raushankumar586
Junior Member level 1
Hello Embedded geeks,
let me tell you first what I am trying to do , I have a pic18f4520 uc, an arduino mega 2560 board , A 555 timer chip and DS1307 RTC chip .
my work desire a RTC to keep track of my states and synchronization purpose, so I thought to use RTC chip DS1307 but I didn't had Crystal Oscilator of freq 32KHz thats why I genarated the signal from 555 timer of around 32 khz with 50% duty cycle.
I am having i2c connection between pic,arduino and RTC chip where PIC as a master and other two are slave. I am reading RTC output through pic and writing to Arduino2560 for cross checking, but seconds value is jumping with some periods, i don't know why,
its jumping like this .....
1-2-3-4-5-....9-16-17......-25-32-33-34......41-48-49-50......57-64-65......73-80-81....89-0
jumping are shown in bold, and as you can see its counting from 0-89 how that is happening , can somebody help me out.
let me tell you first what I am trying to do , I have a pic18f4520 uc, an arduino mega 2560 board , A 555 timer chip and DS1307 RTC chip .
my work desire a RTC to keep track of my states and synchronization purpose, so I thought to use RTC chip DS1307 but I didn't had Crystal Oscilator of freq 32KHz thats why I genarated the signal from 555 timer of around 32 khz with 50% duty cycle.
I am having i2c connection between pic,arduino and RTC chip where PIC as a master and other two are slave. I am reading RTC output through pic and writing to Arduino2560 for cross checking, but seconds value is jumping with some periods, i don't know why,
its jumping like this .....
1-2-3-4-5-....9-16-17......-25-32-33-34......41-48-49-50......57-64-65......73-80-81....89-0
jumping are shown in bold, and as you can see its counting from 0-89 how that is happening , can somebody help me out.
