Patent Application
20070074200
1. Field of the Invention
The present invention pertains to function selection systems and methods used in computing, and particularly to a system and method for selecting functions in embedded systems.
2. Related Art
Embedded systems are usually designed to perform designated functions. The architecture of an embedded system is often intentionally simplified compared to general-purpose computing hardware. Thus the costs of embedded systems are lower than for general-purpose computing hardware, and embedded systems have become popular. Nowadays, mobile phones, set-top boxes, embedded servers, and personal digital assistants all have embedded systems.
Usually, embedded devices are firmware; that is, a combination of software and hardware. The software for performing different functions of embedded devices is first developed on a computer, and is then embedded in the hardware. Embedded devices are usually designed, according to requirements of customers, to perform designated functions. Thus, if different customers require different functions in the same type of embedded devices, manufacturers of the embedded devices must develop different software programs according to the differing requirements of the different customers, and then embed the software programs in the same type of hardware. It is inconvenient and inefficient for manufacturers to have to manage the various software programs.
Therefore, a heretofore unaddressed need exists in the industry to overcome the aforementioned deficiencies and inadequacies.
An exemplary embodiment of the present invention provides a function selection system for selecting functions in an embedded system. The function selection system includes a firmware module, a customer data module, and a querying interface. The firmware module includes a plurality of programs for performing different functions. The customer data module is used for saving customer data. The customer data includes statuses of the different functions performed by the firmware module according to the different function requirements of different customers. The querying interface is used for querying the customer data in the customer data module according to a request received by the firmware module for performing a particular function, and for generating a corresponding instruction according to a querying result.
An exemplary function selection method is also provided. The function selection method includes the steps of: receiving a request for performing a particular function; sending the request to a querying interface; querying customer data in a customer data module; and generating an instruction according to a querying result, and sending the instruction to a piece of firmware.
Thus a manufacturer of embedded devices can modify customer data in the customer data module, according to the requirements of different customers for different functions in the same firmware module. Therefore the manufacturer can save time on developing and handling software programs, and can conveniently manage the software.
Other advantages and novel features will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
The customer data module 30 is used for saving customer data. The customer data, written by a manufacturer, comprises the statuses of all functions performed by the firmware module 10 according to the different function requirements of different customers. The status for each function includes an enabled status and a disabled status.
Each data segment includes a type segment 31 and a status segment 35. The type segment 31 represents a function, and is defined by the manufacturer. When the manufacturer provides embedded systems with the function selection system 1 to different customers, the type segment 31 of the data segments are the same. The status segment 35 comprises a value of the type segment 31, and shows the status of the function represented by the type segment 31. In the exemplary embodiment, the status of the function represented by the type segment 31 includes an enabled status and a disabled status. The status segment 35 is defined by the manufacturer according to the function requirements of a particular customer. When the manufacturer provides the embedded system with the function selection system 1 to different customers, the status segments 35 of the same data segments may be different. In the exemplary embodiment, the enabled status is represented by “0,” and the disabled status is represented by “1.” In another embodiment, the enabled status is represented by “1,” and the disabled status is represented by “0.”
The customer data obtained by different customers are described in detail as follows. In the exemplary embodiment, when the manufacturer provides the embedded systems with the function selection system 1 to different customers with different function requirements, the modules of the function selection system 1 in the embedded systems of each customer are the same except for the customer data module 30. Suppose that the firmware module 10 has four available functions, a, b, c and d. The customer data in the customer data module 30 will then have four data segments, a, b, c and d.
In the exemplary embodiment, when a first customer needs to perform functions a and b, a second customer needs to perform functions b, c and d, and a third customer needs to perform functions a, b, c and d, the only difference in the three customers' respective function selection systems 1 is the status segments 35 thereof.
In the exemplary embodiment, the enabled status is represented by “0,” and the disabled status is represented by “1.” Thus the status segments 35 of the four data segments a, b, c, and d of the customer data of the first customer are respectively represented by 0, 0, 1 and 1. The status segments 35 of the four data segments a, b, c, and d of the customer data of the second customer are respectively represented by 1, 0, 0, 0. The status segments 35 of the four data segments a, b, c, and d of the customer data of the third customer are respectively represented by 0, 0, 0, 0.
When a customer needs to change their selection of available functions of the embedded system with the function selection system 1, the customer need only change the status segments 35 of the data segments corresponding to the functions that need to be changed. For instance, if the first customer needs to add function c and function d, and to disable function b, the status segment 35 of the data segment b can be changed to 1, and the status segments 35 of the data segments c and d can be both be changed to 0. Thus, the functions of the embedded system of the first customer are changed accordingly.
The querying interface 20 queries and analyses the customer data in the customer data module 30 according to a request received by the firmware module 10 for performing a function, and then generates a corresponding instruction. When the embedded system with the function selection system 1 is running, if the embedded system needs to perform a function, the embedded system sends a request for performing the function to the firmware module 10 of the function selection system 1. The firmware module 10 sends the request to the querying interface 20. The querying interface 20 first queries the type segments 31 of the customer data in the customer data module 30 to determine whether there is a data segment corresponding to the function. If there is no data segment corresponding to the function, the querying interface 20 generates a skip instruction, and sends the skip instruction to the firmware module 10. If there is a data segment corresponding to the function, the querying interface 20 queries the status segment 35 of the data segment corresponding to the function in order to determine whether the function is enabled or disabled. If the function is enabled, the querying interface 20 generates an instruction for performing a function corresponding to the data segment in the firmware module 10, and sends the instruction to the firmware module 10. If the function is disabled, the querying interface 20 generates a skip instruction, and sends the skip instruction to the firmware module 10.
In step S408, the querying interface 20 generates an instruction according to the querying result, and sends the instruction to the firmware module 10 to process. If the querying result is that there is no data segment corresponding to the function, or the querying result is that there is a data segment corresponding to the function but the function is disabled, the querying interface 20 generates a skip instruction, and sends the skip instruction to the firmware module 10. If the querying result is that there is a data segment corresponding to the function and the function is enabled, the querying interface 20 sends an instruction to perform that function to the firmware module 10.
The firmware module 10 of the function selection system 1 includes programs that can perform different functions to meet different customers' needs. Accordingly, the manufacturer can change the availability of the various functions to match the customers' needs by simply adjusting the statuses of the functions in the status segments 35 of the customer data in the customer data modules 30. Thus, it is easy and convenient for the manufacturer to manage the software of embedded systems.
While various embodiments have been described above, it should be understood that they have been presented by way of example only and not by way of limitation. Thus the breadth and scope of the present invention should not be limited by the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 200510034988.4 | May 2005 | CN | national |
