Test the GSM/GPRS module of Linux and Android platforms

Here we record whether the driver of the modem module works properly on a common Linux or Android smartphone platform in a quick way. Note that the program running depends on the cross compiler version. It must be a compiler with a serial library function, such as 2008q3. After compilation is completed, a series of options to be entered are displayed for testing projects.

(1) Main Function

// This is a test about GPRS # include <stdio. h> # include <string. h> # include <stdlib. h> # include <fcntl. h> # include <unistd. h> # include <termios. h> // set baud rate, which must be included in the library # include <fcntl. h> # include <sys/select. h> # include <sys/time. h> # include <sys/types. h> # define func_run0 # define func_not_run1 // Test Project # define simple_test 1 # define read_sim_card_id 2 # define gsm_upls_signal3 # define make_a_call 4 # define Wai T_a_call 5 # define short_message 6 # define power_manage 7 # define func_quit 8 // Short Message test subproject # define send_short_message1 # define definition # define Definition 3 # define definition # define device_ttys "/dev/ s3c2410_serial1 "// UART port allocated by modem # define region # define receive_buf_wait_1s 1 # define receive_buf_wait_2s 2 # define receive_buf_wait_3s 3 # define receive_buf_wa It_4s 4 # define receive_buf_wait_5s 5int main (void) {int FD; printf ("\ ngsm/GPRS tests \ n"); FD = open (device_ttys, o_rdwr ); // enable the tty device if (FD =-1) {printf ("open device % s error \ n", device_ttys);} else {init_ttys (FD ); // init device func_gsm (FD); // GSM/GPRS functions if (close (FD )! = 0) printf ("Close device % s error", device_ttys) ;}return 0 ;}

Configure tty Functions

void init_ttyS(int fd){struct termios options;bzero(&options, sizeof(options));       // clear optionscfsetispeed(&options,B115200);            // setup baud ratecfsetospeed(&options,B115200);options.c_cflag |= (CS8 | CREAD);options.c_iflag = IGNPAR;tcflush(fd, TCIFLUSH);tcsetattr(fd, TCSANOW, &options);}

Modem Test Module main function

Void func_gsm (int fd) {int flag_func_run; int flag_select_func; ssize_t ret; flag_func_run = func_run; while (flag_func_run = func_run) {print_prompt (); // print select functions TXT scanf ("% d", & flag_select_func); // user input select getchar (); Switch (flag_select_func) {Case simple_test: {gsm_simple_test (FD ); break;} case read_sim_card_id: {fuse (FD); break;} case gsm_upls_signal: {gsm_upls_signal (FD); break;} case make_a_call: {gsm_call (FD); break ;} case wait_a_call: {gsm_wait_call (FD); break;} case short_message: {gsm_short_mesg (FD); break;} case power_manage: {gsm_power_manage (FD); break ;} // break exits the switch, but does not exit while case func_quit: {flag_func_run = func_not_run; printf ("Quit GSM/GPRS function. byebye \ n "); break;} default: {printf (" Please input your select use 1 to 7 \ n ");}}}}

Text prompt options:

void print_prompt(void){        printf ("Select what you want to do:\n");        printf ("1 : Simple Test\n");        printf ("2 : Read SIM CARD ID\n");        printf ("3 : Test GSM/GPRS signal\n");        printf ("4 : Make A Call\n");        printf ("5 : Wait A Call\n");        printf ("6 : Short message\n");        printf ("7 : Power manage\n");        printf ("8 : Quit\n");        printf (">");} // end print_prompt

(2) control details of each test sub-option at command: Case simple_test

void GSM_simple_test(int fd){char *send_buf="at\r";GSM_GPRS_send_cmd_read_result(fd,send_buf,RECEIVE_BUF_WAIT_1S);} 

Screen ECHO:

At
OK

(3) public functions used

Send at command and read result

void GSM_GPRS_send_cmd_read_result(int fd, char *send_buf, int rcv_wait){         char rcv_buf[2048];if((send_buf==NULL) || (send_GSM_GPRS_cmd(fd,send_buf))){// send success , then readbzero(rcv_buf,sizeof(rcv_buf));if (read_GSM_GPRS_datas(fd,rcv_buf,rcv_wait)){                        printf ("%s\n",rcv_buf);                }                else{                        printf ("read error\n");                }}else{printf("write error\n");}} 

Send at command

int send_GSM_GPRS_cmd(int fd, char *send_buf){ssize_t ret;ret = write(fd,send_buf,strlen(send_buf));if (ret == -1)         {                printf ("write device %s error\n", DEVICE_TTYS);                return -1;         }return 1;} 

Read at Response Results

Int read_gsm_upls_datas (int fd, char * rcv_buf, int rcv_wait) {int retval; fd_set rfds; struct timeval TV; int ret, Pos; TV. TV _sec = rcv_wait; // wait 2.5 s TV. TV _usec = 0; Pos = 0; // point to rceeive bufwhile (1) {fd_zero (& rfds); fd_set (FD, & rfds); retval = select (FD + 1, & rfds, null, null, & TV); If (retval =-1) {// timeout perror ("select ()"); break;} else if (retval) {// determine whether there is data ret = read (FD, rcv_buf + POs, 2048 ); POS + = ret; // read data length if (rcv_buf [pos-2] = '\ R' & rcv_buf [pos-1] =' \ n ') {// if you read the fd_zero (& rfds); fd_set (FD, & rfds); retval = select (FD + 1, & rfds, null, null, & TV) at the end of the string ); if (! Retval) break; // No datas, break} else {printf ("no data \ n"); break ;}} return 1 ;}

(4) 2, read SIM card EF-CCID, Case read_sim_card_id

void GSM_read_sim_card_id(int fd){        char *send_buf="at+ccid\r";        GSM_GPRS_send_cmd_read_result(fd,send_buf,RECEIVE_BUF_WAIT_1S);} 

Screen ECHO:

At + CCID
89860076190753501064

(5) obtain the network parameter case gsm_upls_signal.

Void gsm_upls_signal (int fd) {char * send_buf = "at + CREG? \ R "; // The Network registers gsm_upls_send_assist_read_result (FD, send_buf, receive_buf_wait_1s); send_buf =" at + cgreg? \ R "; Evaluate (FD, send_buf, receive_buf_wait_1s); send_buf =" at + CSQ \ r "; // signal quality measures (FD, send_buf, receive_buf_wait_1s ); send_buf = "at + cops? \ R "; // carrier information gsm_upls_send_assist_read_result (FD, send_buf, receive_buf_wait_1s );}

Screen ECHO:

At + CREG?
+ CREG: 0, 1

OK

At + cgreg?
+ Cgreg: 0, 1

OK

At + CSQ
+ CSQ: 25, 0

OK

At + cops?
+ Cops: 0, 0, "China Mobile"

OK

(6) dialing case make_a_call

Void gsm_call (int fd) {char send_buf [17]; // The sending buffer char * send_wash_ath = "ath \ r"; // The Hanging command int I; // Input Telephone Number bzero (send_buf, sizeof (send_buf); send_buf [0] = 'a'; send_buf [1] = 'T '; send_buf [2] = 'D'; send_buf [16] = '\ 0'; printf ("Please Input Telephone number:"); I = 3; while (1) {send_buf [I] = getchar (); // obtain the input if (send_buf [I] = '\ n') break from the standard input device "keyboard; I ++;} send_buf [I] = '; // Add the symbol after sending the command; send_buf [I + 1] =' \ R '; // end input telphone number // send cmdgsm_upls_send_assist_read_result (FD, send_buf, receive_buf_wait_1s); // dial // quit call printf ("Press ENTER for quit:"); getchar (); // press any key to exit dialing // send cmdgsm_upls_send_assist_read_result (FD, send_assist_ath, receive_buf_wait_1s); // host up}

Screen ECHO:

Please input telephone number: 112
112
Atd112;
OK
(7) wait for the call case wait_a_call

Void gsm_wait_call (int fd) {char rcv_buf [2048]; char * send_wash_ath = "ath \ r"; // host int wait_ring; wait_ring = 10; // wait 10 times while (wait_ring! = 0) {bzero (rcv_buf, sizeof (rcv_buf); If (read_gsm_upls_datas (FD, rcv_buf, callback) {printf ("% s \ n", rcv_buf ); // wait for a response} else {printf ("read error \ n");} wait_ring --;} gsm_upls_send_assist_read_result (FD, send_assist_ath, receive_buf_wait_1s ); printf ("Quit wait_call \ n ");}

The screen ECHO is as follows: if a phone is dial in, the ring is displayed.

No data

Ring

No data

No data

No data

Ring

No data

No data

No data

Ring

ATH
OK

Quit wait_call

(8) Short Message Service case short_message

Void gsm_short_mesg (int fd) {int flag_sm_run, flag_sm_select; flag_sm_run = func_run; while (flag_sm_run = func_run) {printf ("\ n select: \ n "); printf ("1: send Short Message \ n"); printf ("2: Read all short message \ n"); printf ("3: config Short Message env \ n "); // short message center printf (" 4: Quit \ n "); printf ("> "); scanf (" % d ", & flag_sm_select); // enter the select option getchar (); // wait for the keyboard to enter switch (flag_sm_select) {Case send_short_message: {gsm_send_message (FD); break;} case read_short_message: {gsm_read_message (FD); break;} case config_short_message_env: {gsm_conf_message (FD); break;} case quit_short_message: {flag_sm_run = func_not_run; break;} default: {printf ("Please input your select use 1 to 3 \ n") ;}} printf ("\ n") ;}// end gsm_send_mesg

A. Configure the short message center first.

Void gsm_conf_message (int fd) {char * send_buf = "at + cmgf = 1 \ r "; // set the SMS control mode char * send_center_buf = "at + csca = \" + 8613800755500 \ "\ r"; // SMS service center address gsm_upls_send_assist_read_result (FD, send_buf, receive_buf_wait_1s); // set short message center number gsm_upls_send_assist_read_result (FD, send_center_buf, receive_buf_wait_1s); printf ("End config Short Message env \ n ");}

Echo:

At + cmgf = 1
OK

At + csca = "+ 8613800571500"
OK

End config Short Message env

B. send information

Void gsm_send_message (int fd) {char 1__buf [23]; char short_message_buf [empty]; int I; char rcv_buf; bzero (1__buf, sizeof (1__buf); bzero (empty, sizeof (short_message_buf); printf ("send short message: \ n"); pai_buf [0] = 'a'; pai_buf [1] = 'T '; pai_buf [2] = '+'; pai_buf [3] = 'C'; pai_buf [4] = 'M'; pai_buf [5] = 'G '; pai_buf [6] ='s '; pai_buf [7] ='; pai_buf [8] = '"'; // At + cmgs send Short Message command printf ("Please Input Telephone number:"); I = 9; while (1) {pai_buf [I] = getchar (); if (pai_buf [I] = '\ n') break; I ++; // enter the number} else _buf [I] = '"'; pai_buf [I + 1] = '\ R'; pai_buf [I + 2] =' \ 0'; // Add the terminator // send cmd: at + cmgs = "(telephone number)" gsm_upls_send_assist_read_result (FD, cmd_buf, receive_buf_wait_1s); // input Short Message printf ("Please input short message:"); I = 0; while (I <MAX_LEN_OF_SHORT_MESSAGE-2) {short_message_buf [I] = getchar (); If (short_message_buf [I] = '\ n') break; I ++ ;} short_message_buf [I] = 0x1a; short_message_buf [I + 1] = '\ R'; short_message_buf [I + 2] =' \ 0'; // send Short Message Digest (FD, short_message_buf, receive_buf_wait_4s); printf ("\ nend send Short Message \ n ");}

Echo:

Send Short Message:
Please input telephone number: 13800138000
At + cmgs = "13800138000"
OK

Please input short message: teset
Teset
Teset
OK

C. Short Messages for reading SIM cards

Void gsm_read_message (int fd) {char * send_buf = "at + cmgl = \" all \ "\ r"; // read the short message char rcv_buf from the SIM card [2048]; gsm_upls_send_assist_read_result (FD, send_buf, receive_buf_wait_3s); printf ("End read all short message \ n ");}

Echo:

At + cmgl = "all"
+ Cmgl: 1, "rec read", "+ 8613800138000", "11/03/17,21: 44: 39 + 32" followed by a large amount of information. Complete.