Hebemabo
- 14th August 2018, 13:19
PIC16F628, Pic Basic Pro 2.60, Pickit programmer
Good day ,
Below is my code to read the PCF8563:
I2Cread SDA,SCL,rtcadd,rtcloc,[secs,minu,hrs,DoM,doW,mon,year]
gosub waita 'read D&T data then wait 10ms
write $20,secs,minu,hrs, DoM,doW,mon,year 'write D&T data to F628 eeprom
When I read the data in the F628 eeprom I get correct minutes seconds and hours but the DoM,dOW,mon,year
data is corrupt. Every time I run that code the calendar data changes to something different and sometimes
some of the data is correct.
When I set alarms they work correctly.
When I replace the PCF8563 with a DS1307 and change the addresses accordingly, the program works perfectly.
I want to use this PCF8563 because it has alarms and battery voltage sensing that the DS1307 doesn't have.
I have also tried 3k3 resistors on SCL & SDA instead of 4k7 but that made no difference.
Can somebody help please.
Good day ,
Below is my code to read the PCF8563:
I2Cread SDA,SCL,rtcadd,rtcloc,[secs,minu,hrs,DoM,doW,mon,year]
gosub waita 'read D&T data then wait 10ms
write $20,secs,minu,hrs, DoM,doW,mon,year 'write D&T data to F628 eeprom
When I read the data in the F628 eeprom I get correct minutes seconds and hours but the DoM,dOW,mon,year
data is corrupt. Every time I run that code the calendar data changes to something different and sometimes
some of the data is correct.
When I set alarms they work correctly.
When I replace the PCF8563 with a DS1307 and change the addresses accordingly, the program works perfectly.
I want to use this PCF8563 because it has alarms and battery voltage sensing that the DS1307 doesn't have.
I have also tried 3k3 resistors on SCL & SDA instead of 4k7 but that made no difference.
Can somebody help please.