SPI communication principle is very simple, it is the work of master-slave mode, this mode usually has a master device and one or more from the device, requires at least four lines, in fact, 3 can also be (one-way transmission). SPI-based devices are all common, they are SDI (data entry), SDO (data output), SCK (clock), CS (chip select).

互为主从\STC12C5628AD\ASM\SPIDemo
........\............\...\SPIDemo.asm
........\............\...\SPIDemo.hex
........\............\...\SPIDemo.lnp
........\............\...\SPIDemo.LST
........\............\...\SPIDemo.M51
........\............\...\SPIDemo.OBJ
........\............\...\SPIDemo.Opt
........\............\...\SPIDemo.plg
........\............\...\SPIDemo.Uv2
........\............\...\SPIDemo_Opt.Bak
........\............\...\SPIDemo_Uv2.Bak
........\............\C\SPIDemo
........\............\.\SPIDemo.c
........\............\.\SPIDemo.hex
........\............\.\SPIDemo.lnp
........\............\.\SPIDemo.LST
........\............\.\SPIDemo.M51
........\............\.\SPIDemo.OBJ
........\............\.\SPIDemo.Opt
........\............\.\SPIDemo.plg
........\............\.\SPIDemo.Uv2
........\............\.\SPIDemo_Opt.Bak
........\............\.\SPIDemo_Uv2.Bak
........\.......A60S2\ASM\SPIDemo
........\............\...\SPIDemo.asm
........\............\...\SPIDemo.hex
........\............\...\SPIDemo.lnp
........\............\...\SPIDemo.LST
........\............\...\SPIDemo.M51
........\............\...\SPIDemo.OBJ
........\............\...\SPIDemo.Opt
........\............\...\SPIDemo.plg
........\............\...\SPIDemo.Uv2
........\............\...\SPIDemo_Opt.Bak
........\............\...\SPIDemo_Uv2.Bak
........\............\C\SPIDemo
........\............\.\SPIDemo.c
........\............\.\SPIDemo.hex
........\............\.\SPIDemo.lnp
........\............\.\SPIDemo.LST
........\............\.\SPIDemo.M51
........\............\.\SPIDemo.OBJ
........\............\.\SPIDemo.Opt
........\............\.\SPIDemo.plg
........\............\.\SPIDemo.Uv2
........\............\.\SPIDemo_Opt.Bak
........\............\.\SPIDemo_Uv2.Bak
单主单从\STC12C5628AD\ASM\Master
........\............\...\Master.hex
........\............\...\Master.lnp
........\............\...\Master.M51
........\............\...\Master.Opt
........\............\...\Master.plg
........\............\...\Master.Uv2
........\............\...\Master_Opt.Bak
........\............\...\Master_Uv2.Bak
........\............\...\Slave
........\............\...\Slave.hex
........\............\...\Slave.lnp
........\............\...\Slave.M51
........\............\...\Slave.Opt
........\............\...\Slave.plg
........\............\...\Slave.Uv2
........\............\...\Slave_Opt.Bak
........\............\...\Slave_Uv2.Bak
........\............\...\SPIDemo.asm
........\............\...\SPIDemo.LST
........\............\...\SPIDemo.OBJ
........\............\C\Master
........\............\.\Master.hex
........\............\.\Master.lnp
........\............\.\Master.M51
........\............\.\Master.Opt
........\............\.\Master.plg
........\............\.\Master.Uv2
........\............\.\Master_Opt.Bak
........\............\.\Master_Uv2.Bak
........\............\.\Slave
........\............\.\Slave.hex
........\............\.\Slave.lnp
........\............\.\Slave.M51
........\............\.\Slave.Opt
........\............\.\Slave.plg
........\............\.\Slave.Uv2
........\............\.\Slave_Opt.Bak
........\............\.\Slave_Uv2.Bak
........\............\.\SPIDemo.c
........\............\.\SPIDemo.LST
........\............\.\SPIDemo.OBJ
........\.......A60S2\ASM\Master
........\............\...\Master.hex
........\............\...\Master.lnp
........\............\...\Master.M51
........\............\...\Master.Opt
........\............\...\Master.plg
........\............\...\Master.Uv2
........\............\...\Master_Opt.Bak
........\............\...\Master_Uv2.Bak
........\............\...\Slave

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