Method and apparatus for providing downloadable functionality to an embedded coprocessor

• US 6,295,645 B1
• Filed: 12/22/1997
• Issued: 09/25/2001
• Est. Priority Date: 12/22/1997
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Brewer, Jason M.
• Primary Examiner(s): Powell, Mark R.
• Assistant Examiner(s): DAS, CHAMELI
• Application Number:
  US08/995,597
• Time in Patent Office: 1,373 Days
• Field of Search: 395/712, 395/200.58, 395/200.33, 395/500, 395/682, 395/800.43, 707/10, 717/11, 717/5
• US Class Current: 717/178
• CPC Class Codes: G06F 8/52 Binary to binary
• CPC Class Codes: G06F 9/44521 Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
• CPC Class Codes: G06F 9/45529 Embedded in an application, e.g. JavaScript in a Web browser

Abstract

A wireless data platform (10) comprises a plurality of processors (12,16). Channels of communication are set up between processors such that they may communicate information as tasks are performed. A dynamic cross compiler (80) executed on one processor compiles code into native processing code for another processor. A dynamic cross linker (82) links the compiled code for other processor. Native code may also be downloaded to the platform through use of a JAVA Bean (90) (or other language type) which encapsulates the native code. The JAVA Bean can be encrypted and digitally signed for security purposes.

Claims

1. A method of controlling an electronic device comprising:

storing a file of native code within a source code wrapper extemal to said electronic device;

downloading the source code wrapper to a host processor in said electronic device;

retrieving said native code from the source code wrapper;

loading said native code on a second processor in said electronic device; and

executing said native code on said second processor.

2. The method of claim 1 wherein said storing step comprises the step of storing a file of native code within a JAVA Bean.

3. The method of claim 1 wherein said downloading step comprises the step of downloading the source code wrapper from a network connection.

4. The method of claim 3 wherein said step of downloading the source code wrapper from a network connection comprises the step of downloading the source code wrapper via an Internet connection.

5. The method of claim 1 wherein said downloading step comprises the step of downloading the source code wrapper from a removable peripheral device.

6. The method of claim 4 wherein said step of downloading the source code wrapper from a removable peripheral device comprises the step of downloading the source code wrapper from a smartcard.

7. The method of claim 4 wherein said step of downloading the source code wrapper from a removable peripheral device comprises the step of downloading the source code wrapper from a PC Card.

8. The method of claim 1 wherein storing step includes the step of storing information regarding the native code in said source code wrapper.

9. The method of claim 8 wherein said information includes the memory requirements of the native code.

10. The method of claim 8 wherein said information includes the processing requirements of the native code.

11. The method of claim 8 wherein said information includes an indication of the type of processor needed to execute the native code.

12. The method of claim 8 and fuirther comprising the step of determining whether the second processor has sufficient resources to execute said native code.

13. The method of claim 1 wherein said step of installing the native code on said target processor comprises the step of installing said native code on a digital signal processor.

14. The method of claim 1 wherein said source code wrapper is executed on a host processor.

15. The method of claim 14 wherein said second processor is said host processor.

16. The method of claim 1 wherein said electronic device is a Personal Digital Assistant.

17. The method of claim 1 wherein said electronic device is a Smartphone.

18. The method of claim 1 wherein said second processor is a coprocessor.

19. The method of claim 1 wherein said second processor is a digital signal processor (DSP).

20. A method of controlling an electronic device, comprising the steps of:

executing an application on a host processor associated with the electronic device;

retrieving a JAVA Bean responsive to code in said application, said JAVA Bean having a stored file comprising native code for a second processor associated with the electronic device;

installing said native code on said second processor; and

executing said native co de on said second processor.

21. The method of claim 20 wherein said JAVA Bean further includes

stored attributes providing information about said native code and further comprising

the steps of retrieving said attributes from said JAVA Bean and

determining whether said target processor has sufficient resources to execute said native code based on said attributes.

22. The method of claim 21 wherein said installing step comprises the step of determining which of a plurality of processors is said second processor responsive to said attributes.

23. The method of claim 22 wherein said second processor is a digital signal processor.

24. The method of claim 22 wherein said second processor is said host processor.

25. The method of claim 20 wherein said electronic device is a Personal Digital Assistant (PDA).

26. The method of claim 20 wherein said electronic device is a Smartphone.

27. The method of claim 20 wherein said second processor is a coprocessor.

28. The method of claim 20 wherein said second processor is a digital signal processor (DSP).

34. The electronic device of claim 21 wherein said electronic device is a Personal Digital Assistant (P)DA).

35. The electronic device of claim 21 wherein said electronic device is a Smartphone.

36. The electronic device of claim 21 wherein said second processor is a coprocessor.

37. The electronic device of claim 21 wherein said second processor is a digital signal processor (DSP).

29. An electronic device comprising:

a host processor for;

downloading a source code wrapper containing native code from an external device for execution on a second processor in said electronic device;

retrieving said native code from the source code wrapper;

installing said native code on said second processor; and

initiating execution of said native code on said second processor; and

circuitry for communicating between said host processor and said second processor.

30. The electronic device of claim 29 wherein said second processor is a digital signal processor.

31. The electronic device of claim 30 wherein said host processor wherein said source code wrapper is a JAVA Bean.

32. The electronic device of claim 29 wherein said external device is a ne twork server.

33. The electronic device of claim 32 wherein said external device is an Internet server. (PDA).