嵌入式學習（1）---ubuntu12.04（32位）下TQ2440開發板環境搭建

ubuntu12.04（32位）下TQ2440開發板環境搭建

Step 1.安裝arm-linux-gcc交叉編譯器

這裏我使用的是天嵌tq2440光盤下的EABI-4.3.3_EmbedSky_20100610.tar.bz2安裝包。

1、在根目錄下解壓EABI-4.3.3_EmbedSky_20100610.tar.bz2

sudo tar -xvf EABI-4.3.3_EmbedSky_20100610.tar.bz2 -C /

2、打開/etc/environment文本

sudo vi /etc/environment

並修改PATH,添加藍色字部分

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

然後在終端輸入arm-linux-gcc -v，如果出現如下信息，說明安裝成功！

Step2:安裝minicom

1、sudo apt-get install minicom安裝minicom

2、設置minicom參數

   輸入sudo minicom -s

選擇 ”Serial port setup“，並修改參數如下：

由於我們使用USB轉串口，這裏使用ttyUSB0。

然後再選擇"Save setup as dfl"，以後每次打開minicom就不用重新配置參數，

接下來介入開發班的數據先，如果出現下面的信息，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:安裝dnw2下載工具

1. 安裝libusb-dev庫

     sudo apt-get install libusb-dev

2. 編譯dnw2源碼

/* dnw2 linux main file. This depends on libusb.
 *
 * Author: Fox <[email protected]>
 * 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)
        {
            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;
}

以上就是dnw2的源碼，接下來我們進行編譯。

gcc  dnw2.c -o dnw2 -lusb

3、移動dnw2可執行文件到 /usr/sbin下

sudo dnw2 /usr/sbin

4、下載方式

sudo dnw2 file_name