Android 2.1下调试3G模块

Android 2.1下调试3G模块

曾几何时在Android2.1下调试3G模块，曾几何时模块厂商提供的库不能用，曾几何时只能用自己的库痛苦地调试...这一切的一切都已成往事，昔日的成功在毫无保留下成为浮云，该忘了忘记了，该记得也跟着忘记了。现如今再次调3G模块，却不知道以前如何调试，看来还是要记下来。 我采用的是华为EM770W模块，支持WCDMA网络，由于华为提供的库只支持Android2.2，所以用Android2.1就需要自己修改库源码。   1.修改linux内核 （1）make menuconfig： Device Drivers  --->     <*> OHCI HCD support      [*] Network device support  --->          <*>   PPP (point-to-point protocol) support          [*]     PPP multilink support (EXPERIMENTAL)          [*]     PPP filtering          <*>     PPP support for async serial ports          <*>     PPP support for sync tty ports          <*>     PPP Deflate compression          <*>     PPP BSD-Compress compression          <*>     PPP MPPE compression (encryption) (EXPERIMENTAL)          <*>     PPP over Ethernet (EXPERIMENTAL)          <*>     PPP over L2TP (EXPERIMENTAL)     [*] USB support  --->          <*>   USB Serial Converter support  --->                <*>   USB driver for GSM and CDMA modems （2）增加EM770W的VID和PID 修改驱动文件drivers/usb/serial/option.c，增加以下代码 #define EM770W_OPTION_VENDOR_ID 0x12d1
#define EM770W_OPTION_PRODUCT_COLT 0x1001   static struct usb_device_id option_ids[] = {
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
…
{ USB_DEVICE(EM770W_OPTION_VENDOR_ID , EM770W_ OPTION_PRODUCT_COLT) },
} 驱动修改后插上3G模块，kernel运行后可在/dev下出现ttyUSB0、ttyUSB1  、ttyUSB2、ttyUSB3、ttyUSB4、ttyUSB5和ppp设备文件    2.修改RIL代码 （1）在ril/reference-ril/Android.mk添加一行： LOCAL_CFLAGS += -DHUAWEI_EM770W （2）在ril/reference-ril/atchannel.c中增加的代码

1. #include <termios.h>
   
2. 
   
3. static int urc_fd = -1; /* fd of the URC channel */
   
4. static char s_URCBuffer[MAX_AT_RESPONSE+1];
   
5. static char *s_URCBufferCur = s_URCBuffer;
   
6. static pthread_t s_tid_reader_urc;

1. static const char *urc_readline()
   
2. {
   
3.     ssize_t count;
   
4.     char *p_read = NULL;
   
5.     char *p_eol = NULL;
   
6.     char *ret;
   
8.     if (*s_URCBufferCur == '\0') {
   
9.         s_URCBufferCur = s_URCBuffer;
   
10.         *s_URCBufferCur = '\0';
    
11.         p_read = s_URCBuffer;
    
12.     } else {
    
13.         while (*s_URCBufferCur == '\r' || *s_URCBufferCur == '\n')
    
14.             s_URCBufferCur++;
    
15.         p_eol = findNextEOL(s_URCBufferCur);
    
16.         if (p_eol == NULL) {
    
17.             size_t len;
    
18.             len = strlen(s_URCBufferCur);
    
19.             memmove(s_URCBuffer, s_URCBufferCur, len + 1);
    
20.             p_read = s_URCBuffer + len;
    
21.             s_URCBufferCur = s_URCBuffer;
    
22.         }
    
23.     }
    
24.     while (p_eol == NULL) {
    
25.         if (0 == MAX_AT_RESPONSE - (p_read - s_URCBuffer)) {
    
26.             LOGE("ERROR: Input line exceeded buffer\n");
    
27.             s_URCBufferCur = s_URCBuffer;
    
28.             *s_URCBufferCur = '\0';
    
29.             p_read = s_URCBuffer;
    
30.         }
    
31.         do {
    
32.             count = read(urc_fd, p_read, MAX_AT_RESPONSE - (p_read - s_URCBuffer));
    
33.         } while (count < 0 && errno == EINTR);
    
34.         if (count > 0) {
    
35.             AT_DUMP( "<< ", p_read, count );
    
36.             s_readCount += count;
    
37.             p_read[count] = '\0';
    
38.             while (*s_URCBufferCur == '\r' || *s_URCBufferCur == '\n')
    
39.                 s_URCBufferCur++;
    
40.             p_eol = findNextEOL(s_URCBufferCur);
    
41.             p_read += count;
    
42.         } else if (count <= 0) {
    
43.             if(count == 0) {
    
44.                 LOGD("atchannel: EOF reached");
    
45.             } else {
    
46.                 LOGD("atchannel: read error %s", strerror(errno));
    
47.             }
    
48.             return NULL;
    
49.         }
    
50.     }
    
51.     ret = s_URCBufferCur;
    
52.     *p_eol = '\0';
    
53.     s_URCBufferCur = p_eol + 1; 
54.     LOGD("AT< %s\n", ret);
    
55.     return ret;
    
56. }
    
57. 
    
58. static void *urc_readerLoop(void *arg)
    
59. {
    
60.     for (;;) {
    
61.         const char * line;
    
62.         line = urc_readline();
    
63.         if (line == NULL) {
    
64.             break;
    
65.         }
    
66.         if(isSMSUnsolicited(line)) {
    
67.             char *line1;
    
68.             const char *line2;
    
69.             line1 = strdup(line);
    
70.             line2 = readline();
    
71.             if (line2 == NULL) {
    
72.                 break;
    
73.             }
    
74.             if (s_unsolHandler != NULL) {
    
75.                 s_unsolHandler (line1, line2);
    
76.             }
    
77.             free(line1);
    
78.         } else {
    
79.             processLine(line);
    
80.         }
    
81.     }
    
82.     onReaderClosed();
    
83.     return NULL;
    
84. }

（3）修改ril/reference-ril/atchannel.c中的at_open函数，增加HUAWEI_EM770W宏控制的代码

1.     pthread_attr_init (&attr);
   
2.     pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
   
3. 
   
4. #ifdef HUAWEI_EM770W
   
5.     int fd2 = -1;
   
6.     while(fd2 < 0) {
   
7.         fd2 = open ("/dev/ttyUSB2", O_RDWR);
   
8.         if (fd2 < 0) {
   
9.             perror ("opening URC interface. retrying...");
   
10.             sleep(10);
    
11.         }
    
12.     }
    
13.     if(fd2 > 0) {
    
14.         urc_fd = fd2;
    
15.         struct termios ios;
    
16.         tcgetattr( fd2, &ios );
    
17.         ios.c_lflag = 0;
18.         tcsetattr( fd2, TCSANOW, &ios );
    
19.     }
    
20.     ret = pthread_create(&s_tid_reader_urc, &attr, urc_readerLoop, &attr);
    
21.     if (ret < 0) {
    
22.         perror ("pthread_create");
    
23.         return -1;
    
24.     }
    
25. #endif
    
26. 
    
27.     ret = pthread_create(&s_tid_reader, &attr, readerLoop, &attr);

（4）在ril/reference-ril/reference-ril.c中修改的代码

1. +#include <cutils/properties.h>
   
2. 
   
3. -#define PPP_TTY_PATH "/dev/omap_csmi_tty1"
   
4. +#define PPP_TTY_PATH "/dev/ppp0"
   
5. 
   
6. - /* Not muted */
   
7. - at_send_command("AT+CMUT=0", NULL);
   
8. + /* Set muted */
   
9. + at_send_command("AT+CMUT=1", NULL);
   
10. 
    
11. - if ( fd >= 0 && !memcmp( s_device_path, "/dev/ttyS", 9 ) ) {
    
12. + if ( fd >= 0) {
    
13. 
    
14.      /*    
    
15.      asprintf(&cmd, "AT+CGDCONT=1,\"IP\",\"%s\",,0,0", apn);
    
16.      //FIXME check for error here
    
17.      err = at_send_command(cmd, NULL);
    
18.      free(cmd);
    
19.      // Set required QoS params to default
    
20.      err = at_send_command("AT+CGQREQ=1", NULL);
    
21.      // Set minimum QoS params to default
    
22.      err = at_send_command("AT+CGQMIN=1", NULL);
    
23.      // packet-domain event reporting
    
24.      err = at_send_command("AT+CGEREP=1,0", NULL);
    
25.      // Hangup anything that's happening there now
    
26.      err = at_send_command("AT+CGACT=1,0", NULL);
    
27.      // Start data on PDP context 1
    
28.      err = at_send_command("ATD*99***1#", &p_response);
    
29.      if (err < 0 || p_response->success == 0) {
    
30.          goto error;
    
31.      }
32.      */
34.    + property_set("ctl.start","pppd_gprs");
    
35.    RIL_onRequestComplete(t, RIL_E_SUCCESS, response, sizeof(response));
    
36.    at_response_free(p_response);

（5）在ril/rild/rild.c中修改的代码

1. +#if 0
   
2.      /* special override when in the emulator */
   
3. -#if 1
   
4.      {
   
5.          static char* arg_overrides[3];
   
6.          static char arg_device[32];
   
7. 
   
8.  //switchUser();

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