parameter BAUD = 9600, parameter WL = 32, DEPTH = 1024, parameter OutWordSize = WL, parameter numOutputTransmissions = (OutWordSize + 8 - 1) / 8, parameter finalTransmissionBits = 8 - ((8 * numOutputTransmissions) - OutWordSize)) (input CLK100MHZ, input uart_txd_in, output uart_rxd_out, input GPIO_BTN_0);