/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
/* Enable GPIO_LED clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO_LED, ENABLE);
}
void RCC_init()
{
// Drop all previous settings of rcc
RCC_DeInit();
RCC_PLLCmd(DISABLE);
RCC_PLLConfig(RCC_PLLSource_HSI, 25, 300, 2, 7);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div4);
RCC_PCLK1Config(RCC_HCLK_Div4);
}
// Configure System Clock
void SYSCLK_Configuration(void)
{
// Stop RCC
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON); // turn HSE on
// detect status of HSE
ErrorStatus HSEStartUpStatus;
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if (HSEStartUpStatus = SUCCESS)
{
/* Flash 2 wait state */
FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_2;
// Disable the PLL
RCC_PLLCmd(DISABLE);
// Divide HCLK by 2
RCC_HCLKConfig(RCC_SYSCLK_Div2);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div1);
// DIV2
//RCC->CFGR |= RCC_CFGR_PLLXTPRE;
// 0111: PLL input clock x 9
RCC_PLLConfig(RCC_PLLSource_HSE_Div2, RCC_PLLMul_9);
// Enable the PLL
RCC_PLLCmd(ENABLE);
// Poll until the PLL is ready
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
// Select PLLCLK as SYSCLK source
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
// Poll until PLLCLK is slected as SYSCLK
while(RCC_GetSYSCLKSource() != 0x08);
}
else
for(;;);
}
/*****************************************************************************
* Function Name : RCC_Configuration
* Description : Reset and Clock Control configuration
* Input : None
* Output : None
* Return : None
******************************************************************************/
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
/* Reset the RCC clock configuration to default reset state */
RCC_DeInit();
/* Configure the High Speed External oscillator */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait for HSE start-up */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Set the code latency value: FLASH Two Latency cycles */
FLASH_SetLatency(FLASH_Latency_2);
/* Configure the AHB clock(HCLK): HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* Configure the High Speed APB2 clcok(PCLK2): PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* Configure the Low Speed APB1 clock(PCLK1): PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* Configure the PLL clock source and multiplication factor */
/* PLLCLK = HSE*PLLMul = 8*9 = 72MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Check whether the specified RCC flag is set or not */
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Get System Clock Source */
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08);
}
}
void RCC_Internal_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
//将外设 RCC寄存器重设为缺省值
RCC_DeInit();
RCC_HSICmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
if(HSEStartUpStatus == SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
//设置 PLL 时钟源及倍频系数
RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_2);
//使能或者失能 PLL,这个参数可以取：ENABLE或者DISABLE
RCC_PLLCmd(ENABLE);//如果PLL被用于系统时钟,那么它不能被失能
//等待指定的 RCC 标志位设置成功 等待PLL初始化成功
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
//设置系统时钟（SYSCLK） 设置PLL为系统时钟源
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
//等待PLL成功用作于系统时钟的时钟源
// 0x00：HSI 作为系统时钟
// 0x04：HSE作为系统时钟
// 0x08：PLL作为系统时钟
while(RCC_GetSYSCLKSource() != 0x08);
}
}
void fastMode() {
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
if (RCC_WaitForHSEStartUp() == ERROR) {
return;
}
RCC_PLLConfig(RCC_PLLSource_HSE, 8, 336, 2, 15);
RCC_PLLCmd(ENABLE);
RCC_WaitForPLLSturtUp();
RCC_HCLKConfig(RCC_SYSCLK_Div4);
RCC_PCLK1Config(RCC_HCLK_Div1);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
}
void Sys_Clock_Init(void)
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit(); // /* RCC system reset(for debug purpose) 重置了RCC的设置*/
RCC_HSEConfig(RCC_HSE_ON); /* Enable HSE */ /* 使能外部高速晶振 */
HSEStartUpStatus = RCC_WaitForHSEStartUp(); /* Wait till HSE is ready 等待高速晶振稳定*/
if(HSEStartUpStatus == SUCCESS)
{
// FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); /* Enable Prefetch Buffer 使能flash预读取缓冲区*/
// FLASH_SetLatency(FLASH_Latency_2); /* Flash 2 wait state
// 令Flash处于等待状态，2是针对高频时钟的，这两句跟RCC没直接关系，可以暂且略过*/
RCC_HCLKConfig(RCC_SYSCLK_Div1); /* HCLK = SYSCLK 设置高速总线时钟=系统时钟*/
RCC_PCLK2Config(RCC_HCLK_Div1); /* PCLK2 = HCLK 设置低速总线2时钟=高速总线时钟*/
RCC_PCLK1Config(RCC_HCLK_Div2); /* PCLK1 = HCLK/2 设置低速总线1的时钟=高速时钟的二分频*/
RCC_ADCCLKConfig(RCC_PCLK2_Div6); /* ADCCLK = PCLK2/6 设置ADC外设时钟=低速总线2时钟的六分频*/
/* RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); // PLLCLK = 8MHz * 9 = 72 MHz 利用锁相环讲外部8Mhz晶振9倍频到72Mhz
RCC_PLLCmd(ENABLE); // Enable PLL 使能锁相环
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) // Wait till PLL is ready 等待锁相环输出稳定
{
} */
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSE);
//RCC_SYSCLKSource_HSI: 高速内部时钟信号 stm32单片机内带的时钟 (8M频率)
//RCC_SYSCLKSource_HSE:(1)HSE外部晶体/陶瓷谐振器(晶振) (2)HSE用户外部时钟
//RCC_SYSCLKSource_PLLCLK:Select PLL as system clock source 将锁相环输出设置为系统时钟*/
while(RCC_GetSYSCLKSource() != 0x04) //HSE used as system clock
// while(RCC_GetSYSCLKSource() != 0x08) /* Wait till PLL is used as system clock source 等待PLL校验成功*/
{
}
}
/* 这个配置可使外部晶振停振的时候,产生一个NMI中断,不需要用的可屏蔽掉*/
//RCC_ClockSecuritySystemCmd(ENABLE);
/* Enable FSMC, GPIOD, GPIOE, GPIOF, GPIOG and AFIO clocks */
//使能外围接口总线时钟，注意各外设的隶属情况，不同芯片的分配不同，查手册就可
/* Enable peripheral clocks -------------------------------*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
// RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
// RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG |
// RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); // AFIO时钟，用来禁止JTAG
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); // 串口1时钟，
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); //ADC1时钟
// RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);//使能DMA1时钟
}
/***************************************************************************//**
* @brief Selects HSE as System clock source and configure HCLK, PCLK2 and PCLK1 prescalers.
******************************************************************************/
void SetSysClockToHSE(void)
{
/* SYSCLK, HCLK, PCLK2 and PCLK1 configuration -----------------------------*/
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig( RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if (HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 0 wait state */
FLASH_SetLatency( FLASH_Latency_0);
/* HCLK = SYSCLK */
RCC_HCLKConfig( RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config( RCC_HCLK_Div1);
/* PCLK1 = HCLK */
RCC_PCLK1Config(RCC_HCLK_Div1);
/* Select HSE as system clock source */
RCC_SYSCLKConfig( RCC_SYSCLKSource_HSE);
/* Wait till PLL is used as system clock source */
while (RCC_GetSYSCLKSource() != 0x04)
{
}
}
else
{ /* If HSE fails to start-up, the application will have wrong clock configuration.
User can add here some code to deal with this error */
/* Go to infinite loop */
while (1)
{
}
}
}
/**************************************************************/
//程 序 名： RCC_Config()
//开 发 者： Haichao.Xie
//入口参数： 无
//功能说明： 系统时钟配置
//**************************************************************/
void RCC_Config(void)
{
ErrorStatus HSEStartUpStatus; //定义结构体
/* RCC system reset(for debug purpose)将外设 RCC寄存器重设为缺省值 */
RCC_DeInit();
/* Enable HSE 设置外部高速晶振（HSE）*/
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready 等待 HSE 起振*/
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if (HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer 预取指缓存使能*/
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state 设置代码延时值*/
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK 设置 AHB 时钟（HCLK）*/
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK 设置高速 AHB 时钟（PCLK2）*/
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/1 设置低速 AHB 时钟（PCLK1）*/
RCC_PCLK1Config(RCC_HCLK_Div1);
/* PLLCLK = 12MHz * 6 = 72 MHz 设置 PLL 时钟源及倍频系数*/
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_6);
/* Enable PLL 使能或者失能 PLL*/
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready 等待指定的 RCC 标志位设置成功 等待PLL初始化成功*/
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source 设置系统时钟（SYSCLK） 设置PLL为系统时钟源*/
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source 等待PLL成功用作于系统时钟的时钟源*/
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
}
void RCC_Config(void)
{
RCC_DeInit(); //RCC寄存器初始化
RCC_HSEConfig(RCC_HSE_ON); //使用外部時鐘
//if(RCC_WaitForHSEStarUp()==SUCCESS)
//{
RCC_PLLCmd(DISABLE);//PLL前應先關閉主PLL
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//選擇PLL時鐘為系統時鐘
RCC_HCLKConfig(RCC_SYSCLK_Div1);//HCLK(AHB)時鐘為系統時鐘1分頻
RCC_PCLK1Config(RCC_HCLK_Div4);//PCLK1(AHB1)時鐘為HCLK時鐘8分頻，則TIM2時鐘為HCLK時鐘4分頻
RCC_PCLK2Config(RCC_HCLK_Div2);//PCLK1(AHB1)時鐘為HCLK時鐘2分頻
RCC_PLLConfig(RCC_PLLSource_HSE,27,162,2,7);//PLL時鐘配置，公式見system_stm43f4xx.c'line149
RCC_PLLCmd(ENABLE); //PLL時鐘開啟
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET){}//等待PLL時鐘準備好
//}
}
void cpu_init(void) {
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
ErrorStatus HSEStartUpStatus = RCC_WaitForHSEStartUp();
if (HSEStartUpStatus == SUCCESS) {
// Enable flash buffers and prefetching
FLASH_PrefetchBufferCmd(ENABLE);
FLASH_InstructionCacheCmd(ENABLE);
FLASH_DataCacheCmd(ENABLE);
// Set startup speed
cpu_reclock(&sysclock_120m);
}
}
static void RCC_Configuration(void)
{
/*---------------------------------*/
/* /!\ PLL2 not configured /!\ */
/*---------------------------------*/
ErrorStatus HSEStartUpStatus;
// RCC system reset(for debug purpose)
RCC_DeInit();
// Enable HSE
RCC_HSEConfig(RCC_HSE_ON);
// Wait till HSE is ready
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
// Enable Prefetch Buffer
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
// Flash 2 wait state
FLASH_SetLatency(FLASH_Latency_2);
// HCLK = SYSCLK
RCC_HCLKConfig(RCC_SYSCLK_Div1);
// PCLK2 = HCLK
RCC_PCLK2Config(RCC_HCLK_Div1);
// PCLK1 = HCLK/2
RCC_PCLK1Config(RCC_HCLK_Div2);
/* ADCCLK = PCLK2/4 */
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
// PLLCLK = 8MHz * 9 = 72 MHz
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
// Enable PLL
RCC_PLLCmd(ENABLE);
// Wait till PLL is ready
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{;}
// Select PLL as system clock source
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
// Wait till PLL is used as system clock source
while(RCC_GetSYSCLKSource() != 0x08) ///????
{;}
}
/* Enable peripheral clocks (FOR USART1)---------------------------------*/
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
/* Enable GPIOA / GPIOC clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(ENABLE);
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() !=0x08);
// the following is the selected part of the clock inicialization, according to your connecting devices
//SPI1 clock open
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
//USART-XTend (wireless data transmittion) clock open
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
//USART-GPS clock open
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
//USART-sensor clock open
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
//GPIO LED clock open
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
//GPIO Launching clock open
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
SysTick_ITConfig(ENABLE);
}
}
/*
* RCC时钟频率引脚配置
*/
void RCC_Configuration(void)
{
//定义错误状态变量
ErrorStatus HSEStartUpStatus;
//将RCC寄存器重新设置为默认值
RCC_DeInit();
//打开外部高速时钟晶振
RCC_HSEConfig(RCC_HSE_ON);
//等待外部高速时钟晶振工作
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus != SUCCESS) return;
//使能预取指缓存
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
//设置FLASH代码延时
FLASH_SetLatency(FLASH_Latency_2);
//设置AHB时钟(HCLK)为系统时钟
RCC_HCLKConfig(RCC_SYSCLK_Div1);
//设置高速AHB时钟(APB2)为HCLK时钟
RCC_PCLK2Config(RCC_HCLK_Div1);
//设置低速AHB时钟(APB1)为HCLK的2分频
RCC_PCLK1Config(RCC_HCLK_Div2);
//设置PLL时钟，为HSE的12倍频 PLLCLK = 12MHz/2 * 12 = 72 MHz
RCC_PLLConfig(RCC_PLLSource_HSE_Div2, RCC_PLLMul_12);
//使能PLL
RCC_PLLCmd(ENABLE);
//等待PLL准备就绪
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
//设置PLL为系统时钟源
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
//判断PLL是否是系统时钟
while(RCC_GetSYSCLKSource() != 0x08);
}
void RCC_HSE_Configuration(void){
RCC_DeInit(); /*将外设RCC寄存器重设为缺省值 */
RCC_HSEConfig(RCC_HSE_ON); /*设置外部高速晶振打开*/
if(RCC_WaitForHSEStartUp() == SUCCESS) { /*等待HSE起振，晶振稳定且就绪*/
RCC_HCLKConfig(RCC_SYSCLK_Div1);/*设置AHB时钟*/
RCC_PCLK2Config(RCC_HCLK_Div1); /*设置高速AHB时钟*/
RCC_PCLK1Config(RCC_HCLK_Div2); /*设置低速AHB时钟*/
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);/*设置PLL时钟源、倍频系数*/
RCC_PLLCmd(ENABLE);//使能PLL
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);//检查指定RCC标志位
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //设置系统时钟
while(RCC_GetSYSCLKSource() != 0x08); //PLL作为系统时钟
}
}
void TSVN_FOSC_Init(void)
{
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
while(RCC_WaitForHSEStartUp() != SUCCESS);
RCC_PREDIV1Config(RCC_PREDIV1_Source_HSE, RCC_PREDIV1_Div1);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div2);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_PLLConfig(RCC_PLLSource_PREDIV1, RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08)
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
SystemCoreClockUpdate();
SysTick_Config(SystemCoreClock/1000);
}
void RCC_Configuration(void)
{
/* 定义枚举型变量HSEStartUpStatus */
ErrorStatus HSEStartUpStatus;
/* 复位系统时钟设置*/
RCC_DeInit();
/* 开启HSE*/
RCC_HSEConfig(RCC_HSE_ON);
/* 等待HSE启振并稳定*/
HSEStartUpStatus = RCC_WaitForHSEStartUp();
/*判断HSE是否起振成功, */
if(HSEStartUpStatus == SUCCESS)
{
/* 选择HCLK(AHB)时钟源为 SYSCLK 1分频 */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* 选择PCLK2时钟源为HCLK(AHB) 1分频*/
RCC_PCLK2Config(RCC_HCLK_Div1);
/* 选择PCLK1时钟源为HCLK(AHB) 2分频*/
RCC_PCLK1Config(RCC_HCLK_Div2);
/* 设置FLASH延时周期数为2 */
FLASH_SetLatency(FLASH_Latency_2);
/* 使能FLASH预缓存 */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* 选择锁相环(PLL)时钟源为HSE 1分频,倍频数为9,则PLL输出频率 8MHz * 9 = 72MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* 使能PLL */
RCC_PLLCmd(ENABLE);
/* 等待PLL输出稳定 */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
/* 选择SYSCLK时钟源为PLL */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* 等待PLL成为SYSCLK时钟源*/
while(RCC_GetSYSCLKSource() != 0x08);
}
/* 打开APB2总线上的GPIOA时钟*/
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOB|
RCC_APB2Periph_AFIO |RCC_APB2Periph_USART1 ,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2 | RCC_APB1Periph_TIM4,ENABLE);
}
//===============================================
void RCC_Configuration(void)
{
FLASH_PrefetchBufferCmd(ENABLE);
FLASH_SetLatency(FLASH_ACR_LATENCY_1);
RCC_DeInit();
RCC_HSICmd(ENABLE);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_6);
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) {}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while (RCC_GetSYSCLKSource() != 0x08) {};
};
void RCC_HSE_Configuration(void) //HSE作为PLL时钟，PLL作为SYSCLK
{
RCC_DeInit(); /*将外设RCC寄存器重设为缺省值 */
RCC_HSEConfig(RCC_HSE_ON); /*设置外部高速晶振（HSE） HSE晶振打开(ON)*/
if(RCC_WaitForHSEStartUp() == SUCCESS) { /*等待HSE起振, SUCCESS：HSE晶振稳定且就绪*/
RCC_HCLKConfig(RCC_SYSCLK_Div1);/*设置AHB时钟(HCLK)RCC_SYSCLK_Div1——AHB时钟 = 系统时*/
RCC_PCLK2Config(RCC_HCLK_Div1); /*设置高速AHB时钟(PCLK2)RCC_HCLK_Div1——APB2时钟 = HCLK*/
RCC_PCLK1Config(RCC_HCLK_Div2); /*设置低速AHB时钟(PCLK1)RCC_HCLK_Div2——APB1时钟 = HCLK / 2*/
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);/*设置PLL时钟源及倍频系数*/
RCC_PLLCmd(ENABLE); /*使能PLL */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) ; /*检查指定的RCC标志位(PLL准备好标志)设置与否*/
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); /*设置系统时钟（SYSCLK） */
while(RCC_GetSYSCLKSource() != 0x08); /*0x08：PLL作为系统时钟 */
}
}
void RCC_Configuration(void)
{
RCC_DeInit(); //将外设RCC寄存器重设为缺省值
#ifdef ExtOSC
RCC_HSEConfig(RCC_HSE_ON); //开启外部高速晶振（HSE）
//等待HSE起振
if( RCC_WaitForHSEStartUp() == SUCCESS) //若成功起振，（下面为系统总线时钟设置）
{
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //使能FLASH预取指缓存
//FLASH_SetLatency(FLASH_Latency_0); //设置FLASH存储器延时时钟周期数(根据不同的系统时钟选取不同的值)
//RCC_HCLKConfig(RCC_SYSCLK_Div1); //设置AHB时钟=72 MHz
//RCC_PCLK2Config(RCC_HCLK_Div2); //设置APB1时钟=36 MHz(APB1时钟最大值)
//RCC_PCLK1Config(RCC_HCLK_Div1); //设置APB2时钟=72 MHz
//4*8=32Mhz
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_4); //PLL必须在其激活前完成配置（设置PLL时钟源及倍频系数）
RCC_PLLCmd(ENABLE);
// while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
// while(RCC_GetSYSCLKSource() != 0x08);
}
//DebugPrint("Use ExtOSC PLL \r\n",);
#else
/* 使用内部RC晶振 */
RCC_HSICmd(ENABLE);//使能内部高速晶振 ;
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);//选择内部高速时钟作为系统时钟SYSCLOCK=8MHZ
RCC_HCLKConfig(RCC_SYSCLK_Div1);//选择HCLK时钟源为系统时钟SYYSCLOCK
//DebugPrint("Use IntOSC\r\n");
#endif
SystemCoreClockUpdate(); //更新时钟必须调用
}
/**
* @brief Selects MSI (64KHz) as System clock source and configure
* HCLK, PCLK2 and PCLK1 prescalers.
* @param None
* @retval None
*/
void SetHCLKToMSI_64KHz(void)
{
/* RCC system reset */
RCC_DeInit();
/* Flash 0 wait state */
FLASH_SetLatency(FLASH_Latency_0);
/* Disable Prefetch Buffer */
FLASH_PrefetchBufferCmd(DISABLE);
/* Disable 64-bit access */
FLASH_ReadAccess64Cmd(DISABLE);
/* Enable the PWR APB1 Clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Select the Voltage Range 3 (1.2V) */
PWR_VoltageScalingConfig(PWR_VoltageScaling_Range3);
/* Wait Until the Voltage Regulator is ready */
while (PWR_GetFlagStatus(PWR_FLAG_VOS) != RESET)
{}
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK */
RCC_PCLK1Config(RCC_HCLK_Div1);
/* Set MSI clock range to 64KHz */
RCC_MSIRangeConfig(RCC_MSIRange_0);
/* Select MSI as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_MSI);
/* Wait till PLL is used as system clock source */
while (RCC_GetSYSCLKSource() != 0x00)
{}
}
void RCC_Config_30MHz(void){
RCC_DeInit();
FLASH_SetLatency(FLASH_Latency_2);
/*configurar clock externo a 72Mhz */
//bypass pois está ligado no OSC_IN um circuito oscilatorio externo
RCC_HSEConfig(RCC_HSE_Bypass);
//Após a ativação do HSE deveremos esperar até que o sinal de relógio esteja pronto e estável
ErrorStatus HSEStartUpStatus;
HSEStartUpStatus=RCC_WaitForHSEStartUp();
if(HSEStartUpStatus==SUCCESS) /*retorna SUCCESS ou ERROR*/
{
//divisão do prescaler AHB por 1
RCC_HCLKConfig(RCC_SYSCLK_Div1);
//divisão do prescaler APB1 por 2
RCC_PCLK1Config(RCC_HCLK_Div1);
//divisão do prescaler APB2 por 1
RCC_PCLK2Config(RCC_HCLK_Div1);
//configuar a PLL para 30Mhz
RCC_PLLConfig(RCC_PLLSource_HSE_Div2,RCC_PLLMul_5);
//activar a pll
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus( RCC_FLAG_PLLRDY)==RESET);
//activa o sysclk pll
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
//confirmar que o clock está correcto logo esperar que a fonte de relógio esteja correta
while(RCC_GetSYSCLKSource()!=0x08);
//clock configurado com sucesso
}
else
while(1); /*se deu erro o micro nao arranca*/
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_PLLConfig(RCC_PLLSource_HSE, 8, 168, 2, 6);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
}
}
void CLOCK_FLASH_config()
{
// クロックの状態を初期値に戻す
RCC_DeInit();
// wait stateの設定
if (VoltageRange_x == VoltageRange_2) FLASH_SetLatency(FLASH_Latency_6);
else if(VoltageRange_x == VoltageRange_3) FLASH_SetLatency(FLASH_Latency_5);
else while(1);
// ART Acceleratorの設定
FLASH_PrefetchBufferCmd(ENABLE);
FLASH_InstructionCacheCmd(ENABLE);
FLASH_DataCacheCmd(ENABLE);
// HSIのキャリブレーション値を設定する
RCC_AdjustHSICalibrationValue(HSICalibrationValue);
// PLLの設定をする (max. 168 MHz)
// PLLM: division factor, 2-63 --> 1-2 MHz (2MHz is recommended)
// PLLN: multiplication factor, 64-432 --> 64-432 MHz
// PLLP: division factor, 2, 4, 6, or 8 --> max 168 MHz
// PLLQ: division factor, 2-15 --> 48 MHz
RCC_PLLConfig(RCC_PLLSource_HSI, 8, 168, 2, 7); // HSI / 8 * 168 / 2 = 168 MHz
//RCC_PLLConfig(RCC_PLLSource_HSI, 8, 168, 4, 7); // HSI / 8 * 168 / 4 = 84 MHz
RCC_PLLCmd(ENABLE);
while( RCC_GetFlagStatus(RCC_FLAG_PLLRDY) != SET);
// HCLKの分周比を設定する (max. 168 MHz)
RCC_HCLKConfig(RCC_SYSCLK_Div1);
// PCLK2の分周比を設定する (max. 84 MHz)
RCC_PCLK2Config(RCC_HCLK_Div2);
// PLCK1の分周比を設定する (max. 42 MHz)
RCC_PCLK1Config(RCC_HCLK_Div4);
// SYSCLKのクロックソースをPLLに切り替える
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
}
void RCC_Configuration(void)
{
/* system clocks configuration -----------------系统时钟配置-------------------*/
/* RCC system reset(for debug purpose) */
RCC_DeInit(); //将外设RCC寄存器重设为缺省值
/* Enable HSE */
//RCC_HSEConfig(RCC_HSE_ON); //开启外部高速晶振（HSE）
/* Wait till HSE is ready */
//HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE起振
//if(HSEStartUpStatus == SUCCESS) //若成功起振，（下面为系统总线时钟设置）
//{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //使能FLASH预取指缓存
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2); //设置FLASH存储器延时时钟周期数(根据不同的系统时钟选取不同的值)
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1); //设置AHB时钟=72 MHz
/* PCLK2 = HCLK/2 */
RCC_PCLK2Config(RCC_HCLK_Div2); //设置APB1时钟=36 MHz(APB1时钟最大值)
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div8); //设置APB2时钟=72 MHz
/* Configure ADCCLK such as ADCCLK = PCLK2/2 */
RCC_ADCCLKConfig(RCC_PCLK2_Div2); //RCC_PCLK2_Div2,4,6,8
/* PLLCLK = 8MHz * 9 = 72 MHz */
//RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_12); //PLL必须在其激活前完成配置（设置PLL时钟源及倍频系数）
RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_12);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
//}
}
//配置系统时钟
void RCC_Configuration(void){
//定义枚举类型变量
ErrorStatus HSEStartUpStatus;
//复位系统时钟设置
RCC_DeInit();
//开启HSE时钟
RCC_HSEConfig(RCC_HSE_ON);
//等待HSE起振并稳定
HSEStartUpStatus=RCC_WaitForHSEStartUp();
//判断HSE是否起振成功
if(HSEStartUpStatus == SUCCESS){
//选择HCLK(AHB)时钟源为SYSCLK 1分频
RCC_HCLKConfig(RCC_SYSCLK_Div1);
//选择PCLK2时钟源为HCLK(AHB) 1分频
RCC_PCLK2Config(RCC_HCLK_Div1);
//选择PCLK1时钟源为HCLK(AHB) 2分频
RCC_PCLK1Config(RCC_HCLK_Div2);
//设置flash延时周期数为2
FLASH_SetLatency(FLASH_Latency_2);
//使能预取缓冲
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
//选择锁相环（PLL时钟源为HSE 1分频，倍频数为9，则PLL输出频率为8M * 9 = 72M）
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
//使能PLL
RCC_PLLCmd(ENABLE);
//等待PLL输出稳定
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){};
//选择PLL为系统时钟源，并等待PLL准备好
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08){};
}
//4个LED对应PE2 PE3 PE4 PE5
//因此要使能APB2总线上的GPIOE时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);
}
//设置系统时钟为72MHz
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON); //使能外部高速时钟
while(RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET) ; //等待外部的高速时钟就绪
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //使能指令预存取
FLASH_SetLatency(FLASH_Latency_2);
RCC_HCLKConfig(RCC_SYSCLK_Div1); //设置AHB时钟为系统时钟
RCC_PCLK2Config(RCC_HCLK_Div1); //设置APB2的时钟为AHB时钟
RCC_PCLK1Config(RCC_HCLK_Div1); //设置APB1的时钟为AHB时钟
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9); //设置PLL时钟为外部告诉时钟的9倍频
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //配置PLL时钟为系统时钟
while(RCC_GetSYSCLKSource()!=0x08);
}
static void
initialize(void)
{
RCC_DeInit();
/* Enable clock for relevant peripherals */
RCC->AHBENR |= RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN | RCC_AHBENR_GPIOFEN;
RCC->APB2ENR |= RCC_APB2ENR_ADCEN;
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannel = ADC1_IRQn;
NVIC_Init(&NVIC_InitStructure);
}
void main(void)
{
GPIO_InitTypeDef gpio;
/* Reset rcc */
RCC_DeInit ();
/* Enable GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/* Initialize GPIO struct */
GPIO_StructInit(&gpio);
/* Use Pin 5 (LD2) */
gpio.GPIO_Pin = GPIO_Pin_5;
/* Set GPIO Speed */
gpio.GPIO_Mode = GPIO_Mode_Out_PP;
/* Set GPIO as output with push-pull */
gpio.GPIO_Speed = GPIO_Speed_50MHz;
/* Apply configuration */
GPIO_Init(GPIOA, &gpio);
while(1)
{
/* Switch led on */
GPIO_SetBits(GPIOA, GPIO_Pin_5);
/* Wait */
delay(100000);
/* Switch led off */
GPIO_ResetBits(GPIOA, GPIO_Pin_5);
/* Wait */
delay(100000);
}
}
void RCC_Configuration(void)
{
// RCC system reset(for debug purpose)
RCC_DeInit();
// Enable Prefetch Buffer
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
// 2 wait states
FLASH_SetLatency(FLASH_Latency_2);
// HCLK = SYSCLK
RCC_HCLKConfig(RCC_SYSCLK_Div1);
// PCLK2 = HCLK/2
RCC_PCLK2Config(RCC_HCLK_Div2);
// PCLK1 = HCLK/4
RCC_PCLK1Config(RCC_HCLK_Div4);
// PLLCLK = 8MHz/2 * 16 = 64 MHz
RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_16);
// Enable PLL
RCC_PLLCmd(ENABLE);
// Wait till PLL is ready
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{}
// Select PLL as system clock source
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
// Wait till PLL is used as system clock source
while(RCC_GetSYSCLKSource() != 0x08)
{}
//enable AFIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
}
