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| author | Josh Rahm <joshuarahm@gmail.com> | 2024-12-04 00:47:54 -0700 |
|---|---|---|
| committer | Josh Rahm <joshuarahm@gmail.com> | 2024-12-04 00:47:54 -0700 |
| commit | 03b84b89f6361df556749a4c73679a6cbcedd28a (patch) | |
| tree | ee5a6569feddc3bc32ab0bdb485affb56d7fafbe | |
| parent | d6d04862de9126d0930ae1f4b95ff6077c6eda63 (diff) | |
| download | ch573-03b84b89f6361df556749a4c73679a6cbcedd28a.tar.gz ch573-03b84b89f6361df556749a4c73679a6cbcedd28a.tar.bz2 ch573-03b84b89f6361df556749a4c73679a6cbcedd28a.zip | |
Implemented listener system for systick.
| -rw-r--r-- | include/systick.h | 9 | ||||
| -rw-r--r-- | linker/ls.ld | 6 | ||||
| -rw-r--r-- | src/main.c | 4 | ||||
| -rw-r--r-- | src/systick.c | 7 |
4 files changed, 26 insertions, 0 deletions
diff --git a/include/systick.h b/include/systick.h index 8933a31..285b9b8 100644 --- a/include/systick.h +++ b/include/systick.h @@ -2,8 +2,17 @@ #include <stdint.h> +typedef void (*systick_cb_t)(void); + void set_systick(uint64_t systick_value); uint64_t get_systick(); int systick_interrupt(); + +#define On_SysTick() \ + static void __local_on_systick__(void); \ + __attribute__(( \ + __section__(".systick_callbacks"))) static volatile systick_cb_t \ + __FILE__##__LINE__ = __local_on_systick__; \ + static void __local_on_systick__() diff --git a/linker/ls.ld b/linker/ls.ld index 4ac7dc6..08e1901 100644 --- a/linker/ls.ld +++ b/linker/ls.ld @@ -36,6 +36,12 @@ SECTIONS CLOCK_CHANGE_LISTENERS_END = .; } > flash AT>flash + .systick_callbacks : ALIGN(0x04) { + SYSTICK_LISTENERS_START = .; + KEEP(*(.systick_callbacks)); + SYSTICK_LISTENERS_END = .; + } > flash AT>flash + ISR_VECTOR_IN_FLASH = LOADADDR(.isr_vector); .isr_vector : ALIGN(0x04) { ISR_VECTOR_START = .; @@ -250,3 +250,7 @@ int main(void) return 0; } + +On_SysTick() { + printf("Systick BOI!\n"); +} diff --git a/src/systick.c b/src/systick.c index 506f6df..3cd7bfa 100644 --- a/src/systick.c +++ b/src/systick.c @@ -28,7 +28,14 @@ int systick_interrupt() return SYSTICK_I.counter_interrupt_flag.get(SYSTICK); } +extern systick_cb_t SYSTICK_LISTENERS_START; +extern systick_cb_t SYSTICK_LISTENERS_END; IRQ(systick) { + systick_cb_t* cur = &SYSTICK_LISTENERS_START; + while (cur != &SYSTICK_LISTENERS_END) { + (*cur)(); + ++cur; + } SYSTICK_I.counter_interrupt_flag.set(SYSTICK, 0); } |