METHOD FOR TRANSMITTING PROGRAM CODES TO A MEMORY OF A CONTROL DEVICE, PARTICULARLY FOR MOTOR VEHICLES

• US 20110264844A1
• Filed: 10/12/2009
• Published: 10/27/2011
• Est. Priority Date: 10/23/2008
• Status: Active Grant

• Current Assignee: Knorr-Bremse Systeme Fur Nutzfahrzeuge GMBH (Estate of Heinz Hermann Thiele)
• Original Assignee: Knorr-Bremse Systeme Fur Nutzfahrzeuge GMBH (Estate of Heinz Hermann Thiele)
• Inventors: Fischer, Uwe, Kanzler, Ulrich
• Granted Patent: US 8,782,328 B2
• Time in Patent Office: Days
• US Class Current: 711/103
• CPC Class Codes: G06F 8/61 Installation
• CPC Class Codes: H03M 7/40 Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
• CPC Class Codes: H03M 7/42 using table look-up for the coding or decoding process, e.g. using read-only memory H03M7/4006 takes precedence

Abstract

A method is described for transmitting program codes to a program memory in a controller, particularly in a motor vehicle, having the following operations: a) connecting an interface in a controller to a programming appliance which contains the program codes, setting all the memory cells of the program memory in the controller to a standard value, compressing the program code in the programming appliance on the basis of a lossless data compression process, transmitting the compressed program code to the controller, decompressing the received program code in the controller, and storing the decompressed program code in the program memory in the controller.

Claims

1-6. -6. (canceled)

7. A method for transmitting program codes to a program memory in a controller, which is in a motor vehicle, the method comprising:

connecting an interface in a controller to a programming appliance which contains the program codes;

setting all the memory cells of the program memory in the controller to a standard value;

compressing the program code in the programming appliance based on a lossless data compression process;

transmitting the compressed program code to the controller;

decompressing the received program code in the controller; and

storing the decompressed program code in the program memory in the controller.

8. The method of claim 7, wherein all the unused memory cells of the program memory in the controller have an invalid program code written to them.

9. The method of claim 7, wherein the standard value is an invalid program code.

10. The method of claim 9, wherein the invalid program code is transmitted from the programming appliance to the controller.

11. The method of claim 9, wherein the programming appliance transmits only valid program codes sequentially to the controller, while a value of the invalid program code is transmitted no more than once.

12. The method of claim 7, wherein the program codes are compressed and decompressed based on Huffman coding.