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Hi,

The definition provided above is not crucial, as you can configure it directly in your code.

This configuration is specifically for the STM32F103C8 microcontroller, utilizing an 8 MHz external clock and setting the system frequency to 36 MHz. Please note that this information is based on my previous code, which I have copied here for reference.

void CLOCK(void){
    
    RCC_DeInit();     
    
    RCC_LSICmd(ENABLE);
    while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == SET);
    
    RCC_HSEConfig(RCC_HSE_ON);
    
    while(RCC_WaitForHSEStartUp() != SUCCESS){}
        
            
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);    
    FLASH_SetLatency(FLASH_Latency_2);    
    
        
    RCC_HCLKConfig(RCC_SYSCLK_Div1);    
    RCC_PCLK1Config(RCC_HCLK_Div2);                         
    RCC_PCLK2Config(RCC_HCLK_Div1);                        
        
    
        
    RCC_PLLCmd(DISABLE);
        
    RCC_PLLConfig(RCC_PLLSource_HSE_Div2,RCC_PLLMul_12);
                
    RCC_PLLCmd(ENABLE);
    
    while(RCC_GetFlagStatus( RCC_FLAG_PLLRDY)!=SET);
        
            
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
    
    while (RCC_GetSYSCLKSource() != 0x08){}
        
    FLASH_SetLatency(FLASH_Latency_1);    
    
}

Hi,

The definition provided above is not crucial, as you can configure it directly in your code.

This configuration is specifically for the STM32F103C8 microcontroller, utilizing an 8 MHz external clock and setting the system frequency to 36 MHz. Please note that this information is based on my previous code, which I have copied here for reference.

void CLOCK(void){
    
    RCC_DeInit();     
    
    RCC_LSICmd(ENABLE);
    while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == SET);
    
    RCC_HSEConfig(RCC_HSE_ON);
    
    while(RCC_WaitForHSEStartUp() != SUCCESS){}
        
            
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);    
    FLASH_SetLatency(FLASH_Latency_2);    
    
        
    RCC_HCLKConfig(RCC_SYSCLK_Div1);    
    RCC_PCLK1Config(RCC_HCLK_Div2);                         
    RCC_PCLK2Config(RCC_HCLK_Div1);                        
        
    
        
    RCC_PLLCmd(DISABLE);
        
    RCC_PLLConfig(RCC_PLLSource_HSE_Div2,RCC_PLLMul_12);
                
    RCC_PLLCmd(ENABLE);
    
    while(RCC_GetFlagStatus( RCC_FLAG_PLLRDY)!=SET);
        
            
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
    
    while (RCC_GetSYSCLKSource() != 0x08){}
        
    FLASH_SetLatency(FLASH_Latency_1);    
    
}