Connecting the Blocks

The image shows the following configuration of blocks and connections:

HC_SR04 Block

• Inputs:

• clock: Connected to the system clock signal (Input Pin clk).

• Outputs:

• echo: Connected to the input pin e1 and to the inverter.

• trigger: Connected to output pin e0 (physically triggers the HC-SR04 sensor).

• distance[15:0]: Distance measurement output, sent to uart_tx_16_bit_dec_trigger.

inverterC Block

• Input (A): Receives the echo signal from the HC_SR04.
  
  

• Output (Z): Connects to the inTrigger input of the uart_tx_16_bit_dec_trigger. The inverter ensures that UART transmission occurs after the Echo pulse ends.

uart_tx_16_bit_dec_trigger Block

• Inputs:

• clk: Connected to the system clock (same as HC_SR04).

• inData[15:0]: Connected to the distance output of the HC_SR04.

• separator: Receives a constant value of 1.

• inTrigger: Connected to the inverter output.

• Outputs:

• uartTxPin: UART data output, connected to the uartTx pin.

• txDone: Transmission completion signal, connected to LED led0 to indicate when data has been sent.