| import cocotb |
| from cocotb.triggers import RisingEdge, ReadOnly |
| from cocotb_coverage.coverage import * |
| |
| # auxiliary relation function to define bins matching within a range |
| range_relation = lambda val_, bin_ : bin_[0] <= val_ <= bin_[1] |
| |
| class FractionalNStatus(): |
| """ |
| Object representing modulator status |
| """ |
| def __init__(self, dut): |
| self.dut = dut |
| |
| # @cocotb.coroutine |
| def update(self): |
| self.divide_value = int(self.dut.divide_value) |
| |
| |
| #functional coverage - check that the DUT is getting suitably interacted with |
| FractionalNCoverage = coverage_section ( |
| CoverPoint( |
| name = "top.divide_value", |
| xf = lambda dut, status, divide_value : status.divide_value, |
| rel = range_relation, |
| bins = [(0,int(2**10*1/3)-1), (int(2**10*1/3),int(2**10*2/3)-1), (int(2**10*2/3),int(2**10-1))], |
| bins_labels = ["low", "med", "high"] |
| ) |
| ) |
| |
| |
| # procedure of processing data |
| # coverage sampled here - at each function call |
| @FractionalNCoverage |
| async def new_divider_value(dut, status, divide_value): |
| |
| # provide new data and read old |
| dut.divide_value <= divide_value |
| await RisingEdge(dut.input_frequency) |
