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Compiler/TMS320F28379D: %f formatting does not work, the %g does

John Churchill
Intellectual 260 points
Part Number: TMS320F28379D

Tool/software: TI C/C++ Compiler

I am using the sprintf function in a C++ class function to format a string of text and when I try and use the %f formatting for a float, long double or anything the processor hangs in the sprintf routine or generates garbage for text. The %g format seems to work OK, but it has limited formatting. I am using CCS 7.4.0.00015.

Thanks

  • 0
    TI__Guru**** 244930 points

    Make sure you #include <stdio.h> .  Be certain the stack and heap are big enough.  Further details are in the article Tips For Using printf.

    Thanks and regards,

    -George

  • 0
    TI__Guru* 84225 points
    What value are you attempting to print?
  • 0 in reply to George Mock
    Intellectual 260 points
    Thanks George,

    Yes I have stdio.h included and I increased the stack size to 0x400 and set the heap to 0x400. No change in operation. I am not sure why the %g format would work and the %f doesn't if it was stack of heap?
    John
  • 0 in reply to Archaeologist
    Intellectual 260 points
    120 +/- 1. I have tried it as a float and a long double and neither works. The %g formatting works fine, but is limited in what formatting you can do with it.
  • 0 in reply to John Churchill
    TI__Guru* 84225 points
    I'm not aware of any known bugs that would cause this sort of behavior.

    What version of the compiler are you using? (It is not the same as the compiler version.)

    What is your exact printf format string?

    We're going to need to see a complete, compilable test case (including compiler options) that reproduces the error.
  • 0 in reply to Archaeologist
    TI__Guru**** 244930 points

    We cannot advance this issue without a test case.  Please submit one as described in the article How to Submit a Compiler Test Case.

    Thanks and regards,

    -George

  • 0 in reply to George Mock
    Intellectual 260 points

    Hi George,

    Sorry for the delay. I took the adc_soc_continuous_cpu01 demo and put in two sprintf() calls. the first uses %g and the second uses %f. the %g works and the %f hangs forever. This happens whether the source is C or C++.

    Thanks!

    Johnadc_soc_continuous_cpu01.pp.txt

  • 0 in reply to John Churchill
    Intellectual 260 points

    6138.Build Log.txt
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    **** Build of configuration CPU1_RAM for project adc_soc_continuous_cpu01 ****
    "C:\\ti\\ccsv7\\utils\\bin\\gmake" -k all
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Adc.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_Adc.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Adc.c"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Adc.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_CodeStartBranch.asm"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_CodeStartBranch.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_CodeStartBranch.asm"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_CodeStartBranch.asm"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_DefaultISR.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_DefaultISR.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_DefaultISR.c"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_DefaultISR.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/source/F2837xD_GlobalVariableDefs.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_GlobalVariableDefs.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/source/F2837xD_GlobalVariableDefs.c"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/source/F2837xD_GlobalVariableDefs.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Gpio.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_Gpio.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Gpio.c"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Gpio.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Ipc.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_Ipc.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Ipc.c"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_Ipc.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_PieCtrl.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_PieCtrl.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_PieCtrl.c"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_PieCtrl.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_PieVect.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_PieVect.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_PieVect.c"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_PieVect.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_SysCtrl.c"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_SysCtrl.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_SysCtrl.c"
    "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_SysCtrl.c", line 828 (col. 47): advice #2614-D: (Performance) Use --fp_mode=relaxed to enable TMU hardware support for FP division.
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_SysCtrl.c"'
    'Building file: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_usDelay.asm"'
    'Invoking: C2000 Compiler'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --include_path="C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/include" --include_path="C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/include" --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number --preproc_with_compile --preproc_dependency="F2837xD_usDelay.d_raw" "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_usDelay.asm"
    'Finished building: "C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/source/F2837xD_usDelay.asm"'
    'Building target: "adc_soc_continuous_cpu01.out"'
    'Invoking: C2000 Linker'
    "C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/bin/cl2000" -v28 -ml -mt --cla_support=cla1 --float_support=fpu32 --tmu_support=tmu0 --vcu_support=vcu2 --define=CPU1 -g --diag_suppress=1311 --diag_warning=225 --display_error_number -z -m"adc_soc_continuous_cpu01.map" --stack_size=0x100 --warn_sections -i"C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/lib" -i"C:/ti/ccsv7/tools/compiler/ti-cgt-c2000_16.9.6.LTS/include" -i"C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/common/cmd" -i"C:/ti/C2000Ware_1_00_03_00_Software/device_support/f2837xd/headers/cmd" --reread_libs --display_error_number --xml_link_info="adc_soc_continuous_cpu01_linkInfo.xml" --rom_model -o "adc_soc_continuous_cpu01.out" "./F2837xD_Adc.obj" "./F2837xD_CodeStartBranch.obj" "./F2837xD_DefaultISR.obj" "./F2837xD_GlobalVariableDefs.obj" "./F2837xD_Gpio.obj" "./F2837xD_Ipc.obj" "./F2837xD_PieCtrl.obj" "./F2837xD_PieVect.obj" "./F2837xD_SysCtrl.obj" "./F2837xD_usDelay.obj" "./adc_soc_continuous_cpu01.obj" "../2837xD_RAM_lnk_cpu1.cmd" -lrts2800_fpu32.lib -lF2837xD_Headers_nonBIOS_cpu1.cmd -llibc.a
    <Linking>
    'Finished building target: "adc_soc_continuous_cpu01.out"'
    **** Build Finished ****
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    Forgot to send the other information required!

    ******************************************************************************

                TMS320C2000 Linker PC v16.9.6                    

    ******************************************************************************

    >> Linked Mon Mar 19 14:17:19 2018

  • 0 in reply to John Churchill
    TI__Guru**** 244930 points

    John Churchill said:
    I increased the stack size to 0x400

    That's not enough.  I created a small program that calls sprintf and used call_graph from the cg_xml package to determine how much stack is required.  It says 0x49e words of stack are used.  To be safe, you should allocate more than that.

    John Churchill said:
    I am not sure why the %g format would work and the %f doesn't

    Given what we know now, it is harder to explain why %g works than it is to explain why %f fails.

    Thanks and regards,

    -George

  • 0 in reply to George Mock
    Intellectual 260 points
    I set the stack size to 0x800 and it works now! Thanks George.