static {
rst = new TPU_DIO(tpuB, RST, true);
sckl = new TPU_DIO(tpuB, SCKL, true);
io = new TPU_DIO(tpuB, IO, false);
rst.set(false);
sckl.set(false);
}
/**
* Write a value to the RTC.
*
* @param type The type (sec, min, ...) to write.
* @param val The value to write.
*/
private static void write(byte type, byte val) {
int w = ((val << 8) | (0xFF & type));
rst.set(true);
io.dir(true);
for (int i = 0x1; i < 0x10000; i <<= 1) {
sckl.set(false);
if ((w & i) != 0) {
io.set(true);
} else {
io.set(false);
}
sckl.set(true);
}
sckl.set(false);
rst.set(false);
}
/**
* Read a value from the RTC.
*
* @param type The type to read (sec, min, ...).
* @return The read value.
*/
private static int read(byte type) {
type |= 0x01;
rst.set(true);
io.dir(true);
for (int i = 0x1; i < 0x100; i <<= 1) {
sckl.set(false);
if ((type & i) != 0) io.set(true);
else io.set(false);
sckl.set(true);
}
int val = 0;
io.dir(false);
for (int i = 0x1; i < 0x100; i <<= 1) {
sckl.set(true);
sckl.set(false);
if (io.get()) val |= i;
}
io.dir(false);
rst.set(false);
return val;
}
