Subversion Repositories uart_observer

/**

* Demonstrates the functionality of the UART observer.  Shows the 64 bits of

* binary data that, in this demo, are derived from push buttons and dip switches on FPGA board.

*/

module uart_observer_demonstrator (

  input USB_UART_TX_FPGA_RX_LS,

  input USB_UART_CTS_I_B_LS,

  input CLK_I,

  input GPIO_SW_E,

  input GPIO_SW_W,

  input GPIO_SW_S,

  input GPIO_SW_N,

  input GPIO_SW_C,

  input GPIO_DIP_SW0,

  input GPIO_DIP_SW1,

  input GPIO_DIP_SW2,

  input GPIO_DIP_SW3,

  output GPIO_LED_0,

  output GPIO_LED_1,

  output GPIO_LED_2,

  output GPIO_LED_3,

  output GPIO_LED_4,

  output GPIO_LED_5,

  output GPIO_LED_6,

  output GPIO_LED_7,

  output USB_UART_RX_FPGA_TX_LS,

  output USB_UART_RTS_O_B_LS

);

 // 64 bits we observe.

 wire [63:0] observables;

 // Observe the switches as example

 // First byte

 assign observables[0] = GPIO_SW_E;

 assign observables[1] = GPIO_SW_W;

 assign observables[2] = GPIO_SW_S;

 assign observables[3] = GPIO_SW_N;

 assign observables[4] = GPIO_SW_E;

 assign observables[5] = GPIO_SW_W;

 assign observables[6] = GPIO_SW_S;

 assign observables[7] = GPIO_SW_N;

 // Second

 assign observables[8] = GPIO_SW_E;

 assign observables[9] = GPIO_SW_W;

 assign observables[10] = GPIO_SW_S;

 assign observables[11] = GPIO_SW_N;

 assign observables[12] = GPIO_SW_E;

 assign observables[13] = GPIO_SW_W;

 assign observables[14] = GPIO_SW_S;

 assign observables[15] = GPIO_SW_N;

 // Third

 assign observables[16] = GPIO_DIP_SW0;

 assign observables[17] = GPIO_DIP_SW1;

 assign observables[18] = GPIO_DIP_SW2;

 assign observables[19] = GPIO_DIP_SW3;

 assign observables[20] = GPIO_DIP_SW3;

 assign observables[21] = GPIO_DIP_SW2;

 assign observables[22] = GPIO_DIP_SW1;

 assign observables[23] = GPIO_DIP_SW0;

 // Forth

 assign observables[24] = GPIO_SW_E;

 assign observables[25] = GPIO_SW_W;

 assign observables[26] = GPIO_SW_S;

 assign observables[27] = GPIO_SW_N;

 assign observables[28] = GPIO_SW_E;

 assign observables[29] = GPIO_SW_W;

 assign observables[30] = GPIO_SW_S;

 assign observables[31] = GPIO_SW_N;

 assign observables[63] = GPIO_SW_C;

 uart_observer #(.CLOCK_FREQ (90_000_000), .BAUDS(921600), .BITS(64) )

 U0(

  // Clock

  .CLK_I(CLK_I),

  // Values to observer

  .DAT_I(observables),

  // UART

  .TXD(USB_UART_RX_FPGA_TX_LS), // data  

  .RTS(USB_UART_RTS_O_B_LS),    // request to send

  .CTS(USB_UART_CTS_I_B_LS)    // clear to send

 );

 assign GPIO_LED_0 = observables[0];

 assign GPIO_LED_1 = observables[1];

 assign GPIO_LED_2 = observables[2];

 assign GPIO_LED_3 = observables[3];

 assign GPIO_LED_4 = observables[4];

endmodule