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Hi All,

I solved the mystery of the PICkit2 and EPIC.
The difference was the assembler. I programmed using both programmers on my old PC which had MPLAB installed properly and directed MCstudio...

Hi Dave,

I have attached a photo of my setup. The programming cable that I use is the same as I used for the EPIC except the MCLR pin had to be swapped position.
The PIC is powered by the board...

Hi Dave,

That was my typo, I was messing with a RS232 converter chip to see if it was a problem with true mode and also with different speeds and forgot to change the comment.
It doesn't matter...

Hi Henrik,

I have used the cmd form from Microcode studio and the stand-alone app from microchip for controlling the PICKit2, both have the same problem. I tried what you said and read back my...

Hi Dave,

I tried playing with the configuration string but I must be making a mistake, please look at my code. I'm sure its something simple that I have emitted or added that is wrong.
PS: I have...

Hi All,

I have been using PBP for years with my trusty EPIC programmer. Finally with no more parrallel ports I deciced to buy a PICKit 2.
I wrote a simple code using SEROUT2 and a flashing led....

'****************************************************************
'* How to write and then read back from an iButton EEPROM *
'* DS1973 or the equivalent 1-wire device, the DS2433 EEPROM. *...

I am so proud of the code I wrote for the DS1994 REAL TIME CLOCK & DS1973 EEPROM I think I must post both as they work so well and finally are relatively simple and there seems to be no sample code...

Thanks Darrel,

I got it right, it is now send back the letters test with this code...

'WRITE TO EEPROM
OWOUT ibutton,1,[$CC,$0F,$00,$00] 'Write to scratchpad
OWOUT...

Hi,

I modified my program using the authorisation code but I still seem not to get my data back.
This is my latest version (for a 16F877A)
...

Thanks Darrel,

Does this mean that I don't have to use the CRC calculation system?

Regards

Chris

I am only going to load data on the iButton EEPROM once, is it nessesary to use the "Cyclic Redundancy Checks" to write to the device or is it just an option like parity is on other serial systems....

I need to write to and then read back from a 1-wire EEPROM.
I have an iButton DS1973 which has the same insides as a
standard 1-wire DS2433 4Kb EEPROM.

I have read the datasheet, tried without...

Don't worry folks,

I am just going to take this super secure animal back where it came from and get a standard iButton EEPROM like the DS1973 which doesn't need all that calculation just to write...

Hi,

I just purchased a DS1961S iButton EEPROM. Seemed to be pretty straightforward until I started to write the code. Reading is standard 1-wire, but to write from the scratchpad to the EEPROM...

I like your style,

Keep it simple and functional. I think I am going to do it exactly as you say except I think to control the device I will include a iButton eeprom with a code on it which will...

Melanie,

I don't think I need Muslim prayers.
I agree, I don't think I really need such high accuracy (about a day in 6 months is OK)
Do you think I can get that using the PAUSE or the TIMER?
...

Thanks Melanie for your time,

I can see your point of not needing a rtc. You mentioned using PAUSE 1000 for my seconds count, don't you think this will be "very" inaccurate if the pic is also...

Melanie,

After thinking about it after my last post I thought maybe a good solution is a small PIC, a iButton eeprom with a code with a date and another that just keeps the output on with a small...

Melanie,

I need to keep the system running for at least 6 months +- a day or so.
The PLC is far from me (as in another country) so it is not easy or cheap to reset it or change the setting. My...

Melanie,

can you remember when you and Ralph figured out a very nifty way of generating Year, month, day, hours & seconds from the 32 bit value from the DS1994 Real Time Clock?

Here's the...

You really are something Melanie, you just put it so simply. I think I will use the analog method.

I have started a project using this clock and successfully programmed the time and date using the 1-wire protocol. There don't seem to be any extra application notes from Dallas/Maxim on this chip...

Thanks Melanie,

The device I'm making is to ensure that the customer pays, we have instances when we installed the system after they pay 2 thirds of the price and then never complete the payment,...

I've worked quite a bit with RS485 with various protocols for the security camera business.
As far as the cabling is concerned CAT5 or CAT6 is a pre/requisite if you want more that 50 metres. Less...