SystemCoreClock = (((HSE_VALUE / prediv2factor) * pll2mull) / prediv1factor) * pllmull;
}
}
#endif
break;
default:
SystemCoreClock = HSI_VALUE;
break;
}
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
SystemCoreClock >>= tmp;
}
static void SetSysClock(void)
{
#ifdef SYSCLK_FREQ_HSE
SetSysClockToHSE();
#elif defined SYSCLK_FREQ_24MHz
SetSysClockTo24();
#elif defined SYSCLK_FREQ_36MHz
SetSysClockTo36();
#elif defined SYSCLK_FREQ_48MHz
SetSysClockTo48();
#elif defined SYSCLK_FREQ_56MHz
SetSysClockTo56();
#elif defined SYSCLK_FREQ_72MHz
SetSysClockTo72();
#endif
}
#ifdef DATA_IN_ExtSRAM
void SystemInit_ExtMemCtl(void)
{
RCC->AHBENR = 0x00000114;
RCC->APB2ENR = 0x000001E0;
GPIOD->CRL = 0x44BB44BB;
GPIOD->CRH = 0xBBBBBBBB;
GPIOE->CRL = 0xB44444BB;
GPIOE->CRH = 0xBBBBBBBB;
GPIOF->CRL = 0x44BBBBBB;
GPIOF->CRH = 0xBBBB4444;
GPIOG->CRL = 0x44BBBBBB;
GPIOG->CRH = 0x44444B44;
FSMC_Bank1->BTCR[4] = 0x00001011;
FSMC_Bank1->BTCR[5] = 0x00000200;
}
#endif
#ifdef SYSCLK_FREQ_HSE
static void SetSysClockToHSE(void)
{
__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
RCC->CR |= ((uint32_t)RCC_CR_HSEON);
do
{
HSEStatus = RCC->CR & RCC_CR_HSERDY;
StartUpCounter++;
} while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
if ((RCC->CR & RCC_CR_HSERDY) != RESET)
{
HSEStatus = (uint32_t)0x01;
}
else
{
HSEStatus = (uint32_t)0x00;
}
if (HSEStatus == (uint32_t)0x01)
{
#if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL
FLASH->ACR |= FLASH_ACR_PRFTBE;
FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
#ifndef STM32F10X_CL
FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0;
#else
if (HSE_VALUE <= 24000000)
{
FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0;
}
else
{
FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_1;
}
#endif
#endif
RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_div1;
RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_div1;
RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_div1;
RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
RCC->CFGR |= (uint32_t)RCC_CFGR_SW_HSE;
while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x04)
{
}
}
else
{
}
}
#elif defined SYSCLK_FREQ_24MHz
static void SetSysClockTo24(void)
{
__IO uint32_t StartUpCounter = 0, HSEStatus = 0;
RCC->CR |= ((uint32_t)RCC_CR_HSEON);
do
{
HSEStatus = RCC->CR & RCC_CR_HSERDY;
StartUpCounter++;
} while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
if ((RCC->CR & RCC_CR_HSERDY) != RESET)
{
HSEStatus = (uint32_t)0x01;
}
else
{
HSEStatus = (uint32_t)0x00;
}
if (HSEStatus == (uint32_t)0x01)
{
#if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL
FLASH->ACR |= FLASH_ACR_PRFTBE;
FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0;
#endif
RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_div1;
RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_div1;
RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_div1;
#ifdef STM32F10X_CL
RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL);
RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREdiv1 | RCC_CFGR_PLLSRC_PREdiv1 |
RCC_CFGR_PLLMULL6);
RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREdiv2 | RCC_CFGR2_PLL2MUL |
RCC_CFGR2_PREdiv1 | RCC_CFGR2_PREdiv1SRC);
RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREdiv2_div5 | RCC_CFGR2_PLL2MUL8 |
RCC_CFGR2_PREdiv1SRC_PLL2 | RCC_CFGR2_PREdiv1_div10);
RCC->CR |= RCC_CR_PLL2ON;
while((RCC->CR & RCC_CR_PLL2RDY) == 0)
{
}
#elif defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL));
RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_PREdiv1 | RCC_CFGR_PLLXTPRE_PREdiv1_Div2 | RCC_CFGR_PLLMULL6);
#else
RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL));
