STM32 控制GSM模块收发信息 F407 discovery

最新推荐文章于 2025-05-20 16:47:50 发布

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最新推荐文章于 2025-05-20 16:47:50 发布 · 4.2k 阅读

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CC 4.0 BY-SA版权

这篇博客详细介绍了如何利用STM32 F407 Discovery板来控制GSM模块进行信息的发送和接收。通过main.c文件的编程实现中断函数，博主展示了具体的硬件连接与软件配置过程。

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main.c

#include "stm32f4_discovery.h"
#include <stdio.h>
 
#define LED1_ON     GPIO_SetBits(GPIOD,GPIO_Pin_12)
#define LED1_OFF	GPIO_ResetBits(GPIOD,GPIO_Pin_12)

#define LED2_ON     GPIO_SetBits(GPIOD,GPIO_Pin_13)
#define LED2_OFF	GPIO_ResetBits(GPIOD,GPIO_Pin_13)

extern uint8_t NbrOfDataToTransfer;
extern uint8_t NbrOfDataToRead;
extern __IO uint8_t TxCounter; 
extern __IO uint16_t RxCounter; 


extern volatile unsigned char MsgAddEnd;
extern volatile unsigned char MsgAdd[5];
extern volatile unsigned char MsgContentEnd;
extern volatile unsigned char MsgContent[240];

void NVIC_Config(void);
void GPIO_Configuration(void);
void STM_EVAL_COMInit(void);
void USART_Configuration(int BaudRate);
void LED_Config(void);
void Delay(__IO uint32_t nCount);

void SendMSG2GF(void);
void MsgRemindInit(void);
void ReadMSG(void);
void JudgeFromMsg(void);
 
int main(void)
{
  /* Configure the system clocks */
  NVIC_Config();                /* NVIC Configuration */
 
//GPIO_Configuration();         /* Configure the GPIOs */
  STM_EVAL_COMInit();  
  
  USART_Configuration(115200);        /* Configure the USART1 's mode */
                                /* Enable the EVAL_COM1 Transmit interrupt: this interrupt is generated when the 
                                   EVAL_COM1 transmit data register is empty */  
  LED_Config();
  
  //SendMSG2GF();
  MsgRemindInit();
  
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  
  while (1)
  {
      Delay(0xFFFF);     
      ReadMSG();
      JudgeFromMsg();
  }
}
void MsgRemindInit()
{
    int i;
    /*AT+CNMI=2,1    短信提示*/
    unsigned char CMD1[13] = {0x41 ,0x54 ,0x2B ,0x43 ,0x4E ,0x4D ,0x49 ,0x3D ,0x32 ,0x2C ,0x31 ,0x0D ,0x0A};
    /*AT+CMGF=1     英文方式发送*/
    unsigned char CMD2[11] = {0x41 ,0x54 ,0x2B ,0x43 ,0x4D ,0x47 ,0x46 ,0x3D ,0x31 ,0x0D ,0x0A};
    
    for(i = 0; i < 13; ++i)
    {
        USART_SendData(USART1, CMD1[i]);
        Delay(0xFFF);
    }
    Delay(0xFFFFFF);
    for(i = 0; i < 11; ++i)
    {
        USART_SendData(USART1, CMD2[i]);
        Delay(0xFFF);
    }
    Delay(0xFFFFFF);
}

void ReadMSG()
{
    int i;
    
    unsigned char CMD1[8] = {0x41 , 0x54 , 0x2B , 0x43 , 0x4D , 0x47 , 0x52 , 0x3D};
    
    unsigned char CMD2[5] = {0xff, 0xff, 0xff, 0xff, 0xff}; // 改回000
    
    unsigned char CMD3[2] = {0x0D, 0x0A};

    while(MsgAddEnd == 0) Delay(1);

    for(i = 0; i < 5; ++i)
    {
        CMD2[i] = MsgAdd[i];
        if(MsgAdd[i] == 0xff) break;
    }
    
    
    MsgAddEnd = 0;
    for(i = 0; i < 5; ++i) MsgAdd[i] = 0xff;
    
    /*tx*/
    
    for(i = 0; i < 8; ++i)
    {
        USART_SendData(USART1, CMD1[i]);
        Delay(0xFFF);
    }
    
    for(i = 0; i < 5; ++i)
    {
        if(CMD2[i] != 0xff)
        {
            if(CMD2[i] == 0x00) break;
            USART_SendData(USART1, CMD2[i]);
            Delay(0xFFF);
        }
        else break;
    }
    
    for(i = 0; i < 2; ++i)
    {
         USART_SendData(USART1, CMD3[i]);
         Delay(0xFFF);
    }
    LED1_ON;
    /*waiting for msg content*/
    while(MsgContentEnd == 0) Delay(1);
    Delay(0xff);
    LED1_OFF;
    MsgContentEnd = 0;
}

void JudgeFromMsg()
{
    int i = 0;
    if(MsgContent[0] == '1')
    {
        LED1_ON ;
        LED2_ON ;
    }
    if(MsgContent[0] == '0')
    {