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
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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