AG903ライブラリリファレンス
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1: uhs_status_t Usbh_Api_GetDescriptor( 2: struct usb_control_block* ucb, 3: struct usbd_usb_deviceinfo* usbdev, 4: const uhs_ubit8_t type, 5: const uhs_ubit8_t index, 6: const uhs_ubit16_t wIndex, 7: void *buf, 8: const uhs_ubit32_t size 9: ) 10: { 11: uhs_status_t retval = UDI_OK; 12: 13: 14: if( Usbh_susres_get_state() != USBH_SUSRES_STS_IDLE ){ 15: uhs_debug_print (DBG_ERR, ("ERROR : Don't Call Current State!!")); 16: CORE_REPORT_ERROR( USBC_ILLEGAL_ERROR ); 17: return UDI_STAT_INVALID_STATE; 18: } 19: 20: if (( ucb == NULL ) || ( usbdev == NULL ) || ( buf == NULL )) { 21: CORE_REPORT_ERROR( USBC_INVALID_PARAMETER ); 22: return UDI_STAT_DATA_ERROR; 23: } 24: 25: 26: Usbh_Api_FixupPipeInfo( 27: &ucb->pipe, 28: ucb->usbdev->usbdev_DevNum, 29: USB_DEFAULT_EP_NUM, 30: USB_PACKETID_IN, 31: USB_TRANS_CONTROL, 32: ucb->usbdev->usbdev_EpMaxpktOut[USB_DEFAULT_EP_NUM] 33: ); 34: 35: retval = Usbh_Api_SyncControlMsg( 36: ucb, 37: USB_DEVICE_REQUEST_TYPE_DEVICE_TO_HOST | 38: USB_DEVICE_REQUEST_TYPE_STANDARD_TYPE | 39: USB_DEVICE_REQUEST_TYPE_DEVICE_RECIPIENT, 40: USB_DEVICE_REQUEST_GET_DESCRIPTOR, 41: index, 42: type, 43: wIndex & 0xffU, 44: wIndex >> 8, 45: buf, 46: size ); 47: 48: if( retval != UDI_OK) { 49: CORE_REPORT_WARNING(USBC_ILLEGAL_ERROR); 50: } 51: 52: return retval; 53: }
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