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Regarding USB communication Between Host and Device Using Stm32h745xi

srikanth
Associate III

Hai,

We have 2 MCUS in one board ,one act as Host and Other one as Device. when we are trying to make 1 MCU as Device and pc as host it works fine but when are trying to make one MCU as Host and Other MCU as Device Data transmission is not happening and we are getting at host side as application Ready and At device side we are getting busy error when we are transmitting . When we are trying to send the data from the host to the device through this function USBH_CDC_Transmit(&hUsbHostFS,(uint8_t*)"usbdata",7); we are using above function for the transmission this function is returning status as OK . for this what may be the issue please suggest us what may be the issue . We are using the FW_H7_V1.7.0 and FW_H7_V1.8.0 we faced the issue with both the firmware's. .

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