Hi, (STM32F429, Middleware 6.2.0-6.5.0)
I have device with USB host and slave. User choose what to do and I initialize one or another. Just like that:
- user choose device: USBD_Initialize() ...work... USBD_UnInitialize()
- than user choose host: USBH_Initialize() ...work... USBH_UnInitialize()
And it's working. Problem is when user second time selects host. USBH_Initialize() returns usbOK but program cannot connect with pendrive.
I have found one solution: - I set up memory address for USB library to fixed address (for USB_CM3_L.lib) - just after program starts I save 16 first bytes of that memory - before every USBH_Initialize() I reset first 1024 bytes from that memory and restore saved 16 (don't ask me why 16; I just figured it out some time ago) And it's working. With that "patch" everything is working correctly.
To be honest - it's stupid and no one normal should do that in release application. So - what I need to do to reset library without restarting program? Is it bug in libraries or I missed something important in documentation?
If somebody has the same problem: USBH_Initialize() ... // wait for stick while(USBH_MSC_GetDeviceStatus != usbOK)... // working on data fmount ... funmount ... // WAIT FOR UNPLUGGING stick! while(USBH_MSC_GetDeviceStatus == usbOK)... USBH_UnInitialize()
Problem is when you call USBH_Uninitialize with connected stick. You have to force user to unplug it.