| 0,0 → 1,114 |
|---|
| #include "defines.h" |
| #include "sensor_rtc_DS3231.h" |
| #include "base_I2C.h" |
| |
| void DS3231_Begin() { |
| char reg[3]; |
| reg[0] = DS3231_CONTROL; |
| |
| /* Control Register (0x0E) |
| * Bit 7 - !EOSC |
| * Bit 6 - BBSQW |
| * Bit 5 - CONV |
| * Bit 4 - RS2 |
| * Bit 3 - RS1 |
| * Bit 2 - INTCN |
| * Bit 1 - A2IE |
| * Bit 0 - A1IE |
| */ |
| reg[1] = 0x04; |
| |
| /* Control Register 2 (0x0F) |
| * Bit 3 = EN32kHZ |
| */ |
| reg[2] = 0x00; |
| |
| // Set the configuration registers |
| I2C_Master_Send(DS3231_ADDRESS, 3, reg); |
| char result; |
| do { |
| result = I2C_Get_Status(); |
| } while (!result); |
| } |
| |
| char DS3231_Get_Status(void) { |
| /* Status Register (0x0F) |
| * Bit 7 - OSF |
| * Bit 3 - EN32kHz |
| * Bit 2 - BSY |
| * Bit 1 - A2F |
| * Bit 0 - A1F |
| */ |
| char value; |
| I2C_Master_Restart(DS3231_ADDRESS, 0x0F, 1); |
| char result; |
| do { |
| result = I2C_Get_Status(); |
| } while (!result); |
| I2C_Read_Buffer(&value); |
| return value; |
| } |
| |
| void DS3231_Set_Time(char sec, char min, char hour, char day, char date, |
| char month, char year, char h_mil, char h_am_pm) { |
| |
| // Format the data in a way that the chip expects |
| char output[8]; |
| output[0] = DS3231_SECONDS; |
| output[1] = ((sec / 10) << 4) | (sec % 10); |
| output[2] = ((min / 10) << 4) | (min % 10); |
| output[3] = ((hour / 10) << 4) | (hour % 10); |
| if (!h_mil) { |
| output[3] |= (h_am_pm) ? 0x60 : 0x40; |
| } |
| output[4] = day; |
| output[5] = ((date / 10) << 4) | (date % 10); |
| output[6] = ((month / 10) << 4) | (month % 10); |
| output[7] = ((year / 10) << 4) | (year % 10); |
| |
| // Check the status to make sure that it isnt currently busy |
| char status = DS3231_Get_Status(); |
| while (status & 0x04) |
| status = DS3231_Get_Status(); |
| |
| // Write the data to the chip |
| I2C_Master_Send(DS3231_ADDRESS, 8, output); |
| char result; |
| do { |
| result = I2C_Get_Status(); |
| } while (!result); |
| } |
| |
| void DS3231_Get_Time(char *sec, char *min, char *hour, char *day, char *date, |
| char *month, char *year, char *h_mil, char *h_am_pm) { |
| |
| // Check the status to make sure that it isnt currently busy |
| char status = DS3231_Get_Status(); |
| while (status & 0x04) |
| status = DS3231_Get_Status(); |
| |
| // Request time data from the chip |
| char input[7]; |
| I2C_Master_Restart(DS3231_ADDRESS, 0x00, 7); |
| char result; |
| do { |
| result = I2C_Get_Status(); |
| } while (!result); |
| I2C_Read_Buffer(input); |
| |
| // Parse BCD format into decimal and return |
| *sec = ((input[0] >> 4) * 10) + (input[0] & 0x0F); |
| *min = ((input[1] >> 4) * 10) + (input[1] & 0x0F); |
| if (input[2] & 0x40) { |
| *h_mil = 0; |
| *h_am_pm = (input[2] & 0x20) ? 1 : 0; |
| *hour = (((input[2] >> 4) & 0x01) * 10) + (input[2] & 0x0F); |
| } else { |
| *h_mil = 1; |
| *hour = ((input[2] >> 4) * 10) + (input[2] & 0x0F); |
| } |
| *day = input[3]; |
| *date = ((input[4] >> 4) * 10) + (input[4] & 0x0F); |
| *month = ((input[5] >> 4) * 10) + (input[5] & 0x0F); |
| *year = ((input[6] >> 4) * 10) + (input[6] & 0x0F); |
| } |