Difference between revisions of "RTC"
| Line 111: | Line 111: | ||
==User Guide== | ==User Guide== | ||
| + | <syntaxhighlight lang = "c"> | ||
| + | /*** Program to demonstrate the RTC library */ | ||
| + | #include "uart.h" //User defined UART library which contains the UART routines | ||
| + | #include "rtc.h" //User defined library which contains the RTC(ds1307) routines | ||
| + | |||
| + | |||
| + | void main() | ||
| + | { | ||
| + | unsigned char sec,min,hour,day,month,year; | ||
| + | |||
| + | |||
| + | UART_Init(9600); /* Initialize the Uart */ | ||
| + | RTC_Init(); /* Initialize the RTC(ds1307)*/ | ||
| + | |||
| + | |||
| + | /******Set the time and Date only once*****/ | ||
| + | RTC_SetTime(0x10,0x40,0x20); // 10:40:20 am | ||
| + | RTC_SetDate(0x01,0x12,0x12); // 1st Dec 2012 | ||
| + | |||
| + | |||
| + | while(1) | ||
| + | { | ||
| + | RTC_GetDate(&day,&month,&year); /* Read the Date from RTC(ds1307) */ | ||
| + | RTC_GetTime(&hour,&min,&sec); /* Read the Time from RTC(ds1307) */ | ||
| + | |||
| + | UART_Printf("\n\rDate:%x/%x/%x Time:%x:%x:%x",day,month,year,hour,min,sec); | ||
| + | } | ||
| + | } | ||
| + | </syntaxhighlight> | ||
Revision as of 11:33, 10 January 2015
Contents
RTC
RTC_Init
| Defination | void RTC_Init() |
| Input Arguments | none |
| Return Value | none |
| Description | This function is used to Initialize the Ds1307 RTC. |
| Usage | RTC_Init(); |
RTC_SetTime
| Defination | void RTC_SetTime(uint8_t var_hour_u8, uint8_t var_min_u8, uint8_t var_sec_u8) |
| Input Arguments | uint8_t: Hour (0x00-0x23) BCD format uint8_t: Minute (0x00-0x59) BCD format uint8_t: Second (0x00-0x59) BCD format |
| Return Value | none |
| Description | This function is used to update the Time(hh,mm,ss) of Ds1307 RTC. The new time is updated into the non volatile memory of Ds1307. Note: The I/P arguments should of BCD, |
| Usage | RTC_SetTime(0x10,0x40,0x20); //All the arguments should be in BCD format |
RTC_SetDate
| Defination | void RTC_SetDate(uint8_t var_day_u8, uint8_t var_month_u8, uint8_t var_year_u8) |
| Input Arguments | uint8_t: Day(0x01-0x31) BCD format uint8_t: Month(0x01-12) BCD format uint8_t: Year(0x00-0x99) BCD format |
| Return Value | none |
| Description | This function is used to set Date(dd,mm,yy) into the Ds1307 RTC. The new Date is updated into the non volatile memory of Ds1307. Note: The I/P arguments should of BCD. |
| Usage | RTC_SetDate(0x15,0x08,0x47); //All arguments should be in BCD format. |
RTC_GetTime
| Defination | void RTC_GetTime(uint8_t *ptr_hour_u8,uint8_t *ptr_min_u8,uint8_t *ptr_sec_u8) |
| Input Arguments | uint8_t *: Address to copy Hour. uint8_t *: Address to copy Minute. uint8_t *: Address to copy Second. |
| Return Value | none |
| Description | This function is used to get the Time(hh,mm,ss) from Ds1307 RTC. Note: The time read from Ds1307 will be of BCD format, |
| Usage | uint8_t hour,min,sec; RTC_GetTime(&hour,&min&sec); //Now the hour,min,sec will have the time in BCD format. |
RTC_GetDate
| Defination | void RTC_GetDate(uint8_t *ptr_day_u8,uint8_t *ptr_month_u8,uint8_t *ptr_year_u8) |
| Input Arguments | uint8_t * : Address to copy Day. uint8_t * : Address to copy Month. uint8_t * : Address to copy Year. |
| Return Value | none |
| Description | This function is used to get the Date(d,m,y) from Ds1307 RTC. Note: The date read from Ds1307 will be of BCD format, |
| Usage | uint8_t hour,min,year; RTC_GetDate(&hour,&min&year); //Now the hour,min,year will have the Date in BCD format. |
User Guide
/*** Program to demonstrate the RTC library */ #include "uart.h" //User defined UART library which contains the UART routines #include "rtc.h" //User defined library which contains the RTC(ds1307) routines void main() { unsigned char sec,min,hour,day,month,year; UART_Init(9600); /* Initialize the Uart */ RTC_Init(); /* Initialize the RTC(ds1307)*/ /******Set the time and Date only once*****/ RTC_SetTime(0x10,0x40,0x20); // 10:40:20 am RTC_SetDate(0x01,0x12,0x12); // 1st Dec 2012 while(1) { RTC_GetDate(&day,&month,&year); /* Read the Date from RTC(ds1307) */ RTC_GetTime(&hour,&min,&sec); /* Read the Time from RTC(ds1307) */ UART_Printf("\n\rDate:%x/%x/%x Time:%x:%x:%x",day,month,year,hour,min,sec); } }