diff --git a/TODO b/TODO index 0b2ee9d9b3..34e130dee1 100644 --- a/TODO +++ b/TODO @@ -16,11 +16,11 @@ nuttx/ (16) Network (net/, drivers/net) (2) USB (drivers/usbdev, drivers/usbhost) (7) Libraries (lib/) - (11) File system/Generic drivers (fs/, drivers/) - (2) Graphics subystem (graphics/) + (10) File system/Generic drivers (fs/, drivers/) + (1) Graphics subystem (graphics/) (1) Pascal add-on (pcode/) (1) Documentation (Documentation/) - (5) Build system / Toolchains + (7) Build system / Toolchains (6) Linux/Cywgin simulation (arch/sim) (4) ARM (arch/arm/) (1) ARM/C5471 (arch/arm/src/c5471/) @@ -30,15 +30,15 @@ nuttx/ (7) ARM/LPC214x (arch/arm/src/lpc214x/) (2) ARM/LPC313x (arch/arm/src/lpc313x/) (3) ARM/STR71x (arch/arm/src/str71x/) - (4) ARM/LM3S6918 (arch/arm/src/lm3s/) + (3) ARM/LM3S6918 (arch/arm/src/lm3s/) (4) ARM/STM32 (arch/arm/src/stm32/) (3) AVR (arch/avr) (0) Intel x86 (arch/x86) (4) 8051 / MCS51 (arch/8051/) (1) MIPS (arch/mips) - (2) Hitachi/Renesas SH-1 (arch/sh/src/sh1) + (1) Hitachi/Renesas SH-1 (arch/sh/src/sh1) (4) Renesas M16C/26 (arch/sh/src/m16c) - (8) z80/z8/ez80 (arch/z80/) + (10) z80/z8/ez80 (arch/z80/) (8) z16 (arch/z16/) (1) mc68hc1x (arch/hc) @@ -51,11 +51,13 @@ apps/ o Task/Scheduler (sched/) ^^^^^^^^^^^^^^^^^^^^^^^ + Title: CHILD PTHREAD TERMINATION Description: When a tasks exits, shouldn't all of its child pthreads also be terminated? Status: Open Priority: Medium, required for good emulation of process/pthread model. + Title: MULTIPLE ATEXIT() FUNCTIONS Description: atexit() supports registration of only single function called on exit(). It should support multiple functions registered by atexit() or onexit() and these should be called in reverse order of @@ -63,10 +65,12 @@ o Task/Scheduler (sched/) Status: Open Priority: Low + Title: MMAN.H Description: Implement sys/mman.h and functions Status: Open Priority: Low + Title: WAIT.H Description: Implement sys/wait.h and functions. Consider implementing wait, waitpid, waitid. At present, a parent has no information about child tasks. @@ -77,6 +81,7 @@ o Task/Scheduler (sched/) Status: Open Priority: Low + Title: MISSING ERRNO SETTINGS Description: Several APIs do not set errno. Need to review all APIs. Status: Open Priority: Medium, required for standard compliance (but makes the @@ -85,6 +90,7 @@ o Task/Scheduler (sched/) o On-demand paging (sched/) ^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: ON-DEMAND PAGE INCOMPLETE Description: On-demand paging has recently been incorporated into the RTOS. The design of this feature is described here: http://www.nuttx.org/NuttXDemandPaging.html. @@ -100,6 +106,7 @@ o On-demand paging (sched/) o Other core OS logic ^^^^^^^^^^^^^^^^^^^ + Title: GET_ENVIRON_PTR() Description: get_environ_ptr() (sched/sched_getenvironptr.c) is not implemented. The representation of the the environment strings selected for NutX is not compatible with the operation. Some significant @@ -108,6 +115,7 @@ o Other core OS logic Status: Open Priority: Low -- There is no plan to implement this. + Title: TIMER_GETOVERRUN() Description: timer_getoverrun() (sched/timer_getoverrun.c) is not implemented. Status: Open Priority: Low -- There is no plan to implement this. @@ -115,6 +123,7 @@ o Other core OS logic o Memory Managment (mm/) ^^^^^^^^^^^^^^^^^^^^^^ + Title: FREE MEMORY ON TASK EXIT Description: Add an option to free all memory allocated by a task when the task exits. This is probably not be worth the overhead for a deeply embedded system. @@ -129,12 +138,14 @@ o Memory Managment (mm/) o Signals (sched/, arch/) ^^^^^^^^^^^^^^^^^^^^^^^ + Title: STANDARD SIGNALS Description: 'Standard' signals and signal actions are not supported. (e.g., SIGINT, SIGCHLD, SIGSEGV, etc). Status: Open Priority: Low, required by standards but not so critical for an embedded system. + Title: SIGEV_THREAD Description: sig_notify() logic does not support SIGEV_THREAD; structure struct sigevent does not provide required members sigev_notify_function or sigev_notify_attributes. @@ -145,6 +156,7 @@ o Signals (sched/, arch/) o pthreads (sched/) ^^^^^^^^^^^^^^^^^ + Title: CANCELLATION POINTS Description: pthread_cancel(): Should implement cancellation points and pthread_testcancel() Status: Open @@ -153,6 +165,7 @@ o pthreads (sched/) o C++ Support ^^^^^^^^^^^ + Title: USE OF SIZE_T IN NEW OPERATOR Description: The argument of the 'new' operators should take a type of size_t (see libxx/libxx_new.cxx and libxx/libxx_newa.cxx). But size_t has an unknown underlying. In the nuttx sys/types.h @@ -168,6 +181,7 @@ o C++ Support would be to get ahold of the compilers definition of size_t. Priority: Low. + Title: STATIC CONSTRUCTORS Description: Need to call static constructors Status: Open Priority: Low, depends on toolchain. Call to gcc's built-in static @@ -177,23 +191,27 @@ o C++ Support o Binary loaders (binfmt/) ^^^^^^^^^^^^^^^^^^^^^^^^ + Title: NXFLAT TESTS Description: Not all of the NXFLAT test under apps/examples/nxflat are working. Most simply do not compile yet. tests/mutex runs okay but outputs garbage on completion. Status: Open Priority: High + Title: ARM UP_GETPICBASE() Description: The ARM up_getpicbase() does not seem to work. This means the some features like wdog's might not work in NXFLAT modules. Status: Open Priority: Medium-High + Title: READ-ONLY DATA IN RAM Description: At present, all .rodata must be put into RAM. There is a tentative design change that might allow .rodata to be placed in FLASH (see Documentation/NuttXNxFlat.html). Status: Open Priority: Medium + Title: GOT-RELATIVE FUNCTION POINTERS Description: If the function pointer to a statically defined function is taken, then GCC generates a relocation that cannot be handled by NXFLAT. There is a solution described in Documentataion/NuttXNxFlat.html, @@ -202,17 +220,18 @@ o Binary loaders (binfmt/) Status: Open Priority: Low (probably will not fix) + Title: USE A HASH INSTEAD OF A STRING IN SYMBOL TABLES Description: In the NXFLAT symbol tables... Using a 32-bit hash value instead of a string to identify a symbol should result in a smaller footprint. Status: Open Priority: Low + Title: WINDOWS-BASED TOOLCHAIN BUILD Description: Windows build issue. Some of the configurations that use NXFLAT have the linker script specified like this: NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat.ld -no-check-sections - That will not work for windows-based tools because they require Windows style paths. The solution is to do something like this: @@ -225,7 +244,7 @@ o Binary loaders (binfmt/) Then use NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T"$(NXFLATLDSCRIPT)" -no-check-sections - + Status: Open Priority: There are too many references like the above. They will have to get fixed as needed for Windows native tool builds. @@ -233,10 +252,12 @@ o Binary loaders (binfmt/) o Network (net/, drivers/net) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: SOCK_RAW/SOCK_PACKET Description: Should implement SOCK_RAW, SOCK_PACKET Status: Open Priority: Low + Tile: MULTIPLE NETWORK INTERFACE SUPPORT Description: uIP polling issues / Multiple network interface support: (1) Current logic will not support multiple ethernet drivers. Each driver should poll on TCP connections connect on the @@ -251,6 +272,7 @@ o Network (net/, drivers/net) Priority: Medium, The feature is not important, but it is important for NuttX to resolve the architectural issues. + Title: SENTDO() AND MULTIPLE NETWORK INTERFACE SUPPORT Description: sendto() and multiple network interface support: When polled, would have to assure that the destination IP is on the subnet served by the polling driver. @@ -258,17 +280,20 @@ o Network (net/, drivers/net) Priority: Medium, The feature is not important, but it is important for NuttX to resolve the architectural issues. + Title: IPv6 Description: IPv6 support is incomplete. Adam Dunkels has recently announced IPv6 support for uIP (currently only as part of Contiki). Those changes need to be ported to NuttX. Status: Open Priority: Medium + Title: LISTENING FOR UDP BROADCASTS Description: Incoming UDP broadcast should only be accepted if listening on INADDR_ANY(?) Status: Open Priority: Low + Title: READ-AHEAD THROTTLING Description: Read-ahead buffers capture incoming TCP data when no user thread is recv-ing the data. Should add some driver call to support throttling; when there is no listener for new data, the @@ -278,12 +303,14 @@ o Network (net/, drivers/net) Status: Open Priority: Medium + Title: STANDARDIZE ETHERNET DRIVER STATISTICS Description: Need to standardize collection of statistics from network drivers. apps/nshlib ifconfig command should present statistics. Status: Open Priority: Low + Title: CONCURRENT TCP SEND OPERATIONS Description: At present, there cannot be two concurrent active TCP send operations in progress using the same socket. This is because the uIP ACK logic will support only one transfer at a time. The @@ -296,6 +323,7 @@ o Network (net/, drivers/net) Priority: Medium-Low. This is an important issue for applications that send on the same TCP socket from multiple threads. + Title: UDP READ-AHEAD? Description: TCP supports read-ahead buffering to handle the receipt of TCP/IP packets when there is no read() in place. Should such capability be useful for UDP? PRO: Would reduce packet loss @@ -304,12 +332,14 @@ o Network (net/, drivers/net) Status: Open Priority: Medium + Title: NO POLL/SELECT ON UDP SOCKETS Description: poll()/select() is not implemented for UDP sockets because they do do not support read-ahead buffering. Therefore, there is never a case where you can read from a UDP socket without blocking. Status: Open, depends on UDP read-ahead support Priority: Medium + Title: POLL/SELECT ON TCP SOCKETS NEEDS READ-AHEAD Description: poll()/select() only works for availability of buffered TCP read data (when read-ahead is enabled). The way writing is handled in uIP, all sockets must wait when send and cannot @@ -318,24 +348,28 @@ o Network (net/, drivers/net) Priority: Medium... this does effect porting of applications that expect different behavior from poll()/select() - Description: sockets do not support all modes except for O_NONBLOCK. Sockets + Title: SOCKETS DO NOT ALWAYS SUPPORT O_NONBLOCK + Description: sockets do not support all modes for O_NONBLOCK. Sockets support only (1) TCP/IP non-blocking read operations when read-ahead buffering is enabled, and (2) TCP/IP accept() operations when TCP/IP connection backlog is enabled. Status: Open Priority: Low. + Title: UNFINISHED CRYSTALLAN CS89X0 DRIVER Description: I started coding a CrystalLan CS89x0 driver (drivers/net/cs89x0.c), but never finished it. Status: Open Priority: Low unless you need it. + Title: UNFINISHED ENC28J60 DRIVER Description: So far, I have not come up with a usable hardware platform to verify the ENC28J60 Ethernet driver (drivers/net/enc28j60.c). So it is untested. Status: Open Priority: Low unless you need it. + Title: UNTESTED IGMPv2 Description: Support for client-side IGMPv2 multicast has been added but not yet tested (because I don't have a proper environment for multicast testing). There are most likely errors that need to be fixed at least in the @@ -346,6 +380,7 @@ o Network (net/, drivers/net) Status: Open Priority: Low unless you need it. + Title: INTERFACES TO LEAVE/JOIN IGMP MULTICAST GROUP Description: The interfaces used to leave/join IGMP multicast groups is non-standard. RFC3678 (IGMPv3) suggests ioctl() commands to do this (SIOCSIPMSFILTER) but also status that those APIs are historic. NuttX implements these ioctl @@ -361,6 +396,7 @@ o Network (net/, drivers/net) the mechanism for leaving and joining groups is hidden behind a wrapper function so that little of this incompatibilities need be exposed. + Title: CONFIGURATIONS WITH TINY MTUS Description: Many configurations have the MTU (CONFIG_NET_BUFSIZE) set to very small numbers, less then the minimum MTU size that must be supported -- 576. This can cause problems in some networks: CONFIG_NET_BUFSIZE should @@ -376,25 +412,30 @@ o Network (net/, drivers/net) o USB (drivers/usbdev, drivers/usbhost) ^^^^^^^^^^^^^^^^^^^^ + Title: USB STORAGE DRIVER DELAYS Description: There is a workaround for a bug in drivers/usbdev/usbdev_storage.c. that involves delays. This needs to be redesigned to eliminate these delays. Status: Open Priority: Medium - Description: drivers/usbhost/usbhost_rtl8187.c is a work in progress. There is no RTL8187 - driver available yet. That is a work in progress. + Title: RTL8187 DRIVER IS UNFINISHED + Description: misc/drivers/usbhost_rtl8187.c is a work in progress. There is no RTL8187 + driver available yet. That is a work in progress it was abandoned because + it depends on having an 802.11g stack. Status: Open Priority: Low (Unless you need RTL8187 support). o Libraries (lib/) ^^^^^^^^^^^^^^^^ + Title: ENVIRON Description: The definition of environ in stdlib.h is bogus and will not work as it should. This is because the underlying representation of the environment is not an arry of pointers. Status: Open Priority: Medium + Title: FGETS IMPLEMENTATION Description: fgets implementation does not use C-buffered I/O, but rather talks to serial driver directly via read(). It includes VT-100 specific editting commands. This gets should be renamed readlin() @@ -403,16 +444,19 @@ o Libraries (lib/) Priority: Low (unless you are using mixed C-buffered I/O with fgets and fgetc, for example). + Title: TERMIOS Description: Need some minimal termios support... at a minimum, enough to switch between raw and "normal" modes to support behavior like that needed for readline(). Status: Open Priority: Low + Title: DAYS OF THE WEEK Description: strftime() and other timing functions do not handle days of the week. Status: Open Priority: Low + Title: RESETTING GETOPT() Description: There is an issue with the way that getopt() handles errors that return '?'. @@ -426,10 +470,12 @@ o Libraries (lib/) Status: Open Priority: Low + Title: FERROR() AND CLEARERR() Description: Not implemented: ferror() and clearerr() Status: Open Priority: Low + Title: CONCURRENT STREAM READ/WRITE Description: NuttX only supports a single file pointer so reads and writes must be from the same position. This prohibits implementation of behavior like that required for fopen() with the "a+" mode. @@ -451,14 +497,17 @@ o File system / Generic drivers (fs/, drivers/) NOTE: The NXFFS file system has its own TODO list at nuttx/fs/nxffs/README.txt + Title: CHMOD() AND TRUNCATE() Description: Implement chmod(), truncate(). Status: Open Priority: Low + Title: CAN POLL SUPPORT Description: At present, the CAN driver does not support the poll() method. Status: Open Priority: Low + Title: REMOVING PIPES AND FIFOS Description: There is no way to remove a FIFO or PIPE created in the psuedo filesystem. Once created, they persist indefinitely and cannot be unlinked. This is actually a more generic @@ -468,39 +517,39 @@ o File system / Generic drivers (fs/, drivers/) when there are not open references to the pipe/FIFO. Priority: Medium + Title: ROMFS CHECKSUMS Description: The ROMFS file system does not verify checksums on either volume header on on the individual files. Status: Open Priority: Low. I have mixed feelings about if NuttX should pay a performance penalty for better data integrity. + Title: SPI-BASED SD MULTIPLE BLOCK TRANSFERS Description: The simple SPI based MMCS/SD driver in fs/mmcsd does not yet handle multiple block transfers. Status: Open Priority: Medium-Low + Title: READ-AHEAD/WRITE BUFFER UNTESTED Description: Block driver read-ahead buffer and write buffer support is implemented but not yet tested. Status: Open Priority: Low + Title: SDIO-BASED SD READ-AHEAD/WRITE BUFFERING INCOMPLETE Description: The drivers/mmcsd/mmcsd_sdio.c driver has hooks in place to support read-ahead buffering and write buffering, but the logic is incomplete and untested. Status: Open Priority: Low + Title: ENC29J60 DRIVER UNTESTED Description: ENC28J60 driver is complete, but untested (I still haven't got a good ENC28J60 test platform). Status: Open Priority: Low - Description: Time stamping is not implemented in the NuttX FAT file system. - See the following functions in fs/fat/fs_fat32util.c: - fat_systime2fattime() and fat_fattime2systime() - Status: Open - Priority: Medium - + Title: SERIAL DRIVER DOES NOT RETURN WHEN SIGNAL RECEIVED Description: The serial driver (drivers/serial) should return with an error and errno=EINTR when an interrupt is received. However, the serial driver just continues waiting: @@ -515,6 +564,7 @@ o File system / Generic drivers (fs/, drivers/) Status: Open Priority Medium + Title: POLLHUP SUPPORT Description: All drivers that support the poll method should also report POLLHUP event when the driver is closedd. Status: Open @@ -523,11 +573,13 @@ o File system / Generic drivers (fs/, drivers/) o Graphics subystem (graphics/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: UNTESTED GRAPHICS APIS Description: Testing of all APIs is not complete. See http://nuttx.sourceforge.net/NXGraphicsSubsystem.html#testcoverage Status: Open Priority: Medium + Title: ITALIC FONTS / NEGATIVE FONT OFFSETS Description: Font metric structure (in include/nuttx/nx/nxfont.h) should allow negative X offsets. Negative x-offsets are necessary for certain glyphs (and is very common in italic fonts). @@ -538,25 +590,15 @@ o Graphics subystem (graphics/) in the current structure. Priority: Low. - Description: In the kernel build mode (where NuttX is built as a monlithic - kernel and user code must trap into the protected kernel via - syscalls), the single user mode cannot be supported. In this - built configuration, only the multiple user mode can be supported - with the NX server residing inside of the kernel space. In - this case, most of the user end functions in graphics/nxmu - must be moved to lib/nx and those functions must be built into - libuser.a to be linked with the user-space code. - Status: Open - Priority: Low -- the kernel build configuration is not fully fielded - yet. - o Pascal Add-On (pcode/) ^^^^^^^^^^^^^^^^^^^^^^ + Title: P-CODES IN MEMORY UNTESTED Description: Need APIs to verify execution of P-Code from memory buffer. Status: Open Priority: Low + Title: SMALLER LOADER AND OBJECT FORMAT Description: Loader and object format may be too large for some small memory systems. Consider ways to reduce memory footprint. Status: Open @@ -565,6 +607,7 @@ o Pascal Add-On (pcode/) o Documentation (Documentation/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: DOCUMENT APIS USABLE FROM INTERRUPT HANDLERS Description: Need to document which APIs can be used in interrupt handlers (like mq_send and sem_post) and which cannot. Status: Open @@ -573,22 +616,33 @@ o Documentation (Documentation/) o Build system ^^^^^^^^^^^^ + Title: DEPENDENCIES IN THE BOARD DIRECTORY Description: Dependencies do not work correctly under configs//src (same as arch//src/board). Status: Open Priority: Medium (maybe higher for z80 target) + Title: NUTTX CONFIGURATION TOOL Description: Need a NuttX configuration tool. The number of configuration settings has become quite large and difficult to manage manually. Status: Open Priority: Medium-low + Title: NATIVE WINDOWS BUILD Description: At present, NuttX builds only under Linux or Cygwin. Investigate the possibility of a native Windows build using something like the GNUWin32 tools (coreutils+make+grep+sed+uname). Status: Open Priority: Low + Title: WINDOWS DEPENDENCY GENERATION + Description: Dependency generation is currently disabled when a Windows native + toolchain is used. I think that the only issue is that all of the + Windows dependencies needed to be quoted in the Make.dep files. + Status: Open + Priority: Low -- unless some dependency-related build issues is discovered. + + Title: SETENV.H Description: Logic in most setenv.sh files can create the following problem on many platforms: @@ -611,6 +665,7 @@ o Build system Priority: Low. Use of setenv.sh is optional and most platforms do not have this problem. Scripts will be fixed one-at-a-time as is appropropriate. + Title: MAKE EXPORT LIMITATIONS Description: The top-level Makefile 'export' target that will bundle up all of the NuttX libraries, header files, and the startup object into an export-able tarball. This target uses the tools/mkexport.sh script. Issues: @@ -623,9 +678,23 @@ o Build system Status: Open Priority: Low. + Title: KERNEL BUILD MODE ISSUES + Description: In the kernel build mode (where NuttX is built as a monlithic + kernel and user code must trap into the protected kernel via + syscalls), the single user mode cannot be supported. In this + built configuration, only the multiple user mode can be supported + with the NX server residing inside of the kernel space. In + this case, most of the user end functions in graphics/nxmu + must be moved to lib/nx and those functions must be built into + libuser.a to be linked with the user-space code. + Status: Open + Priority: Low -- the kernel build configuration is not fully fielded + yet. + o Linux/Cywgin simulation (arch/sim) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: SIMULATED SERIAL DRIVER Description: The simulated serial driver has some odd behavior. It will stall for a long time on reads when the C stdio buffers are being refilled. This only effects the behavior of things like @@ -634,6 +703,7 @@ o Linux/Cywgin simulation (arch/sim) Status: Open Priority: Low (because the simulator is only a test/development platform) + Title: SIMULATOR BUILD ON 64-BIT MACHINES Description: Simulator does not build correctly on 64-bit machines. Two issues: 1) It saves addresses in 32-bit types and these fail when cast @@ -648,6 +718,7 @@ o Linux/Cywgin simulation (arch/sim) See the patch 0001-Quick-hacks-to-build-sim-nsh-ostest-on-x86_64-as-32-.patch that can be found at http://tech.groups.yahoo.com/group/nuttx/files. + Title: SIMULATOR NETWORKING SUPPORT Description: I never did get networking to work on the sim Linux target. On Linux, it tries to use the tap device (/dev/net/tun) to emulate an Ethernet NIC, but I never got it correctly integrated with the NuttX networking. @@ -656,6 +727,7 @@ o Linux/Cywgin simulation (arch/sim) Status: Open Priority: Low (unless you want to test networking features on the simulation). + Title: ROUND-ROBIN SCHEDULING IN THE SIMULATOR Description: Since the simulation is not pre-emptible, you can't use round-robin scheduling (no time slicing). Currently, the timer interrupts are "faked" during IDLE loop processing and, as a result, there is no @@ -666,6 +738,7 @@ o Linux/Cywgin simulation (arch/sim) Status: Open Priority: Low + Title: NSH ISSUES ON THE SIMULATOR Descripion: The NSH example has some odd behaviors. Mult-tasking -- for example, execution of commands in background -- does not work normally. This is due to the fact that NSH uses the system standard input for the @@ -678,6 +751,7 @@ o Linux/Cywgin simulation (arch/sim) because NSH will "sleep" when it waits for console inpu and other tasks can run freely. + Title: DOUBLE COMMAND ECHO Description: In the NSH example, the host HOST echoes each command so after you you enter a command, the command is repeated on the next line. This is an artifact of the simulator only. @@ -688,14 +762,16 @@ o Linux/Cywgin simulation (arch/sim) o ARM (arch/arm/) ^^^^^^^^^^^^^^^ + Title: IMPROVED ARM INTERRUPT HANDLING Description: ARM interrupt handling performance could be improved in some ways. One easy way is to use a pointer to the context save area in current_regs instead of using up_copystate so much. see handling of 'current_regs" in arch/arm/src/armv7-m/* for examples of how this might be done. - Status: Open + Status: Open Priority: Low + Title: IMPROVED ARM INTERRUPT HANDLING Description: The ARM and Cortex-M3 interrupt handlers restores all regisers upon return. This could be improved as well: If there is no context switch, then the static registers need not be restored @@ -704,6 +780,7 @@ o ARM (arch/arm/) Status: Open Priority: Low + Title: SVCALLS AND HARDFAULTS Description: The Cortex-M3 user context switch logic uses SVCall instructions. This user context switching time could be improved by eliminating the SVCalls and developing assembly language implementations @@ -718,6 +795,7 @@ o ARM (arch/arm/) Status: Open Priority: Low + Title: ARM INTERRUPTS AND USER MODE Description: The ARM interrupt handling (arch/arm/src/arm/up_vectors.S) returns using 'ldmia sp, {r0-r15}^' My understanding is that this works fine because everything is in kernel-mode. In an operating model @@ -733,6 +811,7 @@ o ARM (arch/arm/) o ARM/C5471 (arch/arm/src/c5471/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: UART RECONFIGURATION Description: UART re-configuration is untested and conditionally compiled out. Status: Open Priority: Medium. ttyS1 is not configured, but not used; ttyS0 is configured @@ -741,6 +820,7 @@ o ARM/C5471 (arch/arm/src/c5471/) o ARM/DM320 (arch/arm/src/dm320/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: DEBUG ISSUES Description: config/ntos-dm320: It seems that when a lot of debug statements are added, the system no longer boots. This is suspected to be a stack problem: Making the stack bigger or removing arrays on @@ -749,14 +829,17 @@ o ARM/DM320 (arch/arm/src/dm320/) Status: Open Priority: Medium + Title: USB DEVICE DRIVER UNTESTED Description: A USB device controller driver was added but has never been tested. Status: Open Priority: Medium + Title: FRAMEBUFFER DRIVER UNTESTED Description: A framebuffer "driver" was added, however, it remains untested. Status: Open Priority: Medium + Title: VIDEO ENCODER DRIVER Description: In order to use the framebuffer "driver" additional video encoder logic is required to setupt composite video output or to interface with an LCD. @@ -766,12 +849,14 @@ o ARM/DM320 (arch/arm/src/dm320/) o ARM/i.MX (arch/arm/src/imx/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: PORT IS INCOMPLETE Description: The basic port of the i.MX1 architecuture was never finished. The port is incomplete (as of this writing, is still lacks a timer, interrupt decoding, USB, network) and untested. Status: Open Priority: Medium (high if you need i.MX1/L support) + Title: SPI METHODS ARE NOT THREAD SAFE Description: SPI methods are not thread safe. Needs a semaphore to protect from re-entrancy. Status: Open Priority: Medium -- Will be very high if you do SPI access from multiple threads. @@ -779,11 +864,13 @@ o ARM/i.MX (arch/arm/src/imx/) o ARM/LPC17xx (arch/arm/src/lpc17xx/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: USB DMA INCOMPLETE Description: USB DMA not fully implemented. Partial logic is in place but it is fragmentary and bogus. (Leveraged from the lpc214x) Status: Open Priority: Low + Title: SSP DRIVER IMPROVEMENTS Description: a) At present the SSP driver is polled. Should it be interrupt driven? Look at arch/arm/src/imx/imx_spi.c -- that is a good example of an interrupt driven SPI driver. Should be very easy to part that architecture @@ -795,6 +882,7 @@ o ARM/LPC17xx (arch/arm/src/lpc17xx/) Status: Open Priority: Medium + Title: NOKIA LCD DRIVER NONFUNCTIONAL Description: An LCD driver for the Olimex LPC1766STK has been developed. However, that driver is not yet functional on the board: The backlight comes on, but nothing is visible on the display. @@ -804,20 +892,24 @@ o ARM/LPC17xx (arch/arm/src/lpc17xx/) o ARM/LPC214x (arch/arm/src/lpc214x/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: VECTOR INTERRUPTS Description: Should use Vector Interrupts Status: Open Priority: Low + Title: USB DMA INCOMPLETE Description: USB DMA not fully implemented. Partial logic is in place but it is fragmentary and bogus. Status: Open Priority: Low + Title: USB SERIAL DRIVER REPORTS WRONG ERROR Description: USB Serial Driver reports wrong error when opened before the USB is connected (reports EBADF instead of ENOTCONN) Status: Open Priority: Low + Title: SPI DRIVER IMPROVEMENTS Description: At present the SPI driver is polled. Should it be interrupt driven? Look at arch/arm/src/imx/imx_spi.c -- that is a good example of an interrupt driven SPI driver. Should be very easy to part that architecture @@ -825,10 +917,12 @@ o ARM/LPC214x (arch/arm/src/lpc214x/) Status: Open Priority: Medium + Title: SPI METHODS ARE NOT THREAD SAFE Description: SPI methods are not thread safe. Needs a semaphore to protect from re-entrancy. Status: Open Priority: Medium -- Will be very high if you do SPI access from multiple threads. + Title: SPI DRIVER DELAYS Description: At present the SPI driver is polled -AND- there is a rather large, arbitrary, delay in one of the block access routines. The purpose of the delay is to avoid a race conditions. This begs for a re-design -OR- at a minimum, some @@ -836,16 +930,18 @@ o ARM/LPC214x (arch/arm/src/lpc214x/) Status: Open Priority: Medium + Title: 2GB SD CARD ISSUES Desription: I am unable to initialize a 2Gb SanDisk microSD card (in adaptor) on the the mcu123 board. The card fails to accept CMD0. Doesn't seem like a software issue, but if anyone else sees the problem, I'd like to know. Related: Fixes were recently made for the SDIO-based MMC/SD driver to support 2Gb cards -- the blocksize was forced to 512 in all cases. The SPI- based driver may also have this problem (but I don't think this would have - andything to do with CMD0). + anything to do with CMD0). Status: Open Priority: Uncertain + Title: USB DEVICE DRIVER ISSUES? Description: Possible errors in USB device driver reported "I suspect there's a few issues in the lpc214x USB driver - in particular it doesn't stall both in/out endpoints for unsupported setup requests and it doesn't call @@ -857,6 +953,7 @@ o ARM/LPC214x (arch/arm/src/lpc214x/) o ARM/LPC313x (arch/arm/src/lpc313x/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: PLATFORM-SPECIFIC LOGIC Description: arch/arm/src/lpc313x/lpc313x_spi.c contains logic that is specific to the Embedded Artist's ea3131 board. We need to abstract the assignment of SPI chip selects and logic SPI functions (like SPIDEV_FLASH). My thoughts are: @@ -870,6 +967,7 @@ o ARM/LPC313x (arch/arm/src/lpc313x/) Status: Open Priority: High if you want to use SPI on any board other than the ea3131. + Title: SPI DRIVER Description: arch/arm/src/lpc313x/lpc313x_spi.c may or may not be functional. It was reported to be working, but I was unable to get it working with the Atmel at45dbxx serial FLASH driver. @@ -879,17 +977,20 @@ o ARM/LPC313x (arch/arm/src/lpc313x/) o ARM/STR71x (arch/arm/src/str71x/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: UNVERIFIED MMC SUPPORT Description: Verify SPI driver and integrate with MMC support. This effort is stalled at the moment because the slot on the Olimex board only accepts MMC card; I have no MMC cards, only SD cards which won't fit into the slot. Status: Open Priority: Medium + Title: NO USB DRIVER Description: Develop a USB driver and integrate with existing USB serial and storage class drivers. Status: Open Priority: Medium + Title: SPI METHODS ARE NOT THREAD SAFE Description: SPI methods are not thread safe. Needs a semaphore to protect from re-entrancy. Status: Open Priority: Medium -- Will be very high if you do SPI access from multiple threads. @@ -897,22 +998,19 @@ o ARM/STR71x (arch/arm/src/str71x/) o ARM/LM3S6918 (arch/arm/src/lm3s/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: I2C DRIVER Description: Still need to implement I2C Status: Open Priority: Low + Title: SSI OVERRUNS Description: Should terminate SSI/SPI transfer if an Rx FIFO overrun occurs. Right now, if an Rx FIFO overrun occurs, the SSI driver hangs. Status: Open Priority: Medium, If the transfer is properly tuned, then there should not be any Rx FIFO overruns. - Description: Dependency generation is currently disabled when a Windows native - toolchain is used. I think that the only issue is that all of the - Windows dependencies needed to be quoted in the Make.dep files. - Status: Open - Priority: Low -- unless some dependency-related build issues is discovered. - + Title: THTTPD BUGS Description: There are some lingering bugs in THTTPD, possibly race conditions. This is covered above under Network Utilities, but is duplicated here to point out that the LM3S suffers from this bug. @@ -925,10 +1023,12 @@ o ARM/LM3S6918 (arch/arm/src/lm3s/) o ARM/STM32 (arch/arm/src/stm32/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: NOR FLASH DRIVER Description: NOR Flash driver with FTL layer to support a file system. Status: Open Priority: Low + Title: USBSERIAL ISSUES Description A USB device-side driver is in place but not well tested. At present, the apps/examples/usbserial test sometimes fails. The situation that causes the failure is: @@ -950,10 +1050,12 @@ o ARM/STM32 (arch/arm/src/stm32/) Status: Open Priority: Medium-High + Title: FSMC EXTERNAL MEMORY UNTESTED Description: FSMC external memory support is untested Status: Open Priority: Low + Title: DMA EXTENSIONS Description: DMA logic needs to be extended. DMA2, Channel 5, will not work because the DMA2 channels 4 & 5 share the same interrupt. Status: Open @@ -963,6 +1065,7 @@ o ARM/STM32 (arch/arm/src/stm32/) o AVR (arch/avr) ^^^^^^^^^^^^^^ + Title: AMBER WEB SERVER UNTESTED Description: There is a port for the Amber Web Server ATMega128, however this is completely untested due to the lack to compatible, functional test equipment. @@ -970,6 +1073,7 @@ o AVR (arch/avr) Priority: The priority might as well be low since there is nothing I can do about it anyway. + Title: STRINGS IN RAM Description: Many printf-intensive examples (such as the OS test) cannot be executed on most AVR platforms. The reason is because these tests/examples generate a lot of string data. The build system currently places all @@ -981,6 +1085,7 @@ o AVR (arch/avr) Priority: Low. The AVR is probably not the architecuture that you want to use for extensive string operations. + Title: SPI AND USB DRIVERS UNTESTED Description: An SPI driver and a USB device driver exist for the AT90USB (as well as a USB mass storage example). However, this configuration is not fully debugged as of the NuttX-6.5 release. @@ -992,6 +1097,7 @@ o AVR (arch/avr) Status: Open Priority: Medium-High. + Title: AVR32 PORT IS NOT FULLY TESTED Description: A complete port for the AVR32 is provided and has been partially debugged. There may still be some issues with the serial port driver. @@ -1004,6 +1110,7 @@ o Intel x86 (arch/x86) o 8051 / MCS51 (arch/8051/) ^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: STACK OVERFLOWS DURING INTERRUPT HANDLING Description: Current status: - Basic OS task management seems OK - Fails when interrupts enabled. The stack pointer is around @@ -1014,6 +1121,7 @@ o 8051 / MCS51 (arch/8051/) Status: Open Priority: Low, 8051 is a tough platform because of the tiny stack. + Title: TIMER 0 AS SYSTEM TIMER Description: Use timer 0 as system timer. Timer 2 is needed for second UART. Logic is implemented, but there needs to be a system configuration to change the ticks-per-second value to match the @@ -1021,6 +1129,7 @@ o 8051 / MCS51 (arch/8051/) Status: Open Priority: Low + Title: OVERFLOWS DURING BUILD Description: During build, there are several integer overflows reported: sched/gmtime_r.c aroud lines 184 and 185 sched/clock_initialize.c at line 107 @@ -1034,6 +1143,7 @@ o 8051 / MCS51 (arch/8051/) but this has not been verified on this platform). Priority: Medium + Title: DATA INITIALIZATION Description Global data is not being initialized. Logic like that of SDCCs crt0*.s needs to be incorporated into the system boot logic Status: Open @@ -1042,15 +1152,15 @@ o 8051 / MCS51 (arch/8051/) o MIPS (arch/mips) ^^^^^^^^^^^^^^^^ - Description: A port to the PIC32MX has been completed, but is pending debug. - Right now, there are some issues with intregating the PICKit 3 - and MPLAB so I don't have capability to debug the port. + Title: PIC32MX PORT UNVERIFIED + Description: A port to the PIC32MX has been completed, but is pending verification. Status: Open Priority: High o Hitachi/Renesas SH-1 (arch/sh/src/sh1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: SH-1 IS UNUSABLE Description: There are instabilities that make the SH-1 port un-usable. The nature of these is not understood; the behavior is that certain SH-1 instructions stop working as advertised. I have seen the following @@ -1071,11 +1181,10 @@ o Hitachi/Renesas SH-1 (arch/sh/src/sh1) Priority: Low -- because the SH-1, SH7032, is very old and only of historical interest. - Description: arch/sh has been restructured to support M16C. Need to verify that - SH-1 still builds. - Status: Open - Priority: Low +o Renesas M16C/26 (arch/sh/src/m16c) + ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: M16C DOES NOT BUILD Description: The M16C target cannot be built. The GNU m16c-elf-ld link fails with the following message: @@ -1091,18 +1200,18 @@ o Hitachi/Renesas SH-1 (arch/sh/src/sh1) Status: Open Priority: High -- this is a show stopper for M16C. -o Renesas M16C/26 (arch/sh/src/m16c) - ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - + Title: M16C PORT UNTESTED Description: Coding of the initial port is complete, but is untested. Status: Open Priority: Low + Title: NO SERIAL CONNECTOR Description: Serial drivers were developed for the M16C, however, the SKP16C26 StarterKit has no serial connectors. Status: Open Priority: Low + Title: UNIMPLEMENTED M16C DRIVERS Description: Should implement SPI, I2C, Virual EEPROM, FLASH, RTC drivers Status: Open Priority: Medium @@ -1110,6 +1219,7 @@ o Renesas M16C/26 (arch/sh/src/m16c) o z80/z8/ez80 (arch/z80) ^^^^^^^^^^^^^^^^^^^^^^^ + Title: SDCC INTEGER OVERFLOWS Description: The SDCC version the same problems with integer overflow during compilation as described for pjrc-8051. At typical cause is code like usleep(500*1000) which exceeds the range of a 16-bit integer. @@ -1117,6 +1227,7 @@ o z80/z8/ez80 (arch/z80) been verified on these platforms. Priority: See pjrc-8051 + Title: Z80 SIMULATED CONSOLE Description: The simulated Z80 serial console (configs/z80sim/src/z80_serial.c + driver/serial.c) does not work. This is because there are no interrupts in the simulation so there is never any serial @@ -1125,12 +1236,14 @@ o z80/z8/ez80 (arch/z80) Priority: Low -- the simulated console is not critical path and the designs to solve the problem are complex. + Title: ZDS-II LIBRARIAN WARNINGS Description: ZDS-II Librarian complains that the source for the .obj file is not in the library. Status: Open Priority: Low, thought to be cosmetic. I think this is a consequence of replacing vs. inserting the library. + Title: ZDS-II COMPILER PROBLEMS Description: The ZDS-II compiler (version 4.10.1) fails with an internal error while compiler mm/mm_initialize. This has been reported as incident 81509. @@ -1154,20 +1267,19 @@ o z80/z8/ez80 (arch/z80) Status: Open Priority: High + Title: EZ8 PRIORITY INTERRUPTS Description: Add support for prioritized ez8 interrupts. Currently logic supports only nominal interrupt priority. Status: Open Priority: Low + Title: Z8ENCORE ONLY VERIFIED ON SIMULATOR Description: The z8Encore! port has only been verified on the ZDS-II instruction set simulator. Status: Open Priority: Medium - Description: Upgrade to the ZDS-II Z8Encore! 4.11.0 toolchain - Status: Open - Priority: Low - + Title: XTRS CLEAN Description: The XTRS target (configs/xtrs) has a clean problem. The clean rule removes .asm files. This works because there are no .asm files except in sub-directories that are provided from 'make clean' -- @@ -1176,16 +1288,19 @@ o z80/z8/ez80 (arch/z80) Status: Open Priority: High if you happen to be working with XTRS. + Title: SPI/I2C UNTESTED Description: A "generic" SPI and I2C drivers have been coded for the eZ80Acclaim! However, these remains untested since I have no SPI or I2C devices for the board (yet). Status: Open Priority: Med + Title: SPI METHODS ARE NOT THREAD SAFE Description: SPI methods are not thread safe. Needs a semaphore to protect from re-entrancy. Status: Open Priority: Medium -- Will be very high if you do SPI access from multiple threads. + Title: I2C UNTESTED Description: A "generic" I2C driver has been coded for the eZ8Encore! However, this remains untested since I have no I2C devices for the board (yet). @@ -1195,12 +1310,14 @@ o z80/z8/ez80 (arch/z80) o z16 (arch/z16) ^^^^^^^^^^^^^^^^ + Title: ZDS-II LIBRARIAN WARNINGS Description: ZDS-II Librarian complains that the source for the .obj file is not in the library. Status: Open Priority: Low, thought to be cosmetic. I think this is a consequence of replacing vs. inserting the library. + Title: SERIAL DRIVER HANGS Description: When the interrupt-driven serial driver is used, the system hangs. This is because of TX ready (TRDE) interrupts that get lost while interrupts are disabled. The existing @@ -1210,11 +1327,13 @@ o z16 (arch/z16) Priority: Medium. A polled, write-only serial driver is used in the interim for system testing. + Title: SYSTEM DELAYS Description: The system delays do not appear to be correct with the apps/examples/ostest/timedmqueue.c test. Status: Open Priority: Medium-High + Title: PROBLEMS WHEN DEBUG DISABLED Description: At present, the z16f port does not run properly when CONFIG_DEBUG is disabled: The obvious symptom is that there is no printf() output. I have isolated with problem to errors in optimization. @@ -1236,6 +1355,7 @@ o z16 (arch/z16) Status: Open Priority: Medium-High + Title: PASCAL ADD-ON Description: The pascal add-on does not work with the z16f (that is configuration z16f2800100zcog/pashello). This appears to be another ZDS-II error: when executing the instruction @@ -1267,17 +1387,20 @@ o z16 (arch/z16) uwcase in the NuttX code base. Priority: Medium + Title: USE SPOV Description: Add support to maintain SPOV in context switching. This improvement will provide protection against stack overflow and make a safer system solution. Status: Open Priority: Low + Title: PRIORITIZED INTERRUPTS Description: Add support for prioritized interrupts. Currently logic supports only nominal interrupt priority. Status: Open Priority: Low + Title: ZDS-II COMPILER PROBLEMS Description: The file drivers/mmcsd/mmcsd_sdio.c generates an internal compiler error like: @@ -1292,6 +1415,7 @@ o z16 (arch/z16) o mc68hc1x (arch/hc) ^^^^^^^^^^^^^^^^^^ + Title: BANKED MODE Description: There is no script for building in banked mode (more correctly, there is a script, but logic inside the script has not yet been implemented). It would be necessary to implement banked mode to able to access more @@ -1301,6 +1425,7 @@ o mc68hc1x (arch/hc) o Network Utilities (apps/netutils/) + Title: UIP RESOLVER Description: One critical part of netutils/ apps is untested: The uIP resolver in netutils/resolv. The webclient code has been tested on host using gethosbyname(), but still depends on the @@ -1308,16 +1433,19 @@ o Network Utilities (apps/netutils/) Status: Open Priority: Medium, Important but not core NuttX functionality + Title: PPP PORT Description: Port PPP support from http://contiki.cvs.sourceforge.net/contiki/contiki-2.x/backyard/core/net/ppp/ Status: Open Priority: Low + Title: UNVERIFIED THTTPD FEATURES Description: Not all THTTPD features/options have been verified. In particular, there is no test case of a CGI program receiving POST input. Only the configuration of apps/examples/thttpd has been tested. Status: Open Priority: Medium + Title: THE ARP ISSUES AGAIN Description: The first GET received by THTTPD is not responded to. Refreshing the page from the browser solves the problem and THTTPD works fine after thatg. I believe that this is the duplicate of another bug: "Outgoing [uIP] packets are dropped @@ -1325,6 +1453,7 @@ o Network Utilities (apps/netutils/) Status: Open Priority: Medium + Title: THTTPD WARNINGS Description: If the network is enabled, but THTTPD is not configured, it spews out lots of pointless warnings. This is kind of annoying and unprofessional; needs to be fixed someday. @@ -1334,6 +1463,7 @@ o Network Utilities (apps/netutils/) o NuttShell (NSH) (apps/nshlib) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: EACH TCP PACKET CAUSES PROMPT Description: When the telnetd front end is received, each TCP packet received causes a prompt (nsh >) to be presented. The prompt should only be presented when the user enters a @@ -1341,6 +1471,7 @@ o NuttShell (NSH) (apps/nshlib) Status: Open Priority: Low + Title: WGET UNTESTED Description: The wget command has been incorporated into NSH, however it is still untested as of this writing (only because I have not had the correct network setup for the testing @@ -1349,6 +1480,7 @@ o NuttShell (NSH) (apps/nshlib) Status: Open Priority: Med-High + Title: IFCONFIG AND MULTIPLE NETWORK INTERFACES Descripton: The ifconfig command will not behave correctly if an interface is provided and there are multiple interfaces. It should only show status for the single interface on the command line; it will @@ -1356,10 +1488,12 @@ o NuttShell (NSH) (apps/nshlib) Status: Open Priority: Low (multiple network interfaces not fully supported yet anyway). + Title: RUN NXFLAT PROGRAMS Description: Add support to NSH to run NXFLAT programs from a ROMFS file system Status: Open Priority: Low (enhancement) + Title: ARP COMMAND Description: Add an ARP command so that we can see the contents of the ARP table. Status: Open Priority: Low (enhancement) @@ -1367,22 +1501,26 @@ o NuttShell (NSH) (apps/nshlib) o Other Applications & Tests (apps/examples/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + Title: EXAMPLES/PIPE ON CYGWIN Description: The redirection test (part of examples/pipe) terminates incorrectly on the Cywgin-based simulation platform (but works fine on the Linux-based simulation platform). Status: Open Priority: Low + Title: EXAMPLES/WGET UNTESTED Description: examples/wget is untested on the target (it has been tested on the host, but not in the target using the uIP resolv logic). Status: Open Priority: Med + Title: EXAMPLES/SENDMAIL UNTESTED Description: examples/sendmail is untested on the target (it has been tested on the host, but not on the target. Status: Open Priority: Med + Title: EXAMPLES/NX FONT CACHING Description: The font caching logic in examples/nx is incomplete. Fonts are added to the cache, but never removed. When the cache is full it stops rendering. This is not a problem for the examples/nx @@ -1393,6 +1531,7 @@ o Other Applications & Tests (apps/examples/) Priority: Low. This is not really a problem becauses examples/nx works fine with its bogus font caching. + Title: EXAMPLES/NXTEXT ARTIFACTS Description: examples/nxtext. Artifacts when the pop-up window is opened. There are some artifacts that appear in the upper left hand corner. These seems to be related to window creation. At diff --git a/arch/arm/src/stm32/stm32_usbdev.c b/arch/arm/src/stm32/stm32_usbdev.c index c10ac104b3..54148b230a 100644 --- a/arch/arm/src/stm32/stm32_usbdev.c +++ b/arch/arm/src/stm32/stm32_usbdev.c @@ -1085,8 +1085,7 @@ static struct stm32_req_s *stm32_rqdequeue(struct stm32_ep_s *privep) * Name: stm32_rqenqueue ****************************************************************************/ -static void stm32_rqenqueue(struct stm32_ep_s *privep, - struct stm32_req_s *req) +static void stm32_rqenqueue(struct stm32_ep_s *privep, struct stm32_req_s *req) { req->flink = NULL; if (!privep->head) @@ -1446,7 +1445,10 @@ static void stm32_epdone(struct stm32_usbdev_s *priv, uint8_t epno) priv->rxstatus = USB_EPR_STATRX_VALID; } - else + + /* NAK further OUT packets if there there no more read requests */ + + if (stm32_rqempty(privep)) { usbtrace(TRACE_INTDECODE(STM32_TRACEINTID_EPOUTPENDING), (uint16_t)epno);