Method and device for updating firmware program
A firmware program and firmware upgrade technology, which is applied in the field of data communication, can solve problems such as firmware upgrade failure, limited application range, and easily damaged equipment, and achieve the effect of avoiding irreversible damage
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[0047] A method for upgrading firmware programs according to the present invention, its specific implementation method can be divided into two process descriptions of new firmware download and new firmware validity detection and switching, such as figure 1 Shown is the new firmware download process as follows:
[0048] First, define the system flag F, the length is 2 bytes, and the meaning of each bit is as follows:
[0049] Table 1. Bit definition of system flag F
[0050]
[0051] Firmware index (I); represent the address of old and new firmware in Flash;
[0052] Reserved (R): Represented as a reserved bit in the system flag F;
[0053] Failure Count (CNT): Indicates the number of failures to load the main control program for the new firmware.
[0054] Step 11, the main program runs;
[0055] After the device starts normally, the main program works normally;
[0056] Step 12, download new firmware;
[0057] The new firmware is obtained through the serial port or ne...
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