Embedded 192x64 serial dot matrix Chinese LCD screen application

FV19264SA Embedded Serial Port Chinese LCD Control Module Data Transfer Protocol Definition

Send data format (main board -> FV19264SA):

Command Head + Length Word + Command Word + Data Field + Check Word

Command header: four bytes, 0x55xAA, 0xFF, 0x00

Length word: One byte, indicating the number of bytes of the command starting from the length word to the check word

Command word: two bytes

Embedded 192x64 serial dot matrix Chinese LCD screen application

Data field: This item can be empty

Check Word: One byte, byte-by-byte XOR value from the command header to the last byte of the data field

Return data format (FV19264SA -> Main Control Board):

Success: Command Head + Length Word + Identification Word (or Data Field) + Check Word

Command header: four bytes, 0x55xAA, 0xFF, 0x00

Length word: One byte, indicating the number of bytes of the command starting from the length word to the check word

Identification word: One byte. If it is FF, it means successful response. If there is data returned, there is no identifier.

Data field: This item can be empty

Check Word: One byte, byte-by-byte XOR value from the command header to the last byte of the data field

UART communication format (All numbers in this document are hexadecimal)

Asynchronous half duplex, 115200, n, 8, 1 (baud rate, parity, data bits, stop bits)

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