我编写了以下代码,它使用 GSM SM5100B 向我的手机发送一条简单的消息。但它不起作用。我想用 c++ 代码检查每个 printf 行的输出。例如
AT+CMFG=1
ok
AT+CMGS="69******"
ok
等等。有什么理由要实施这个吗?
我的代码
#include <stdio.h> // standard input / output functions
#include <string.h> // string function definitions
#include <unistd.h> // UNIX standard function definitions
#include <fcntl.h> // File control definitions
#include <errno.h> // Error number definitions
#include <termios.h> // POSIX terminal control definitionss
#include <time.h> // time calls
int open_port(void)
{
int fd; // file description for the serial port
fd = open("/dev/ttyAMA0", O_RDWR | O_NOCTTY | O_NDELAY);
if(fd == -1) // if open is unsucessful
{
printf("open_port: Unable to open /dev/ttyAMA0. \n");
}
else
{
fcntl(fd, F_SETFL, 0);
printf("port is open.\n");
}
return(fd);
} //open_port
int configure_port(int fd) // configure the port
{
struct termios port_settings; // structure to store the port settings in
cfsetispeed(&port_settings, B9600); // set baud rates
cfsetospeed(&port_settings, B9600);
port_settings.c_cflag &= ~PARENB; // set no parity, stop bits, data bits
port_settings.c_cflag &= ~CSTOPB;
port_settings.c_cflag &= ~CSIZE;
port_settings.c_cflag |= CS8;
tcsetattr(fd, TCSANOW, &port_settings); // apply the settings to the port
return(fd);
}
void init_gsm()
{
printf("AT+CMGF=1\r\n");
sleep(3);
printf("AT+CMGS=\"+34603****\"\r\n");
sleep(3);
//printf("Hello\r\n%c",26);
printf("Hello\x1A");
sleep(3);
// printf("\x1A");
}
int main(void)
{
int fd = open_port();
configure_port(fd);
sleep(5);
//query_modem(fd);
init_gsm();
return(0);
}