human
I am working on the file "PYNQLearn/FabricOnly/.ipynb_checkpoints/myHDL_PYNQZ12_FabricOnly-checkpoint.ipynb".
The first task is:
PYNQ-Z1 Constraints File
Below is what is found in file constrs_S0L0.xdc
Notice that the orgianl port names found in the PYNQ-Z1 Constraints file have been changed to the port names of the module S0L0
Verilog Testbench
Can you write Python program for it?
 ... Can you provide a found in file constrs_S0L0?
assistant
#Here is found in file constrs_S0L0.

@block
def BDCLed_TBV():

    clk=Signal(bool(0))
    led=Signal(intbv(0)[4:])
    
    @always_comb
    def print_data():
        print(sw, clk, led)

    DUT=BDCLed(clk, led)
    
    
    @instance
    def clk_signal():
        while True:
            clk.next = not clk
            yield delay(1)
        
    @instance
    def stimules():
        i=0
        while True:
            if i==1000:
                raise StopSimulation()
            i+=1
            yield clk.posedge
    
    return instances()
            
TB=BDCLed_TBV()
TB.convert(hdl="Verilog", initial_values=True)
VerilogTextReader('BDCLed_TBV');