kopia lustrzana https://github.com/peterhinch/micropython-samples
33 wiersze
950 B
Python
33 wiersze
950 B
Python
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import pyb, mutex
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mutex = mutex.Mutex()
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def update(t): # Interrupt handler may not be able to acquire the lock
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global var1, var2 # if main loop has it
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if mutex.test(): # critical section start
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var1 += 1
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pyb.udelay(200)
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var2 += 1
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mutex.release() # critical section end
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def main():
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global var1, var2
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var1, var2 = 0, 0
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t2 = pyb.Timer(2, freq = 995, callback = update)
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t4 = pyb.Timer(4, freq = 1000, callback = update)
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for x in range(1000000):
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with mutex: # critical section start
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a = var1
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pyb.udelay(200)
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b = var2
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result = a == b # critical section end
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if not result:
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print('Fail after {} iterations'.format(x))
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break
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pyb.delay(1)
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if x % 1000 == 0:
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print(x)
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t2.deinit()
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t4.deinit()
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print(var1, var2)
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