Hi Alex, Sorry to bother you again, I didn’t get any message back since yesterday. Is there anything wrong? Thanks.
Nick > On Oct 20, 2014, at 5:16 PM, Nick Yao <[email protected]> wrote: > > Dear Alex, > > From my experiences in Windows and Linux, whenever an new device is > plugged in, we always have to install the device driver, which lives > in kernel spaces. So why does not Mac need a device driver lives in > kernel space? > > Thanks > > Nick > > On 10/20/14, Nick Yao <[email protected]> wrote: >> Dear Alex, >> >> Thanks a lot. >> Our goal is relatively simple. >> We have an IC with one USB interface and two I2C interfaces. >> Our goal is to use usb to transfer data from PC to i2c devices (maybe >> a camera or e2prom), and vice versa. >> My leader has already achieved it on Windows and Linux by writing >> corresponding OS driver. >> So he thinks it should be done in the same way by writing a device >> driver on MAC. >> and that's the reason I get the task. >> >> Have I answered your question? >> >> Nick >> >> On 10/20/14, Alexander von Below <[email protected]> wrote: >>> Hello Nick, >>> >>> in order to help you, I need to understand what your primary goal is. I >>> have >>> developed a lot of USB code, and rarely found it necessary for it to live >>> in >>> Kernel space. If your code does not need to live in Kernel space, that >>> would >>> immediately solve your issue, correct? >>> >>> Alex >>> >>> >>> Am 20.10.2014 um 09:29 schrieb Nick Yao <[email protected]>: >>> >>>> Dear Alex >>>> add subject. >>>> My leader has assigned the driver task to me. So It's kind of an order. >>>> I just want to know the interface through which upper applications >>>> talk to device driver. >>>> I cannot find these interfaces in IOKit Classes. >>>> >>>> Thanks. >>>> >>>> Nick >>>> >>>> On 10/20/14, Alexander von Below <[email protected]> wrote: >>>>> Exactly what is your goal? Why does your USB code need to live in >>>>> kernel >>>>> space in the first place? >>>>> >>>>> Alex >>>>> >>>>> Von meinem iPhone gesendet >>>>> >>>>>> Am 20.10.2014 um 09:00 schrieb Nick Yao <[email protected]>: >>>>>> >>>>>> Hello experts, >>>>>> >>>>>> I'm new to MAC development with some linux device driver >>>>>> experience, and I am working on developing an usb device driver. >>>>>> I have already read iokit fundamental, but still very confused. >>>>>> how does kext get request form upper applications？Every base >>>>>> Class in iokit have different functions. >>>>>> It gives me the expression that iokit does't expose the same >>>>>> uniform interface to upper applications. >>>>>> Is there anything like read/write file operations functions in >>>>>> Linux? >>>>>> >>>>>> >>>>>> Thanks. >>>>>> >>>>>> _______________________________________________ >>>>>> Do not post admin requests to the list. They will be ignored. >>>>>> Usb mailing list ([email protected]) >>>>>> Help/Unsubscribe/Update your Subscription: >>>>>> https://lists.apple.com/mailman/options/usb/below%40mac.com >>>>>> >>>>>> This email sent to [email protected] >>>>> >>> >>> >> _______________________________________________ Do not post admin requests to the list. They will be ignored. Usb mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/usb/archive%40mail-archive.com This email sent to [email protected]
