Software for fpga and Pc

Hello, I have a device which is made to produce and emit 320 frequencies simultaneously. The main chip is a xilinx fpga. Each Pcb has 4 fpga's and can be connected through a usb cable with the pc. The pc software can upload to the device txt files which contains numbers and these numbers are the frequencies. The project: New software for the fpga and pc, so i can type a number in a textbox and with a button "send" upload it to the device directly and emits it. If i write a second number in the textbox, the software should send them both to the device and emits them. Like this i can type up to 320 different numbers "frequencies" and emits them all. In the photo you can see the pcb. I don't have any source code to help you.