开发板作模拟网卡(RNDIS)与串口

来源：互联网发布：钢铁雄心4汉化mac mod 编辑：程序博客网时间：2024/05/16 08:01

首先配置内核 , 进入LINUX内核文件夹,输入命令

make menuconfig

对内核做如下配置

选择 Device Drivers -->

[*]USB support -->

<*>USB Gadget Support -->

<M>USB Gadget Drivers

....................................

<M>Ethernet Gadget (with CDC Ethernet support)

[*] RNDIS support

...................................

<M>CDC Composite Device (Ethernet and ACM)

编译内核

make uImage ARCH=arm CROSS_COMPILE=arm-linux-

配置完之后，插在windows下，没反应。原因是对应的USB_EN引脚没有置高电平，所以检测不了。

下面对内核做修改

static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_usb,
/**add to use mmc/sd**/
&s3c_device_sdi,
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c0,
&s3c_device_iis,
&s3c_device_usbgadget, /*USB gadget device设备登记*/
};

/*add to use usb*/
#include <plat/pll.h>
#include <mach/regs-clock.h>
#include <asm/delay.h>
static void gt2440_udc_pullup(enum s3c2410_udc_cmd_e cmd)
{
u8 *s3c2410_pullup_info[] = {
            " ",
            "Pull-up enable",
            "Pull-up disable",
            "UDC reset, in case of"
        };
s3c2410_gpio_cfgpin(S3C2410_GPG12,S3C2410_GPIO_OUTPUT);
printk("smdk2410_udc: %s/n",s3c2410_pullup_info[cmd]);
switch (cmd)
        {
            case S3C2410_UDC_P_ENABLE :
            s3c2410_gpio_setpin(S3C2410_GPG12, 1);   //set gpg12 output HIGH
                break;
            case S3C2410_UDC_P_DISABLE :
                s3c2410_gpio_setpin(S3C2410_GPG12, 0);   //set gpg12 output LOW
                break;
            case S3C2410_UDC_P_RESET :
                //FIXME!!!
                break;
            default:
                break;
        }
}

static struct s3c2410_udc_mach_info gt2440_udc_cfg __initdata = {
.udc_command = gt2440_udc_pullup,
};

static void __init smdk2440_map_io(void)
{
s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));

/*add*/
//s3c24xx_init_clocks(16934400);
s3c24xx_init_clocks(12000000);
s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
}

就可以了，下面在windows下就能检测

将内核模块g_serial.ko或者g_ether.ko放到文件系统里，开启后加载

insmod g_serial.ko

echo hello > /dev/ttyGS0

或者

insmod g_ether.ko