Methods and systems for synchronization of slave device with master device

A method of synchronizing a slave device coupled to a master device by determining the number of columns and rows of a two-dimensional frame the method comprising:

• receiving a bitstream of data in a serial transmission;
• arranging the bitstream of data into a two-dimensional frame having a plurality of columns and rows;
• searching an even-numbered column of an initial group and then even-numbered columns of successive groups for an occurrence of an 8-bit static sync word having a constant sync value, wherein the initial group having two adjacent columns and each of the successive groups having two adjacent columns added to the previously searched group until a maximum number of columns is reached, wherein the search is terminated upon the occurrence of the 8-bit static sync word, and wherein the total number of columns of the two-dimensional frame is equal to the number of columns of the group containing the 8-bit static sync word;
• re-aligning the two-dimensional frame by shifting and re-numbering the column having the 8-bit static sync word to column zero;
• searching column zero for the next occurrence of the 8-bit static sync word;
• based on the next occurrence of the 8-bit static sync word, identifying a row number corresponding to the matched constant sync value of the 8-bit static sync word;
• and
• based on the identified row number, determining the number of rows of the re-aligned frame.

A method of synchronizing a slave device coupled to a master device by determining the number of columns of a two-dimensional frame based on the SoundWire standard, the method comprising:

• receiving a bitstream of data in a serial transmission;
• arranging the serially transmitted bitstream of data into the two-dimensional frame having a plurality of columns and rows;
• searching an even-numbered column of an initial group and then even-numbered columns of successive groups for an occurrence of an 8-bit static sync word having a constant sync value, wherein the initial group having two adjacent columns and each of the successive groups having two adjacent columns added to the previously searched group until a maximum number of columns is reached, wherein the search is terminated upon the occurrence of the 8-bit static sync word, and wherein the total number of columns of the two-dimensional frame is equal to the number of columns of the group in which the 8-bit static sync word is located,
• wherein searching the columns comprises:
• assigning respective counters to the even-numbered columns and setting initial count values of the counters to 7;
• for each occurrence of a bit of the 8-bit static sync word, decrementing the count value of the corresponding counters by 1;
• and
• identifying the counter having the count value decremented to 0 and identifying the corresponding column, wherein the identified column has the 8-bit static sync word.

A finite state machine (FSM) configured to synchronize a slave device coupled to a master device, the FSM is configured:

• to receive a bitstream of data in a serial transmission;
• to arrange the bitstream of data into a two-dimensional frame having a plurality of columns and rows;
• to search an even-numbered column of an initial group and then to search even-numbered columns of successive groups for an occurrence of an 8-bit static sync word having a constant sync value, wherein the initial group having two adjacent columns and each of the successive groups having two adjacent columns added to the previously searched group until a maximum number of columns is reached, wherein the search is terminated upon the occurrence of the 8-bit static sync word, and wherein the total number of columns of the two-dimensional frame is equal to the number of columns of the group containing the 8-bit static sync word;
• to re-align the two-dimensional frame by shifting and re-numbering the column having the 8-bit static sync word to column zero;
• to search column zero for the next occurrence of the 8-bit static sync word;
• to identify a row number corresponding to the matched constant sync value of the 8-bit static sync word based on the next occurrence of the 8-bit static sync word;
• and
• to determine the number of rows of the re-aligned frame based on the identified row number.

A digital audio system having a master device coupled to one or more slave devices, the system comprising:

• a receiver coupled to receive a bitstream of data in a serial transmission;
• a storage device coupled to the receiver and configured to store the bitstream of data in a two-dimensional frame having a plurality of columns and rows;
• and
• a processor coupled to the storage device, the processor configured to search an even-numbered column of an initial group and then search even-numbered columns of successive groups for an occurrence of an 8-bit static sync word having a constant sync value, wherein the processor is configured to select the initial group having two adjacent columns and each of the successive groups having two adjacent columns added to the previously searched group until a maximum number of columns is reached, wherein the processor is configured to terminate the search upon the first occurrence of the 8-bit static sync word, and wherein the processor is configured to determine the total number of columns of the two-dimensional frame, wherein the total number of columns is equal to the number of columns of the group containing the 8-bit static sync word.