视频地址：http://player.youku.com/player.php/sid/XODM1Mjc2NjQw/v.swf
#include "stm32f10x.h"
#include "stm32_eval.h"
#include
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
long flag;
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
void RCC_Configuration(void)//外设时钟使能
{
SystemInit();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG 管脚映射重映射
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM3, ENABLE);//TIM2 TIM3
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);//TIM8
}
void USART_int(long BaudRate)//USART1初始化
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* PA10 USART1_Rx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = BaudRate;//??????
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//???????8bit
USART_InitStructure.USART_StopBits = USART_StopBits_1;//????1
USART_InitStructure.USART_Parity = USART_Parity_No;//????
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//??????none
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//??????????
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_ClockInit(USART1, &USART_ClockInitStructure);
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);//使能USART1
}
void NVIC_Configuration(void)//中断优先级设置
{
NVIC_InitTypeDef NVIC_InitStructure;//定义结构体变量
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);//设置优先级分组
/* Enable the TIM2 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;//TIM2TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;//从优先级1级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);//初始化NVIC寄存器
/* Enable the TIM3 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;//TIM2TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 8;//从优先级1级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);//初始化NVIC寄存器
/* Enable the TIM8 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;//TIM2TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;//从优先级1级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);//初始化NVIC寄存器
}
void Timer_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//定义结构体变量
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//使能TIM2外设
TIM_DeInit(TIM2);//复位时钟TIM2，恢复初始状态
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 36000;//周期
TIM_TimeBaseStructure.TIM_Prescaler = 1000;//分频系数
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//设置时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//初始化TIM2
TIM_ClearFlag(TIM2,TIM_FLAG_Update);//清楚标志
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE ); //使能TIM2的更新中断
/* TIM2 enable counter */
TIM_Cmd(TIM2, ENABLE);//使能TIM2外设
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);//使能TIM3外设
TIM_DeInit(TIM3);//复位时钟TIM3，恢复初始状态
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 56000;//周期
TIM_TimeBaseStructure.TIM_Prescaler = 1000;//分频系数
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//设置时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//初始化TIM3
TIM_ClearFlag(TIM3,TIM_FLAG_Update);//清楚标志
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能TIM3的更新中断
/* TIM2 enable counter */
TIM_Cmd(TIM3, ENABLE);//使能TIM3外设
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);//使能TIM8外设
TIM_DeInit(TIM8);//复位时钟TIM8，恢复初始状态
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 50000;//周期
TIM_TimeBaseStructure.TIM_Prescaler = 1100;//分频系数
TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ;//设置时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式
TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure);//初始化TIM2
TIM_ClearFlag(TIM8,TIM_FLAG_Update);//清楚标志
TIM_ITConfig(TIM8,TIM_IT_Update,ENABLE ); //使能TIM8的更新中断
/* TIM2 enable counter */
TIM_Cmd(TIM8, ENABLE);//使能TIM2外设
}
void TIM2_IRQHandler(void) //TIM2中断
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //检查TIM2更新中断发生与否
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update ); //清除TIM2更新中断标志
GPIO_SetBits(GPIOC,GPIO_Pin_1);
}
}
void TIM3_IRQHandler(void) //TIM2中断
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查TIM2更新中断发生与否
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIM2更新中断标志
GPIO_SetBits(GPIOC,GPIO_Pin_2);
}
}
void TIM8_IRQHandler(void) //TIM2中断
{
if (TIM_GetITStatus(TIM8, TIM_IT_Update) != RESET) //检查TIM2更新中断发生与否
{
TIM_ClearITPendingBit(TIM8, TIM_IT_Update ); //清除TIM2更新中断标志
GPIO_SetBits(GPIOC,GPIO_Pin_3);
}
}
int main(void)
{
RCC_Configuration();
USART_int(115200);
NVIC_Configuration();
printf(" config done...\r\n");
Timer_Config();
TIM2_IRQHandler();
TIM3_IRQHandler();
TIM8_IRQHandler();
while (1){
GPIO_ResetBits(GPIOC,GPIO_Pin_1);
delay_ms(200);
GPIO_ResetBits(GPIOC,GPIO_Pin_2);
delay_ms(400);
GPIO_ResetBits(GPIOC,GPIO_Pin_3);
delay_ms(200);
}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
/**
* @brief Retargets the C library printf function to the USART.
* @param None
* @retval None
*/
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(EVAL_COM1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
{}
return ch;
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
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