bool RTC_DS3231::setAlarm(uint8_t alarm) {
clearAlarm(alarm);
uint8_t ctrl = read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL);
ctrl |= 0x04; // turn on INTCN
ctrl |= alarm; // set bit alarm
write_i2c_register(DS3231_ADDRESS, DS3231_CONTROL, ctrl);
return true;
}
bool RTC_DS3231::clearAlarm(uint8_t alarm) {
uint8_t regStatus = read_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG);
if(alarm==0)
regStatus &= ~0x03;
else
regStatus &= ~alarm;
write_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG, regStatus);
return true;
}
bool RTC_DS3231::switchClock(bool state) {
uint8_t ctrl = read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL);
if(state)
ctrl |= 0x04; // turn on INTCN
else
ctrl &= ~0x04; // turn off INTCN
write_i2c_register(DS3231_ADDRESS, DS3231_CONTROL, ctrl);
return true;
}
void RTC_DS3231::writeSqwPinMode(Ds3231SqwPinMode mode) {
uint8_t ctrl;
ctrl = read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL);
ctrl &= ~0x04; // turn off INTCON
ctrl &= ~0x18; // set freq bits to 0
if (mode == DS3231_OFF) {
ctrl |= 0x04; // turn on INTCN
} else {
ctrl |= mode;
}
write_i2c_register(DS3231_ADDRESS, DS3231_CONTROL, ctrl);
}
void RTC_DS3231::adjust(const DateTime& dt) {
Wire.beginTransmission(DS3231_ADDRESS);
Wire._I2C_WRITE((byte)0); // start at location 0
Wire._I2C_WRITE(bin2bcd(dt.second()));
Wire._I2C_WRITE(bin2bcd(dt.minute()));
Wire._I2C_WRITE(bin2bcd(dt.hour()));
Wire._I2C_WRITE(bin2bcd(0));
Wire._I2C_WRITE(bin2bcd(dt.day()));
Wire._I2C_WRITE(bin2bcd(dt.month()));
Wire._I2C_WRITE(bin2bcd(dt.year() - 2000));
Wire.endTransmission();
uint8_t statreg = read_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG);
statreg &= ~0x80; // flip OSF bit
write_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG, statreg);
}
// Returns the number of characters it read from the Bluetooth
// Data is available in the I2CSlaveBuffer
int16_t receive_bl_message() {
int16_t index = 0;
uint64_t start = unixtime;
while(unixtime - start <= BL_TIMEOUT) {
if(is_bl_message_available()) {
bl_receive[index] = (char) read_i2c_register(BL_RAADR, BL_WAADR, BL_RHR);
index++;
if(bl_receive[index - 1] == '\0') { // Got the entire message
// printf("BL msg rcv size: [%d]\n", index);
break;
}
// If we have gotten 64 characters but not null than we want to send an ack and read the rest of them again
if(index % 64 == 0) {
// Send an ack
set_bl_opcode(B_ACK);
start = unixtime;
send_bl_message();
}
}
}
if(unixtime - start >= 3) index = -1;
return index;
}
bool RTC_DS3231::isAlarmRinging(uint8_t alarm) {
return (read_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG) & alarm) ? true : false;
}
bool RTC_DS3231::isAlarmSet(uint8_t alarm) {
return (read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL) & alarm) ? true : false;
}
uint8_t RTC_DS3231::readRegister(uint8_t reg) {
return read_i2c_register(DS3231_ADDRESS, reg);
}
uint8_t RTC_DS3231::readRegStatus() {
return read_i2c_register(DS3231_ADDRESS, DS3231_STATUSREG);
}
bool RTC_DS3231::isClockOn() {
return (read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL) & 0x04) ? true : false;
}
uint8_t RTC_DS3231::readRegControl() {
return read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL);
}
uint8_t is_bl_message_available() {
return read_i2c_register(BL_RAADR, BL_WAADR, BL_LSR) & 0x01;
}
uint16_t get_current_voltage() {
return (read_i2c_register(FG_RAADR, FG_WAADR, 0x02) << 8)
+ (read_i2c_register(FG_RAADR, FG_WAADR, 0x03) << 4);
}
uint8_t get_power_remaining() {
return read_i2c_register(FG_RAADR, FG_WAADR, 0x04);
}
uint8_t is_running_on_battery() {
return read_i2c_register(FG_RAADR, FG_WAADR, 0x04) == 0 ? 0 : 1;
}
