STM32标准库连接阿里云物联网平台(新)

STM32标准库连接阿里云物联网平台(新)

本文使用的相关文件下载：STM32标准库连接阿里云物联网平台(新).zip资源-CSDN文库

1、阿里云物联网平台创建物模型

参考之前的博客：创建物模型

2、ESP8266固件烧录

参考之前的博客：ESP8266固件烧录

3、STM32相关模块

3.1 USART初始化

使用的端口：

• PA2、PA3：ESP8266
• PA9、PA10：串口打印调试

usart.c

#include "usart.h"#if 1
#pragma import(__use_no_semihosting)             
//标准库需要的支持函数                 
struct __FILE 
{ int handle; }; FILE __stdout;       
//定义_sys_exit()以避免使用半主机模式    
void _sys_exit(int x) 
{ x = x; 
} 
//重定义fputc函数 
int fputc(int ch, FILE *f)
{      while((USART1->SR&0X40)==0);//循环发送,直到发送完毕   USART1->DR = (uint8_t) ch;      return ch;
}
#endif // 串口打印初始化
void uart1_init(u32 bound){GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InitStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);	//使能USART1，GPIOA时钟//USART1_TX   GPIOA.9GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9//USART1_RX	  GPIOA.10初始化GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10  //Usart1 NVIC 配置NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//抢占优先级2NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;		//子优先级0NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQ通道使能NVIC_Init(&NVIC_InitStructure);	//根据指定的参数初始化VIC寄存器//USART 初始化设置USART_InitStructure.USART_BaudRate = bound;//串口波特率USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//收发模式USART_Init(USART1, &USART_InitStructure); //初始化串口1USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断USART_Cmd(USART1, ENABLE);                    //使能串口1 
}u8 USART2_RX_BUF[USART2_MAX_RECV_LEN]; 				//接收缓冲,最大USART2_MAX_RECV_LEN个字节.
u8  USART2_TX_BUF[USART2_MAX_SEND_LEN]; 			//发送缓冲,最大USART2_MAX_SEND_LEN字节
vu16 USART2_RX_STA=0;  void esp8266_init(u32 bound){//GPIO端口设置GPIO_InitTypeDef GPIO_InitStructure;USART_InitTypeDef USART_InitStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_APB1PeriphClockCmd(ESP8266_USART_CLK, ENABLE);	//使能USART2，GPIOA时钟RCC_APB2PeriphClockCmd(ESP8266_CLK, ENABLE);//USART2_TX   GPIO_InitStructure.GPIO_Pin = ESP8266_TX; //PA2GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出GPIO_Init(ESP8266_GPIO_PORT, &GPIO_InitStructure);//初始化GPIOA2//USART2_RX	 GPIO_InitStructure.GPIO_Pin = ESP8266_RX;//PA3GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入GPIO_Init(ESP8266_GPIO_PORT, &GPIO_InitStructure);//初始化GPIOA3  //Usart2 NVIC 配置NVIC_InitStructure.NVIC_IRQChannel = ESP8266_NVIC_IRQChannel;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ;//抢占优先级0NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;		//子优先级0NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQ通道使能NVIC_Init(&NVIC_InitStructure);	//根据指定的参数初始化VIC寄存器//USART 初始化设置USART_InitStructure.USART_BaudRate = bound;//串口波特率USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//收发模式USART_Init(ESP8266_USART, &USART_InitStructure); //初始化串口2USART_ITConfig(ESP8266_USART, USART_IT_RXNE, ENABLE);//开启串口接受中断USART_ITConfig(ESP8266_USART, USART_IT_IDLE, ENABLE);//使能UART总线空闲中断USART_Cmd(ESP8266_USART, ENABLE);                    //使能串口2}void ESP8266_Printf(char *fmt, ...)
{u16 i,j; va_list ap; va_start(ap,fmt);vsprintf((char*)USART2_TX_BUF,fmt,ap);va_end(ap);i=strlen((const char*)USART2_TX_BUF);		//此次发送数据的长度for(j=0;j<i;j++)							//循环发送数据{while(USART_GetFlagStatus(USART2,USART_FLAG_TC)==RESET); //循环发送,直到发送完毕   USART_SendData(USART2,USART2_TX_BUF[j]); } }uint8_t USART2_Flag = 0; 
void USART2_IRQHandler(void)                	//串口2中断服务程序
{u8 res;	      if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)//接收到数据{	 res =USART_ReceiveData(USART2);		 USART2_RX_BUF[USART2_RX_STA++]=res;	//记录接收到的值	 USART_ClearFlag(USART2, USART_FLAG_RXNE);}if (USART_GetITStatus(USART2, USART_IT_IDLE) != RESET)       /* UART总线空闲中断 */{USART2_Flag = 1;                                      /* 标记帧接收完成 */USART_ReceiveData(USART2);}} 

usart.h

#ifndef __USART_H__
#define __USART_H__#include "stm32f10x.h"