Circuit and method for adjusting bootloader startup address

Abstract

The invention discloses a circuit and method for adjusting a BootLoader starting address, and relates to the field of BootLoaders. The circuit comprises a processor and a concurrent Flash. The processor is respectively connected with the concurrent Flash through a control line, a data line and an address line. The circuit further comprises a complex programmable logic device. An inner circuit of the complex programmable logic device comprises an address controller and an output controllable address latch; a bus reader-writer and a control register are arranged inside the address controller; the processor is connected with the bus reader-writer and the output controllable address latch; the output controllable address latch is connected with the concurrent Flash; the address controller is connected with the output controllable address latch through the control line. When being used in an embedded operation system platform of concurrent Flashes with various different capacities, the circuit is relatively easy to operate, and relatively low in production and maintenance cost.

Description

technical field [0001] The invention relates to the field of embedded system design, in particular to a circuit and method for adjusting the boot address of a BootLoader (boot loader). Background technique [0002] Before the embedded operating system works, it is first necessary to run the boot loader to complete the initialization of the embedded operating system hardware, and then the embedded operating system can be loaded into the memory, and the embedded operating system starts to work. When loading BootLoader, the processor of the embedded operating system will enter the reset interrupt after power-on, and the program instruction of the processor of the embedded operating system jumps from the interrupt entry to a fixed startup address of the BootLoader, and initializes from the startup address Work. [0003] At present, the processor of the embedded operating system generally burns the startup address of the BootLoader in a fixed position near the end of the paralle...

AI Technical Summary

Problems solved by technology

Therefore, when using multiple parallel Flashes with different capacities on the embedded operating system platform, it is necessary to modify and compile multiple sets of BootLoader program codes. Because there are many software versions of multiple sets of BootLoader program codes, it is more difficult for the software to be maintained, and Multiple sets of BootLoader programs need to be burned in different positions of the parallel Flash, and it is easy to burn the BootLoader program code in the wrong position

[0004] To sum up, when burning multiple sets of BootLoader programs on parallel Flash, the production and management are more troublesome, and it is more difficult to maintain multiple sets of BootLoader programs, and the management cost of maintaining and managing multiple sets of BootLoader program codes is high

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