Kinetis Microcontrollers中的主题 Re: MK22FN256VLH12 USB

MK22FN256VLH12 USB

sjimtey — Wed, 19 Jul 2017 08:30:26 GMT

Hello, I'm using the MK22 USB to be a HID generic device( to output huge ADC datas to PC) , I find the demo code is running at its KHCI mode in the Demo code, I search the KHCI in internet but fail to find much message about KHCI, could you just tell me the different between KHCI and EHCI ?

if I want to run the device on its high speed(480Mbps) , I just set the macro USB_DEVICE_CONFIG_EHCI to 1U and set the USB_DEVICE_CONFIG_KHCI to 0U, am I right ?

if I want to run the device on its full speed(12Mbps), the demo code would be OK?

thanks

Re: MK22FN256VLH12 USB

sjimtey — Thu, 20 Jul 2017 01:57:27 GMT

My total data is about 96KB/s

Re: MK22FN256VLH12 USB

jorge_a_vazquez — Wed, 26 Jul 2017 01:14:52 GMT

Hi sjim tey

About your question:

if I want to run the device on its high speed(480Mbps) , I just set the macro USB_DEVICE_CONFIG_EHCI to 1U and set the USB_DEVICE_CONFIG_KHCI to 0U, am I right ?

Yes, USB_DEVICE_CONFIG_KHCI is the macro that will use drivers for full speed, meanwhile EHCI will use High speed drivers. You can find some USB documentation in the path <SDK_2.2_MK22F>\docs\usb.

Hope this helps

Best Regards

Jorge Alcala

Re: MK22FN256VLH12 USB

sjimtey — Fri, 28 Jul 2017 07:40:03 GMT

Hello Jorge Alcala

Thks for your answer;

But I'm fail to combile the code because when I change the Macro USB_DEVICE_CONFIG_EHCI to 1U and USB_DEVICE_CONFIG_KHCI to 0U, Kinetis told that fial to find the files such as "usb_device_ehci.h";

In fact I can find "usb_device_khci.h" easily because it's in the file path '"...\SDK_2.2_MK22FN256xxx12\middleware\usb_1.6.3\device"

is the reason kinetis cannot find "usb_device_ehci.h" that I down load the wrong SDK?

my SDK is down load from NXP and the version is V2.2, is it OK ?

thanks again