/**
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/**
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* Demonstrates the functionality of the UART observer. Shows the 64 bits of
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* Demonstrates the functionality of the UART observer. Reads 64 bits from the terminal keyboard.
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* binary data that, in this demo, are derived from push buttons and dip switches on FPGA board.
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*/
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*/
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module uart_observer_demonstrator (
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module uart_observer_demonstrator (
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input USB_UART_TX_FPGA_RX_LS,
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input USB_UART_TX_FPGA_RX_LS,
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input USB_UART_CTS_I_B_LS,
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input USB_UART_CTS_I_B_LS,
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input CLK_I,
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input CLK_I,
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input GPIO_SW_E,
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input GPIO_SW_E,
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input GPIO_SW_W,
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input GPIO_SW_W,
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input GPIO_SW_S,
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input GPIO_SW_S,
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input GPIO_SW_N,
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input GPIO_SW_N,
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input GPIO_SW_C,
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input GPIO_SW_C,
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input GPIO_DIP_SW0,
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input GPIO_DIP_SW0,
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input GPIO_DIP_SW1,
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input GPIO_DIP_SW1,
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input GPIO_DIP_SW2,
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input GPIO_DIP_SW2,
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input GPIO_DIP_SW3,
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input GPIO_DIP_SW3,
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output GPIO_LED_0,
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output GPIO_LED_0,
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output GPIO_LED_1,
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output GPIO_LED_1,
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output GPIO_LED_2,
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output GPIO_LED_2,
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output GPIO_LED_3,
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output GPIO_LED_3,
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output GPIO_LED_4,
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output GPIO_LED_4,
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output GPIO_LED_5,
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output GPIO_LED_5,
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output GPIO_LED_6,
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output GPIO_LED_6,
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output GPIO_LED_7,
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output GPIO_LED_7,
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output USB_UART_RX_FPGA_TX_LS,
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output USB_UART_RX_FPGA_TX_LS,
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output USB_UART_RTS_O_B_LS
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output USB_UART_RTS_O_B_LS
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);
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);
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// 64 bits we observe.
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// 32 bits we observe.
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wire [63:0] observables;
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wire [31:0] observables;
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// Observe the switches as example
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uart_receiver #(.CLOCK_FREQ (90_000_000), .BAUDS(921600), .BITS(32) )
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// First byte
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UR(
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// Clock
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assign observables[0] = GPIO_SW_E;
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.CLK_I(CLK_I),
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assign observables[1] = GPIO_SW_W;
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assign observables[2] = GPIO_SW_S;
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assign observables[3] = GPIO_SW_N;
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assign observables[4] = GPIO_SW_E;
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assign observables[5] = GPIO_SW_W;
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assign observables[6] = GPIO_SW_S;
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assign observables[7] = GPIO_SW_N;
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// Second
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assign observables[8] = GPIO_SW_E;
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assign observables[9] = GPIO_SW_W;
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assign observables[10] = GPIO_SW_S;
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assign observables[11] = GPIO_SW_N;
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assign observables[12] = GPIO_SW_E;
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assign observables[13] = GPIO_SW_W;
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assign observables[14] = GPIO_SW_S;
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assign observables[15] = GPIO_SW_N;
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// Third
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assign observables[16] = GPIO_DIP_SW0;
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assign observables[17] = GPIO_DIP_SW1;
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assign observables[18] = GPIO_DIP_SW2;
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assign observables[19] = GPIO_DIP_SW3;
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assign observables[20] = GPIO_DIP_SW3;
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assign observables[21] = GPIO_DIP_SW2;
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assign observables[22] = GPIO_DIP_SW1;
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assign observables[23] = GPIO_DIP_SW0;
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// Forth
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assign observables[24] = GPIO_SW_E;
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assign observables[25] = GPIO_SW_W;
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assign observables[26] = GPIO_SW_S;
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assign observables[27] = GPIO_SW_N;
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assign observables[28] = GPIO_SW_E;
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// Values to observer
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assign observables[29] = GPIO_SW_W;
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.DAT_O(observables),
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assign observables[30] = GPIO_SW_S;
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assign observables[31] = GPIO_SW_N;
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assign observables[63] = GPIO_SW_C;
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// UART
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.RXD(USB_UART_TX_FPGA_RX_LS), // data
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.CTR(USB_UART_CTS_I_B_LS) // clear to receive
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);
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uart_observer #(.CLOCK_FREQ (90_000_000), .BAUDS(921600), .BITS(64) )
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uart_observer #(.CLOCK_FREQ (90_000_000), .BAUDS(921600), .BITS(32) )
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U0(
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U0(
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// Clock
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// Clock
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.CLK_I(CLK_I),
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.CLK_I(CLK_I),
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// Values to observer
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// Values to observer
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.DAT_I(observables),
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.DAT_I(observables),
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// UART
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// UART
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.TXD(USB_UART_RX_FPGA_TX_LS), // data
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.TXD(USB_UART_RX_FPGA_TX_LS), // data
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.RTS(USB_UART_RTS_O_B_LS), // request to send
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.RTS(USB_UART_RTS_O_B_LS), // request to send
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.CTS(USB_UART_CTS_I_B_LS) // clear to send
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.CTS(USB_UART_CTS_I_B_LS) // clear to send
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);
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);
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assign GPIO_LED_0 = observables[0];
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assign GPIO_LED_0 = observables[0];
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assign GPIO_LED_1 = observables[1];
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assign GPIO_LED_1 = observables[1];
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assign GPIO_LED_2 = observables[2];
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assign GPIO_LED_2 = observables[2];
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assign GPIO_LED_3 = observables[3];
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assign GPIO_LED_3 = observables[3];
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assign GPIO_LED_4 = observables[4];
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assign GPIO_LED_4 = observables[4];
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endmodule
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endmodule
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