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Maxim Pegasus gettimeofday()

After determining in MaximPegasus Duktape Problems that gettimeofday() is not implemented, we need implement it.

We have these choices

Resources

DuktapeEclipseARMCortexM4 -> TimerSetup

Let's try it.

Adding the code

int _gettimeofday(struct timeval *tv, void *tz)
{
        unsigned long i,j;
        tv->tv_sec              = sysSeconds;

        i                       = (65306 - (TIMER1->TAV & 0x00FFFF));
        i                       *= 15312;               // Every count from prescaler = 0.0153125

        // Taking the remains from prescaler
        j                       = ((TIMER1->TAV & 0xFF0000) >> 16);
        j                       = 245-j;
        j                       *= 62;
        tv->tv_usec             = i+j;

        return(0);
}

The compilation fails:

../eduk2.cpp: In function 'int _gettimeofday(timeval*, void*)':
../eduk2.cpp:31:35: error: 'sysSeconds' was not declared in this scope
         tv->tv_sec              = sysSeconds;
                                   ^
../eduk2.cpp:33:45: error: 'TIMER1' was not declared in this scope
         i                       = (65306 - (TIMER1->TAV & 0x00FFFF));
                                             ^

Looking at the contents of https://chess.eecs.berkeley.edu/densoeal/wiki/uploads/Main/LPC-Accessor.tar.gz:

bash-3.2$ find ~/Downloads/LPC-Accessor -type f | xargs grep sysSeconds
/Users/cxh/Downloads/LPC-Accessor/Debug/DUK-M4-LPC-Led.map: .bss.sysSeconds
/Users/cxh/Downloads/LPC-Accessor/Debug/DUK-M4-LPC-Led.map:                0x100001e4                sysSeconds
Binary file /Users/cxh/Downloads/LPC-Accessor/Debug/LPC-Accessor.elf matches
/Users/cxh/Downloads/LPC-Accessor/Debug/LPC-Accessor.map: .bss.sysSeconds
/Users/cxh/Downloads/LPC-Accessor/Debug/LPC-Accessor.map:                0x10001bf4                sysSeconds
Binary file /Users/cxh/Downloads/LPC-Accessor/Debug/system/src/cortexm/exception_handlers.o matches
Binary file /Users/cxh/Downloads/LPC-Accessor/Debug/system/src/DEVICE/drv_BrdLPC4088.o matches
/Users/cxh/Downloads/LPC-Accessor/Debug/testDUK-ARM_M4-LPC.map: .bss.sysSeconds
/Users/cxh/Downloads/LPC-Accessor/Debug/testDUK-ARM_M4-LPC.map:                0x100001e4                sysSeconds
/Users/cxh/Downloads/LPC-Accessor/system/include/DEVICE/LPC177x_8x.h:extern long sysSeconds;
/Users/cxh/Downloads/LPC-Accessor/system/src/cortexm/exception_handlers.c:      sysSeconds++;
/Users/cxh/Downloads/LPC-Accessor/system/src/DEVICE/drv_BrdLPC4088.c:long       sysSeconds = 0;
/Users/cxh/Downloads/LPC-Accessor/system/src/DEVICE/drv_BrdLPC4088.c:   tv->tv_sec              = sysSeconds;
bash-3.2$

It seems like a location in memory is called sysSeconds?

Let's try the next one again.

ARMmbed/mbed-time

Summary: Yotta is used with mbed 3. mbed 5 uses different tools, see https://www.mbed.com/en/platform/software/mbed-yotta/

mbed 5 includes an RTOS, which we may or may not want.

https://github.com/ARMmbed/mbed-time uses yotta, thus it requires mbed 3.

As the MAX32630 was released after mbed 5 was released, it is not clear if mbed 3 is supported or usable on this chip.

Thus, https://github.com/ARMmbed/mbed-time is probably not usable on this chip.

Whole Yotta Love?

This time, let's follow the instructions.

http://yottadocs.mbed.com/ has installation instructions, all I had to do was

pip2 install yotta

Protip: use pip2, not pip. See Maxim Pegasus - Python2

Yotta fails to install mbed-time

bash-3.2$ yotta install mbed-time
warning: The build target has not been set, so the default (x86-osx-native,) is being used. You can use `yotta target <t\
argetname>` to set the build target. See http://yottadocs.mbed.com/tutorial/targets.html for more information on using t\
argets.
info: get versions for x86-osx-native
info: download x86-osx-native@0.0.8 from the public module registry

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Press enter to continue.                                                                                                
Your browser will open to complete login.

waiting for response...
If you are unable to use a browser on this machine, please copy and paste this URL into a browser:
https://yotta.mbed.com/#login/<elided>
..
info: get versions for mbed-hal
info: download mbed-hal@1.3.0 from the public module registry
info: get versions for mbed-drivers
info: download mbed-drivers@1.5.0 from the public module registry
info: get versions for cmsis-core
info: download cmsis-core@1.2.0 from the public module registry
info: get versions for ualloc
info: download ualloc@1.3.0 from the public module registry
info: get versions for minar
info: download minar@1.3.0 from the public module registry
info: get versions for core-util
info: download core-util@1.8.0 from the public module registry
info: get versions for compiler-polyfill
info: download compiler-polyfill@1.3.0 from the public module registry
info: get versions for greentea-client
info: download greentea-client@1.1.0 from the public module registry
info: get versions for dlmalloc
info: download dlmalloc@1.1.0 from the public module registry
info: get versions for minar-platform
info: download minar-platform@1.1.0 from the public module registry
info: get versions for minar-platform-posix
error: Failed to satisfy dependencies of /Users/cxh/ptII/org/terraswarm/accessor/accessors/web/hosts/duktape/mbed-duktape2/mbed-time/yotta_modules/minar-platform:
error: minar-platform-posix does not exist in the modules registry. Check that the name is correct, and that it has been published.
bash-3.2$

It looks like there is not a yotta target for this board?

bash-3.2$ yotta search target
xdk110-gcc 0.0.2:
    Official mbed build target for the XDK110, using the GCC toolchain.
    mbed-target:xdk110, mbed-target:xdk, efm32gg, gcc
efm32hg-stk-gcc 1.0.0:
    Official mbed build target for the SLSTK3400A Starter Kit for EFM32HG, using the GCC toolchain.
    mbed-target:efm32hg-stk, mbed-target:efm32hg_stk3400, mbed-official, efm32hg-stk
test-target-dep 0.0.2:
    Test Target Test Dependencies
    autopulated
frdm-k64f-armcc 2.0.0:
    Official mbed build target for the mbed frdm-k64f development board, using the armcc toolchain.
    mbed-target:k64f, mbed-official, mbed, k64f, frdm-k64f, armcc
stm32f429i-disco-gcc 0.0.20:
    Official mbed build target for the mbed stm32f429i-disco development board.
    mbed-target:discovery-f429zi, mbed-official, stm32f429i-disco, gcc
nordic-nrf51822-gcc 1.0.0:
    Official mbed build target for the mbed nrf51822 development board, using the armgcc toolchain.
    mbed-target:nrf51822, mbed-official, nrf51822, nordic, gcc
nrf51dk-gcc 1.0.0:
    Official mbed build target for the nRF51-DK 32KB platform.
    mbed-official, mbed-target:nrf51_dk, gcc
nordic-nrf51822-gcc-unofficial-fota 1.0.6:
    UNOfficial mbed build target for the mbed nrf51822 development board, using the armgcc toolchain. Nordic globs multiple targets in a repo which means you can't target and override them. This fork adds FOTA .dat and .zip generation for OTA DFU. Requires srecord(srec_cat) to be installed.
    mbed-target:nrf51822, mbed-unofficial, nrf51822, nordic, gcc
bbc-microbit-classic-gcc-exp 0.2.3:
    Official mbed build target for the mbed nrf51822 development board, using the armgcc toolchain. [EXPERIMENTAL TARGET]
    mbed-target:nrf51822, mbed-official, nrf51822, nordic, gcc
nordic-nrf51822-32k-gcc 0.1.3:
    Official mbed build target for the nrf51822 32KB chip.
    mbed-target:nrf51822, mbed-official, nrf51822, nordic, gcc
bash-3.2$

Ok, try a simple target:

bash-3.2$ yotta target mbed-gcc
bash-3.2$ yotta install mbed-time
info: get versions for mbed-gcc
info: download mbed-gcc@1.2.2 from the public module registry
info: get versions for minar-platform-mbed
info: download minar-platform-mbed@1.3.0 from the public module registry
bash-3.2$

However, where is this stuff installed?

Also, this assumes that we have a yotta compatible project, which I don't think we do.

mbed-time by hand

Edit Makefile:

CPP_SRCS = \
        ../mbed-time/source/time.cpp \
        ../eduk2.cpp

Running make fails:

../mbed-time/source/time.cpp:97:66: error: 'MINAR_PLATFORM_TIME_BASE' was not declared in this scope
         uint64_t seconds = (highTicks + ((uint64_t) lowTicks)) / MINAR_PLATFORM_TIME_BASE;

Searching

bash-3.2$ find . -type f | xargs grep MINAR_PLATFORM_TIME_BASE
Binary file ./BUILD/mbed-duktape2.elf matches
Binary file ./eduk2/c_eventloop.o matches
Binary file ./mbed-duktape2/mbed-time/source/time.o matches
./mbed-os/targets/TARGET_ONSEMI/TARGET_NCS36510/target_config.h:#define MINAR_PLATFORM_TIME_BASE 1000000
./mbed-time/source/time.cpp:        uint64_t seconds = (highTicks + ((uint64_t) lowTicks)) / MINAR_PLATFORM_TIME_BASE;
./mbed-time/source/time.cpp:        tvp->tv_usec = (uint64_t)(lowTicks % MINAR_PLATFORM_TIME_BASE) * 1000000 / MINAR_PLATFORM_TIME_BASE;
./mbed-time/yotta_modules/minar-platform-mbed/minar-platform/minar_platform_types.h:#ifndef YOTTA_CFG_MINAR_PLATFORM_TIME_BASE
./mbed-time/yotta_modules/minar-platform-mbed/minar-platform/minar_platform_types.h:#   define YOTTA_CFG_MINAR_PLATFORM_TIME_BASE     1000
./mbed-time/yotta_modules/minar-platform-mbed/minar-platform/minar_platform_types.h:#ifndef MINAR_PLATFORM_TIME_BASE
./mbed-time/yotta_modules/minar-platform-mbed/minar-platform/minar_platform_types.h:#   define MINAR_PLATFORM_TIME_BASE     YOTTA_CFG_MINAR_PLATFORM_TIME_BASE
./mbed-time/yotta_modules/minar-platform-mbed/minar-platform/minar_platform_types.h:    Time_Base = MINAR_PLATFORM_TIME_BASE,
./mbed-time/yotta_modules/minar-platform-mbed/source/mbed_platform.cpp:    return (total_active + total_sleep) / MINAR_PLATFORM_TIME_BASE;
./mbed-time/yotta_modules/minar-platform-mbed/source/mbed_platform.cpp:    return total_active / MINAR_PLATFORM_TIME_BASE;
bash-3.2$

Where is minar_platform_types.h included?

bash-3.2$ find . -type f | xargs grep minar_platform_types.h
./mbed-time/yotta_modules/minar-platform/minar-platform/minar_platform.h:#include "minar-platform/minar_platform_types.h"
bash-3.2$

Where is minar_platform.h included

bash-3.2$ find . -type f | xargs grep minar_platform.h
./mbed-time/yotta_modules/minar/minar/minar.h:#include "minar-platform/minar_platform.h"
./mbed-time/yotta_modules/minar/source/minar.cpp:#include "minar-platform/minar_platform.h"
./mbed-time/yotta_modules/minar-platform-mbed/source/mbed_platform.cpp:#include "minar-platform/minar_platform.h"
./mbed-time/yotta_modules/minar-platform-mbed/test/platform_test/main.cpp:#include "minar-platform/minar_platform.h"
bash-3.2$ find mbed-time -type f | xargs grep minar.h
mbed-time/yotta_modules/mbed-drivers/mbed-drivers/mbed.h:#include "minar/minar.h"
mbed-time/yotta_modules/mbed-drivers/source/I2C.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/mbed-drivers/source/retarget.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/mbed-drivers/source/SerialBase.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/mbed-drivers/source/SPI.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/mbed-drivers/source/v2/I2C.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/mbed-drivers/source/v2/I2CDetail.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/minar/minar-internal-headers/CallbackNode.h:#include "minar/minar.h"
mbed-time/yotta_modules/minar/source/minar.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/minar/test/complex_dispatch.cpp:#include "minar/minar.h"
mbed-time/yotta_modules/minar/test/dispatchtest.cpp:#include "minar/minar.h"
bash-3.2$

Ok, try this. Put mbed-time/yotta_modules/mbed-drivers/mbed-drivers in the include path before mbed-os so that we get a different mbed.h?

#Partial Solution Partial Solution

The solution is to use an mbed timer:

#ifdef __MBED__
#include "mbed.h"
#include "rtos.h"

extern "C" {

  Timer timer;
  int gettimeofday(struct timeval* globalTVP, void* tzp __attribute__((unused))) {

    globalTVP->tv_sec = time(NULL);

    // FIXME: https://docs.mbed.com/docs/mbed-os-api-reference/en/latest/APIs/tasks/Timer/                                                        
    // says:                                                                                                                                      
    // "Timers are based on 32-bit int microsecond counters, so they can                                                                          
    // only time up to a maximum of 2^31-1 microseconds (30                                                                                        
    // minutes). They are designed for times between microseconds and                                                                              
    // seconds. For longer times, you should consider the time() real                                                                              
    // time clock. "
                                                                                                                             
    globalTVP->tv_usec = timer.read_ms() - time(NULL) * 1000;

    fprintf(stderr, "%s:%d: gettimeofday(): time is %20ld sec, %20ld usec\n", __FILE__, __LINE__, globalTVP->tv_sec, globalTVP->tv_usec);
    return 0;
  }
}
#endif
#endif

...

int main(int argc, char *argv[]) {
  timer.start();
...
 
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Page last modified on April 13, 2017, at 12:00 am