[DeviceDriver][Serial] Fix serial open flag lost when device reopen.

协议栈增加允许class在windows环境下枚举时向系统注册附加属性。并在winusb class中提供范例（注册GUID信息）

Core]修复了协议栈在ep0请求大于端点描述最大包时无法正确读取的bug
增加了rndis class LWIP on USB

Windows下没驱动 linux和mac下免驱

Fix compile error when RT_USING_POSIX_TERMIOS is not define.

1.Fix poll rx issue when data is full.
2.Add TCFLSH and FIONREAD support.

[Mod] Modify wifi_usage help message

There is a memory leak issue when close a pipe.

[Add] Change network_mode value according to the finsh shell command

data bits should get from CSIZE.

[wlan cmd][lwip ip addr] modify

[DeviceDrivers]添加pin开漏和下拉输入宏

[DeviceDrivers]添加pin开漏和下拉输入宏

This reverts commit cfa87cf938.

[drv][mmcsd] Undo Changes.

增加了pin设备的模式开漏和下拉
添加的HAL库的bsp分支

[drv][mmcsd] Add component initial.

1. Add macro check in rtdebug.h;
2. Use RT_USING_POSIX for poll/select, stdin etc.
3. Split dfs_posix.h to dfs_posix.h, dfs_poll.h and dfs_select.h;

1. Change 'rt_uint8_t' type of cmd to 'int';
2. Add waitqueue;
3. Split device ipc header files;

[Device Drivers] delete an useless %s.

[BSP] stm32f10x add watchdog driver

[DeviceDrivers] Add audio driver.

Fix a bug in function sdio_unregister_driver

[DeviceDrivers] pin: add irq APIs.

修复I2C读写函数，I2C传输失败时返回成功的问题

uart configure shall not been performed if uart is not open.

Improve serial DMA rx mode. #628

patched by FH.

Add MMC/SD change support, which patched by FH.

function `rt_pin_write` is invoked by  function `can_bus_hook`, and it should to be initialized by gpio.c.
but gpio.c was not added in SConscript

fix reset serial receive interrupt flag when close serial

[DeviceDrivers] Add hardware timer framework

add w25q80 support to spi flash

Remove dataqueue/pipe if not enable RT_USING_HEAP, supply the missing `not`.

fix: completion wait after, maybe can't clean the flag.

[BSP] Correct pin register name problems

[Driver/ringbuffer]: Fix put_force bug

OXape reports: http://www.rt-thread.org/phpBB3/topic3939.html
          driver/ringbuffer: when data length is bigger than space length
          for rb, the read_index in rb is not update.
    When length > space, update the read_index, the bug can be fix, and
          works fine.

2. Fix data transfer size calculate error issue;

2.adjust some viable and micro name
3.some other small fix

This reverts commit 5aeedc4f3a, reversing
changes made to 3d80e414ff.

This merge breaks every uart driver in all BSPs. @bright-pan , is there
any way to get this done without breaking existing code?

Add hardware flow support.
Use new struct serial_ringbuffer.

Pass USB CV test verification;
Code cleanup;

This reverts commit 07bd09fc0f.
The validation of the context is done with in `rt_set_errno`. So it's
safe to call it here.

The errno is associated with threads. It will crash the thread if we set
it in interrupt context.

Return early if the size is 0 as there is nothing to do.