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SAMV7 USBHS device: Beef up test for data sent in DMA complete interrupt handler

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This commit is contained in:
Gregory Nutt 2015-12-11 08:28:49 -06:00
parent cb5c221ce7
commit ead6656a35
1 changed files with 14 additions and 3 deletions
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17
arch/arm/src/samv7/sam_usbdevhs.c
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@ -2490,6 +2490,7 @@ static void sam_dma_interrupt(struct sam_usbdev_s *priv, int epno)
if (privep->epstate == USBHS_EPSTATE_SENDING)
{
uint32_t nbusybk;
uint32_t byct;
/* This is an IN endpoint. Continuing processing the write
@ -2501,11 +2502,21 @@ static void sam_dma_interrupt(struct sam_usbdev_s *priv, int epno)
/* Have all of the bytes in the FIFO been transmitted to the
* host?
*
* BYCT == 0 Means that all of the data has been transferred
* out of the FIFO.
* Warning: This field may be updated one clock cycle
* after the RWALL bit changes, so the user should not
* poll this field as an interrupt bit.
* NBUSYBK == 0 Indicates that all banks that have been sent to
* the host.
*/
byct = (sam_getreg(SAM_USBHS_DEVEPTISR(epno)) & USBHS_DEVEPTISR_BYCT_MASK)
>> USBHS_DEVEPTISR_BYCT_SHIFT;
if (byct > 0)
regval = sam_getreg(SAM_USBHS_DEVEPTISR(epno));
byct = (regval & USBHS_DEVEPTISR_BYCT_MASK) >> USBHS_DEVEPTISR_BYCT_SHIFT;
nbusybk = (regval & USBHS_DEVEPTISR_NBUSYBK_MASK) >> USBHS_DEVEPTISR_NBUSYBK_SHIFT;
if (byct > 0 || nbusybk > 0)
{
/* Not all of the data has been sent to the host. A TXIN
* interrupt will be generated later. Enable the TXIN