[mw_shl_code=c,true]#include"stm32f10x.h"
#define LED2ON GPIO_ResetBits(GPIOE,GPIO_Pin_5)
#define LED3ON GPIO_ResetBits(GPIOB,GPIO_Pin_5)
u16 num;
int RXD,TXD;
static __IO uint32_t TimingDelay;
void Delay(__IO uint32_t nTime);
void Systick_Init()
{
if (SysTick_Config(SystemCoreClock / 1000))
{
while (1);
}
}
void GPIO_INIT()
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);[/mw_shl_code]
[mw_shl_code=c,true] GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;[/mw_shl_code]
[mw_shl_code=c,true] GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOE, &GPIO_InitStructure);
}
void USART_INIT()
{
USART_InitTypeDef USART_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);//USART2?±??APB1
USART_DeInit(USART2);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2,&USART_InitStructure);
USART_Cmd(USART2,ENABLE);
USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
}
void NVIC_INIT()
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
int main()
{
Systick_Init();
GPIO_INIT();
USART_INIT();
NVIC_INIT();
while(1)
{
if(RXD==1)
{
switch(num)
{
case 0  ED2ON;break;
case 1 ED3ON;break;
default:break;
}
RXD=0;
USART_ClearFlag(USART2,USART_FLAG_RXNE);
}
}
}
void Delay(__IO uint32_t nTime)
{
TimingDelay = nTime;
while(TimingDelay != 0);
}
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}
void USART2_IRQHandler(void)
{
if (USART_GetITStatus(USART2, USART_IT_TXE) != RESET) // Transmit the string in a loop
{
USART_ClearFlag(USART2,USART_FLAG_TXE);
TXD=1;
}
if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) // Received characters modify string
{
RXD=1;
num = USART_ReceiveData(USART2);
}
}
[/mw_shl_code]
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发表于 2015-10-21 20:57:07
楼主
发表于 2015-10-21 21:35:39
