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SAMV7 EMAC: Sometimes TX is not started when TSTART is set??? Workaround seems to be to set it twice. Restored full optimization. Also CONFIG_NET_NOINTS is set so that interrupt level provessing is avoided

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This commit is contained in:
Gregory Nutt 2015-03-28 09:42:45 -06:00
parent 756d19ff28
commit d7dbdfef58
3 changed files with 16 additions and 9 deletions
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11
arch/arm/src/samv7/sam_emac.c
View File

@ -1318,7 +1318,7 @@ static int sam_transmit(struct sam_emac_s *priv, int qid)
(uintptr_t)txdesc->addr + dev->d_len);
}
/* Update TX descriptor status. */
/* Update TX descriptor status (with USED=0). */
status = dev->d_len | EMACTXD_STA_LAST;
if (txhead == priv->xfrq[qid].ntxbuffers - 1)
@ -1347,6 +1347,13 @@ static int sam_transmit(struct sam_emac_s *priv, int qid)
regval |= EMAC_NCR_TSTART;
sam_putreg(priv, SAM_EMAC_NCR_OFFSET, regval);
/* REVISIT: Sometimes TSTART is missed? In this case, the symptom is
* that the packet is not sent until the next transfer when TXSTART
* is set again.
*/
sam_putreg(priv, SAM_EMAC_NCR_OFFSET, regval);
/* Setup the TX timeout watchdog (perhaps restarting the timer) */
(void)wd_start(priv->txtimeout, SAM_TXTIMEOUT, sam_txtimeout_expiry, 1,
@ -1515,7 +1522,7 @@ static void sam_dopoll(struct sam_emac_s *priv, int qid)
static int sam_recvframe(struct sam_emac_s *priv, int qid)
{
struct emac_rxdesc_s *rxdesc;
volatile struct emac_rxdesc_s *rxdesc;
struct net_driver_s *dev;
const uint8_t *src;
uint8_t *dest;

8
configs/samv71-xult/README.txt
View File

@ -49,7 +49,7 @@ Board Features
- Embedded Debugger with Data Gateway Interface and Virtual COM port (CDC)
- External power input (5-14V) or USB powered
See the Atmel webite for further information about this board:
See the Atmel website for further information about this board:
- http://www.atmel.com/tools/atsamv71-xult.aspx
@ -475,6 +475,7 @@ Selecting the GMAC peripheral
Networking Support
CONFIG_NET=y : Enable Neworking
CONFIG_NET_NOINTS=y : Use the work queue, not interrupts for processing
CONFIG_NET_SOCKOPTS=y : Enable socket operations
CONFIG_NET_ETH_MTU=562 : Maximum packet size (MTU) 1518 is more standard
CONFIG_NET_ETH_TCP_RECVWNDO=562 : Should be the same as CONFIG_NET_ETH_MTU
@ -801,7 +802,7 @@ Configuration sub-directories
long, perhaps minutes, if the network cable is not connected!
If fast boot times are required, you need to perform asynchronous
network initializatino as described about under "Network Initialization
network initialization as described about under "Network Initialization
Thread"
5. SDRAM is NOT enabled in this configuration.
@ -824,7 +825,7 @@ Configuration sub-directories
7. TWIHS0 is used to support 256 byte non-volatile storage. This EEPROM
holds the assigned MAC address which is necessary for networking. The
EEPROM is also avaiable for storage of configuration data using the
EEPROM is also available for storage of configuration data using the
MTD configuration as described above under the heading, "MTD
Configuration Data".
@ -1048,4 +1049,3 @@ Configuration sub-directories
Stack sizes are also large to simplify the bring-up and should be
tuned for better memory usages.

6
configs/samv71-xult/netnsh/defconfig
View File

@ -51,9 +51,9 @@ CONFIG_ARCH_HAVE_STACKCHECK=y
# CONFIG_STACK_COLORATION is not set
# CONFIG_DEBUG_SYMBOLS is not set
CONFIG_ARCH_HAVE_CUSTOMOPT=y
CONFIG_DEBUG_NOOPT=y
# CONFIG_DEBUG_NOOPT is not set
# CONFIG_DEBUG_CUSTOMOPT is not set
# CONFIG_DEBUG_FULLOPT is not set
CONFIG_DEBUG_FULLOPT=y
#
# System Type
@ -647,7 +647,7 @@ CONFIG_UART3_2STOP=0
CONFIG_ARCH_HAVE_NET=y
CONFIG_ARCH_HAVE_PHY=y
CONFIG_NET=y
# CONFIG_NET_NOINTS is not set
CONFIG_NET_NOINTS=y
# CONFIG_NET_PROMISCUOUS is not set
#