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This commit is contained in:
Armel FAUVEAU
2024-08-16 00:11:09 +02:00
parent 7c53df8d2b
commit 74862d1ac2
95 changed files with 15257 additions and 15258 deletions
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30
driver/systick.c
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@@ -23,27 +23,27 @@ static uint32_t gTickMultiplier;
void SYSTICK_Init(void)
{
SysTick_Config(480000);
gTickMultiplier = 48;
SysTick_Config(480000);
gTickMultiplier = 48;
}
void SYSTICK_DelayUs(uint32_t Delay)
{
const uint32_t ticks = Delay * gTickMultiplier;
uint32_t elapsed_ticks = 0;
uint32_t Start = SysTick->LOAD;
uint32_t Previous = SysTick->VAL;
do {
uint32_t Current;
const uint32_t ticks = Delay * gTickMultiplier;
uint32_t elapsed_ticks = 0;
uint32_t Start = SysTick->LOAD;
uint32_t Previous = SysTick->VAL;
do {
uint32_t Current;
do {
Current = SysTick->VAL;
} while (Current == Previous);
do {
Current = SysTick->VAL;
} while (Current == Previous);
uint32_t Delta = ((Current < Previous) ? - Current : Start - Current);
uint32_t Delta = ((Current < Previous) ? - Current : Start - Current);
elapsed_ticks += Delta + Previous;
elapsed_ticks += Delta + Previous;
Previous = Current;
} while (elapsed_ticks < ticks);
Previous = Current;
} while (elapsed_ticks < ticks);
}