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| author | Aleksa Vučković <aleksav013@gmail.com> | 2022-01-21 21:44:28 +0100 |
|---|---|---|
| committer | Aleksa Vučković <aleksav013@gmail.com> | 2022-01-21 23:24:55 +0100 |
| commit | a914c37365967afaf3148293a857c36af6f94ecb (patch) | |
| tree | b7086b0b0b6e4bf427210fcfd31c7745920a73a5 /src/c/timer.c | |
| parent | ed84017353c6fc9421b223ff6ec62f8d881d8098 (diff) | |
Separating assembly, moving #defines to .h & cleaning Makefile
Diffstat (limited to 'src/c/timer.c')
| -rw-r--r-- | src/c/timer.c | 10 |
1 files changed, 0 insertions, 10 deletions
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); } |
