Introduction - If you have any usage issues, please Google them yourself
Silicon labs for the C8051F020 mcu full-duplex SPI master device debugging some of the procedures, its received from the device (also F020mcu) packets will be sent from the serial port 1 to PC, from the serial port can be seen aides. development environment for KeilC, the need for U-EC3 emulator downloaded to mcu in order to debug.