Hi,
I am trying to set up the date time of the DS1306 Real Time Clock. I am using the source code from here: http://www.nearfuturelaboratory.com/2006/12/14/arduino-and-ds1306-real-time-clock/.
I changed it a little bit to save the current date and time.
What I added is this on the setup section:
//set datetime
write_rtc_register(0x80, 0x00); // set seconds
write_rtc_register(0x81, 0x45); // set the minutes
write_rtc_register(0x82, 0x11); // set hours
write_rtc_register(0x83, 0x07); // monday = 1...etc
write_rtc_register(0x84, 0x08); // set date
write_rtc_register(0x85, 0x05); // month
write_rtc_register(0x86, 0x11); // year 00-99
| DS1306 |
Arduino |
| Pins 1,8 |
GND |
| Pins 16,14,9 |
5V |
| Pin 2 |
3V |
| Pin 3,4 |
Crystal |
| Pin SDO,SDI,SCLK |
Pins 12,11,13 |
| Pin 10 |
Pin 6 |
| Pin 6(+10k in Vcc) |
Pin 3 |
But the output in the serial monitor just throw zeros...
write_rtc_register(0x82, 0x11); // set hours
Since 0x11 is 17, that may not be valid, if the input is limited to 0 to 11.
write_rtc_register(0x81, 0x45); // set the minutes
0x45 is 69 in base 10. Not too many hours have 69 minutes.
I am using the source code from here
I changed it a little bit to save the current date and time.
What I added is this on the setup section:
Are you sure that the register addresses you specified are valid?
I used the data sheet to see which register I need to look at.
The output error is the following:
CTRL REG [FFFFFFFF]
STATUS REG [11111111111111111111111111000010]
YEAR [FFFFFFFF]
MONTH [5F]
sec alarm is FF SECS=FF MINS=FF HRS=C1
That site you linked to is a perfect example of how not to develop a web site. I can't read a damned thing on that page. Sorry I can't help you.
That site you linked to is a perfect example of how not to develop a web site. I can't read a damned thing on that page. Sorry I can't help you.
It probably looks really nice on his monitor with his browser. He must be fairly young as well judging from the font size.
Don
write_rtc_register(0x82, 0x11); // set hours
Since 0x11 is 17, that may not be valid, if the input is limited to 0 to 11.
write_rtc_register(0x81, 0x45); // set the minutes
0x45 is 69 in base 10. Not too many hours have 69 minutes.
I think these may be OK, the RTC stores it's data in binary coded decimal format.
Don
PaulS:
That site you linked to is a perfect example of how not to develop a web site. I can't read a damned thing on that page. Sorry I can't help you.
Arrrgh! My eyes!
Honestly, it's almost impossible to read the code, and the download link is not valid. But anyway, in what I can barely make out is the source is this:
// ATMega8 Code
// ATMega8 Code
#define DATAOUT 11 //MOSI
#define DATAIN 12 //MISO
#define SPICLOCK 13 //sck
#define RTC_CHIPSELECT 7 // chip select (ss/ce) for RTC, active high
#define LED 10
You had:
DS1306 Arduino
Pins 1,8 GND
Pins 16,14,9 5V
Pin 2 3V
Pin 3,4 Crystal
Pin SDO,SDI,SCLK Pins 12,11,13
Pin 10 Pin 6
Pin 6(+10k in Vcc) Pin 3
You have Chip Enable (pin 10 on the device) connected to pin 6, but the code requires pin 7.
If that isn't the answer, how about posting the whole sketch?