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Ubuntu下搭建TQ2440的程序下载环境

我使用的Ubuntu 10.04,以下是我搭建实验环境的过程,其他版本的Ubuntu其搭建过程可能会略有不同,请读者自行查阅相关资料解决。


1.必须使用一款类似于windows下SecureCRT的软件:minicom。先下载minicom:


sudo apt-get install minicom


安装完毕之后,使用如下命令行测试一下:


sudo minicom -s


会出现如下结果:


            +—–[configuration]——+


            | Filenames and paths      |


            | File transfer protocols  |


            | Serial port setup        |


            | Modem and dialing        |


            | Screen and keyboard      |


            | Save setup as dfl        |


            | Save setup as..          |


            | Exit                     |


            | Exit from Minicom        |


            +————————–+


通过光标可以上下选择相应的配置项,按回车即可确定。


由于我使用的是笔记本电脑,所以便遇到USB转串口的问题。首先我们得先检查ubuntu有无USB转串口的驱动(ubuntu中不用安装什么USB转串口驱动)


我发现在/dev下没有ttyUSB0这个文件,www.linuxidc.com不过可以自行创建一个:


sudo mknod /dev/ttyUSB0 c 188 0


如果使用的是串口线,就设置为/dev/ttyS0


然后我们重新进入minicom进行配置:


sudo minicom -s


选择Serial port setup ,进行如下设置:


    | A –    Serial Device      : /dev/ttyUSB0                              |


    | B – Lockfile Location     : /var/lock                                 |


    | C –   Callin Program      :                                           |


    | D –  Callout Program      :                                           |


    | E –    Bps/Par/Bits       : 115200 8N1                                |


    | F – Hardware Flow Control : No                                        |


    | G – Software Flow Control : No                                        |


设置完成之后,选择Save setup as dfl  ,这样下次就不用重新配置。


接着插上USB转串口线,重启minicom就能看到


Welcome to minicom 2.4


OPTIONS: I18n


Compiled on Jan 25 2010, 06:49:09.


Port /dev/ttyUSB0


Press CTRL-A Z for help on special keys


接着打开TQ2440的电源,就能看到:(此时我是从NAND Flash下启动)


<***************************************>           


               TQ2440 Test Program                  


                www.linuxidc.com


<***************************************>


这就说明你的板子已经跟电脑连接在一起了。


minicom有一个很不好的地方,就是你一拉大或者缩小终端,屏幕就会被清空,这点要注意一下。


如果你要进入下载模式,那就从NOR Flash重新启动开发板,这时候会出现u-boot的信息:


#####    Boot for Nor Flash Main Menu   #####                                  


#####     EmbedSky USB download mode     #####                                 


[1] Download u-boot or STEPLDR.nb1 or other bootloader to Nand Flash           


[2] Download Eboot (eboot.nb0) to Nand Flash                                   


[3] Download Linux Kernel (zImage.bin) to Nand Flash                           


[5] Download CRAMFS image to Nand Flash                                        


[6] Download YAFFS image (root.bin) to Nand Flash                              


[7] Download Program (uCOS-II or TQ2440_Test) to SDRAM and Run it              


[8] Boot the system                                                            


[9] Format the Nand Flash                                                      


[0] Set the boot parameters                                                    


[a] Download User Program (eg: uCOS-II or TQ2440_Test)                         


[b] Download LOGO Picture (.bin) to Nand  Flash                                


[l] Set LCD Parameters                                                         


[n] Enter TFTP download mode menu                                              


[o] Download u-boot to Nor Flash                                               


[r] Reboot u-boot                                                              


[t] Test Linux Image (zImage)                                                  


[q] quit from menu                                                             


Enter your selection:


(如果没有出现的话就按一下复位键)


这时候不要忘了插上USB host,不然在下载的过程就会出现USB host is not connected now的情况。

现在我们需要一个Linux下的类似于DNW的工具,这个工具没有windows下的图形界面,而且代码非常之精简,直接编译之后便可使用:


我们先新建一个名为DNW.c的文件,往里面复制以下代码:


/* dnw2 linux main file. This depends on libusb.


*


* Author: Fox <hulifox008@163.com>


* License: GPL


*


*/


#include <stdio.h>


#include <usb.h>


#include <errno.h>


#include <sys/stat.h>


#include <fcntl.h>


#include <unistd.h>


#define QQ2440_SECBULK_IDVENDOR 0x5345


#define QQ2440_SECBULK_IDPRODUCT 0x1234


struct usb_dev_handle * open_port()


{


struct usb_bus *busses, *bus;


usb_init();


usb_find_busses();


usb_find_devices();


busses = usb_get_busses();


for(bus=busses;bus;bus=bus->next)


{


struct usb_device *dev;


for(dev=bus->devices;dev;dev=dev->next)


{


printf(“idVendor:0x%x\t,ipProduct:0x%x\n”,dev->descriptor.idVendor,dev->descriptor.idProduct);


if( QQ2440_SECBULK_IDVENDOR==dev->descriptor.idVendor


&& QQ2440_SECBULK_IDPRODUCT==dev->descriptor.idProduct)


{


printf(“Target usb device found!\n”);


struct usb_dev_handle *hdev = usb_open(dev);


if(!hdev)


{


perror(“Cannot open device”);


}


else


{


if(0!=usb_claim_interface(hdev, 0))


{


perror(“Cannot claim interface”);


usb_close(hdev);


hdev = NULL;


}


}


return hdev;


}


}


}


printf(“Target usb device not found!\n”);


return NULL;


}


void usage()


{


printf(“Usage: dnw2 <file>\n\n”);


}


unsigned char* prepare_write_buf(char *filename, unsigned int *len)


{


unsigned char *write_buf = NULL;


struct stat fs;


int fd = open(filename, O_RDONLY);


if(-1==fd)


{


perror(“Cannot open file”);


return NULL;


}


if(-1==fstat(fd, &fs))


{


perror(“Cannot get file size”);


goto error;


}


write_buf = (unsigned char*)malloc(fs.st_size+10);


if(NULL==write_buf)


{


perror(“malloc failed”);


goto error;


}


if(fs.st_size != read(fd, write_buf+8, fs.st_size))


{


perror(“Reading file failed”);


goto error;


}


printf(“Filename : %s\n”, filename);


printf(“Filesize : %d bytes\n”, fs.st_size);


*((u_int32_t*)write_buf) = 0x30000000; //download address


*((u_int32_t*)write_buf+1) = fs.st_size + 10; //download size;


*len = fs.st_size + 10;


return write_buf;


error:


if(fd!=-1) close(fd);


if(NULL!=write_buf) free(write_buf);


fs.st_size = 0;


return NULL;


}


int main(int argc, char *argv[])


{


if(2!=argc)


{


usage();


return 1;


}


struct usb_dev_handle *hdev = open_port();


if(!hdev)


{


return 1;


}


unsigned int len = 0;


unsigned char* write_buf = prepare_write_buf(argv[1], &len);


if(NULL==write_buf) return 1;


unsigned int remain = len;


unsigned int towrite;


printf(“Writing data …\n”);


while(remain)


{


towrite = remain>512 ? 512 : remain;


if(towrite != usb_bulk_write(hdev, 0x03, write_buf+(len-remain), towrite, 3000))


{


perror(“usb_bulk_write failed”);


break;


}


remain-=towrite;


printf(“\r%d%\t %d bytes “, (len-remain)*100/len, len-remain);


fflush(stdout);


}


if(0==remain) printf(“Done!\n”);


return 0;


}


点击保存即可。


接着打开终端编译这个文件:


gcc DNW.c -o dnw -lusb


接着你可以发现当前目录下多了一个dnw的bin文件。我们可以将其复制到用户目录下就可以全局使用这个指令了:


sudo cp dnw /usr/local/bin


现在当你输入dnw命令的时候,会出现


Usage: dnw2 <file>


的用法提示。


我们现在可以测试一下下载过程:


1.连接好开发板(USB转串口线和USB host线);


2.打开终端,输入minicom,看到连接成功的提示;


3.从NOR Flash启动开发板,从minicom上看到u-boot的提示,这里我们按7并回车(该选项可烧写裸机程序);


这时会看到提示waiting download的提示;


4.再打开一个终端,找到所要下载进开发板的bin程序,直接(一定要sudo,不然无法成功)


sudo dnw <file>   (file表示文件的路径)


这时便可看到烧写成功的提示了。

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