Clock does not exist! Use timer. #5

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2019-03-07T15:17:06+01:00

Ruakij commented

2019-03-07 15:17:06 +01:00

(Migrated from gitea.railduction.eu)

Because we cannot use clock() and clock_t, because it does not exist in the library timer.h, we have to use an internal timer.

The timer should be precise enough to measure differences reliably up to 20kHz
(Example stepping: Half-Period-Time / 5)

Because we cannot use clock() and clock_t, because it does not exist in the library timer.h, we have to use an internal timer. The timer should be precise enough to measure differences reliably up to 20kHz (Example stepping: Half-Period-Time / 5)

Ruakij commented

2019-03-07 19:01:42 +01:00

(Migrated from gitea.railduction.eu)

Example timer code:

// Using timer1 (16-bit)

TCCR1B |= (1 << CS10); // This sets the prescaler

TCNT1 = 0; // initialize counter

Outside can then TCNT1 be used as variable.

The timer will count up to 2^16 = 65536-1 and then overflows to 0

Still todo:

Check effects of overflowing nextTick and overflowing timer

Example timer code: <code>// Using timer1 (16-bit)</code> <code>TCCR1B |= (1 << CS10); // This sets the prescaler</code> <code>TCNT1 = 0; // initialize counter</code> Outside can then <code>TCNT1</code> be used as variable. The timer will count up to <code>2^16 = 65536-1</code> and then overflows to 0 Still todo: - Check effects of overflowing nextTick and overflowing timer

Ruakij commented

2019-03-08 08:42:38 +01:00

(Migrated from gitea.railduction.eu)

16-bit timer is now implemented

Still Todo:

Check timer variable if its signed or unsigned

16-bit timer is now implemented Still Todo: - Check timer variable if its signed or unsigned

Ruakij commented

2019-03-11 10:50:46 +01:00

(Migrated from gitea.railduction.eu)

Timer fully implemented

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Reference: Ruakij/Geigercounter#5