47b3a226af
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@431 42af7a65-404d-4744-a932-0658087f49c3
113 lines
4.4 KiB
Plaintext
113 lines
4.4 KiB
Plaintext
NuttX TODO List
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^^^^^^^^^^^^^^^
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o Task/Scheduler
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- When a tasks exits, shouldn't all of its child pthreads also be terminated?
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- Should task_delete() cause atexit() function to be called?
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- Implement sys/mman.h and functions
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- Implement sys/wait.h and functions
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- Implement priority inheritance
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- Consider implementing wait, waitpid, waitid. At present, a parent has
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no information about child tasks.
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- Several APIs do not set errno. Need to review all APIs.
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o Memory Managment
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- Add an option to free all memory allocated by a task when the task exits.
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This is probably not be worth the overhead for a deeply embedded system.
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- Current logic adapts size_t for 16-bit address machines vs. 32-bit address
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machines. But a small memory option should also be provided so that
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the small offset option can be used with 32-bit machines that have small
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RAM memories (like the lpc2148)
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o Signals
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- 'Standard' signals and signal actions are not supported.
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o pthreads
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- pthread_cancel(): Should implement cancellation points and pthread_testcancel()
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o C++ Support
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- Need to call static constructors
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o Network
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- uIP's netutils/smtp, resolv, webclient -- untested
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- Should implement SOCK_RAW, SOCK_PACKET
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- uIP polling issues:
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(1) Current logic will not support multiple ethernet drivers. Each driver should
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poll on TCP connections connect on the network supported by the driver; UDP
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polling should respond with TX data only if the UDP packet is intended for the
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the network supported by the driver.
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(2) If there were multiple drivers, polling would occur at double the rate.i
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Fix by using bound IP address in TCP connection (lipaddr) and verifying that it
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is in the subnet served by the driver.
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- uIP/Socket callback logic is not thread safe. This means that a socket cannot be
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used concurrently by two threads. Minimal fix: Add mutex to support exclusion.
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- IPv6 support is incomplete
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- Incoming UDP broadcast should only be accepted if listening on INADDR_ANY(?)
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- Should add some driver call to support throttling... when there is no listener
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for new data, the driver should be throttled.
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o USB
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- Implement USB device support
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- Implement USB bulk device
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o Libraries
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- sscanf() and lib_vsprintf() do not support floating point values.
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- The definition of environ in stdlib.h is bogus and will not work as it should. This
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is because the underlying representation of the environment is not an arry of pointers.
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o File system
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- Add chmod(), truncate().
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- FAT32: long file names
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o Documentation
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- Document fs/ & driver/ logic
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- Document C-library APIs
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o Build system
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- Some names under arch are still incorrect. These should be processor architecture
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names: pjrc-8051 should be 805x
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- configs/pjrc-8051 should be configs/pjrc-87c52
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- Dependencies do not work correctly under configs/<board>/src (same as arch/<arch>/src/board).
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o Applications & Tests
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- Verify TELNET frontend to nsh
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o ARM
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- Add option to use a separate stack for interrupt handling. At present,
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each interrupt executes on top of the user stack allocation making each
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user stack allocation larger than needed.
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o ARM/C5471
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- Ethernet driver has problems on receive side. The cause of the problem seems
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to be that the hardware waits for about 3 seconds before interrupting the driver.
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By then, the sender has already retransmitted and things are out of sync.
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Probable cause: TX configuration problem.
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o ARM/DM320
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- It seems that when a lot of debug statements are added, the system no
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longer boots. This has been diagnosed as a stack problem.. making the stack
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bigger or removing arrays on the stack fixes the problem.
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o ARM/LPC214x
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- Finish bringup
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- Add MMC and USB support
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o pjrc-8052 / MCS51
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- Current status:
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- Basic OS task management seems OK
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- Fails when interrupts enabled. The stack pointer is around 0x6e
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before the failure occurs. It looks like some issue when the
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stack pointer moves from the directly to indirectly addressable
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region (0x80 boundary).
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- Work on the 8052 is temporarily on hold
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- Use timer 0 as system timer. Timer 2 is needed for second UART.
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Logic is implemented, but there needs to be a system configuration
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to change the ticks-per-second value to match the timer interrupt
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rate
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- During build, there are several integer overflows reported:
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gmtime_r.c aroud lines 184 and 185
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clock_initialize.c at line 107
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pthread_create.c at 330
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sighand.c at 225 and 244
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