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Code Issues Releases Activity

usb_com: NAK rather than STALL on buffer full

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STALL should only be used to indicate an error has occurred.
NAK is the correct mechanism to provide backpressure.
This commit is contained in:
Stacey Sheldon 2011-12-26 17:09:08 -05:00
parent e2bb7140fe
commit 34af9ac92d
1 changed files with 1 additions and 1 deletions
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2
flight/PiOS/STM32F10x/pios_usb_com.c
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@ -490,7 +490,7 @@ static void PIOS_USB_COM_CDC_DATA_EP_OUT_Callback(void)
SetEPRxStatus(usb_com_dev->cfg->data_rx_ep, EP_RX_VALID); SetEPRxStatus(usb_com_dev->cfg->data_rx_ep, EP_RX_VALID);
} else { } else {
/* Not enough room left for a message, apply backpressure */ /* Not enough room left for a message, apply backpressure */
SetEPRxStatus(usb_com_dev->cfg->data_rx_ep, EP_RX_STALL); SetEPRxStatus(usb_com_dev->cfg->data_rx_ep, EP_RX_NAK);
} }
#if defined(PIOS_INCLUDE_FREERTOS) #if defined(PIOS_INCLUDE_FREERTOS)