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main.c(75): error C202: 'EXTRAM': undefined identifier
I can´t see an internal EEPROM.
V0 other than "010" may cause errors in time. Hi,
Pleas confirm, that the time error is continous and not jumping.
(I mean if it is 60s per day it should be continously 2.5s per hour)
I can´t see an internal EEPROM.
You may READ register A to check if clock is initialized.
Take care when writing to register A.
Best: Never write to this register. Only at the very first time to start the clock.
An incidentally change in DV2
Also datasheet says:
Also, don´t write to the time / date registers, only when you want to set time. (once in half a year).
Klaus
void RTC_init(void){
XBYTE[10] = 0x20; //turn on OSC
XBYTE[11] = 0x92; //BCD ,24h ,no dayLight savings
/*initilize*/
XBYTE[0] = 0x00; //seconds =00
XBYTE[2] = INITIAL_MINUTE; //Minute =
XBYTE[4] = INITIAL_HOUR; //HOUR =
XBYTE[6] = 0x03; //day of the weak thursday
XBYTE[7] = INITIAL_DAY; //day of the month 12
XBYTE[8] = 0x11; //month = november
XBYTE[9] = 0x15; //year = 2015
XBYTE[11] = 0x12; //allow update
}
/*****************************************************/
void main()
{
unsigned char hr =0,min =0 ,sec =0,day=0,month=0,year=0;
unsigned char initRTC_state ;
bit disp_f = 0;
delay(250); //RTC needs 200ms upon power-up
AUXR = 0x02;
initRTC_state = __api_rd_eeprom_byte(0x400);
if( initRTC_state != VERSION_NO){
RTC_init(); // use it at the first time only
__api_wr_eeprom_byte(0x400, VERSION_NO);
}
while(1)
{
sec = XBYTE[0];
min = XBYTE[2];
hr = XBYTE[4];
day = XBYTE[7];
month= XBYTE[8];
year = XBYTE[9];
if(disp_f == 0){
display(sec , min , hr);
if(sec == 0x19)
disp_f = 1;
}
else{
display(year ,month ,day);
if(sec == 0x39)
disp_f = 0;
}
}
}