MTK6592的modem---6.gprs的at指令shell测试demo

1. AT的shell

#define LOG_TAG "SPITEST"
//#define LOG_NDEBUG 0

#include <fcntl.h>
#include <sys/prctl.h>
#include <sys/wait.h>
#include <binder/IPCThreadState.h>
#include <binder/ProcessState.h>
#include <binder/IServiceManager.h>
#include <cutils/properties.h>
#include <utils/Log.h>

#include <stdio.h>
#include <string.h>
#include "SPIData.h"
#include "NetClient.h"

#include <termios.h>
#include <unistd.h>

using namespace android;

char recv_buf[1024];
int fd = -1;
static void *readerLoop(void *arg)
{
    int ret;
    while(1)
    {
        memset(recv_buf, 0, sizeof(recv_buf));
        ret = read(fd, recv_buf, sizeof(recv_buf));
        if(ret < 0)
            printf("read error\n");

        printf("%s", recv_buf);
    }
    return NULL;
}

int main(int argc, char*argv[])
{
    struct termios termOptions;
    int ret,i;
    pthread_t s_tid_reader;
    pthread_attr_t attr;
    char send_buf[1024];
    char prev_buf[1024];
    //char send_buf[1024]="AT+COPN=?";
    //char send_buf[1024]="AT+CRSM=?";
    //char send_buf[1024]="AT+CGMI";
    //char send_buf[1024]="ATE\n";
    //char send_buf[1024]="ATI\n";
    fd=open("/dev/ttyMT3", O_RDWR);

    // fcntl(fd, F_SETFL, 0);
    //1. 串口的配置
    // Get the current options:
    tcgetattr(fd, &termOptions);

    // Set 8bit data, No parity, stop 1 bit (8N1):
    termOptions.c_cflag &= ~PARENB; //no parity
    termOptions.c_cflag &= ~CSTOPB; //1 stop bit
    termOptions.c_cflag &= ~CSIZE;
    termOptions.c_cflag |= CS8 | CLOCAL | CREAD;
    termOptions.c_cflag &= ~CRTSCTS;
    // Raw mode
       termOptions.c_iflag &= ~(INLCR | ICRNL | IXON | IXOFF | IXANY);
    termOptions.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); /*raw input*/
    termOptions.c_oflag &= ~OPOST; /*raw output*/
    termOptions.c_oflag |= ONLCR; /*raw output*/

    tcflush(fd,TCIFLUSH);//clear input buffer
    termOptions.c_cc[VTIME] = 10; /* inter-character timer unused, wait 1s, if no data, return */
    termOptions.c_cc[VMIN] = 0; /* blocking read until 0 character arrives */

    cfsetispeed(&termOptions, B115200); /*set baudrate to 115200, which is 3332 default bd*/
    cfsetospeed(&termOptions, B115200);
    tcsetattr(fd, TCSANOW, &termOptions);

    //read thread
    pthread_attr_init (&attr);
    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
    ret = pthread_create(&s_tid_reader, &attr, readerLoop, &attr);    //3.接收并不与发送同步所以这儿需要加一个线程来不断的读取
    if (ret < 0) {
        perror ("pthread_create");
        return -1;
    }

    while(fgets(send_buf,sizeof(send_buf),stdin) != NULL)
    {
        int len = strlen(send_buf);
        //for(i=0; i<len; i++)
        // printf("%d=0x%x\n", i, send_buf[i]);
        //printf("\n");
        if( (0x1b==send_buf[0]) && (0x5b==send_buf[1]) && (0x41==send_buf[2]))
        {
            //up arrow pressed
            ret = write(fd, prev_buf, strlen(prev_buf));
        }else if(0x0a==send_buf[0]) {
            memset(send_buf, 0, sizeof(send_buf));
        }else {
            send_buf[len-1] = '\r';                //2.指令必须以\r\n结束,否则gprs模块不认这条指令
            send_buf[len] = '\0';                  //据说可以通过配置串口来自动发送\r\n,但是没有成功
#if 0                                              //有知道的告诉一下,谢谢！！！！
            send_buf[len-1] = '\r';
            send_buf[len] = '\n';
            send_buf[len+1]='\0';
#endif
            ret = write(fd, send_buf, strlen(send_buf));
            if(ret < 0)
                printf("write error\n");
            memset(prev_buf, 0, sizeof(prev_buf));
            memcpy(prev_buf, send_buf, strlen(send_buf));
            memset(send_buf, 0, sizeof(send_buf));
        }
    #if 0
        memset(recv_buf, 0, sizeof(recv_buf));
        ret = read(fd, recv_buf, sizeof(recv_buf));
        if(ret < 0)
            printf("read error\n");

        printf("%s", recv_buf);
    #endif
    }
    return 0;
}

这儿有三点需要注意:
    a. 串口的配置,如何设置8n1
    b. 发送的字符串必须是以 \r\n结束,要不gprs模块不认这个指令
    c. 加了一个read的线程,是因为接收并不与发送同步
2.
Android.mk

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_SRC_FILES:= \
    main_spi.cpp


LOCAL_SHARED_LIBRARIES := \
    libutils \
    libcutils \
    liblog \
    libhardware_legacy \
    libbinder

LOCAL_C_INCLUDES := $(JNI_H_INCLUDE) \
    frameworks/base/services/input
LOCAL_MODULE_TAGS := optional

LOCAL_MODULE:= spi_server

include $(BUILD_EXECUTABLE)

3.
编译命令

./mk -t mm ./frameworks/ireadygo/server/native
adb remount
adb push out/target/product/mt92_wet_jb9/system/lib/libgprs_ireadygo.so /system/lib/
adb push out/target/product/mt92_wet_jb9/system/bin/spi_gprs /system/bin/spi_gprs
adb shell sync