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使用位锁替换mutex和semaphore实现,仅支持单核

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NeoZng
2023-07-19 13:58:42 +08:00
parent 3faa9f1f8f
commit e938075e11
3 changed files with 32 additions and 13 deletions
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23
bsp/dwt/bsp_dwt.c
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@@ -16,7 +16,6 @@ static uint32_t CPU_FREQ_Hz, CPU_FREQ_Hz_ms, CPU_FREQ_Hz_us;
static uint32_t CYCCNT_RountCount;
static uint32_t CYCCNT_LAST;
static uint64_t CYCCNT64;
static osMutexId DWT_MUTEX;
/**
* @brief 私有函数,用于检查DWT CYCCNT寄存器是否溢出,并更新CYCCNT_RountCount
@@ -28,16 +27,17 @@ static osMutexId DWT_MUTEX;
*/
static void DWT_CNT_Update(void)
{
if (__get_CONTROL()) // 不在中断中,使用互斥锁;在中断则直接执行即可,本框架将所有中断优先级设置为相同,故不会被其他中断重入
if (osOK != osMutexWait(DWT_MUTEX, 0))
return;
static volatile uint8_t bit_locker = 0;
if (!bit_locker)
{
bit_locker = 1;
volatile uint32_t cnt_now = DWT->CYCCNT;
if (cnt_now < CYCCNT_LAST)
CYCCNT_RountCount++;
volatile uint32_t cnt_now = DWT->CYCCNT;
if (cnt_now < CYCCNT_LAST)
CYCCNT_RountCount++;
CYCCNT_LAST = DWT->CYCCNT;
osMutexRelease(DWT_MUTEX);
CYCCNT_LAST = DWT->CYCCNT;
bit_locker = 0;
}
}
void DWT_Init(uint32_t CPU_Freq_mHz)
@@ -55,8 +55,7 @@ void DWT_Init(uint32_t CPU_Freq_mHz)
CPU_FREQ_Hz_ms = CPU_FREQ_Hz / 1000;
CPU_FREQ_Hz_us = CPU_FREQ_Hz / 1000000;
CYCCNT_RountCount = 0;
osMutexDef(dwt_mutex);
DWT_MUTEX = osMutexCreate(osMutex(dwt_mutex));
DWT_CNT_Update();
}