X2000 freeRTOS usb

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_BULKextern 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。