Hello comrades.
I am using CubeMX to implement USB MSC host and FatFs on STM32F767. My task is to periodically write files to various flash drives. When I first insert a USB drive into my device, everything goes right: in the APPLICATION_READY state, I mount the file system (FAT32) and successfully write data to the file. After finishing writing the file, I close it (f_close), unmount the file system (f_mount (NULL, "", 1)) and disconnect the flash drive.
When I reconnect the flash drive, I repeat these steps, but when I try to write data to the file again, the program ends up in an infinite loop inside the USBH_MSC_Write() function:
while (USBH_MSC_RdWrProcess(phost, lun) == USBH_BUSY)
{
if(((phost->Timer - timeout) > (10000 * length)) || (phost->device.is_connected == 0))
{
MSC_Handle->state = MSC_IDLE;
return USBH_FAIL;
}
}
That is, always USB_BUSY. The file is created but remains empty.
The problem is not always there: sometimes rewriting is successful. This is independent of the specific flash drive. The problem can happen if I just plug and unplug the flash drive, and then try to write the file. So I don't see any logic.
Help me please. And sorry my Google-English.
