1 files changed, 0 insertions, 56 deletions
diff --git a/stm/systick.c b/stm/systick.c
deleted file mode 100644
index 40ae532793..0000000000
--- a/stm/systick.c
+++ /dev/null
@@ -1,56 +0,0 @@
-#include <stm32f4xx.h>
-#include "misc.h"
-#include "systick.h"
-
-volatile uint32_t sys_tick_counter;
-
-void sys_tick_init(void) {
-    // sys-tick interrupt called at 1ms intervals
-    sys_tick_counter = 0;
-    SysTick_Config(SystemCoreClock / 1000);
-    NVIC_SetPriority(SysTick_IRQn, 0); // make it highest priority
-}
-
-// called on SysTick interrupt
-void SysTick_Handler(void) {
-    sys_tick_counter++;
-    // hack!
-    //void audio_drain(void);
-    //audio_drain();
-}
-
-void sys_tick_delay_ms(uint32_t delay_ms) {
-    sys_tick_wait_at_least(sys_tick_counter, delay_ms);
-}
-
-// waits until at least delay_ms milliseconds have passed from the sampling of sys_tick_counter in stc
-// handles overflow properl
-// assumes stc was taken from sys_tick_counter some time before calling this function
-// eg stc <= sys_tick_counter for the case of no wrap around of sys_tick_counter
-void sys_tick_wait_at_least(uint32_t stc, uint32_t delay_ms) {
-    // stc_wait is the value of sys_tick_counter that we wait for
-    uint32_t stc_wait = stc + delay_ms;
-    if (stc_wait < stc) {
-        // stc_wait wrapped around
-        while (stc <= sys_tick_counter || sys_tick_counter < stc_wait) {
-            __WFI(); // enter sleep mode, waiting for interrupt
-        }
-    } else {
-        // stc_wait did not wrap around
-        while (stc <= sys_tick_counter && sys_tick_counter < stc_wait) {
-            __WFI(); // enter sleep mode, waiting for interrupt
-        }
-    }
-}
-
-bool sys_tick_has_passed(uint32_t stc, uint32_t delay_ms) {
-    // stc_wait is the value of sys_tick_counter that we wait for
-    uint32_t stc_wait = stc + delay_ms;
-    if (stc_wait < stc) {
-        // stc_wait wrapped around
-        return !(stc <= sys_tick_counter || sys_tick_counter < stc_wait);
-    } else {
-        // stc_wait did not wrap around
-        return !(stc <= sys_tick_counter && sys_tick_counter < stc_wait);
-    }
-}