stm32f103c8_寄存器版_temp.zip

void Stm32_Clock_Init(uint8_t SW,uint8_t PLLSRC,uint8_t PLLXTPRE,uint8_t PLLMUL,uint8_t HPRE,uint8_t PPRE1,uint8_t PPRE2,uint8_t Latency) { unsigned char temp=0; RCC_DeInit(); if(SW == 00) { RCC->CR |= 0x00000001; while(!((RCC->CR>>1) & 0x01)); } else if(SW == 01) { RCC->CR |= 0x00010000; while(!((RCC->CR>>17) & 0x01)); RCC->CR |= 0x00080000; } else if(SW == 10) { if(PLLSRC) { RCC->CR |= 0x00010000; while(!((RCC->CR>>17) & 0x01)); RCC->CR |= 0x00080000; RCC->CFGR |= PLLMUL&lt;<18>CFGR |= 1&lt;<16>CR |= PLLXTPRE&lt;<17>CR|=0x01000000; while(!(RCC->CR>>25)); } else { RCC->CR |= 0x00000001; while(!((RCC->CR>>1) & 0x01)); RCC->CFGR |= PLLMUL&lt;<18>CR|=0x01000000; while(!(RCC->CR>>25)); } FLASH->ACR |= 0x30 + Latency; RCC->CFGR |= HPRE&lt;<4>CFGR |= PPRE1&lt;<8>CFGR |= PPRE2&lt;<11>CFGR |= SW; while(temp != SW) { temp = ((RCC->CFGR>>2) & 0x03); } } }