简单的FPGA测试程序，测试软件为Quartus 2. 同根生成方波来测试FPGA是否焊接牢靠，特别是当封装为BGA时。-Simple FPGA test procedures, test software to Quartus 2. The same root FPGA generates a square wave to test whether the welding solid, especially when the time of BGA package.