Moving Message Display

kvns.kapil · Oct 11, 2010

Hi,
I am new to Embedded programming, My project is about moving message display in which i am using PIC 16F877A, 5x7 dot matrix display, DS1307 RTC.
Already the program is written for this project, i wanted to change time from 24 hour format to 12 hour format. I am sending that code in attached file, please verify this one and suggest me the modifications.
Please help me for this code...
thanks...

n1ist · Oct 11, 2010

According to the DS1307 data sheet,

The DS1307 can be run in either 12-hour or 24-hour mode. Bit 6 of the hours register is defined as the 12-hour or
24-hour mode-select bit. When high, the 12-hour mode is selected. In the 12-hour mode, bit 5 is the AM/PM bit with
logic high being PM.
Click to expand...

So whenever you set the hours, or in 0x40. Whenever you read the hours, use bit 5 do decide whether to show "AM" or "PM".
/mike

kvns.kapil · Oct 12, 2010

Hi,
I had changed bit 6 to high but i could not get the 12 hour mode, please could you modify the code and send me please.....

kvns.kapil · Oct 14, 2010

n1ist said: ↑

According to the DS1307 data sheet,

So whenever you set the hours, or in 0x40. Whenever you read the hours, use bit 5 do decide whether to show "AM" or "PM".
/mike
Click to expand...

Hello sir,
how to set the bits to show "AM" or "PM"

Moving Message Display

kvns.kapil Thread Starter New Member

DS1307.pdf

ledmatrix10digit.txt

n1ist Senior Member

kvns.kapil Thread Starter New Member

kvns.kapil Thread Starter New Member

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