嵌入式学习（1）---ubuntu12.04（32位）下TQ2440开发板环境搭建

ubuntu12.04（32位）下TQ2440开发板环境搭建

Step 1.安装arm-linux-gcc交叉编译器

这里我使用的是天嵌tq2440光盘下的EABI-4.3.3_EmbedSky_20100610.tar.bz2安装包。

1、在根目录下解压EABI-4.3.3_EmbedSky_20100610.tar.bz2

sudo tar -xvfEABI-4.3.3_EmbedSky_20100610.tar.bz2-C/

2、打开/etc/environment文本

sudo vi /etc/environment

并修改PATH,添加蓝色字部分

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/EmbedSky/4.3.3/bin"

然后在终端输入arm-linux-gcc-v，如果出现如下信息，说明安装成功！

Step2:安装minicom

1、sudo apt-get install minicom安装minicom

2、设置minicom参数

输入sudo minicom -s

选择 ”Serial port setup“，并修改参数如下：

由于我们使用USB转串口，这里使用ttyUSB0。

然后再选择"Save setup as dfl"，以后每次打开minicom就不用重新配置参数，

接下来介入开发班的数据先，如果出现下面的信息，表示成功！

##### EmbedSky BIOS for SKY2440/TQ2440 #####
Press Space key to Download Mode !
##### Boot for Nor Flash Main Menu #####
[1] Download u-boot or STEPLDR.nb1 or other bootloader to Nand Flash
[2] Download Eboot to Nand Flash
[3] Download Linux Kernel to Nand Flash
[5] Download CRAMFS image to Nand Flash
[6] Download YAFFS image 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
[o] Download u-boot to Nor Flash
[r] Reboot u-boot
[t] Test Linux Image (zImage)
[q] quit from menu
Enter your selection:

Step3:安装dnw2下载工具

1. 安装libusb-dev库

sudo apt-get install libusb-dev

2. 编译dnw2源码

/* dnw2 linux main file. This depends on libusb.
*
* Author: Fox <[e-mail]>
* License: GPL
*
*/

#include<stdio.h>
#include<usb.h>
#include<errno.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>

#defineQQ2440_SECBULK_IDVENDOR 0x5345
#defineQQ2440_SECBULK_IDPRODUCT 0x1234


structusb_dev_handle*open_port()
{
structusb_bus*busses,*bus;

usb_init();
usb_find_busses();
usb_find_devices();

busses=usb_get_busses();
for(bus=busses;bus;bus=bus->next)
{
structusb_device*dev;
for(dev=bus->devices;dev;dev=dev->next)
{
if(QQ2440_SECBULK_IDVENDOR==dev->descriptor.idVendor
&&QQ2440_SECBULK_IDPRODUCT==dev->descriptor.idProduct)
{
printf("Target usb device found!\n");
structusb_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;
}
}
returnhdev;
}
}
}

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

returnNULL;
}

voidusage()
{
printf("Usage: dnw2 <file>\n\n");
}

unsignedchar*prepare_write_buf(char*filename,unsignedint*len)
{
unsignedchar*write_buf=NULL;
structstat fs;

intfd=open(filename,O_RDONLY);
if(-1==fd)
{
perror("Cannot open file");
returnNULL;
}
if(-1==fstat(fd,&fs))
{
perror("Cannot get file size");
gotoerror;
}
write_buf=(unsignedchar*)malloc(fs.st_size+10);
if(NULL==write_buf)
{
perror("malloc failed");
gotoerror;
}

if(fs.st_size!=read(fd,write_buf+8,fs.st_size))
{
perror("Reading file failed");
gotoerror;
}

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;
returnwrite_buf;

error:
if(fd!=-1)close(fd);
if(NULL!=write_buf)free(write_buf);
fs.st_size=0;
returnNULL;

}

intmain(intargc,char*argv[])
{
if(2!=argc)
{
usage();
return1;
}

structusb_dev_handle*hdev=open_port();
if(!hdev)
{
return1;
}

unsignedintlen=0;
unsignedchar*write_buf=prepare_write_buf(argv[1],&len);
if(NULL==write_buf)return1;

unsignedintremain=len;
unsignedinttowrite;
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");
return0;
}

以上就是dnw2的源码，接下来我们进行编译。

gcc dnw2.c -o dnw2 -lusb

3、移动dnw2可执行文件到 /usr/sbin下

sudo dnw2 /usr/sbin

4、下载方式

sudo dnw2 file_name