From 7eb87bf3f3fa6226657a7106eb255cbfa97758d2 Mon Sep 17 00:00:00 2001 From: Miguel Date: Mon, 3 Sep 2018 15:18:16 +0200 Subject: big renaming --- asm/asm_pit.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 asm/asm_pit.h (limited to 'asm/asm_pit.h') diff --git a/asm/asm_pit.h b/asm/asm_pit.h new file mode 100644 index 0000000..d020de1 --- /dev/null +++ b/asm/asm_pit.h @@ -0,0 +1,25 @@ +/** + * @file + * + * PIT - Programmable Interval Timer + * + * config out timer on channel 0 : mode 2 (sys timer) + * * http://en.wikipedia.org/wiki/Intel_8253#Control_Word_Register + * * http://www.brokenthorn.com/Resources/OSDevPit.html + * int0 will be triggered ~25 times a second. + * + * The most magic is performed in pit_interrupt_handler which calls + * the c function responsible for task switching doing vary bad ass + * magic... + */ + +#include + +/** Init PIT - 25 times a second*/ +void asm_pit_init(); + +/** install this interrupt handler to your Interrupt Vector Table */ +void asm_pit_tick(); + +/** get number of ticks */ +uint32_t asm_pit_get_ticks(); -- cgit v1.2.3