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Release Notes for StellarisWare Revision 5879 (April 14, 2010)

12.5 New Features in EK-LM3S6965 Firmware Package

12.5.1 boot_demo_eth example application added. (Reference 11910)

The boot_demo_eth example application, illustrating the use of the swupdate module, has been

added to ek-lm3s9b96 and ek-lm3s6965 releases of StellarisWare. The swupdate module is used

in conjunction with the Ethernet boot loader to signal to the application when a ﬁrmware update

request is received from LMFlash.

12.6 Bug Fixes in EK-LM3S6965 Firmware Package

12.6.1 Shorten time to select link-local address in lwIP applications (Refer-

ence 11908)

In lwIP 1.3.1, the time delay between DHCP discover messages was changed from a linear delay

to an exponential delay (to conform with the relevant standards). This results in a longer amount of

time (around 4 minutes) before a link-local address is chosen instead of a DHCP-assigned address

since this occurs after a set number of DHCP discover messages. Therefore, the lwipopts.h for

each lwIP application now sets LWIP_DHCP_AUTOIP_COOP_TRIES to 5 (instead of its default 9)

so that the link local address is chosen after around 40 seconds.

12.6.2 HTTP/SSI Performance Improvement (Reference 11935)

A misplaced “return” instruction inside the SSI handling state machine of the lwIP HTTP server

caused each SSI insert to be returned to the client in a single TCP packet, reducing performance.

Removing this allows the server to buffer up as many SSI inserts as can be handled in the available

TCP send buffer before sending them as a single packet, thus improving performance when serving

pages containing many SSI tags.

12.7 Bug Fixes in EK-LM3S8962 Firmware Package

12.7.1 Shorten time to select link-local address in lwIP applications (Refer-

ence 11908)

In lwIP 1.3.1, the time delay between DHCP discover messages was changed from a linear delay

to an exponential delay (to conform with the relevant standards). This results in a longer amount of

time (around 4 minutes) before a link-local address is chosen instead of a DHCP-assigned address

since this occurs after a set number of DHCP discover messages. Therefore, the lwipopts.h for

each lwIP application now sets LWIP_DHCP_AUTOIP_COOP_TRIES to 5 (instead of its default 9)

so that the link local address is chosen after around 40 seconds.

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