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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-05-28 21:42:18 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-05-28 21:42:18 +0000 |
commit | 94c7babe23d72a1e379da0cf0aab32fcf9fadcf3 (patch) | |
tree | eedc930a4ed4a1108c87cae26d3fcda7e411dd1f /nuttx/Documentation | |
parent | 405c2b328ff4cd571bb9e464541b4d297b18f93d (diff) | |
download | px4-nuttx-94c7babe23d72a1e379da0cf0aab32fcf9fadcf3.tar.gz px4-nuttx-94c7babe23d72a1e379da0cf0aab32fcf9fadcf3.tar.bz2 px4-nuttx-94c7babe23d72a1e379da0cf0aab32fcf9fadcf3.zip |
atexit() functions now called when task killed by task delete; For MCUs with <= 64Kb of SRAM, CONFIG_MM_SMALL can be defined to reduce the memory allocation overhead
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3648 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/Documentation')
-rw-r--r-- | nuttx/Documentation/NuttX.html | 22 | ||||
-rw-r--r-- | nuttx/Documentation/NuttxPortingGuide.html | 13 |
2 files changed, 31 insertions, 4 deletions
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html index b29bf7ab0..84548e10d 100644 --- a/nuttx/Documentation/NuttX.html +++ b/nuttx/Documentation/NuttX.html @@ -8,7 +8,7 @@ <tr align="center" bgcolor="#e4e4e4"> <td> <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1> - <p>Last Updated: May 25, 2011</p> + <p>Last Updated: May 28, 2011</p> </td> </tr> </table> @@ -2313,8 +2313,24 @@ nuttx-6.4 2011-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr> the MPLAB debugger on PIC32; I will need to get a PICkit 3). * drivers/net/e1000.c/h: A PCI-based E1000 ethernet driver submitted by Yu Qiang. - * lib/net/lib_inetaddr.c: An implementatino of the inet_addr() function - submitted y Yu Qiang. + * lib/net/lib_inetaddr.c: An implementation of the inet_addr() function + submitted by Yu Qiang. + * arch/arm/src/lpc31xx and arch/arm/include/lpc31xx: Renamed from lpc313x + to make name space for other famiy members. + * arch/arm/*/lpc31xx: Added support for the LPC315x family (untested). + * sched/task_exithook.c: Functionality performed when a task exits or is + deleted has been moved to a common file task_exithook.c. Now exit() + functionality (like flushing I/O and calling registered atexit() + functions, etc.) will be performed when a task is deleted as well. + * mm/: Added support for CONFIG_MM_SMALL. Each memory allocation has a + small allocation overhead. The size of that overhead is normally + determined by the "width" of the address support by the MCU. MCUs + that support 16-bit addressability have smaller overhead than devices + that support 32-bit addressability. However, there are many MCUs + that support 32-bit addressability *but* have internal SRAM of size + less than or equal to 64Kb. In this case, CONFIG_MM_SMALL can be + defined so that those MCUs will also benefit from the smaller, 16- + bit-based allocation overhead. apps-6.4 2011-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr> diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html index fb06f794e..faa9f32cf 100644 --- a/nuttx/Documentation/NuttxPortingGuide.html +++ b/nuttx/Documentation/NuttxPortingGuide.html @@ -12,7 +12,7 @@ <h1><big><font color="#3c34ec"> <i>NuttX RTOS Porting Guide</i> </font></big></h1> - <p>Last Updated: May 25, 2011</p> + <p>Last Updated: May 28, 2011</p> </td> </tr> </table> @@ -3263,6 +3263,17 @@ build handle and enables the API mm_addregion(start, end); </li> <li> + <code>CONFIG_MM_SMALL</code>: Each memory allocation has a small allocation + overhead. The size of that overhead is normally determined by + the "width" of the address support by the MCU. MCUs that support + 16-bit addressability have smaller overhead than devices that + support 32-bit addressability. However, there are many MCUs + that support 32-bit addressability <i>but</i> have internal SRAM + of size less than or equal to 64Kb. In this case, CONFIG_MM_SMALL + can be defined so that those MCUs will also benefit from the + smaller, 16-bit-based allocation overhead. + </li> + <li> <code>CONFIG_MSEC_PER_TICK</code>: The default system timer is 100Hz or <code>MSEC_PER_TICK</code>=10. This setting may be defined to inform NuttX that the processor hardware is providing system timer interrupts at some interrupt |