X2000 freeRTOS usb

X2000 freeRTOS usb_bulk通信

例程

官方例程..\freertos\example\usb\device\gadget_generic_bulk.c，代码如下：

#include <common.h>
#include <usb/gadget_bulk.h>
#include <os.h>

static const struct gadget_id bulk_id = {
    .vendor_id = 0x1CBE,
    .product_id = 0x0003
};

static void bulk_connect_callback(int connect)
{
    printf("generic_bulk_connect_callback %d\n", connect);
}

static unsigned char usb_test_buf[1024];
static const char *usb_test_char = "hello world!\r\n";
static void usb_gadget_bulk_thread(void *data)
{
    int len, i;

    while (1) {
        msleep(1000);
        gadget_bulk_write((const unsigned char *)usb_test_char, strlen(usb_test_char), 1, THREAD_COND_TIMEOUT_NO_LIMIT_MS);
        len = gadget_bulk_read(usb_test_buf, sizeof(usb_test_buf), 0, 0);
        if (len > 0) {
            for(i = 0; i < len; i++)
                printf("usb bulk read data %d\n", usb_test_buf[i]);
        }

    }
}

int gadget_usb_bulk_test(void)
{
    gadget_bulk_init(&bulk_id, bulk_connect_callback);
    thread_create("usb gadget bulk thread", 4096, usb_gadget_bulk_thread, NULL);
    return 0;
}

只能修改vendor_id和product_id，描述的内容是固定的，如需修改描述符等信息，需要..\freertos\drivers\usb\gadget\generic_bulk\generic_bulk.c文件，代码如下：

#include <common.h>
#include <os.h>
#include <usb/gadget_bulk.h>

#include "../composite.h"

#define DRIVER_DESC        "Generic Bulk Device"

extern struct usb_function *generic_bulk_device_alloc(connect_callback_t connect_cb);
extern void generic_bulk_device_free(void);

/*-------------------------------------------------------------------------*/

/*
 * DESCRIPTORS ... most are static, but strings and (full) configuration
 * descriptors are built on demand.
 */

static struct usb_device_descriptor device_desc = {
    .bLength =        sizeof device_desc,
    .bDescriptorType =    USB_DT_DEVICE,
    /* .bcdUSB = DYNAMIC */
    .bDeviceClass =        USB_CLASS_VENDOR_SPEC,
    .bDeviceSubClass =    0,
    .bDeviceProtocol =    0,
    /* .idVendor = DYNAMIC */
    /* .idProduct = DYNAMIC */
    .bNumConfigurations =    1
};

/*-------------------------------------------------------------------------*/

/* static strings, in UTF-8 */
static struct usb_string        strings [] = {
    [USB_GADGET_MANUFACTURER_IDX].s = "INGENIC",
    [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
    [USB_GADGET_SERIAL_IDX].s = "ingenic",
    {  }        /* end of list */
};

static struct usb_gadget_strings    stringtab_dev = {
    .language    = 0x0409,    /* en-us */
    .strings    = strings,
};

static struct usb_gadget_strings *dev_strings[] = {
    &stringtab_dev,
    NULL,
};

static struct usb_configuration generic_bulk_cfg_driver = {
    .label            = DRIVER_DESC,
    .bConfigurationValue    = 1,
};

static connect_callback_t bulk_connect_cb;

static int generic_bulk_do_config(struct usb_configuration *c)
{
    static struct usb_function *f_bulk;
    int            status = 0;

    f_bulk = generic_bulk_device_alloc(bulk_connect_cb);
    if (IS_ERR(f_bulk))
        return PTR_ERR(f_bulk);

    status = usb_add_function(c, f_bulk);
    if (status < 0)
        generic_bulk_device_free();

    return status;
}

static int generic_bulk_bind(struct usb_composite_dev *cdev)
{
    int ret;

    ret = usb_string_ids_tab(cdev, strings);
    if (ret < 0)
        return ret;

    device_desc.iManufacturer = strings[USB_GADGET_MANUFACTURER_IDX].id;
    device_desc.iProduct = strings[USB_GADGET_PRODUCT_IDX].id;
    device_desc.iSerialNumber = strings[USB_GADGET_SERIAL_IDX].id;

    ret = usb_add_config(cdev, &generic_bulk_cfg_driver, generic_bulk_do_config);

    return ret;
}

static int generic_bulk_unbind(struct usb_composite_dev *cdev)
{
    generic_bulk_device_free();

    return 0;
}

static struct usb_composite_driver generic_bulk_driver = {
    .name           = "generic_bulk",
    .dev            = &device_desc,
    .strings        = dev_strings,
    .max_speed      = USB_SPEED_HIGH,
    .bind        = generic_bulk_bind,
    .unbind        = generic_bulk_unbind,
};

int gadget_bulk_init(const struct gadget_id *id, connect_callback_t connect_cb)
{
    int ret;

    if (id == NULL)
        panic("gadget_generic_bulk_init param id is NULL! \n");

    device_desc.idVendor = id->vendor_id;
    device_desc.idProduct = id ->product_id;
    bulk_connect_cb = connect_cb;
    ret = usb_composite_probe(&generic_bulk_driver);

    return ret;
}

void gadget_bulk_cleanup(void)
{
    usb_composite_unregister(&generic_bulk_driver);
}

驱动的头文件为..\freertos\include\usb\gadget_bulk.h，内容如下：

#ifndef _GADGET_BULK_H_
#define _GADGET_BULK_H_

#include "gadget_common.h"

#ifdef CONFIG_USB_GADGET_BULK

extern int gadget_bulk_init(const struct gadget_id *id, connect_callback_t connect_cb);
extern void gadget_bulk_cleanup(void);

extern int gadget_bulk_read(uint8_t *buffer, uint32_t len, uint8_t block, uint32_t timeout_ms);
extern int gadget_bulk_write(const uint8_t *buffer, uint32_t len, uint8_t block, uint32_t timeout_ms);
extern int gadget_bulk_flush_data(uint32_t timeout_ms)
;
extern int gadget_bulk_get_connect_status(void);
extern int gadget_bulk_wait_connect(uint32_t timeout_ms);
#endif

#endif /* _GADGET_BULK_H_ */

需要定义CONFIG_USB_GADGET_BULK宏才能使用驱动函数。