Budget:	$ 100-300
Status:	Closed for Bidding (selected user phoenixmicro)
Project Creator:	sdeluca
	Rating: (No Feedback Yet)
Required Skills:	C++ / C, Circuit Design, Digital, Electronic
Attached Files:	(None)

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Description
Software driver for RTC DS32B35 connected to PIC 16F689.

The required program must be written in C for the PIC 16F689, preferably compatible with CCS C compiler.
It will have the followings specifications:
To read the logical state of 4 input pins
To interface the RTC DS32B35 to read the date and current time, setup of date and hour. To read, to write the data in FRAM inside to the RTC chip.
To communicate with the outside through UART port of PIC
To save in FRAM a log with date, time and minutes of the last 5 events of the 4 inputs pin. They must be saved only if different by 1111
The last event, if different by 1111, must be sent in output in loop through serial port, with a frequency of 2 seconds. The sending will end to the receipt of a of alarm stop message by serial port.
It will need to define a communication protocol that will allow the interaction with the outside, sending and receiving commands through the PIC UART
Whose commands must allow:
Reading of current date and time
RTC Configuration
Alarms RTC set and reset
Reading data in FRAM
Writing data in FRAM
Clear FRAM data
Reading of logical state of the 4 inputs pin of the PIC
Reading log state of the 4 inputs pin of the PIC. the log of the last 5 events must be written in FRAM combined to the date and hour
To send in loop the binary value of 4 pins, combined to date, hour and minutes of the last log, different by 1111. It will go out of the loop to the receipt from UART, of a message of alarm stop.
Will be required the schematic about the connections of RTC DS32B35 and the PIC 16F689
A sample code to drive the RTC (DS32B35) using a 8051-type microcontroller, it’s available at http://www.maxim-ic.com/images/appnotes/3974/3974Program.txt

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