mirror of https://github.com/efabless/caravel.git
33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
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# from turtle import st
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from cocotb.triggers import FallingEdge,RisingEdge,ClockCycles
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import cocotb.log
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from cocotb.result import SimTimeoutError
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import cocotb
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import time
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"""class to handle timeout inside the tests. after the provided number of cycles (cycle_num) are exceeded test would fail
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precision would determine when to log timeout warning for example if cycle_num=1000 and percision = 10% so after each 1000*10% = 100 cycle log would be printed
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"""
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class Timeout:
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def __init__(self,clk,cycle_num,precision=0.20):
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self.clk = clk
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self.cycle_num = cycle_num
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self.cycle_precision = precision * cycle_num
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cocotb.scheduler.add(self._timeout_check())
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async def _timeout_check(self):
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number_of_cycles = 0
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for i in range(0,self.cycle_num):
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await ClockCycles(self.clk,1)
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number_of_cycles +=1
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if number_of_cycles %self.cycle_precision ==0:
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cocotb.log.warning(f"simulation are only {self.cycle_num-number_of_cycles} cycles away from TIMEOUT ")
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raise SimTimeoutError(f"simulation exceeds the max number of cycles {self.cycle_num}")
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pass
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