"D:/Xilinux/Lab4/UART/uart_controller.v" Line 60: Target <uart_read_data> of concurrent assignment or output port connection should be a net type. "D:/Xilinux/Lab4/UART/uart_controller.v" Line 61: Target <uart_data_ready> of concurrent assignment or output port connection should be a net type. "D:/Xilinux/Lab4/UART/uart_controller.v" Line 65: Target <uart_tx_ready> of concurrent assignment or output port connection should be a net type.