data saving using 8051 microcontroller

[ifithegr8]

data saving using 8051

Hi all.
i want to do is that my prototype contaning LCD temp sensor and voltsensor(ADC0831) takes values in some open location where there is not possiable to install whole PC ,after every 5 minutes and store them somewhere and then I plug it to RS232 with my PC and ask controller to send data and it sends me the recorded data.What should I use EEPROM????
I need Hardware Idea

 

[bassa]

Re: data saving using 8051

Hi,

yes you can use 2K inbuilt EEPROM of the Atmel 89S8253 or 89S8252 chips. More details available in http://www.atmel.com/products/8051/

regards
bassa

 

[IanP]

Re: data saving using 8051

I think better option is to go for an external EEProm, as you are not limited to a certain type of microcontroller and "only" 2kB ..
There are many publications that describe I2C-based EEProms in great details ..
Here is one example:
**broken link removed**

Using the same I2C interface (can be done with two standard microcontroller pins) you can add Real-Time-Clock and "stam" each set of data with Time and Date ..
See this example:
https://www.dharmanitech.com/2008/08/interfacing-rtc-serial-eeprom-using-i2c.html

Rgds,
IanP

 

[ifithegr8]

data saving using 8051

there is no problem interfacing EEPROM i have done it many times, but problem is that if i have to leave system on testing and saving three values Temperature,Voltage and current in EEPROM than wont it get full and how to save it i am using AT89C52 and 24LC256 EEPROM.

Added after 2 minutes:

how to save it---> i mean that i have been writing values to adresses in EEprom and getting back from that adress i knew those addresses but now how to write auto algo that saves and gets everything accurately

 

[ctownsend]

Re: data saving using 8051

how do you write code, C or assembly?

I can give you ready to use routines in assembly for 89C52 & 24C256, just let me know.

Be sure you use 10K pullup resistors on both clock and data lines going to the eeprom!!

 

[ifithegr8]

data saving using 8051

i write code in c.and why pull ups????

Added after 29 seconds:

can u help me in c??

 

[ctownsend]

Re: data saving using 8051

can u help me in c??

sorry I don't do C, only asm.

Try searching google, I am sure you will come up with something.

Good Luck