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STM32F4 slave uart DMA circular buffer

Question asked by francescato.diego on Jun 9, 2014
Latest reply on Dec 11, 2015 by Bursic.Marko
I have to write new driver for uart slave interface with a STM32F407
For RX I thought I enable DMA in circular buffer  mode.
The device is always ready to receive and with HC and TC DMA interrupt I can download the RX data from the receiver buffer.
But with message rx tail or if the length of the received message can't trigger a DMA interrupt how I can solve ?
Someone has already solved a similar situation