From a914c37365967afaf3148293a857c36af6f94ecb Mon Sep 17 00:00:00 2001 From: Aleksa Vučković Date: Fri, 21 Jan 2022 21:44:28 +0100 Subject: Separating assembly, moving #defines to .h & cleaning Makefile --- src/c/timer.c | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'src/c/timer.c') diff --git a/src/c/timer.c b/src/c/timer.c index 412e443..3a8f159 100644 --- a/src/c/timer.c +++ b/src/c/timer.c @@ -13,7 +13,6 @@ void timer_handler(void) tick++; if(tick==TICKS_PER_SECOND) { - //printf("%d seconds passed\n",time); tick=0; time++; } @@ -24,21 +23,12 @@ void timer_handler(void) void init_timer(uint32_t frequency) { - // Firstly, register our timer callback. - - // The value we send to the PIT is the value to divide it's input clock - // (1193180 Hz) by, to get our required frequency. Important to note is - // that the divisor must be small enough to fit into 16-bits. uint32_t divisor = 1193180 / frequency; - - // Send the command byte. ioport_out(0x43, 0x36); - // Divisor has to be sent byte-wise, so split here into upper/lower bytes. uint8_t l = (uint8_t)(divisor & 0xFF); uint8_t h = (uint8_t)( (divisor>>8) & 0xFF ); - // Send the frequency divisor. ioport_out(0x40, l); ioport_out(0x40, h); } -- cgit v1.2.3