| 摘要 |
PURPOSE: A firmware upgrade method of a traffic signal controller is provided to make a sub control unit successively upgrade a firmware segment file by generating/transmitting the next index number by a main control unit when time-out is generated. CONSTITUTION: A file size capable of being transmitted per period is calculated through a period and a communication speed and a firmware upgrade file stored for upgrading the firmware is divided into a segment files based on the file size. A terminal generates an index number given to the segment files by the period, matches the generated index number to result information within the period and successively transmits to a server. The segment file matches the index number to the order and transmits the index number to the terminal. [Reference numerals] (10) F/W upgrade instruction (instruct by an operator's command); (101) Main control unit; (103) Sub control unit; (105) Traffic command center; (11,12) F/W upgrade instruction (Module ID: SCU); (13) Response to the F/W upgrade instruction; (14) Situation information request; (15) Response to the situation information request N=0 + F/W ID + F/W Datagram lndex (N); (16) Situation information request + F/W Datagram lndex (N); (17,BB) F/W Datagram Download (Module ID: SCU); (18) Next index number reception determination; (19) F/W Datagram Download response F/W Datagram lndex (Ns); (20) Response to the situation information request N=N+1 (increase before a SCU response); (21) Situation information request + F/W Datagram (padded to be 0 as the final value); (22) Completion of the response to the situation information request; (23,24) CRC32 inspection; (25) F/W upgrade instruction response (Error=CRC Error); (26) F/W upgrade instruction response (Error=CRC Error); (AA) N=Ns + F/W ID + F/W Datagram Index (N) when there is no Datagram (Ns); (CC) F/W Datagram Download response F/W Datagram lndex (0:completion); (DD,EE) Restart |
