void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON); //RCC_HSE_ON--HSE crystal oscillator is turned on (ON)
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS) //SUCCESS: HSE crystal oscillator is stable and ready
{
FLASH_SetLatency(FLASH_Latency_1); //FLASH_Latency_1 1 delay cycle
FLASH_PrefetchBufferCmd(ENABLE); // Prefetch buffer enable
/* PLL configuration: pllclk= HSE * 6 = 48 MHz */
RCC_PREDIV1Config(RCC_PREDIV1_Div1);
RCC_PLLConfig(RCC_PLLSource_PREDIV1, RCC_PLLMul_6);
RCC_HCLKConfig(RCC_SYSCLK_Div1); //RCC_SYSCLK_Div1--AHB clock HCLK = SYSCLK(48) system clock
RCC_PCLKConfig(RCC_HCLK_Div1); //PCLK = HCLK = 48
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //Select PLL as sysclk system clock SYSCLK = PLLCLK
while(RCC_GetSYSCLKSource() != 0x08){} //Wait for system clock to be set successfully 0x08: PLL is used as system clock
}
}
Previous article：GPIO configuration of STM32F051R8T6
Next article：About the __IO modifier in the STM32 library (volatile modifier, meaning capricious)
- Popular Resources
- Popular amplifiers
Introduction to the RTC calibration function of the STM32F microcontroller
- Download from the Internet--ARM Getting Started NotesA brief introduction: From today on, the ARM notebook of the rookie is open, and it can be regarded as a place to store these notes. Why publish it? Maybe you are interested in it. In fact, the reason for these notes is ...
- Learn ARM development(22)Turning off and on interrupts Interrupts are an efficient dialogue mechanism, but sometimes you don't want to interrupt the program while it is running. For example, when you are printing something, the program suddenly interrupts and another ...
- Learn ARM development(21)First, declare the task pointer, because it will be used later. Task pointer volatile TASK_TCB* volatile g_pCurrentTask = NULL;volatile TASK_TCB* vol ...
- Learn ARM development(20)With the previous Tick interrupt, the basic task switching conditions are ready. However, this "easterly" is also difficult to understand. Only through continuous practice can we understand it. ...
- Learn ARM development(19)After many days of hard work, I finally got the interrupt working. But in order to allow RTOS to use timer interrupts, what kind of interrupts can be implemented in S3C44B0? There are two methods in S3C44B0. ...
- Learn ARM development(14)
- Learn ARM development(15)
- Learn ARM development(16)
- Learn ARM development(17)
Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
- Innolux's intelligent steer-by-wire solution makes cars smarter and safer
- 8051 MCU - Parity Check
- How to efficiently balance the sensitivity of tactile sensing interfaces
- What should I do if the servo motor shakes? What causes the servo motor to shake quickly?
- 【Brushless Motor】Analysis of three-phase BLDC motor and sharing of two popular development boards
- Midea Industrial Technology's subsidiaries Clou Electronics and Hekang New Energy jointly appeared at the Munich Battery Energy Storage Exhibition and Solar Energy Exhibition
- Guoxin Sichen | Application of ferroelectric memory PB85RS2MC in power battery management, with a capacity of 2M
- Analysis of common faults of frequency converter
- In a head-on competition with Qualcomm, what kind of cockpit products has Intel come up with?
- Dalian Rongke's all-vanadium liquid flow battery energy storage equipment industrialization project has entered the sprint stage before production
- Allegro MicroSystems Introduces Advanced Magnetic and Inductive Position Sensing Solutions at Electronica 2024
- Car key in the left hand, liveness detection radar in the right hand, UWB is imperative for cars!
- After a decade of rapid development, domestic CIS has entered the market
- Aegis Dagger Battery + Thor EM-i Super Hybrid, Geely New Energy has thrown out two "king bombs"
- A brief discussion on functional safety - fault, error, and failure
- In the smart car 2.0 cycle, these core industry chains are facing major opportunities!
- The United States and Japan are developing new batteries. CATL faces challenges? How should China's new energy battery industry respond?
- Murata launches high-precision 6-axis inertial sensor for automobiles
- Ford patents pre-charge alarm to help save costs and respond to emergencies
- New real-time microcontroller system from Texas Instruments enables smarter processing in automotive and industrial applications
- GigaDevice GD32307E-START development board recommendation
- SIMterix-Simplis~6~
- Experience in using MQTT protocol
- AD13 duplication pad package problem
- SSD1306 Chinese character mobile demonstration
- Using Low Noise Modules in Satellite Applications
- Some misunderstandings in FPGA learning.zip
- MSP430F5438A supports communication scheme verification based on COAP protocol
- I want to design a sine wave generator.
- [RT-Thread reading notes] Part 1 Simple principles of the kernel
京公网安备 11010802033920号