diff options
| -rw-r--r-- | libmaple/systick.c | 2 | ||||
| -rw-r--r-- | libmaple/systick.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/libmaple/systick.c b/libmaple/systick.c index 103893e..c04f4f3 100644 --- a/libmaple/systick.c +++ b/libmaple/systick.c @@ -28,7 +28,7 @@ #include "systick.h" -__io uint32 systick_timer_millis; +volatile uint32 systick_timer_millis; /** * @brief Initialize and enable SysTick. diff --git a/libmaple/systick.h b/libmaple/systick.h index 4654c5f..35b4cb9 100644 --- a/libmaple/systick.h +++ b/libmaple/systick.h @@ -73,7 +73,7 @@ typedef struct systick_reg_map { #define SYSTICK_CVR_TENMS 0xFFFFFF /** System elapsed time, in milliseconds */ -extern __io uint32 systick_timer_millis; +extern volatile uint32 systick_timer_millis; void systick_init(uint32 reload_val); void systick_disable(); |