Initializing the Microcontroller

Tools needed for programming the Power-Failure-Logger:

USBTiny or USBasp Programmer (refer to AVRDude Class for more information on Programmers)
 Any RS232 to USB interface. I used the Silicon Labs Prolific CP210x USB to UART Bridge. 
 Digital volt meter  

Setting up the ATMega328 chip

 Unplug any USB Power before programming the Microcontroller. 
 Plug the USBTiny Programmer into the AVR-ISP 6 pin header J7.
 Place the jumper across J8 to use the USBTiny 5 volt power. Make sure no other power source is connected!  
 Using AVRDUDE Validate the USBTiny is communicating with the Power Fail Module Microcontroller
 
 avrdude -c usbtiny -p m328p -v
 
 Trouble shooting any connection issues to the microcontroller refer back to the AVRDude Class. The link is below.  
 
 The Microcontroller is set to 1HMz and needs to be changed to 16 MHz Default
 Using AVRDude enter the follow command to set the fuse bits on the Microcontroller.
 
 
 avrdude -p m328p -c usbtiny -v -U lfuse:w:0xFF:m -U hfuse:w:0xDE:m -U efuse:w:0xFF:m  
 
 When completed make sure the microcontroller matches these settings:

 avrdude: safemode: hfuse reads as DE
 avrdude: safemode: efuse reads as FF
 avrdude: safemode: Fuses OK (E:FF, H:DE, L:FF)
 avrdude done.  Thank you.

 
 For more information about using AVRDude refer back to this link 
 ==AVRDUDE Class==

Next step Setting up the DS3231 RTC

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