
}
void owReceive(OneWireSlave::ReceiveEvent evt, byte data)
{
switch (evt)
{
case OneWireSlave::RE_Byte:
backBuffer[bufferPos++] = data;
break;
default:
;
}
}