SDK 14 buttonless dfu not building with gcc

RE: SDK 14 buttonless dfu not building with gcc

Ingo — Wed, 15 Jan 2020 16:34:53 GMT

The following solution works for us with GCC 5.4.3

__ASM __volatile                                            \
(                                                           \
    "  movs.w r12,  %0    \n"                               \
    "  svc %1             \n"                               \
    "  bx lr              \n"                               \
    "  .ltorg"                                              \
    : /* output */                                          \
    : /* input */                                           \
        "I"(svci_num),                                      \
        "I"(GCC_CAST_CPP NRF_SVCI_SVC_NUM)                  \
    : /* clobbers */                                        \
        "r12"                                               \
);

RE: SDK 14 buttonless dfu not building with gcc

parco — Fri, 08 Jun 2018 20:43:01 GMT

I was seeing this on 4.9.3 as well, had to upgrade all the way using this: launchpad.net/.../ppa

RE: SDK 14 buttonless dfu not building with gcc

bjorn-spockeli — Thu, 18 Jan 2018 09:56:54 GMT

I am afraid that I am unfamiliar with the Embitz IDE. My recommendation would be to go for Segger Embedded Studio which is fully supported in our SDK with lots of example. You get afree perpetual license for SES for development on Nordic ICs. In addition to that i would point out that you also get the following features:

SES is cross-platform, i.e. runson Windows, Linux and macOS.
SES allows you to view logging information sent using Seggers RTT( one of the two logging backends we support in our SDK) directly in the SES IDE, rather than having to open a RTT terminal window.
SES's Integrated Debugger with advanced debug information windows and direct J-Link integration.

RE: SDK 14 buttonless dfu not building with gcc

gordie — Wed, 17 Jan 2018 21:30:49 GMT

Any luck figuring out how to get it working in Embitz?

RE: SDK 14 buttonless dfu not building with gcc

gordie — Tue, 16 Jan 2018 10:19:28 GMT

Thanks for the fast reply. I am using Embitz IDE V1.00. see here https://www.embitz.org/

RE: SDK 14 buttonless dfu not building with gcc

bjorn-spockeli — Tue, 16 Jan 2018 08:46:47 GMT

Which IDE are you using?

RE: SDK 14 buttonless dfu not building with gcc

gordie — Tue, 16 Jan 2018 08:09:44 GMT

Thanks, one more question, once I have downloaded and installed it - how do i select it from within my IDE? is it just something you select in project options?

RE: SDK 14 buttonless dfu not building with gcc

bjorn-spockeli — Tue, 16 Jan 2018 07:14:25 GMT

You can find the v4.9.3 here.

RE: SDK 14 buttonless dfu not building with gcc

gordie — Tue, 16 Jan 2018 03:52:40 GMT

Hi Guys, Was wondering if anyone here could help me out. I googled "gcc-arm-none-eabi-7-2017-q4-major-win32" and downloaded the installer and installed it. Still does not compile, am I missing something - like maybe a setting?(I am using EmBitz V1.00 IDE). Lastly, How do I downgrade to GCC v4.9.3?

RE: SDK 14 buttonless dfu not building with gcc

Andy Caruso — Thu, 07 Dec 2017 19:21:06 GMT

Is there a version of the SDK planned that will work with gcc 5.3.1 or later? We had to upgrade our codebase for a different reason and are now unable to use this DFU application.

If there's no update planned that will upgrade the supported gcc version, are there any other ideas for a solution (since the one above seems to have issues)?

RE: SDK 14 buttonless dfu not building with gcc

bjorn-spockeli — Thu, 07 Dec 2017 07:57:10 GMT

@oamidi: Thanks for letting us know. The SDK is production tested using GCC v4.9.3, so that is the recommended solution.

RE: SDK 14 buttonless dfu not building with gcc

Omead — Wed, 06 Dec 2017 16:42:24 GMT

Doing this, however, breaks the buttonless DFU application template's operation. Downgrading gcc to 4.9 seems to produce the correct code.

RE: SDK 14 buttonless dfu not building with gcc

bjorn-spockeli — Fri, 22 Sep 2017 13:29:51 GMT

The compiler is complaining about the following function in nrf_svci.h

   #define SVCI_DECL(svci_num, return_type, function_name, ...)        \
        _Pragma("GCC diagnostic push")                                  \
        _Pragma("GCC diagnostic ignored \"-Wreturn-type\"")             \
        __attribute__((naked, unused))                                  \
        static return_type svci_ ## function_name(__VA_ARGS__)          \
        {                                                               \
            /* Do the SuperVisor call by using svc instruction with     \
               R12 containing the SVCI number */                        \
            __ASM __volatile                                            \
            (                                                           \
                "  ldr.w r12, =%0     \n"                               \
                "  svc %1             \n"                               \
                "  bx lr              \n"                               \
                "  .ltorg"                                              \
                : /* output */                                          \
                : /* input */                                           \
                    "X"(svci_num),                                      \
                    "I"(GCC_CAST_CPP NRF_SVCI_SVC_NUM)                  \
                : /* clobbers */                                        \
                    "r12"                                               \
            );                                                          \
        }                                                               \
        _Pragma("GCC diagnostic pop")

Specifically, its the optional instruction width specifier .w, which forces the LDR to generate a 32-bit instruction in Thumb-2 code, according to this Stack Overflow post. Removing this optional specifier, i.e. leaving it t the compiler to decide the instruction width seems to do the trick ,i.e.

"  ldr r12, =%0     \n"                               \

RE: SDK 14 buttonless dfu not building with gcc

idelsink — Thu, 21 Sep 2017 19:41:35 GMT

Well the issue is still not solved, because just simply downgrading it is not a solve for any problem.

RE: SDK 14 buttonless dfu not building with gcc

jithin m das — Thu, 21 Sep 2017 09:26:22 GMT

Downgrading arm gcc from 5.4.1 to 4.9.3 solved the issue.