相关初始化程序为：
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main(void)
{
int len;
u8 bufs[50];
#ifdef DEBUG
debug();
#endif
/* System Clocks Configuration */
RCC_Configuration();
/* NVIC configuration */
NVIC_Configuration();
/* SysTick end of count event each 1ms with input clock equal to 9MHz (HCLK/8, default) */
TIM_Configuration();
GPIO_Configuration();
if (BKP_ReadBackupRegister(BKP_DR1) != 0x5AA5)
{
/* Backup data register value is not correct or not yet programmed (when
the first time the program is executed) */
//printf("
RTC not yet configured....");
/* RTC Configuration */
if(RTC_LSE_Configuration())
#if 1
{
LedAlarm(HIGH_LEVEL);
while(1);
}
else
{
LedFail(LOW_LEVEL);
LedAlarm(LOW_LEVEL);
LedRun(HIGH_LEVEL);
}
#else
RTC_Configuration();
#endif
/* Adjust time by values entred by the user on the hyperterminal */
Time_Adjust(secondcount);
BKP_WriteBackupRegister(BKP_DR1, 0x5AA5);
}
else
{
/* Check if the Power On Reset flag is set */
if (RCC_GetFlagStatus(RCC_FLAG_PORRST) != RESET)
{
//printf("
Power On Reset occurred....");
}
/* Check if the Pin Reset flag is set */
else if (RCC_GetFlagStatus(RCC_FLAG_PINRST) != RESET)
{
//printf("
External Reset occurred....");
}
//printf("
No need to configure RTC....");
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
LcdInit();
InitKey();
/* Initialize the SPI FLASH driver */
SPI_FLASH_Init();
ADCInit();
SPI_ADC_Init();
DisplayMenuTest();
while (1)
{
len=ReadComm(1, bufs, 8);
if(len)//<100*1024)
{ //int i;
//for(i = 0; i < 0x2000; i++);
WriteComm(1, bufs, len);
//len+=len;
}
}
}
/*******************************************************************************
* 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);
/* 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 --------------------------------------------------*/
/* Enable DMA1 clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable GPIOA and USART1 clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ALL , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2|RCC_APB1Periph_TIM3|RCC_APB1Periph_SPI2|RCC_APB1Periph_TIM2|RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
}
#endif
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures the nested vectored interrupt controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
#ifdef VECT_DFU
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x4000);
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
#endif
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable the RTC Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the DMA1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the TIM2 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/*******************************************************************************
* Function Name : RTC_Configuration
* Description : Configures the RTC.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RTC_Configuration(void)
{
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
/* Enable the LSI OSC */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1sec */
RTC_SetPrescaler(40000);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* To output second signal on Tamper pin, the tamper functionality
must be disabled (by default this functionality is disabled) */
BKP_TamperPinCmd(DISABLE);
/* Enable the RTC Second Output on Tamper Pin */
BKP_RTCOutputConfig(BKP_RTCOutputSource_Second);
}
int RTC_LSE_Configuration(void)
{
u32 tick1,tick2;
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
/* Reset Backup Domain */
BKP_DeInit();
/* Enable LSE */
RCC_LSEConfig(RCC_LSE_ON);
/* Wait till LSE is ready */
tick1 = 0;
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
LedFail(HIGH_LEVEL);
Delayms(3000);
LedFail(LOW_LEVEL);
Delayms(3000);
RCC_LSEConfig(RCC_LSE_ON);
}
if(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
xtal_32k = 1;
//RCC_LSEConfig(RCC_LSE_OFF);
//PrintStr(10, 10, "LSE work abnormal", 16);
//Delayms(2000);
return 1;
}
/* Select LSE as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* Enable RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1sec */
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
return 0;
}
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