PIC18 LaurTec Library  3.3.1
Open Source C Library for PIC18 Microcontrollers based on C18 - XC8 Compilers
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MCP7940.h File Reference
#include <i2c.h>

Go to the source code of this file.

Macros

#define RTCC_WRITE_ADD   0b11011110
 
#define RTCC_DO   0x00
 
#define RTCC_LU   0x01
 
#define RTCC_MA   0x02
 
#define RTCC_ME   0x03
 
#define RTCC_GI   0x04
 
#define RTCC_VE   0x05
 
#define RTCC_SA   0x06
 
#define RTCC_SU   0x00
 
#define RTCC_MO   0x01
 
#define RTCC_TU   0x02
 
#define RTCC_WE   0x03
 
#define RTCC_TR   0x04
 
#define RTCC_FR   0x05
 
#define RTCC_SA   0x06
 
#define RTCC_ENABLE_ON   0b00000000
 
#define RTCC_ENABLE_OFF   0b10000000
 
#define RTCC_SECONDS_ADDR   0x00
 
#define RTCC_MINUTES_ADDR   0x01
 
#define RTCC_HOURS_ADDR   0x02
 
#define RTCC_DAYS_ADDR   0x04
 
#define RTCC_MONTHS_ADDR   0x05
 
#define RTCC_YEARS_ADDR   0x06
 
#define RTCC_SECONDS_ALARM_ADDR   0x0A
 
#define RTCC_MINUTS_ALARM_ADDR   0x0B
 
#define RTCC_HOURS_ALARM_ADDR   0x0C
 
#define RTCC_DAYS_ALARM_ADDR   0x0E
 
#define RTCC_SECONDS_ALARM_2_ADDR   0x11
 
#define RTCC_MINUTS_ALARM_2_ADDR   0x12
 
#define RTCC_HOURS_ALARM_2_ADDR   0x13
 
#define RTCC_DAYS_ALARM_2_ADDR   0x15
 
#define RTCC_CONFIGURATION_REG_ADDR   0x07
 
#define RTCC_ALARM_CONTROL_REG_1_ADDR   0x0D
 
#define RTCC_ALARM_CONTROL_REG_2_ADDR   0x14
 
#define RTCC_MAX_MINUTES   0x60
 
#define RTCC_MAX_HOURS   0x24
 
#define RTCC_MAX_YEARS   0xA0
 
#define RTCC_MAX_MONTHS   0x13
 
#define RTCC_MAX_DAYS   0x32
 
#define initialize_MCP7940   MCP7940_initialize
 
#define set_seconds_RTCC   RTCC_set_seconds
 
#define get_seconds_RTCC   RTCC_get_seconds
 
#define set_minutes_RTCC   RTCC_set_minutes
 
#define get_minutes_RTCC   RTCC_get_minutes
 
#define set_hours_RTCC   RTCC_set_hours
 
#define get_hours_RTCC   RTCC_get_hours
 
#define get_time_seconds_RTCC   RTCC_get_time_seconds
 
#define get_time_RTCC   RTCC_get_time
 
#define set_days_RTCC   RTCC_set_days
 
#define get_days_RTCC   RTCC_get_days
 
#define set_months_RTCC   RTCC_set_months
 
#define get_months_RTCC   RTCC_get_months
 
#define set_years_RTCC   RTCC_set_years
 
#define get_years_RTCC   RTCC_get_years
 
#define get_date_RTCC   RTCC_get_date
 
#define set_seconds_alarm_RTCC   RTCC_set_seconds_alarm
 
#define set_minutes_alarm_RTCC   RTCC_set_minutes_alarm
 
#define set_hours_alarm_RTCC   RTCC_set_hours_alarm
 
#define set_days_alarm_RTCC   RTCC_set_days_alarm
 
#define enable_alarm_interrupt_RTCC   RTCC_enable_alarm_interrupt
 
#define disable_alarm_interrupt_RTCC   RTCC_disable_alarm_interrupt
 
#define is_alarm_ON_RTCC   RTCC_is_alarm_ON
 
#define increment_minutes_RTCC   RTCC_increment_minutes
 
#define increment_hours_RTCC   RTCC_increment_hours
 
#define increment_years_RTCC   RTCC_increment_years
 
#define increment_months_RTCC   RTCC_increment_months
 
#define increment_days_RTCC   RTCC_increment_days
 

Functions

void MCP7940_initialize (unsigned char crystal_frequency_MHz, unsigned int baud_rate_KHz)
 
signed char RTCC_set_seconds (unsigned char seconds)
 
unsigned char RTCC_get_seconds (void)
 
signed char RTCC_set_minutes (unsigned char minutes)
 
unsigned char get_minutes_RTCC (void)
 
signed char RTCC_set_hours (unsigned char hours)
 
unsigned char RTCC_get_hours (void)
 
unsigned char * RTCC_get_time_seconds (void)
 
unsigned char * RTCC_get_time (void)
 
signed char RTCC_set_days (unsigned char days)
 
unsigned char RTCC_get_days (void)
 
signed char RTCC_set_months (unsigned char months)
 
unsigned char RTCC_get_months (void)
 
signed char RTCC_set_years (unsigned char years)
 
unsigned char RTCC_get_years (void)
 
unsigned char * RTCC_get_date (void)
 
signed char RTCC_set_seconds_alarm (unsigned char seconds, unsigned char alarm_enable)
 
signed char RTCC_set_minutes_alarm (unsigned char minutes, unsigned char alarm_enable)
 
signed char RTCC_set_hours_alarm (unsigned char hours, unsigned char alarm_enable)
 
signed char RTCC_set_days_alarm (unsigned char days, unsigned char alarm_enable)
 
signed char RTCC_enable_alarm_interrupt (void)
 
signed char RTCC_disable_alarm_interrupt (void)
 
unsigned char RTCC_is_alarm_ON (void)
 
signed char RTCC_increment_minutes (void)
 
signed char RTCC_increment_hours (void)
 
signed char RTCC_increment_years (void)
 
signed char RTCC_increment_months (void)
 
signed char RTCC_increment_days (void)
 

Macro Definition Documentation

#define disable_alarm_interrupt_RTCC   RTCC_disable_alarm_interrupt

Definition at line 450 of file MCP7940.h.

#define enable_alarm_interrupt_RTCC   RTCC_enable_alarm_interrupt

Definition at line 436 of file MCP7940.h.

#define get_date_RTCC   RTCC_get_date

Definition at line 344 of file MCP7940.h.

#define get_days_RTCC   RTCC_get_days

Definition at line 277 of file MCP7940.h.

#define get_hours_RTCC   RTCC_get_hours

Definition at line 230 of file MCP7940.h.

#define get_minutes_RTCC   RTCC_get_minutes

Definition at line 203 of file MCP7940.h.

#define get_months_RTCC   RTCC_get_months

Definition at line 305 of file MCP7940.h.

#define get_seconds_RTCC   RTCC_get_seconds

Definition at line 177 of file MCP7940.h.

#define get_time_RTCC   RTCC_get_time

Definition at line 250 of file MCP7940.h.

#define get_time_seconds_RTCC   RTCC_get_time_seconds

Definition at line 240 of file MCP7940.h.

#define get_years_RTCC   RTCC_get_years

Definition at line 333 of file MCP7940.h.

#define increment_days_RTCC   RTCC_increment_days

Definition at line 538 of file MCP7940.h.

#define increment_hours_RTCC   RTCC_increment_hours

Definition at line 492 of file MCP7940.h.

#define increment_minutes_RTCC   RTCC_increment_minutes

Definition at line 477 of file MCP7940.h.

#define increment_months_RTCC   RTCC_increment_months

Definition at line 522 of file MCP7940.h.

#define increment_years_RTCC   RTCC_increment_years

Definition at line 507 of file MCP7940.h.

#define initialize_MCP7940   MCP7940_initialize

Definition at line 150 of file MCP7940.h.

#define is_alarm_ON_RTCC   RTCC_is_alarm_ON

Definition at line 462 of file MCP7940.h.

#define RTCC_ALARM_CONTROL_REG_1_ADDR   0x0D

Definition at line 122 of file MCP7940.h.

#define RTCC_ALARM_CONTROL_REG_2_ADDR   0x14

Definition at line 123 of file MCP7940.h.

#define RTCC_CONFIGURATION_REG_ADDR   0x07

Definition at line 121 of file MCP7940.h.

#define RTCC_DAYS_ADDR   0x04

Definition at line 110 of file MCP7940.h.

#define RTCC_DAYS_ALARM_2_ADDR   0x15

Definition at line 120 of file MCP7940.h.

#define RTCC_DAYS_ALARM_ADDR   0x0E

Definition at line 116 of file MCP7940.h.

#define RTCC_DO   0x00

Definition at line 75 of file MCP7940.h.

#define RTCC_ENABLE_OFF   0b10000000

Definition at line 100 of file MCP7940.h.

#define RTCC_ENABLE_ON   0b00000000

Definition at line 99 of file MCP7940.h.

#define RTCC_FR   0x05

Definition at line 89 of file MCP7940.h.

#define RTCC_GI   0x04

Definition at line 79 of file MCP7940.h.

#define RTCC_HOURS_ADDR   0x02

Definition at line 109 of file MCP7940.h.

#define RTCC_HOURS_ALARM_2_ADDR   0x13

Definition at line 119 of file MCP7940.h.

#define RTCC_HOURS_ALARM_ADDR   0x0C

Definition at line 115 of file MCP7940.h.

#define RTCC_LU   0x01

Definition at line 76 of file MCP7940.h.

#define RTCC_MA   0x02

Definition at line 77 of file MCP7940.h.

#define RTCC_MAX_DAYS   0x32

Definition at line 132 of file MCP7940.h.

#define RTCC_MAX_HOURS   0x24

Definition at line 129 of file MCP7940.h.

#define RTCC_MAX_MINUTES   0x60

Definition at line 128 of file MCP7940.h.

#define RTCC_MAX_MONTHS   0x13

Definition at line 131 of file MCP7940.h.

#define RTCC_MAX_YEARS   0xA0

Definition at line 130 of file MCP7940.h.

#define RTCC_ME   0x03

Definition at line 78 of file MCP7940.h.

#define RTCC_MINUTES_ADDR   0x01

Definition at line 108 of file MCP7940.h.

#define RTCC_MINUTS_ALARM_2_ADDR   0x12

Definition at line 118 of file MCP7940.h.

#define RTCC_MINUTS_ALARM_ADDR   0x0B

Definition at line 114 of file MCP7940.h.

#define RTCC_MO   0x01

Definition at line 85 of file MCP7940.h.

#define RTCC_MONTHS_ADDR   0x05

Definition at line 111 of file MCP7940.h.

#define RTCC_SA   0x06

Definition at line 90 of file MCP7940.h.

#define RTCC_SA   0x06

Definition at line 90 of file MCP7940.h.

#define RTCC_SECONDS_ADDR   0x00

Definition at line 107 of file MCP7940.h.

#define RTCC_SECONDS_ALARM_2_ADDR   0x11

Definition at line 117 of file MCP7940.h.

#define RTCC_SECONDS_ALARM_ADDR   0x0A

Definition at line 113 of file MCP7940.h.

#define RTCC_SU   0x00

Definition at line 84 of file MCP7940.h.

#define RTCC_TR   0x04

Definition at line 88 of file MCP7940.h.

#define RTCC_TU   0x02

Definition at line 86 of file MCP7940.h.

#define RTCC_VE   0x05

Definition at line 80 of file MCP7940.h.

#define RTCC_WE   0x03

Definition at line 87 of file MCP7940.h.

#define RTCC_WRITE_ADD   0b11011110

Definition at line 68 of file MCP7940.h.

#define RTCC_YEARS_ADDR   0x06

Definition at line 112 of file MCP7940.h.

#define set_days_alarm_RTCC   RTCC_set_days_alarm

Definition at line 422 of file MCP7940.h.

#define set_days_RTCC   RTCC_set_days

Definition at line 266 of file MCP7940.h.

#define set_hours_alarm_RTCC   RTCC_set_hours_alarm

Definition at line 403 of file MCP7940.h.

#define set_hours_RTCC   RTCC_set_hours

Definition at line 219 of file MCP7940.h.

#define set_minutes_alarm_RTCC   RTCC_set_minutes_alarm

Definition at line 383 of file MCP7940.h.

#define set_minutes_RTCC   RTCC_set_minutes

Definition at line 193 of file MCP7940.h.

#define set_months_RTCC   RTCC_set_months

Definition at line 294 of file MCP7940.h.

#define set_seconds_alarm_RTCC   RTCC_set_seconds_alarm

Definition at line 364 of file MCP7940.h.

#define set_seconds_RTCC   RTCC_set_seconds

Definition at line 166 of file MCP7940.h.

#define set_years_RTCC   RTCC_set_years

Definition at line 322 of file MCP7940.h.

Function Documentation

unsigned char get_minutes_RTCC ( void  )

This function reads the minutes from the RTC.

Returns
Minutes that are read back, in BCD format (eg. 22 min. is 0x22 or 0b00100010).
Note
Seconds are in BCD format.
void MCP7940_initialize ( unsigned char  crystal_frequency_MHz,
unsigned int  baud_rate_KHz 
)

This function initialize the I2C module accordingly to the clock and baud rate.

Parameters
crystal_frequency_MHzClock frequency expressed in MHz
baud_rate_KHzBaud rate expressed in KHz
Returns
Note
If other devices are connected on the I2C bus the baud rate would be changed by the function. Among several calls from different device initializations, only the last one will be reflected in the I2C module configuration.

Definition at line 63 of file MCP7940.c.

References RTCC_set_seconds().

signed char RTCC_disable_alarm_interrupt ( void  )

This function disable the interrupt pin functionality.

Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision

Definition at line 357 of file DS1337.c.

signed char RTCC_enable_alarm_interrupt ( void  )

This function enables the interrupt pin functionality.

Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision

Definition at line 344 of file DS1337.c.

unsigned char* RTCC_get_date ( void  )

This function reads the Date from the RTC. The Format DD/MM/YY

Returns
Date that is read back, as ASCII string terminated with /0

Definition at line 262 of file DS1337.c.

unsigned char RTCC_get_days ( void  )

This function reads the day from the RTC.

Returns
Days that are read back, in BCD format (eg. 12 is 0x12 or 0b00010010).
Note
Days are in BCD format.

Definition at line 204 of file DS1337.c.

unsigned char RTCC_get_hours ( void  )

This function reads the hours from the RTC.

Returns
Hours that are read back, in BCD format (eg. 12 is 0x12 or 0b00010010).
Note
Hours are in BCD format.

Definition at line 120 of file DS1337.c.

unsigned char RTCC_get_months ( void  )

This function reads the months from the RTC.

Returns
Months that are read back, in BCD format (eg. 12 is 0x12 or 0b00010010).
Note
Months are in BCD format.

Definition at line 228 of file DS1337.c.

unsigned char RTCC_get_seconds ( void  )

This function reads the second from the RTC.

Returns
Second that are read back, in BCD format (eg. 22 sec. is 0x22 or 0b00100010).
Note
Seconds are in BCD format.

Definition at line 70 of file DS1337.c.

unsigned char* RTCC_get_time ( void  )

This function reads the time from the RTC. The format is HH:MM (without seconds)

Returns
Time that is read back, as ASCII string terminated with /0

Definition at line 167 of file DS1337.c.

unsigned char* RTCC_get_time_seconds ( void  )

This function reads the time from the RTC. The format is HH:MM.ss

Returns
Time that is read back, as ASCII string terminated with /0

Definition at line 134 of file DS1337.c.

unsigned char RTCC_get_years ( void  )

This function reads the Year from the RTC.

Returns
Year that is read back, in BCD format (eg. 12 is 0x12 or 0b00010010 represents 2012).
Note
Year are in BCD format. 2012 is read as 0x12.

Definition at line 251 of file DS1337.c.

signed char RTCC_increment_days ( void  )

This function increments the Days inside the RTCC.

Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Note
The function automatically checks the overflow.

Definition at line 530 of file DS1337.c.

signed char RTCC_increment_hours ( void  )

This function increments the hours inside the RTCC.

Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Note
The function automatically checks the overflow.

Definition at line 426 of file DS1337.c.

signed char RTCC_increment_minutes ( void  )

This function increments the minutes inside the RTCC.

Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Note
The function automatically checks the overflow and automatically increments the hours.

Definition at line 391 of file DS1337.c.

signed char RTCC_increment_months ( void  )

This function increments the Months inside the RTCC.

Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Note
The function automatically checks the overflow.

Definition at line 496 of file DS1337.c.

signed char RTCC_increment_years ( void  )

This function increments the Years inside the RTCC.

Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Note
The function automatically checks the overflow.

Definition at line 461 of file DS1337.c.

unsigned char RTCC_is_alarm_ON ( void  )

This function checks if the Alarm id ON using polling method.

Returns
status Alarm status 1: ON 0:OFF
Note
If the alarm is on, AF flag is automatically cleaned.

Definition at line 367 of file DS1337.c.

signed char RTCC_set_days ( unsigned char  days)

This function writes the days in the RTC.

Parameters
daysDay to be written, as 2 digits BCD format (eg. 12 is 0x12 or 0b00010010).
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Days are in BCD format. Decimal format won't work!

Definition at line 195 of file DS1337.c.

signed char RTCC_set_days_alarm ( unsigned char  days,
unsigned char  alarm_enable 
)

This function writes the Days for the alarm, in the RTC.

Parameters
daysDays to be written, as 2 digits BCD format (eg. 12 is 0x12 or 0b00010010).
alarmEnableEnable the alarm or not (for matching) [ENABLE_ON , ENABLE_OFF]
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Days are in BCD format. Decimal format won't work!
Note
Use the constants ENABLE_ON and ENABLE_OFF

Definition at line 332 of file DS1337.c.

signed char RTCC_set_hours ( unsigned char  hours)

This function writes the hours in the RTC.

Parameters
hoursHours to be written, as 2 digits BCD format (eg. 12 is 0x12 or 0b00010010).
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Hours are in BCD format. Decimal format won't work!

Definition at line 111 of file DS1337.c.

signed char RTCC_set_hours_alarm ( unsigned char  hours,
unsigned char  alarm_enable 
)

This function writes the hours for the alarm, in the RTC.

Parameters
hoursHours to be written, as 2 digits BCD format (eg. 12 is 0x12 or 0b00010010).
alarmEnableEnable the alarm or not (for matching) [ENABLE_ON , ENABLE_OFF]
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Hours are in BCD format. Decimal format won't work!
Note
Use the constants ENABLE_ON and ENABLE_OFF

Definition at line 321 of file DS1337.c.

signed char RTCC_set_minutes ( unsigned char  minutes)

This function writes the seconds in the RTC.

Parameters
minutesMinutes to be written, as 2 digits BCD format (eg. 22 min. is 0x22 or 0b00100010).
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Minutes are in BCD format. Decimal format won't work!

Definition at line 87 of file DS1337.c.

signed char RTCC_set_minutes_alarm ( unsigned char  minutes,
unsigned char  alarm_enable 
)

This function writes the minutes for the alarm, in the RTC.

Parameters
minutesMinutes to be written, as 2 digits BCD format (eg. 12 is 0x12 or 0b00010010).
alarmEnableEnable the alarm or not (for matching) [ENABLE_ON , ENABLE_OFF]
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Minutes are in BCD format. Decimal format won't work!
Note
Use the constants ENABLE_ON and ENABLE_OFF

Definition at line 308 of file DS1337.c.

signed char RTCC_set_months ( unsigned char  months)

This function writes the moths in the RTC.

Parameters
monthsMonths to be written, as 2 digits BCD format (eg. 12 is 0x12 or 0b00010010).
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Months are in BCD format. Decimal format won't work!

Definition at line 218 of file DS1337.c.

signed char RTCC_set_seconds ( unsigned char  seconds)

This function writes the seconds in the RTC.

Parameters
secondsSeconds to be written, as 2 digits BCD format (eg. 22 sec. is 0x22 or 0b00100010).
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Seconds are in BCD format. Decimal format won't work!

Definition at line 60 of file DS1337.c.

signed char RTCC_set_seconds_alarm ( unsigned char  seconds,
unsigned char  alarm_enable 
)

This function writes the seconds for the alarm, in the RTC.

Parameters
secondsSeconds to be written, as 2 digits BCD format (eg. 12 is 0x12 or 0b00010010).
alarmEnableEnable the alarm or not (for matching) [ENABLE_ON , ENABLE_OFF]
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Seconds are in BCD format. Decimal format won't work!
Note
Use the constants ENABLE_ON and ENABLE_OFF

Definition at line 296 of file DS1337.c.

References RTCC_ALARM_CONTROL_REG_1_ADDR, RTCC_ENABLE_ON, RTCC_SECONDS_ALARM_ADDR, and RTCC_WRITE_ADD.

signed char RTCC_set_years ( unsigned char  years)

This function writes the Year in the RTC.

Parameters
yearsYear to be written, as 2 digits BCD format (eg. 2012 is only 0x12 or 0b00010010).
Returns
status 1: The info has been properly written -1: Bus Collision error -2: Not Ack error condition -3: Write collision
Warning
Years are in BCD format. Decimal format won't work!
Note
2012 is written as 12.

Definition at line 242 of file DS1337.c.