STM32F103RCT6mini开发板编程实现串口命令控制灯光开关代码
时间: 2024-03-16 07:41:34 浏览: 13
以下是STM32F103RCT6mini开发板编程实现串口命令控制灯光开关的代码:
```c
#include "stm32f10x.h"
void USART1_Init(void);
void LED_Init(void);
void USART1_SendChar(char ch);
void USART1_SendString(char* str);
void delay_ms(u32 nms);
int main(void)
{
char cmd;
LED_Init();
USART1_Init();
while(1)
{
if(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == SET)
{
cmd = USART_ReceiveData(USART1);
switch(cmd)
{
case '0':
GPIO_ResetBits(GPIOB, GPIO_Pin_0);
USART1_SendString("LED OFF\r\n");
break;
case '1':
GPIO_SetBits(GPIOB, GPIO_Pin_0);
USART1_SendString("LED ON\r\n");
break;
default:
USART1_SendString("Invalid command\r\n");
break;
}
}
}
}
void USART1_Init(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
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(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
void LED_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void USART1_SendChar(char ch)
{
USART_SendData(USART1, (uint16_t)ch);
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
void USART1_SendString(char* str)
{
while(*str)
{
USART1_SendChar(*str++);
}
}
void delay_ms(u32 nms)
{
u32 i, j;
for(i = 0; i < nms; i++)
{
for(j = 0; j < 1000; j++);
}
}
```
在该代码中,我们初始化了串口和LED GPIO引脚,并进入了无限循环。在循环中,我们检测是否有数据接收到,如果有,我们将读取数据并根据数据执行相应的操作。如果接收到的数据是“0”,我们将关闭LED并向串口发送“LED OFF”消息。如果接收到的数据是“1”,我们将打开LED并向串口发送“LED ON”消息。如果接收到的数据不是“0”或“1”,我们将向串口发送“Invalid command”消息。