Makuna
commented
4 years ago The terminal output doesn't match the sketch, did you make other changes? The first line in your serial terminal capture isn't present in the sketch.
After each request for data, check the error, as it seems the same data is being returned for both the address and size of the string (12).
uint8_t address = RtcEeprom.GetMemory(0);
if (RtcEeprom.LastError() != 0) {
// we have a communications error
// see https://www.arduino.cc/en/Reference/WireEndTransmission for
// what the number means
Serial.print("EEPROM communications error = ");
Serial.println(RtcEeprom.LastError());
}uint8_t count = RtcEeprom.GetMemory(1);
if (RtcEeprom.LastError() != 0) {
// we have a communications error
// see https://www.arduino.cc/en/Reference/WireEndTransmission for
// what the number means
Serial.print("EEPROM communications error = ");
Serial.println(RtcEeprom.LastError());
}
rudydevolder
I used the example in the source code: "DS3231_memory.ino" :
My environment is:
But first of all I needed to change some lines to make it compile without errors for Ubunu, Platformio and the STM:
The 3 changes I made are:
Changing the line with:
include towards
include in Ubuntu the capital 'T'in the filename makes a difference.
Putting a Predeclared definition "void printDateTime(const RtcDateTime& dt); " in front because in Platformio I get a compile error. This is a common problem I got when importing code from Arduino in platformio, but simple to solve.
In the function: void printDateTime(const RtcDateTime& dt) I got a compile error for "snprintf_P"doesn't exist for the STM: so I changed: { snprintf_P(datestring, countof(datestring), PSTR("%02u/%02u/%04u %02u:%02u:%02u"), dt.Month(), dt.Day(), dt.Year(), dt.Hour(), dt.Minute(), dt.Second() );
towards:
sprintf(datestring, //countof(datestring), PSTR("%02u/%02u/%04u %02u:%02u:%02u"), dt.Month(), dt.Day(), dt.Year(), dt.Hour(), dt.Minute(), dt.Second() );
Serial1.print(datestring); }
Than I experimented with different data, I know the max. bytes in 1 buffer to write is 32 bytes because of the limitation in page-size.
With: const char data[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123"; //which is 30 bytes long ( excluding the trailing '\0' ) everything works fine.
But when I changed data to: const char data[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ01234"; //which is 31 bytes long I got problems when reading the data: I got in the serial terminal: lenght of data stored: 31 address didn't match 12 something did'nt match, count = 12, gotten 0 data read (0) = ""