STM32 PC通过串口助手无线传输数据到单片机
之前学习了STM32单片机,使用正点原子的精英板、两个TTL 转LoRa 半双工无线数传模块,通过PC机串口助手,向32单片机传输数据,接收数据使用串口1。
无线数传模块
模块的无线通讯部分基于Semtech Sx1276或Sx1278 的LoRa扩频调制技术,内部自动扩频计算和前导CRC 纠错处理。具有超高接收灵敏度和超强抗干扰能力,同等发射功率下比其他无线数传方案通讯距离更远,表现出更低的功耗。
无线数传模块采用STM8L低功耗单片机处理器,用户不需要对模块进行二次开发。支持广播透明传输模式和一对多星型协议组网模式。
引脚说明:
连线架构简图
串口调试助手发送数据
开发板LCD显示:
KEIL工程:
串口初始化函数:
void uart_init(u32 bound){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, 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);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_InitStructure.USART_BaudRate = bound;
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_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
串口1中断处理函数:
void USART1_IRQHandler(void)
{
u8 Res;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
Res =USART_ReceiveData(USART1);
if((USART_RX_STA&0x8000)==0)
{
if(USART_RX_STA&0x4000)
{
if(Res!=0x0a)USART_RX_STA=0;
else USART_RX_STA|=0x8000;
}
else
{
if(Res==0x0d)USART_RX_STA|=0x4000;
else
{
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
USART_RX_STA++;
if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;
}
}
}
}
}
主函数:
#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "lcd.h"
#include "usart.h"
int main(void)
{
u16 t;
u16 len;
u8 lcd_id[12];
delay_init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
uart_init(9600);
LED_Init();
LCD_Init();
POINT_COLOR=RED;
sprintf((char*)lcd_id,"LCD ID:%04X",lcddev.id);
LCD_Clear(WHITE);
POINT_COLOR=RED;
LCD_ShowString(30,40,210,24,24,"Elite STM32F1 ^_^");
LCD_ShowString(30,70,200,16,16,"LoRa");
LCD_ShowString(30,90,200,16,16,"ATOM@ALIENTEK");
LCD_ShowString(30,110,200,16,16,lcd_id);
LCD_ShowString(30,130,200,12,12,"2020/08/06");
while(1)
{
if(USART_RX_STA&0x8000)
{
len=USART_RX_STA&0x3fff;
LCD_ShowString(30,150,200,16,16,USART_RX_BUF);
USART_RX_STA=0;
for(t=0;t<len;t++)
{
USART_RX_BUF[t]=' ';
}
}
}
}
很多人想要源码,其实用正点原子的LCD工程,再复制main函数就可以了,下面是云盘链接:
百度网盘链接:https://pan.baidu.com/s/1LtINpks_FGVjFcfQyLi_uQ
提取码:z2gb
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