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cpu:_stm32_common: #ifdef -> if

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This commit is contained in:
Kaspar Schleiser 2017-08-23 14:23:17 +02:00
parent acfa727151
commit 6d18a51769
1 changed files with 30 additions and 21 deletions
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51
cpu/stm32_common/stmclk_common.c
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@ -47,6 +47,13 @@
#define BIT_LSERDY RCC_BDCR_LSERDY
#endif
#ifndef CLOCK_HSE
#define CLOCK_HSE (0U)
#endif
#ifndef CLOCK_LSE
#define CLOCK_LSE (0U)
#endif
void stmclk_enable_hsi(void)
{
RCC->CR |= RCC_CR_HSION;
@ -57,36 +64,38 @@ void stmclk_disable_hsi(void)
{
/* we only disable the HSI clock if not used as input for the PLL and if
* not used directly as system clock */
#if CLOCK_HSE
if ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI) {
RCC->CR &= ~(RCC_CR_HSION);
if (CLOCK_HSE) {
if ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI) {
RCC->CR &= ~(RCC_CR_HSION);
}
}
#endif
}
void stmclk_enable_lfclk(void)
{
#if CLOCK_LSE
stmclk_dbp_unlock();
RCC->REG_LSE |= BIT_LSEON;
while (!(RCC->REG_LSE & BIT_LSERDY)) {}
stmclk_dbp_lock();
#else
RCC->CSR |= RCC_CSR_LSION;
while (!(RCC->CSR & RCC_CSR_LSIRDY)) {}
#endif
if (CLOCK_LSE) {
stmclk_dbp_unlock();
RCC->REG_LSE |= BIT_LSEON;
while (!(RCC->REG_LSE & BIT_LSERDY)) {}
stmclk_dbp_lock();
}
else {
RCC->CSR |= RCC_CSR_LSION;
while (!(RCC->CSR & RCC_CSR_LSIRDY)) {}
}
}
void stmclk_disable_lfclk(void)
{
#if CLOCK_LSE
stmclk_dbp_unlock();
RCC->REG_LSE &= ~(BIT_LSEON);
while (!(RCC->REG_LSE & BIT_LSERDY)) {}
stmclk_dbp_lock();
#else
RCC->CSR &= ~(RCC_CSR_LSION);
#endif
if (CLOCK_LSE) {
stmclk_dbp_unlock();
RCC->REG_LSE &= ~(BIT_LSEON);
while (!(RCC->REG_LSE & BIT_LSERDY)) {}
stmclk_dbp_lock();
}
else {
RCC->CSR &= ~(RCC_CSR_LSION);
}
}
void stmclk_dbp_unlock(void)