Flash loader for vehicle electronic control units

• US 20040078119A1
• Filed: 08/05/2003
• Published: 04/22/2004
• Est. Priority Date: 08/05/2002
• Status: Active Grant

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Daimler Chrysler Corporation (Mercedes-Benz Group AG)
• Inventors: Birko, Andrij A., Luitje, William V., Pruett, Thomas H.
• Granted Patent: US 6,925,365 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: G06F 8/60 Software deployment

Abstract

A flashloader having a standard module for receiving programming instructions and an application program via a communications port of a vehicle controller, where the flashloader further provides an MCU module for writing the received application program to reprogrammable memory within the vehicle controller, and an ECU module for determining whether a valid application program has been stored in the reprogrammable memory. Upon detection of a valid application program a microprocessor of the vehicle controller executes instructions from the reprogrammable memory and upon detection of an invalid application program the microprocessor continues to execute instructions from the bootloader.

Claims

1. In a vehicle controller having a microprocessor connected to a reprogrammable memory for storing an application program and to a communications port for communicating with a reprogramming device, a flashloader firmware comprising:

a standard module for receiving programming instructions and the application program via the communications port;

an MCU module for writing the received application program to the reprogrammable memory; and

an ECU module for determining whether a valid application program has been stored in the reprogrammable memory;

wherein upon detection of a valid application program the microprocessor executes instructions from the reprogrammable memory and upon detection of an invalid application program the microprocessor continues to execute instructions from the flashloader.

2. The vehicle controller flashloader firmware of claim 1 further comprising the ECU module being operative to place the vehicle controller in one of a low power state and a power-down state.

3. The vehicle controller flashloader of claim 2 farther comprising the ECU module being operative to place the vehicle controller in one of a low power state and a power-down state after a predetermined amount of time.

4. The vehicle controller flashloader of claim 2 further comprising the ECU module being operative to periodically attempt to place the vehicle controller in one of a low power state and a power-down state when the software module expects programming instructions to arrive via the communications port and the programming instructions have been received after the predetermined amount of time.