Kinetis Microcontrollers中的主题 Re: KINETIS_120MHZ_SC USBFS_device example High Speed

KINETIS_120MHZ_SC USBFS_device example High Speed

peterweatherall — Thu, 10 Apr 2014 22:10:26 GMT

Looking for information on what needs to be done to modify the KINETIS_120MHZ_SC USBFS_device example for high speed USB (480Mb/s) operation using the TWR-SER2 board. Thanks.

Re: KINETIS_120MHZ_SC USBFS_device example High Speed

Hui_Ma — Tue, 22 Apr 2014 03:02:09 GMT

Hi Peter,

Please check Kinetis USB Stack V4.1.1 from below link:

USB Stack

Customer can select K70 project and set "HIGH_SPEED_DEVICE" macro at <user_config.h> file.

#if (defined MCU_MK70F12) || (defined __MCF52277_H__)

#define HIGH_SPEED_DEVICE (1)

#else

#define HIGH_SPEED_DEVICE (0)

#endif

Wish it helps.

Best regards,
Ma Hui

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Re: KINETIS_120MHZ_SC USBFS_device example High Speed

peterweatherall — Tue, 22 Apr 2014 16:25:55 GMT

Ma, I am trying to implement a vendor specific high speed device that implements a upstream (IN) speed test over a 512 byte bulk endpoint. The basis for this was copied from the CDC device example out of USB stack 4.1.1. The non control endpoints are are initialized with ZLT = 1:

(void)_usb_device_init_endpoint(&controller_ID, ep_struct->ep_num, ep_struct->size, ep_struct->direction, ep_struct->type, 1);

The device calls USB_Class_Send_Data() with 5*4096 bytes of data when the USB_APP_ENUM_COMPLETE event is detected, and then sends another 5*4096 byte block every time the

USB_APP_SEND_COMPLETE event occurs. This is working but it appears that the host also gets a zero length packet after each 5*4096 byte block. My question is how do I disable the zero length condition after each block I am trying to simulate a continuous stream. Thanks.