markuslange / onewireslave Goto Github PK

Is this code working for someone at all?
I couldn't get my DS9490 to recognize my custom slave. Reading what happens shows me, that 'waitForRequest()' aborts when 'presence()' doesn't return TRUE. Looking at the code, it actually returns nothing... what's wrong?

Is there any working tiny 1-Wire Slave library for Arduino GUI around here?

Seems it is necessary to use interrupts() instead of sei() and noInterrupts() instead of cli() in OneWireSlave.cpp. Then it will compile fine in ARM mode for Due with Arduino 1.5.7, otherwise cli) and sei() are not recognised.

Git

I reduced DS18B20_Slave_Interrupt_T3 as much as possible:
void setup() { Serial.begin(115200); Serial.println("Start"); pinMode(tstpin, OUTPUT); ds.init(rom); ds.setScratchpad(scratchpad); ds.setPower(PARASITE); ds.setResolution(9); attachInterrupt(12, DS18B20p, CHANGE); } void loop() { ds.waitForRequest(true); } void DS18B20p() { previousmicros = micros(); difference = previousmicros - old_previousmicros; if (difference >= 380 && difference <= 800) { //on Leonardo // if (difference >= 325 && difference <= 500) { ds.waitForRequestInterrupt(false); } }

Exactly every second request results in NO PRESENCE:

Start packet transmitting RESET PRESENCE No address selected 33 (READ ROM) Packet transmitted successfully Reading byte(s) 28 48 A0 AE 08 00 00 60 Done Start packet transmitting RESET **NO PRESENCE** Start packet transmitting RESET PRESENCE No address selected 33 (READ ROM) Packet transmitted successfully Reading byte(s) 28 48 A0 AE 08 00 00 60 Done Start packet transmitting RESET **NO PRESENCE**

I also could see in oscillosope the absence of the presence pulse every second request.

Project does not work for me

Two different programs do not recognize an emulated DS1990a:

• arduino onewire library (for master device emulation)
• a windows onebus reader software

My source code:

#include "OneWireSlave.h"

unsigned char rom[8] = {0x28, 0xAD, 0xDA, 0xCE, 0x0F, 0x00, 0x11, 0x00};

unsigned char scratchpad[10] = {0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01};

//{0x01, 0xC8, 0x01, 0x4B, 0x46, 0x7F, 0xFF, 0x08, 0x10, 0x3F};

OneWireSlave ds(2); //+5V behind Resistor and connection on pin 2

void setup() {
  Serial.begin(9600);
  ds.init(rom);
}

void loop() {
  Serial.println("loop");
  ds.waitForRequest(false);
}

One of the readers looks like this and runs on a separate Arduino Uno. It was originally written for DS1992 so loops taking memory into account might not end soon enough, yet i did not even get to this point. Disabling if (presence) continue seemed to not help much (see not yet proposed commit )

#include <OneWire.h>

OneWire  ds(2);    // 1-wire on pin 2
byte     addr[8];  // Contains the eeprom unique ID

void setup(void)
{
  Serial.begin(9600);
  digitalWrite(2, HIGH);
}

void loop(void)
{
  byte i;
  byte actually_useful_data[16];

  SearchAddress(addr);

  ReadAllMem();    //print all mem content

  Serial.print("Pause \n");
  delay(5000);
}

void SearchAddress(byte* address) //Search for address and confirm it
{
  int i;
  if ( !ds.search(address))
  {
    Serial.print("No device found.\n");
    ds.reset_search();
    delay(250);
  }

  Serial.print("ADDR= ");
  for ( i = 0; i < 8; i++)
  {
    Serial.print(address[i], HEX);
    Serial.print(" ");
  }

  if ( OneWire::crc8( address, 7) != address[7])
  {
    Serial.print("CRC is not valid, address is corrupted\n");
    return;
  }

  if ( address[0] != 0x08)
  {
    Serial.print("Device is not a 1-wire Eeprom.\n");
    return;
  }
  Serial.println();
}

void ReadAllMem()
{
  int i;
  ds.reset();
  ds.select(addr);
  ds.write(0xF0, 1); // Read Memory
  ds.write(0x00, 1); // Read Offset (xx): 00 xxh
  ds.write(0x00, 1); // Read Offset (yy): yy 00h

  for ( i = 1; i <= 128; i++) //whole mem is 144
  {

    Serial.print(ds.read(), HEX);
    Serial.print(" ");
    if ((i % 16) == 0){
      Serial.println(); 
    }
  }
  Serial.println();
}

Hi
Hav have tried to get this to work on an Arduino Nano and an ATtiny85 but with no luck.
I can compile to both and Pin 13 LED is flashing, but the onewire host cannot se the device.
I found a few other samles on the net that runs on either the Nano or the tiny.
I tried all of the examples (had to modify af few to be able to compile)
I use D2 for ow-signal on both Nano and Tiny.
What am I missing?
Any help is highly appreciated.
Erik

Hello. I noticed DIRECT_WRITE_HIGH call in sendBit. Shoul not it be changed to DIRECT_MODE_INPUT to make bus float? The specs say that devices should not (and do not have to) pull the bus high. This issue will probably break my project where an raspberry master (with 3.3V) communicates with arduino slave (by pulling the bus to 5V arduino will probably damage rpi).

The DS1990A example cannot be compiled:
"DS1990A:13: error: 'class OneWireSlave' has no member named 'setRom'"

This is strange, I can't really see what is happening. I tried the new version on Due but could not get sensible values from the sensor. So I switched to Mega, changed the pin to suit, and immediately got this error :

In file included from E:\EDA\Arduino\libraries\OneWireSlave-master\OneWireSlave.cpp:60:0:
E:\EDA\Arduino\libraries\OneWireSlave-master\OneWireSlave.h:35:4: error: #error "Not an Interrupt Pin"
#error "Not an Interrupt Pin"
^
E:\EDA\Arduino\libraries\OneWireSlave-master\OneWireSlave.h:36:4: error: #error "Use 2, 3, 18, 19, 20 or 21"

#error "Use 2, 3, 18, 19, 20 or 21"

I have tried #define dsslavepin as 2, 3, 18, 19, 20 and 21 and I get the same error everytime I save then compile. I am using Mega2560 setting and Arduino Mega 2560 board.