C51 SPI Code Examples Atmel官方例程，C和汇编都有，很有帮助,C51 SPI Code Examples This section provides the C and Assembler program examples for the SPI applicable to all C51 devices.

C51 程序，程序为SPI通讯的应用及进行按键扫描的软件程序。-C51 procedures, procedures for the SPI for communications applications and software programs scan button.