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to save the preserved space(1KB) and also avoid the heap overhead Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: I694073f68e1bd63960cedeea1ddec441437be025 |
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README.txt |
README ====== This is the README file for a port of NuttX to the TM4C1294 Connected Launchpad (more correctly, the EK-TM4C1294XL). For more information about this board, see http://www.ti.com/tool/ek-tm4c1294xl DK-TM4C129X =========== This board configuration derives from the DK-T4C129X. Refer to the README file at nuttx/boards/dk-tm4c129x for additional information that may be relevant to this board as well. Serial Console ============== These configurations use UART0 for the serial console. UART0 is connected to the on-board TM4C123G-based debugger and is forwarded through the ICDI virtual UART. Configurations ============== Each EK-TM4C1294XL configuration is maintained in a sub-directory and can be selected as follow: tools/configure.sh tm4c1294-launchpad:<subdir> Where <subdir> is one of the following: nsh: --- Configures the NuttShell (nsh) located at apps/examples/nsh. The configuration enables the serial ICDI virtual UART on UART0. Support for builtin applications is enabled, but in the base configuration no builtin applications are selected. NOTES: 1. This configuration uses the mconf-based configuration tool. To change this configuration using that tool, you should: a. Build and install the kconfig-mconf tool. See nuttx/README.txt see additional README.txt files in the NuttX tools repository. b. Execute 'make menuconfig' in nuttx/ in order to start the reconfiguration process. 2. By default, this configuration uses the ARM EABI toolchain for Windows and builds under Cygwin (or probably MSYS). That can easily be reconfigured, of course. CONFIG_HOST_LINUX=y : Linux (Cygwin under Windows okay too). CONFIG_ARMV7M_TOOLCHAIN_BUILDROOT=y : Buildroot (arm-nuttx-elf-gcc) CONFIG_RAW_BINARY=y : Output formats: ELF and raw binary 3. Default stack sizes are large and should really be tuned to reduce the RAM footprint: CONFIG_SCHED_HPWORKSTACKSIZE=2048 CONFIG_IDLETHREAD_STACKSIZE=1024 CONFIG_USERMAIN_STACKSIZE=2048 CONFIG_PTHREAD_STACK_DEFAULT=2048 CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024 CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=2048 CONFIG_NSH_TELNETD_DAEMONSTACKSIZE=2048 CONFIG_NSH_TELNETD_CLIENTSTACKSIZE=2048 4. This configuration has the network enabled by default. See the paragraph "Using the network with NSH" in the DK-TM4C129X README). Networking can easily be disabled or reconfigured (See see the network related configuration settings in the section entitled "Networking" in the DK-TM4C129X README). By default, this configuration assumes a 10.0.0.xx network. It uses a fixed IP address of 10.0.0.2 and assumes that the host is at 10.0.0.1 and that the host provides the default router. The network mask is 255.255.255.0. These address can be changed by modifying the settings in the configuration. DHCPC can be enabled be modifying this default configuration (See the "Networking" section in the DK-TM4C129X README). The network initialization thread is enabled in this example. NSH will create a separate thread when it starts to initialize the network. This eliminates start-up delays to bring the network. This feature may be disabled by reverting the configuration as described under "Network Initialization Thread" in the DK-TM4C129X README. The persistent network monitor thread is also available in this configuration. The network monitor will monitor changes in the link status and gracefully take the network down when the link is lost (for example, if the cable is disconnected) and bring the network back up when the link becomes available again (for example, if the cable is reconnected). See the paragraph "Network Monitor" in the DK-TM4C129X README for additional information. ipv6: ---- This is another version of the NuttShell configuration. It is very similar to the nsh configuration except that it has IPv6 enabled and IPv4 disabled. Several network utilities that are not yet available under IPv6 are disabled. NOTES: 1. As of 2015-02-12, this configuration was identical to the nsh configuration other than using IPv6. So all of the notes above regarding the nsh configuration apply. Telnet does work with IPv6 but is not enabled in this configuration (but could be). 2. This configuration can be modified so that both IPv4 and IPv6 are supported. Here is a summary of the additional configuration settings required to support both IPv4 and IPv6: CONFIG_NET_IPv4=y CONFIG_NET_ARP=y CONFIG_NET_ARP_SEND=y (optional) CONFIG_NET_ICMP=y CONFIG_NET_ICMP_SOCKET=y CONFIG_NETDB_DNSCLIENT=y CONFIG_NETUTILS_TELNETD=y CONFIG_NSH_IPADDR=0x0a000002 CONFIG_NSH_DRIPADDR=0x0a000001 CONFIG_NSH_NETMASK=0xffffff00 CONFIG_NSH_TELNET=y Then from NSH, you have both ping and ping6 commands: nsh> ping 10.0.0.1 nsh> ping6 fc00::1 And from the host you can do similar: ping 10.0.0.2 ping6 fc00::2 (Linux) ping -6 fc00::2 (Windows cmd) and Telnet is now enabled and works from the host... but only using IPv6 addressing: telnet fc00::2 That is because the Telnet daemon will default to IPv6 and there is no Telnet option to let you select which if both IPv4 and IPv6 are enabled. 3. You can enable IPv6 autonomous address configuration with the following changes to the configuration: + CONFIG_NET_ICMPv6_AUTOCONF=y + CONFIG_ICMPv6_AUTOCONF_DELAYMSEC=100 + CONFIG_ICMPv6_AUTOCONF_MAXTRIES=5 - CONFIG_NSH_DRIPv6ADDR_1=0xfc00 - CONFIG_NSH_DRIPv6ADDR_2=0x0000 - CONFIG_NSH_DRIPv6ADDR_3=0x0000 - CONFIG_NSH_DRIPv6ADDR_4=0x0000 - CONFIG_NSH_DRIPv6ADDR_5=0x0000 - CONFIG_NSH_DRIPv6ADDR_6=0x0000 - CONFIG_NSH_DRIPv6ADDR_7=0x0000 - CONFIG_NSH_DRIPv6ADDR_8=0x0001 - CONFIG_NSH_IPv6ADDR_1=0xfc00 - CONFIG_NSH_IPv6ADDR_2=0x0000 - CONFIG_NSH_IPv6ADDR_3=0x0000 - CONFIG_NSH_IPv6ADDR_4=0x0000 - CONFIG_NSH_IPv6ADDR_5=0x0000 - CONFIG_NSH_IPv6ADDR_6=0x0000 - CONFIG_NSH_IPv6ADDR_7=0x0000 - CONFIG_NSH_IPv6ADDR_8=0x0002 - CONFIG_NSH_IPv6NETMASK_1=0xffff - CONFIG_NSH_IPv6NETMASK_2=0xffff - CONFIG_NSH_IPv6NETMASK_3=0xffff - CONFIG_NSH_IPv6NETMASK_4=0xffff - CONFIG_NSH_IPv6NETMASK_5=0xffff - CONFIG_NSH_IPv6NETMASK_6=0xffff - CONFIG_NSH_IPv6NETMASK_7=0xffff - CONFIG_NSH_IPv6NETMASK_8=0xff80