I bought an RTC module from China, which can provide the real date and time for the Raspberry Pi at each start-up. I remembered that it had a DS13..whatever chip in it, so i googled it and found that it's name was DS1307 and uses I2C protocol. So i created a connection on the panel for the RTC module on the I2C bus.
After I connected the module and it did not work, i realized that it has a DS1302 chip on it, which does not use I2C, but some special protocol. I had to hack the panel, some re-soldering, but luckily there was two more pins on the Raspberry pi, which were not yet connected.
i found a sample code on: http://www.zedt.eu/tech/hardware/using-ds1302-real-time-clock-module-raspberry-pi/. After integrating the code to my project the module worked fine:
09:44:03 : [RTC ] - - 265: | > setSystemTime ()
09:44:03 : [RTC ] - - 297: | | . setSystemTime (time set: 2015-02-26 14:46:08)
14:46:08 : [RTC ] - - 314: | < setSystemTime ()
After I connected the module and it did not work, i realized that it has a DS1302 chip on it, which does not use I2C, but some special protocol. I had to hack the panel, some re-soldering, but luckily there was two more pins on the Raspberry pi, which were not yet connected.
i found a sample code on: http://www.zedt.eu/tech/hardware/using-ds1302-real-time-clock-module-raspberry-pi/. After integrating the code to my project the module worked fine:
09:44:03 : [RTC ] - - 265: | > setSystemTime ()
09:44:03 : [RTC ] - - 297: | | . setSystemTime (time set: 2015-02-26 14:46:08)
14:46:08 : [RTC ] - - 314: | < setSystemTime ()
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