usb不能连续发送

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usb不能连续发送

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SSFG1992
Contributor I

开发环境 rt1064evk,IAR,例程:dev_cdc_vcom_bm

修改APPTask,单次调用USB_DeviceCdcAcmSend,修改为连续调用USB_DeviceCdcAcmSend若干次(比如5次),USB_DeviceCdcAcmSend函数会返回busy。如果每次调用USB_DeviceCdcAcmSend函数间隔100us延时,usb就可以正常发送。

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