RTCC

Description:

This code example aims to demonstrate the basic initialisation and operation of the Real Time Clock and Calender (RTCC) module. The user has to ensure the presence of a 32.768kHz secondary oscillator for the module to function as desired.

void RTCCUnlock(void)
This function enables the time and date value registers to be written

void RtccInit(void)
This function initialises the time and date registers to the user defined values

void RtccRead(void)
This function enables the time and date registers to be read

void __attribute__((interrupt, no_auto_psv)) _RTCCInterrupt(void)
This is the Interrupt Service Routine of the RTCC module

User selected bit fields:

I]ALARM CONFIGURATIONS:

1. CHIME - Enabled/Disabled
2. AMASK<3:0> - Alarm Mask Configuration
3. ARPT<7:0> - Alarm Repeat Counter Value

II]RTCC VALUE REGISTERS:

1. RTCVAL

III]ALARM VALUE REGISTERS:

1. ALRMVAL

IV]RTCC CALIBRATION:

1.CAL<7:0> - Calibration is provided to compensate the nominal crystal frequency and for variations in the external crystal frequency over temperature.

            Slow clock: Add counts
        Fast clock: Subtract counts  

Hardware Used

• Explorer 16/32 Development Board (https://www.microchip.com/DM240001-2)
• dsPIC33EP512GM710 PIM (https://www.microchip.com/ma330035) or dsPIC33EP512MU810 PIM (https://www.microchip.com/MA330025-1)

Software Used

• MPLAB® X IDE v6.00 or newer (https://www.microchip.com/mplabx)
• MPLAB® XC16 v2.00 or newer (https://www.microchip.com/xc)