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  1.  
  2.         cli();
  3.         uint32_t offset1 = offset;
  4.         uint16_t tcnt = TCNT1;
  5.         __sync_synchronize();
  6.         if (TIFR1 & (1 << TOV1)) {
  7.             // overflow happened, deal with it here and relieve the ISR from it
  8.             offset += UINT32_C(0x10000);
  9.             TIFR1 |= (1 << TOV1); // writing the flag clears it
  10.             offset1 = offset;
  11.             tcnt = TCNT1;
  12.         }
  13.         sei();
  14.         return (offset1 + tcnt);
  15.  
  16.  
  17.  
  18.  
  19.         cli();
  20.         uint32_t offset1 = offset;
  21.         uint16_t tcnt = TCNT1;
  22.         __sync_synchronize();
  23.         if (TIFR1 & (1 << TOV1)) {
  24.             // overflow happened, let the interrupt handle it
  25.             sei();
  26.             cli();
  27.             offset1 = offset;
  28.             tcnt = TCNT1;
  29.         }
  30.         sei();
  31.         return (offset1 + tcnt);
  32.  
Not running #stdin #stdout 0s 0KB
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https://ideone.com/PQwtzd
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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