A realization of a serial extension of the realization of the four serial procedures, the use of the main chip 51, the expansion of the four sub-serial, sub-serial chip VK32, 51 and sub SPI communication between the serial port. All code in the product authentication through.

Packet : 71477200serial1to4.zip filelist
source code/
source code/def.h
source code/main.c
source code/spi.c
source code/spi.h
source code/vk32.c
source code/vk32.h

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