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各位大佬救命,原子哥的复制上去是可以的,但为什么我照着课程写的不行啊!找了俩小时没找到错误在哪。。。
这是我照着写的:
#include"stm32f10x.h"
void my_usart_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
USART_InitStructure.USART_BaudRate=115200;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_Init(USART1,&USART_InitStructure);
USART_Cmd(USART1,ENABLE);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_Init(&NVIC_InitStructure);
}
void USART1_TRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART1,USART_IT_RXNE))
{
res= USART_ReceiveData(USART1);
USART_SendData(USART1,res);
}
}
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
my_usart_init();
while(1);
}
这是原子哥的:
- #include "stm32f10x.h"
- void my_usart_init(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//①
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
- //②
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//LED0-->PA.9 端口配置
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Speed =GPIO_Speed_10MHz; //IO口速度为10MHz
- GPIO_Init(GPIOA, &GPIO_InitStructure); //根据设定参数初始化GPIOA.9
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//LED0-->PA.10 端口配置
- GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING; //推挽输出
- GPIO_InitStructure.GPIO_Speed =GPIO_Speed_10MHz; //IO口速度为10MHz
- GPIO_Init(GPIOA, &GPIO_InitStructure); //根据设定参数初始化GPIOA.10
- USART_InitStructure.USART_BaudRate=115200;
- USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
- USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
- USART_InitStructure.USART_Parity=USART_Parity_No;
- USART_InitStructure.USART_StopBits=USART_StopBits_1;
- USART_InitStructure.USART_WordLength=USART_WordLength_8b;
- USART_Init(USART1,&USART_InitStructure);//③
- USART_Cmd(USART1,ENABLE);//使能串口一
- USART_ITConfig(USART1,USART_IT_RXNE ,ENABLE);//开启接收中断
- NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
- NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
- NVIC_Init(&NVIC_InitStructure);
- }
- void USART1_IRQHandler(void)
- {
- u8 res;
- if(USART_GetITStatus(USART1,USART_IT_RXNE))
- {
- res= USART_ReceiveData(USART1);
- USART_SendData(USART1,res);
- }
- }
- int main(void)
- {
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
- my_usart_init();
- while(1);
- }
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