/**
* Reads the account data off the SHAiButton using a standard READ command. First, this function
* asserts that the account page number is known as well as the length of the account file. The 32
* byte account data page is copied into dataBuffer starting at the given offset.
*
* @param dataBuffer the buffer to copy the account data into
* @param offset the index into the buffer where copying should begin
* @return whether or not the read was successful
* @throws OneWireIOException on a 1-Wire communication error such as reading an incorrect CRC
* from a 1-Wire device. This could be caused by a physical interruption in the 1-Wire Network
* due to shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.
* @throws OneWireException on a communication or setup error with the 1-Wire adapter
*/
public synchronized boolean readAccountData(byte[] dataBuffer, int offset)
throws OneWireException, OneWireIOException {
// init local vars
OneWireContainer18 ibcL = this.ibc;
// make sure account info is properly setup
if (!checkAccountPageInfo(ibcL)) {
return false;
}
// if the cache is empty
if (this.accountData[0] == 0) {
// read directly into local cache
ibcL.readMemoryPage(this.accountPageNumber, this.accountData, 0);
}
// copy cached data into user's buffer
System.arraycopy(this.accountData, 0, dataBuffer, offset, 32);
// had to work, right?
return true;
}
