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I, Tejas Randeria, Embedded Engineer.
Working in the RF field since 6 months.
Developed circuits on RFm12 and also Xbee Series 2
Would Like to share and obtain knowledge
If possible use another RF module, I am currently using RFM12 which are available in India. They are also easy to configure.
Use can as many transmitter and receiver pairs.
9 tx and 1 rx very much possible, no problems at all.
The following program dont work, cant figure out why. I've tried all kinds of configurations for the RFM12 module in this code.
The hardware is connected in the right way, its 868Mhz RFM12 Module.
The transmitter code seems to be correct, but the receiver is creating an issue.
Receiver Code For...
Okay, I have understood, that the pointer is going to be holding the latest location written into the eeprom. So that we can access it after a reset or power down or any such interruption.
Is this pointer user defined?
Wont the pointer value be erased after the above interruption occurs?
And...
The data set is of fixed variable length.
as you know eeprom can be written many times over.
okay I got idea of storing the pointer as well in the eeprom. But then consider a situation wherein the eeprom is already full of data, and it starts writing into the eeprom over the older data from the...
Thank you for the reply.
But my question to your answer is, upon reset or power down wouldn't all the data we have on the pic be changed to their default values, so basically i will lose all the current values in the variables after reset. So then how would I have access to my latest data on...
We have a system in which data is stored in the eeprom after every 10 minutes.
There is a situation, power down occurs, so the problem is to find the latest data, and start storing new data from consecutive locations from latest data onwards.
There can also be a situation that when power down...
The LCD is working fine, but not displaying characters in a proper manner
e.g.
ELECTRONICS IS DISPLAYED AS "EMECUSOOICS"
MOST OF THE CHARACTERS ARE NOT DISPLAYED.
I dont know what to do..
please help.
Thank you for your reply..
The current situation is that the LCD has started working, but the characters are not being the displayed in the proper way.
example:- T in displayed as U on the lcd
Various other characters are also being displayed in the same way..
Where is the problem...
Hey I am also facing the same problem, the LCD shows only the black boxes on line 1 and nothing on line 2
Port 3 I have connected RS, E, RW. (0,1,2)
The data are connected on port 1
The LCD is not working, i dont know wht to do.
I am using Philips 89v51rd2, and SDCC compiler.
Please Help me
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