Automatic burning method of flash mirror image based on TF starting card

Abstract

The invention relates to the technical field of flash burning, in particular to an automatic burning method of a flash mirror image based on a TF starting card. According to the method, in an embedded Linux system, the TF starting card is manufactured, and equipment is started through the TF starting card; when the equipment is started, a system kernel in a partition P2 of the TF starting card is operated by a system, mounting of a root file system in a partition P3 is carried out, then mounting of a partition P1 is carried out in the root file system, a system kernel and a root file system in the partition P1 are automatically burnt to a partition corresponding to flash, bulk burning can be carried out, the burning process can be greatly simplified, and burning efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of flash programming, in particular to a method for automatically programming a flash image based on a TF boot card. Background technique [0002] Flash is used more and more widely in embedded systems, because flash has the advantages of high capacity, high stability and fast read and write, so flash has become the mainstream medium, but because the embedded design has been involved in linux and WINCE A large number of operating systems make this file huge, so programming the file into the flash encounters a programming bottleneck. In the past flash programming, the first step is to use JTAG to program the bootloader, so that the minimum system loads the bootloader and initializes each communication port (such as serial port, network card, etc.), and then downloads the linux kernel from the serial port to establish a file system, and then It is realized by downloading the linux application program through ...

AI Technical Summary

Problems solved by technology

As JTAG and serial port are serial input, they are also affected by the speed of their related chips (the speed of the MAX232 chip is much slower than the read and write speed of flash), although the bootloader+linux kernel file is only 1 / 3 of the application program content. 8. However, the total programming time is 8 times the application program time, which makes the entire flash programming time extremely long, and before the bootloader is programmed, the serial port and the network port cannot communicate with the host computer. On the premise of not programming the linux kernel, although the network port can communicate with the host, the boot file of the entire system does not exist in the specified location due to the failure of the file system arrangement, resulting in the failure to start linux.

If you use multiple serial ports to communicate with the computer, it is a good choice on the surface, but a computer only has 2 serial ports. If you expand one serial port into multiple serial ports, it may cause errors in the feedback signal from the lower computer to the upper computer ( Maybe one of the lower computers is ready, but there is another one that has not been written, and the feedback to the upper computer is programmed), so this method will not work

[0003] In the embedded Linux system, the flash partition is completed at the kernel startup stage, which requires that when programming a system with different flash partition configurations, the host computer software must be configured differently, and the configuration of each partition requires commissioning personnel After downloading the software by connecting the serial port and the network port, and then programming the program, it is necessary to repeatedly plug and unplug the serial cable, network cable and switching power supply, resulting in a low degree of automation in the program programming process

Especially when programming in batches, if manual programming is used, it will not only consume a lot of manpower and material resources, but also the configuration is cumbersome, and the programming efficiency is extremely low

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