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- #include <Wire.h>
- #include "ds3231.h"
- #define BUFF_MAX 128
- uint8_t Time[8];
- char recv[BUFF_MAX];
- unsigned int recv_size = 0;
- unsigned long prev, interval = 5000;
- void parse_cmd(char *cmd, int cmdsize);
- void setup()
- {
- Serial.begin(9600);
- Wire.begin();
- DS3231_init(DS3231_CONTROL_INTCN);
- memset(recv, 0, BUFF_MAX);
- Serial.println("GET time");
- }
- void loop()
- {
- char in;
- char buff[BUFF_MAX];
- unsigned long now = millis();
- struct ts t;
- // show time once in a while
- if ((now - prev > interval) && (Serial.available() <= 0)) {
- DS3231_get(&t);
- // there is a compile time option in the library to include unixtime support
- #ifdef CONFIG_UNIXTIME
- #ifdef __AVR__
- snprintf(buff, BUFF_MAX, "%d.%02d.%02d %02d:%02d:%02d %ld", t.year,
- #error AVR
- #else
- snprintf(buff, BUFF_MAX, "%d.%02d.%02d %02d:%02d:%02d %d", t.year,
- #endif
- t.mon, t.mday, t.hour, t.min, t.sec, t.unixtime);
- #else
- snprintf(buff, BUFF_MAX, "%d.%02d.%02d %02d:%02d:%02d", t.year,
- t.mon, t.mday, t.hour, t.min, t.sec);
- #endif
- Serial.println(buff);
- prev = now;
- }
- if (Serial.available() > 0) {
- in = Serial.read();
- if ((in == 10 || in == 13) && (recv_size > 0)) {
- parse_cmd(recv, recv_size);
- recv_size = 0;
- recv[0] = 0;
- } else if (in < 48 || in > 122) {; // ignore ~[0-9A-Za-z]
- } else if (recv_size > BUFF_MAX - 2) { // drop lines that are too long
- // drop
- recv_size = 0;
- recv[0] = 0;
- } else if (recv_size < BUFF_MAX - 2) {
- recv[recv_size] = in;
- recv[recv_size + 1] = 0;
- recv_size += 1;
- }
- }
- }
- void parse_cmd(char *cmd, int cmdsize)
- {
- uint8_t i;
- uint8_t reg_val;
- char buff[BUFF_MAX];
- struct ts t;
- //snprintf(buff, BUFF_MAX, "cmd was '%s' %d\n", cmd, cmdsize);
- //Serial.print(buff);
- // TssmmhhWDDMMYYYY aka set time
- if (cmd[0] == 84 && cmdsize == 16) {
- //T355720619112011
- t.sec = inp2toi(cmd, 1);
- t.min = inp2toi(cmd, 3);
- t.hour = inp2toi(cmd, 5);
- t.wday = cmd[7] - 48;
- t.mday = inp2toi(cmd, 8);
- t.mon = inp2toi(cmd, 10);
- t.year = inp2toi(cmd, 12) * 100 + inp2toi(cmd, 14);
- DS3231_set(t);
- Serial.println("OK");
- } else if (cmd[0] == 49 && cmdsize == 1) { // "1" get alarm 1
- DS3231_get_a1(&buff[0], 59);
- Serial.println(buff);
- } else if (cmd[0] == 50 && cmdsize == 1) { // "2" get alarm 1
- DS3231_get_a2(&buff[0], 59);
- Serial.println(buff);
- } else if (cmd[0] == 51 && cmdsize == 1) { // "3" get aging register
- Serial.print("aging reg is ");
- Serial.println(DS3231_get_aging(), DEC);
- } else if (cmd[0] == 65 && cmdsize == 9) { // "A" set alarm 1
- DS3231_set_creg(DS3231_CONTROL_INTCN | DS3231_CONTROL_A1IE);
- //ASSMMHHDD
- for (i = 0; i < 4; i++) {
- Time[i] = (cmd[2 * i + 1] - 48) * 10 + cmd[2 * i + 2] - 48; // ss, mm, hh, dd
- }
- uint8_t flags[5] = { 0, 0, 0, 0, 0 };
- DS3231_set_a1(Time[0], Time[1], Time[2], Time[3], flags);
- DS3231_get_a1(&buff[0], 59);
- Serial.println(buff);
- } else if (cmd[0] == 66 && cmdsize == 7) { // "B" Set Alarm 2
- DS3231_set_creg(DS3231_CONTROL_INTCN | DS3231_CONTROL_A2IE);
- //BMMHHDD
- for (i = 0; i < 4; i++) {
- Time[i] = (cmd[2 * i + 1] - 48) * 10 + cmd[2 * i + 2] - 48; // mm, hh, dd
- }
- uint8_t flags[5] = { 0, 0, 0, 0 };
- DS3231_set_a2(Time[0], Time[1], Time[2], flags);
- DS3231_get_a2(&buff[0], 59);
- Serial.println(buff);
- } else if (cmd[0] == 67 && cmdsize == 1) { // "C" - get temperature register
- Serial.print("temperature reg is ");
- Serial.println(DS3231_get_treg(), DEC);
- } else if (cmd[0] == 68 && cmdsize == 1) { // "D" - reset status register alarm flags
- reg_val = DS3231_get_sreg();
- reg_val &= B11111100;
- DS3231_set_sreg(reg_val);
- } else if (cmd[0] == 70 && cmdsize == 1) { // "F" - custom fct
- reg_val = DS3231_get_addr(0x5);
- Serial.print("orig ");
- Serial.print(reg_val,DEC);
- Serial.print("month is ");
- Serial.println(bcdtodec(reg_val & 0x1F),DEC);
- } else if (cmd[0] == 71 && cmdsize == 1) { // "G" - set aging status register
- DS3231_set_aging(0);
- } else if (cmd[0] == 83 && cmdsize == 1) { // "S" - get status register
- Serial.print("status reg is ");
- Serial.println(DS3231_get_sreg(), DEC);
- } else {
- Serial.print("unknown command prefix ");
- Serial.println(cmd[0]);
- Serial.println(cmd[0], DEC);
- }
- }
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