Writing to the DS1371

Projects Networking, Protocols, and Devices
1

This is my first uC project, so I'm perhaps missing something, but I can't seem to figure out how wo write to the 0x00-0x03 registers on the DS1371.

From reading the data sheet, it seems like this should work:

void time_set(long t){
  Wire.beginTransmission(104);
  Wire.write(0x0);  // control 0
  Wire.write(0x0);  // register 0
  Wire.write(t);
  Wire.endTransmission();
}

I'm either reading the data sheet incorrectly, or I'm missing something important on how Wire.write() works.

any hints?

2

I'm either reading the data sheet incorrectly, or I'm missing something important on how Wire.write() works.

For one thing, Wire.write() does not take a long. You either need to use the Wire.write() overload that takes an array, and treat the long as an array of (4) bytes, or you need to break the long into 4 bytes, and Wire.write() them in the proper order.