Embedded system starting method and embedded device

Abstract

The invention discloses an embedded system starting method and an embedded device, which relate to the computer technology. The embedded system starting method comprises the following steps of: after a bootloader on an embedded chip is started, reading a pre-stored configuration file; according to the configuration information in the configuration file, initializing the start frequency of an embedded system; and starting the embedded system by using the initialized start frequency of the embedded system. Because the pre-configured configuration file is read by the bootloader before the start frequency of the embedded system is initialized, and the start frequency of the embedded system is initialized according to parameters in the configuration file, so the start performance of the embedded system is improved.

Description

technical field [0001] The invention relates to computer technology, in particular to an embedded system starting method and an embedded device. Background technique [0002] With the popularity of hand-held terminals such as mobile phones and MP4, users' demand for the functions of such hand-held terminals is also increasing, which requires the embedded system in the hand-held terminal to have more powerful processing capabilities. [0003] When the current embedded system is started, it usually reads the value of register STRAP_PIN[0] first, if the value is 1, execute the program of the external chip SPI (Serial Peripheral Interface, continuous peripheral interface) E2PROM, if the value is 0, Then read the bootloader on the CPU (Central Processing Unit, central processing unit) chip in the SOC (System-On-a-Chip, single-chip system) board and start normally. During normal startup, regardless of whether the processor is the main processor or a coprocessor, it will initializ...

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Problems solved by technology

[0004] The inventor of the present application found that when the current embedded system is started, in order to prevent the startup program from running normally due to excessive frequency, when initializing the frequencies of Pll1, CPU and Bus, they are uniformly initialized to a set of specific frequencies For example, initialize Pll1 to 480M, initialize CPU to 360M, and initialize BUS to 120M. In this way, when the SOC board can start and download at other startup frequencies, the most conservative frequency is still used for startup and download. Affects the startup performance of embedded systems

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