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Many applications need communication with computer through common port ,the traditional
connector is RS232 which need to connect to RS232 cable. But today many personal computers
don't have the RS232 connector which makes it very inconvenient to develop some projects. The
C5G board was designed to support UART communication through USB cable. The UART to USB
circuit is responsible for convert the data format. Developers can use a usb cable rather than a
RS232 cable to make the FPGA communicate with computer. In this demonstration we will show
you how to control the leds by sending command on computer putty terminal. The command is sent
and received through usb cable to the FPGA. But in FPGA ,the information was received and sent
through a UART IP.
shows the hardware block diagram of this demonstration. The system requires a 50 MHz
clock provided from the board. The PLL generates a 100MHz clock for Nios II processor and the
controller IP. The LEDs ard controlled by the PIO IP. The UART controller send and receive
command data . Command is sent through Putty terminal on computer.
