从LPC2148向手机发送短信

Question

我昨天发布了一个类似的问题，但我无法编辑代码并发布更多问题，所以我在这里重新发布。我已将gsm调制解调器连接到LPC2148，并且正在向我的手机发送一条简单的消息"车辆"。我在两者之间输入了打印语句，以便我知道程序在哪里。它运行所有打印语句，但消息未发送！

所以这是代码

主.c

    #include "i2c.h"                      
    #include "LPC214x.H"                                    // LPC2148 MPU Register
    #include <stdio.h>
    #include "gsm.h"
    #include "lcd.h"
    #include "buzzer.h"

    extern int msgflag;                                                     
    /* Main Program Start Here */
    int main(void)
    {  
       PINSEL0 = 0x00000000;        // Enable GPIO on all pins
    PINSEL1 = 0x00000000;
    PINSEL2 = 0x00000000;

      lcd_init();                                           // Initial LCD
      lcd_write_control(0x01);                              // Clear Display  (Clear Display,Set DD RAM Address=0) 
        goto_cursor(0x00);                                  // Set Cursor Line-1
        //lcd_print("gps");                     // Display LCD Line-1  
         lcd_print("gsm");
         gsmperform();  
 }

GSM.c

#include<lpc214x.h>                                                  /*Header file*/
#include "gsm.h"                                                     //header file
#include "lcd.h"
extern unsigned char cmgf[]="AT+CMGF=1";                            //Text format in GSM modem
extern unsigned char cmgs[]="AT+CMGS="[phone]"";            //Mobile number to which the msg is sent
//extern unsigned char msg[]="*";                                //secret code
extern unsigned char msg[]="vehicle";                                  //secret code
extern unsigned char readall[]="AT+CMGR="REC UNREAD"rn";
//static unsigned char lat[10];
//static unsigned char lon[11];
//extern int blink;
unsigned char content[7];
void txu1(unsigned char data)                 //Transmit a byte of data through UART1
{
while(!(U1LSR & 0x20));                         // Wait until UART1 ready to send character  
    U1THR = data; 
    lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("data");                      // Display LCD Line-1  
}
unsigned char rxu1()
{
unsigned char p;
while ((U1LSR&0x01)!=1);
p=U1RBR;
return p;
}
/*unsigned char rxu0()
{
unsigned char p;
while ((U0LSR&0x01)!=1);
p=U0RBR;
return p;
}
*/
void sendstring(unsigned char *p)            //Sends a string of data through UART1
{
while(1)
{
if(*p=='') break;
txu1(*p++);
}
}
void delaygsm()                           //delay function
{
int i,j;
for(i=0;i<60000;i++)
for(j=0;j<51;j++);
}
void delay2()                             //delay function
{
int i,j;
for(i=0;i<60000;i++)
for(j=0;j<200;j++);
}
unsigned char recuart1()             //recieves a byte from UART1
{
unsigned char p;
while ((U1LSR&0x01)!=1);
p=U1RBR;
return p;
}



void sendmsg(void)
{
sendstring(cmgf);
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("cmgf");                      // Display LCD Line-1  
txu1(0x0d);                                     // equivalent of 
txu1(0x0a);                                     //   enter key
delaygsm();
sendstring(cmgs);
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("cmgs");                      // Display LCD Line-1  
txu1(0x0d);
txu1(0x0a);  
delaygsm();
sendstring(msg);
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("msg");                       // Display LCD Line-1  
//sendstring(lat);
//sendstring(lon);
txu1(0x1a);
delay2();
txu1(0x1a);
}
void initgsm()                               //Initialization of UART0,UART1 and ISR
{
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("begin init");                        // Display LCD Line-1  
    U0LCR=0x83;
U0DLL=0x61;
U0DLM=0x00;
U0LCR=0x03;
U1LCR=0x83;
U1DLL=0x61;
U1DLM=0x00;
U1LCR=0x03;
U1IER=0x01;
U1FCR=0x07;
*/
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("end init");                      // Display LCD Line-1 
    sendmsg();
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("in sendmsg");                        // Display LCD Line-1  
}
void gsmperform(void)
{
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("begin gsm");                     // Display LCD Line-1  
PINSEL0|=0x00050005;
PINSEL1|=0x00000000;
PINSEL2|=0x00000000;
/* nsk   PINSEL0 &= 0xFFF0FFFF;                                 // Reset P0.8,P0.9 Pin Config
  PINSEL0 |= 0x00010000;                                    // Select P0.8 = TxD(UART1)
  PINSEL0 |= 0x00040000;                                    // Select P0.9 = RxD(UART1)
  */

initgsm();
sendstring("ATe0rn");
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("ATe0");                      // Display LCD Line-1  
delaygsm();
sendstring("AT+CMGD=1,4rn");
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("AT+CMGD");                       // Display LCD Line-1  
delaygsm();
sendstring("AT+CNMI=1,0,0,0rn");
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("AT+CNMI");                       // Display LCD Line-1  
delaygsm();
lcd_write_control(0x01);                            // Clear Display  (Clear Display,Set DD RAM Address=0) 
    goto_cursor(0x00);                                  // Set Cursor Line-1
    lcd_print("end gsm");                       // Display LCD Line-1  
}

Answer 1

这里有几件事从根本上说是处理 AT 命令的错误方法。

首先，永远

，永远不要使用像函数delaygsm这样的延迟。您必须更改处理逻辑，以便在发送命令后，除了读取调制解调器的响应外，您绝对不执行任何操作，直到在开始下一个命令之前获得最终结果代码。有关此详细信息，请参阅此答案。

使用 ATE0 关闭 echo 只会让您稍微减少要解析的文本，但这是没有办法的。您必须读取并解析调制解调器返回的响应。这并不复杂，只需按照上面链接的答案中给出的说明进行操作即可。

另请注意，AT 命令行应仅以 'r' 终止（或写为 0x0d ），其他任何内容，有关详细信息，请参阅此答案。