36 lines
763 B
C
36 lines
763 B
C
#include <internals/timer.h>
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#include <timer.h>
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/*
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timer_start()
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Configures and starts a timer.
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*/
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void timer_start(int timer, int delay, int prescaler, void (*callback)(void),
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int repeats)
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{
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volatile struct mod_tmu *tmu;
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volatile unsigned char *tstr;
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int byte = (1 << timer);
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timer_get(timer, &tmu, &tstr);
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// Loading the counter, the constant and the prescaler/
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tmu->TCOR = delay;
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tmu->TCNT = delay;
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tmu->TCR.TPSC = prescaler;
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// Resetting underflow flag and enabling interruptions.
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tmu->TCR.UNF = 0;
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tmu->TCR.UNIE = 1;
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// Counting on rising edge (ignored on SH7305).
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tmu->TCR.CKEG = 0;
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// Loading the structure information.
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timers[timer].callback = callback;
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timers[timer].repeats = repeats;
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// Starting the timer.
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*tstr |= byte;
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}
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