/
rtc.c
684 lines (540 loc) · 18.4 KB
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rtc.c
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/* Note: BCD conversion
Decimal: 0 1 2 3 4 5 6 7 8 9
BCD: 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001
SPI read = addr + data1 + data2
addr = 0XXXXXXX (for read)
= 0x0X hex
SPI write = addr + data
addr = 1XXXXXXX (for write)
= 0x8X hex
*/
int8 RTC_Sec_Reg, RTC_Min_Reg, RTC_Hr_Reg;
int8 RTC_DOW_Reg, RTC_DOM_Reg, RTC_Mon_Reg, RTC_Yr_Reg;
int8 RTC_Tenths_Sec_Reg;
int8 RTC_Al_Yr_Reg, RTC_Al_Mon_Reg, RTC_Al_DOM_Reg;
int8 RTC_Al_Hr_Reg, RTC_Al_Min_Reg, RTC_Al_Sec_Reg;
int8 RTC_Flags_Reg;
int8 RTC_Sec_Data, RTC_Min_Data, RTC_Hr_Data;
int8 RTC_DOM_Data, RTC_Mon_Data, RTC_Yr_Data;
int8 rtc_last_month;
int8 rtc_last_day;
int8 rtc_last_year;
int8 rtc_last_hour;
int8 rtc_last_min;
int8 rtc_last_sec;
short alarm_passed;
int Dec2Bcd(int8 data)
{
int nibh;
int nibl;
nibh=data/10;
nibl=data-(nibh*10);
return((nibh<<4)|nibl);
}
int Bcd2Dec(int8 data)
{
int i;
i=data;
data=(i>>4)*10;
data=data+(i<<4>>4);
return data;
}
// When power failure occurs HT (halt update) is set to 1
// ... preventing the clock from updating registers
// HT must be set to 0 to resume register updates
void RTC_reset_HT()
{
int8 RTC_buffer;
RTC_buffer = 0;
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x0C);
RTC_Al_Hr_Reg = spi_read(RTC_buffer);
output_bit(RTC_CS, DISABLE);
RTC_Al_Hr_Reg = RTC_Al_Hr_Reg & 0b10111111;
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8C); // address - Hour
RTC_buffer = spi_read(RTC_Al_Hr_Reg); // data
output_bit(RTC_CS, DISABLE);
}
void RTC_display()
{
RTCfmt = read16(ADDR_RTCfmt);
if (RTCfmt == 0) // default format MM/DD/YY HH:mm:SS
{
fprintf (COM_A, "@RTC:%02u/", RTC_Mon_Reg);
fprintf (COM_A, "%02u/", RTC_DOM_Reg);
}
if (RTCfmt == 1) // Euro/Asia format DD/MM/YY HH:mm:SS
{
fprintf (COM_A, "@RTC:%02u/", RTC_DOM_Reg);
fprintf (COM_A, "%02u/", RTC_Mon_Reg);
}
fprintf (COM_A, "%02u ", RTC_Yr_Reg);
fprintf (COM_A, "%02u:", RTC_Hr_Reg);
fprintf (COM_A, "%02u:", RTC_Min_Reg);
fprintf (COM_A, "%02u\n\r", RTC_Sec_Reg);
}
void RTC_read()
{
int8 RTC_buffer;
RTC_buffer = 0;
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x00);
RTC_Tenths_Sec_Reg = spi_read(RTC_buffer);
RTC_Sec_Reg = spi_read(RTC_buffer);
RTC_Min_Reg = spi_read(RTC_buffer);
RTC_Hr_Reg = spi_read(RTC_buffer);
RTC_DOW_Reg = spi_read(RTC_buffer);
RTC_DOM_Reg = spi_read(RTC_buffer);
RTC_Mon_Reg = spi_read(RTC_buffer);
RTC_Yr_Reg = spi_read(RTC_buffer);
output_bit(RTC_CS, DISABLE);
RTC_Sec_Reg = Bcd2Dec(RTC_Sec_Reg);
RTC_Min_Reg = Bcd2Dec(RTC_Min_Reg);
RTC_Hr_Reg = Bcd2Dec(RTC_Hr_Reg);
RTC_DOM_Reg = Bcd2Dec(RTC_DOM_Reg);
RTC_Mon_Reg = Bcd2Dec(RTC_Mon_Reg);
RTC_Yr_Reg = Bcd2Dec(RTC_Yr_Reg);
}
// RTC IRQ output is cleared & reset by reading the flags
// ... register
void RTC_read_flags()
{
int8 RTC_buffer;
RTC_buffer = 0;
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x0F);
RTC_Flags_Reg = spi_read(RTC_buffer);
spi_read(0x00);
output_bit(RTC_CS, DISABLE);
RTC_read_flags_running = FALSE;
}
void RTC_display_alarm()
{
if(RTCfmt == 0)
{
fprintf (COM_A, "@ALM:%02u/", RTC_Al_Mon_Reg );
fprintf (COM_A, "%02u/", RTC_Al_DOM_Reg);
}
if(RTCfmt == 1)
{
fprintf (COM_A, "@ALM:%02u/", RTC_Al_DOM_Reg );
fprintf (COM_A, "%02u/", RTC_Al_Mon_Reg);
}
fprintf (COM_A, "%02u ", RTC_Al_Yr_Reg);
fprintf (COM_A, "%02u:", RTC_Al_Hr_Reg);
fprintf (COM_A, "%02u:", RTC_Al_Min_Reg);
fprintf (COM_A, "%02u\n\r", RTC_Al_Sec_Reg);
}
void RTC_read_alarm(){
int8 RTC_buffer;
RTC_buffer = 0;
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x0A);
RTC_Al_Mon_Reg = spi_read(RTC_buffer);
RTC_Al_DOM_Reg = spi_read(RTC_buffer);
RTC_Al_Hr_Reg = spi_read(RTC_buffer);
RTC_Al_Min_Reg = spi_read(RTC_buffer);
RTC_Al_Sec_Reg = spi_read(RTC_buffer);
RTC_Flags_Reg = spi_read(RTC_buffer);
output_bit(RTC_CS, DISABLE);
RTC_Al_Mon_Reg = RTC_Al_Mon_Reg & 0b00011111;
RTC_Al_Mon_Reg = Bcd2Dec(RTC_Al_Mon_Reg);
RTC_Al_DOM_Reg = RTC_Al_DOM_Reg & 0b00111111;
RTC_Al_DOM_Reg = Bcd2Dec(RTC_Al_DOM_Reg);
RTC_Al_Hr_Reg = RTC_Al_Hr_Reg & 0b00111111;
RTC_Al_Hr_Reg = Bcd2Dec(RTC_Al_Hr_Reg);
RTC_Al_Min_Reg = RTC_Al_Min_Reg & 0b01111111;
RTC_Al_Min_Reg = Bcd2Dec(RTC_Al_Min_Reg);
RTC_Al_Sec_Reg = RTC_Al_Sec_Reg & 0b01111111;
RTC_Al_Sec_Reg = Bcd2Dec(RTC_Al_Sec_Reg);
}
int8 get_time2()
{
int8 c, n;
int8 t_entry[12];
int8 time_error;
char input_string[30];
memset (&t_entry[0], 0x00, 12); //blank it
time_error = 0;
fputc('[', COM_A);
for (n=0; n<12; ++n){
c = fgetc(COM_A);
if (com_echo == TRUE)
{
fputc(c, COM_A);
}
if (c > 47 && c < 58) t_entry[n] = c;
else
{
// it's not a number - kick it out
time_error = 1;
break;
}
}
if (time_error == 0){
fputc(']', COM_A);
for (n=0; n<12; ++n){
t_entry[n] = (t_entry[n] - 48);
}
if (RTCfmt == 0)
{
RTC_Mon_Data = (10 * t_entry[0]) + t_entry[1];
if (RTC_Mon_Data < 1 || RTC_Mon_Data > 12) time_error = 2;
RTC_DOM_Data = (10 * t_entry[2]) + t_entry[3];
if (RTC_DOM_Data < 1 || RTC_DOM_Data > 31) time_error = 2;
}
if (RTCfmt == 1)
{
RTC_DOM_Data = (10 * t_entry[0]) + t_entry[1];
if (RTC_DOM_Data < 1 || RTC_DOM_Data > 31) time_error = 2;
RTC_Mon_Data = (10 * t_entry[2]) + t_entry[3];
if (RTC_Mon_Data < 1 || RTC_Mon_Data > 12) time_error = 2;
}
RTC_Yr_Data = (10 * t_entry[4]) + t_entry[5];
if (RTC_Yr_Data > 99) time_error = 2;
RTC_Hr_Data = (10 * t_entry[6]) + t_entry[7];
if (RTC_Hr_Data > 24) time_error = 2;
RTC_Min_Data = (10 * t_entry[8]) + t_entry[9];
if (RTC_Min_Data > 60) time_error = 2;
RTC_Sec_Data = (10 * t_entry[10]) + t_entry[11];
if (RTC_Sec_Data > 60) time_error = 2;
if (RTCfmt == 0)
{
fprintf(COM_A, "\n\r%02u/%02u/%02u %02u:%02u:%02u\n\r", RTC_Mon_Data,
RTC_DOM_Data,RTC_Yr_Data,RTC_Hr_Data,RTC_Min_Data,RTC_Sec_Data);
}
if (RTCfmt == 1)
{
fprintf(COM_A, "\n\r%02u/%02u/%02u %02u:%02u:%02u\n\r", RTC_DOM_Data,
RTC_Mon_Data,RTC_Yr_Data,RTC_Hr_Data,RTC_Min_Data,RTC_Sec_Data);
}
if (time_error == 2) cmd_inv();
}
else cmd_arg();
return time_error;
}
int8 get_time()
{
int8 c, n;
int8 t_entry[12];
int8 time_error;
memset (&t_entry[0], 0x00, 12); //blank it
time_error = 0;
fputc('[', COM_A);
while(n<12){
c = fgetc(COM_A);
if(c != 8){
if (com_echo == TRUE)
{
fputc(c,COM_A);
}
t_entry[n] = c;
n++;
}else{
//backspace code
if(n != 0){
t_entry[n-1] = 0;
n--;
//Clear buffer and overwrite with previous minus one character
fputc('\r',COM_A);
fprintf(COM_A," ");
fputc('\r',COM_A);
fprintf(COM_A,"[");
fprintf(COM_A,t_entry);
}
}
}
n = 0;
while(t_entry[n] != 0){
//fputc(input_string[i],COM_A);
if(!isdigit(t_entry[n])){
//fputs("\r\n@ARG ", COM_A);
time_error = 1;
break;
}else{
time_error = 0;
}
n++;
}
if (time_error == 0){
fputc(']', COM_A);
for (n=0; n<12; ++n){
t_entry[n] = (t_entry[n] - 48);
}
if (RTCfmt == 0)
{
RTC_Mon_Data = (10 * t_entry[0]) + t_entry[1];
if (RTC_Mon_Data < 1 || RTC_Mon_Data > 12) time_error = 2;
RTC_DOM_Data = (10 * t_entry[2]) + t_entry[3];
if (RTC_DOM_Data < 1 || RTC_DOM_Data > 31) time_error = 2;
}
if (RTCfmt == 1)
{
RTC_DOM_Data = (10 * t_entry[0]) + t_entry[1];
if (RTC_DOM_Data < 1 || RTC_DOM_Data > 31) time_error = 2;
RTC_Mon_Data = (10 * t_entry[2]) + t_entry[3];
if (RTC_Mon_Data < 1 || RTC_Mon_Data > 12) time_error = 2;
}
RTC_Yr_Data = (10 * t_entry[4]) + t_entry[5];
if (RTC_Yr_Data > 99) time_error = 2;
RTC_Hr_Data = (10 * t_entry[6]) + t_entry[7];
if (RTC_Hr_Data > 24) time_error = 2;
RTC_Min_Data = (10 * t_entry[8]) + t_entry[9];
if (RTC_Min_Data > 60) time_error = 2;
RTC_Sec_Data = (10 * t_entry[10]) + t_entry[11];
if (RTC_Sec_Data > 60) time_error = 2;
if (RTCfmt == 0)
{
fprintf(COM_A, "\n\r%02u/%02u/%02u %02u:%02u:%02u\n\r", RTC_Mon_Data,
RTC_DOM_Data,RTC_Yr_Data,RTC_Hr_Data,RTC_Min_Data,RTC_Sec_Data);
}
if (RTCfmt == 1)
{
fprintf(COM_A, "\n\r%02u/%02u/%02u %02u:%02u:%02u\n\r", RTC_DOM_Data,
RTC_Mon_Data,RTC_Yr_Data,RTC_Hr_Data,RTC_Min_Data,RTC_Sec_Data);
}
if (time_error == 2) cmd_inv();
}
else cmd_arg();
return time_error;
}
void RTC_Set(){
int8 time_error;
int8 RTC_buffer;
time_error = get_time();
if (time_error ==0 ){
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x86); // address - Month
RTC_buffer = spi_read(Dec2Bcd(RTC_Mon_Data)); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x85); // address - DOM
RTC_buffer = spi_read(Dec2Bcd(RTC_DOM_Data)); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x87); // address - Year
RTC_buffer = spi_read(Dec2Bcd(RTC_Yr_Data)); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x83); // address - Hour
RTC_buffer = spi_read(Dec2Bcd(RTC_Hr_Data)); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x82); // address - Min
RTC_buffer = spi_read(Dec2Bcd(RTC_Min_Data)); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x81); // address - Sec
RTC_buffer = spi_read(Dec2Bcd(RTC_Sec_Data)); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x80); // address - ms
RTC_buffer = spi_read(Dec2Bcd(0)); // data
output_bit(RTC_CS, DISABLE);
}
}
// set alarm to wake up at real-time
void RTC_alarm(){
int8 time_error;
int8 RTC_buffer;
RTC_read_alarm();
time_error = get_time();
if (time_error == 0 ){
// RTC does not have a year register - store in EEPROM
RTC_Al_Yr_Reg = RTC_Yr_Data;
write8(ADDR_ALARM_YR, RTC_Al_Yr_Reg);
// Masking AFE bit to ensure alarm output is enabled
RTC_Mon_Data = Dec2Bcd(RTC_Mon_Data);
RTC_Mon_Data = RTC_Mon_Data | 0b10000000;
// Freq DC to 2 MHz ((10/4)/16) = 625 kHz
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
delay_us(10);
// Do not write alarm seconds last
// ... it disables the interrupt/flag
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8E); // address - Sec
RTC_buffer = spi_read(Dec2Bcd(RTC_Sec_Data)); // data
output_bit(RTC_CS, DISABLE);
delay_us(1); // Delays added 1.020A
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8D); // address - Min
RTC_buffer = spi_read(Dec2Bcd(RTC_Min_Data)); // data
output_bit(RTC_CS, DISABLE);
delay_us(1);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8C); // address - Hour
RTC_buffer = spi_read(Dec2Bcd(RTC_Hr_Data)); // data
output_bit(RTC_CS, DISABLE);
delay_us(1);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8B); // address - DOM
RTC_buffer = spi_read(Dec2Bcd(RTC_DOM_Data)); // data
output_bit(RTC_CS, DISABLE);
delay_us(1);
output_bit(RTC_CS, ENABLE);
//fprintf(COM_A,"test61\r\n");
RTC_buffer = spi_read(0x8A);// address - Month
//fprintf(COM_A,"test62\r\n");
//fprintf(COM_A,"test6: %d\r\n",RTC_Mon_Data);
RTC_buffer = spi_read(RTC_Mon_Data); // data
output_bit(RTC_CS, DISABLE);
delay_us(1);
//fprintf(COM_A,"test6\r\n");
RTC_read_alarm();
}
}
// set default / valid alarm
void RTC_alarm_reset(){
int8 RTC_buffer;
RTC_read_alarm();
// RTC does not have a year register - store in EEPROM
RTC_Al_Yr_Reg = RTC_Yr_Data;
write8(ADDR_ALARM_YR, 10); // 2010
// Masking AFE bit to ensure alarm output is enabled
RTC_Mon_Data = Dec2Bcd(1); // = Jan
RTC_Mon_Data = RTC_Mon_Data | 0b10000000;
// Freq DC to 2 MHz ((10/4)/16) = 625 kHz
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
delay_us(10);
// Do not write alarm seconds last
// ... it disables the interrupt/flag
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8E); // address - Sec
RTC_buffer = spi_read(Dec2Bcd(0)); // data = 0
output_bit(RTC_CS, DISABLE);
delay_us(1); // Delays added 1.020A
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8D); // address - Min
RTC_buffer = spi_read(Dec2Bcd(0)); // data = 0
output_bit(RTC_CS, DISABLE);
delay_us(1);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8C); // address - Hour
RTC_buffer = spi_read(Dec2Bcd(13)); // data = 13:00
output_bit(RTC_CS, DISABLE);
delay_us(1);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8B); // address - DOM
RTC_buffer = spi_read(Dec2Bcd(1)); // data = 1st
output_bit(RTC_CS, DISABLE);
delay_us(1);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8A); // address - Month
RTC_buffer = spi_read(RTC_Mon_Data); // data = Jan
output_bit(RTC_CS, DISABLE);
delay_us(1);
RTC_read_alarm();
}
// set alarm to go off every minute
void RTC_minute()
{
int8 RTC_buffer;
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
// Do not write alarm seconds last. It will disable the interrupt/flag
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8E); // address - Sec
RTC_buffer = spi_read(0b00000000); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8D); // address - Min
RTC_buffer = spi_read(0b10000000); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8C); // address - Hour
RTC_buffer = spi_read(0b10000000); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8B); // address - DOM
RTC_buffer = spi_read(0b11000000); // data
output_bit(RTC_CS, DISABLE);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8A); // address - Month
RTC_buffer = spi_read(0b10000000); // data
output_bit(RTC_CS, DISABLE);
RTC_read_alarm();
}
// Enables IRQ output (hardware)
void RTC_set_AFE()
{
int8 RTC_buffer;
RTC_buffer = 0;
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x0A);
RTC_Al_Mon_Reg = spi_read(RTC_buffer);
output_bit(RTC_CS, DISABLE);
RTC_Al_Mon_Reg = RTC_Al_Mon_Reg | 0b10000000;
output_bit(RTC_CS, ENABLE);
RTC_buffer = spi_read(0x8A); // address - Month
RTC_buffer = spi_read(RTC_Al_Mon_Reg); // data
output_bit(RTC_CS, DISABLE);
}
// *** RTC checks & status *** //
void RTC_last_power()
{
rtc_last_sec = RTC_Sec_Reg;
rtc_last_min = RTC_Min_Reg;
rtc_last_hour = RTC_Hr_Reg;
rtc_last_day = RTC_DOM_Reg;
rtc_last_month = RTC_Mon_Reg;
rtc_last_year = RTC_Yr_Reg;
write8(ADDR_LAST_MONTH, rtc_last_month);
write8(ADDR_LAST_DAY, rtc_last_day);
write8(ADDR_LAST_YEAR, rtc_last_year);
write8(ADDR_LAST_HOUR, rtc_last_hour);
write8(ADDR_LAST_MIN, rtc_last_min);
write8(ADDR_LAST_SEC, rtc_last_sec);
}
void RTC_late()
{
float time_now = 0;
float time_alarm = 0;
float fraction_of_day = 0;
float hour, minute, second;
// J F M A M J J A S O N D
int16 end_of_month[12] = {0,31,59,90,120,151,181,212,243,273,304,334};
// 0 1 2 3 4 5 6 7 8 9 10 11
alarm_passed = FALSE;
RTC_read();
RTC_read_alarm();
RTC_Al_Yr_Reg = read8(ADDR_ALARM_YR);
// if current year > alarm year .. alarm is in the past
if (RTC_Yr_Reg > RTC_Al_Yr_Reg) alarm_passed = TRUE;
else {
// if current year = alarm year .. test rest of fields
if (RTC_Yr_Reg == RTC_Al_Yr_Reg) {
// calculate fractional current time
time_now = end_of_month[RTC_Mon_Reg-1];
time_now = time_now + RTC_DOM_Reg;
hour = RTC_Hr_Reg;
minute = RTC_Min_Reg;
second = RTC_Sec_Reg;
fraction_of_day = (hour / 24);
fraction_of_day = fraction_of_day + (minute / (24*60));
fraction_of_day = fraction_of_day + (second / (24*60*60));
time_now = time_now + fraction_of_day;
// calculate fractional alarm time
hour = RTC_Al_Hr_Reg;
minute = RTC_Al_Min_Reg;
second = RTC_Al_Sec_Reg;
time_alarm = end_of_month[RTC_Al_Mon_Reg-1];
time_alarm = time_alarm + RTC_Al_DOM_Reg;
fraction_of_day = (hour / 24);
fraction_of_day = fraction_of_day + (minute / (24*60));
fraction_of_day = fraction_of_day + (second / (24*60*60));
time_alarm = time_alarm + fraction_of_day;
// compare real and alarm time
if (time_now > time_alarm) alarm_passed = TRUE;
}
}
}
void RTC_alarm_status()
{
if (alarm_passed == TRUE) fprintf(COM_A, "@ALM\r\n");
}