# Photon and syncTime **URL:** \ **Category:** Troubleshooting\ **Created:** [May 24, 2015, 6:19pm UTC](https://community.particle.io/t/photon-and-synctime/12056 "2015-05-24T18:19:55Z")\ **Posts on this page:** 4\ **Page:** 2
**Author:** ![mdma](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/mdma/32/1924_2.png) [@mdma](https://community.particle.io/u/mdma)\ **Post date:** [July 22, 2015, 7:26pm UTC](https://community.particle.io/t/photon-and-synctime/12056/21 "2015-07-22T19:26:38Z")
Thanks. It looks as though the build was not successful since the CRC was not appended to the file. Please look for any error messages at the end of the build process. The way to know is to run `xxd user-part.bin` and inspect the last 4 bytes output. If they are `7856 3412` then the CRC has not been correctly written. ---
**Author:** ![neo12ibraheem](https://avatars.discourse-cdn.com/v4/letter/n/da6949/32.png) [@neo12ibraheem](https://community.particle.io/u/neo12ibraheem)\ **Post date:** [July 22, 2015, 7:37pm UTC](https://community.particle.io/t/photon-and-synctime/12056/22 "2015-07-22T19:37:33Z")
Thanks @mdma, This is the build output from NeatBeans: ``` C:/Particle/toolchain/Make/bin/make -C ../modules/photon/user-part make[1]: Entering directory `C:/Particle/firmware/modules/photon/user-part' C:/Particle/toolchain/Make/bin/make -C ../../../user make[2]: Entering directory `C:/Particle/firmware/user' Building file: src/application.cpp Invoking: ARM GCC CPP Compiler mkdir -p ../build/target/user/platform-6-m/src/src/ arm-none-eabi-gcc -DSTM32_DEVICE -DSTM32F2XX -DPLATFORM_THREADING=1 -DPLATFORM_ID=6 -DPLATFORM_NAME=photon -DUSBD_VID_SPARK=0x2B04 -DUSBD_PID_DFU=0xD006 -DUSBD_PID_CDC=0xC006 -DSPARK_PLATFORM -DINCLUDE_PLATFORM=1 -DPRODUCT_ID=6 -DPRODUCT_FIRMWARE_VERSION=65535 -DUSE_STDPERIPH_DRIVER -DDFU_BUILD_ENABLE -DSPARK_PLATFORM_NET=BCM9WCDUSI09 -fno-builtin-malloc -fno-builtin-free -fno-builtin-realloc -DUSER_FIRMWARE_IMAGE_SIZE=0x20000 -DUSER_FIRMWARE_IMAGE_LOCATION=0x80A0000 -DMODULAR_FIRMWARE=1 -DMODULE_VERSION=2 -DMODULE_FUNCTION=5 -DMODULE_INDEX=1 -DMODULE_DEPENDENCY=4,2,3 -DRELEASE_BUILD -I./inc -I../wiring/inc -I../system/inc -I../services/inc -I../communication/lib/tropicssl/include -I../communication/src -I../hal/inc -I../hal/shared -I../hal/src/photon -I../hal/src/stm32f2xx -I../hal/src/photon/api -I../platform/shared -I../platform/MCU/STM32F2xx/CMSIS/Include -I../platform/MCU/STM32F2xx/CMSIS/Device/ST/Include -I../platform/MCU/STM32F2xx/SPARK_Firmware_Driver/inc -I../platform/MCU/STM32F2xx/STM32_StdPeriph_Driver/inc -I../platform/MCU/STM32F2xx/STM32_USB_Device_Driver/inc -I../platform/MCU/STM32F2xx/STM32_USB_Host_Driver/inc -I../platform/MCU/STM32F2xx/STM32_USB_OTG_Driver/inc -I../dynalib/inc -I./src -I./libraries -I. -MD -MP -MF ../build/target/user/platform-6-m/src/src/application.o.d -ffunction-sections -fdata-sections -Wall -Wno-switch -Wno-error=deprecated-declarations -fmessage-length=0 -fno-strict-aliasing -DSPARK=1 -DSTART_DFU_FLASHER_SERIAL_SPEED=14400 -DSTART_YMODEM_FLASHER_SERIAL_SPEED=28800 -g3 -gdwarf-2 -Os -mcpu=cortex-m3 -mthumb -std=gnu++11 -fno-exceptions -fno-rtti -fcheck-new -c -o ../build/target/user/platform-6-m/src/src/application.o src/application.cpp Building target: ../build/target/user/platform-6-m/src/libuser.a Invoking: ARM GCC Archiver mkdir -p ../build/target/user/platform-6-m/src/ arm-none-eabi-ar -cr ../build/target/user/platform-6-m/src/libuser.a ../build/target/user/platform-6-m/src/src/application.o make[2]: Leaving directory `C:/Particle/firmware/user' C:/Particle/toolchain/Make/bin/make -C ../../../hal-dynalib make[2]: Entering directory `C:/Particle/firmware/hal-dynalib' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `C:/Particle/firmware/hal-dynalib' C:/Particle/toolchain/Make/bin/make -C ../../../services-dynalib make[2]: Entering directory `C:/Particle/firmware/services-dynalib' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `C:/Particle/firmware/services-dynalib' C:/Particle/toolchain/Make/bin/make -C ../../../system-dynalib make[2]: Entering directory `C:/Particle/firmware/system-dynalib' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `C:/Particle/firmware/system-dynalib' C:/Particle/toolchain/Make/bin/make -C ../../../rt-dynalib make[2]: Entering directory `C:/Particle/firmware/rt-dynalib' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `C:/Particle/firmware/rt-dynalib' C:/Particle/toolchain/Make/bin/make -C ../../../wiring make[2]: Entering directory `C:/Particle/firmware/wiring' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `C:/Particle/firmware/wiring' C:/Particle/toolchain/Make/bin/make -C ../../../communication-dynalib make[2]: Entering directory `C:/Particle/firmware/communication-dynalib' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `C:/Particle/firmware/communication-dynalib' C:/Particle/toolchain/Make/bin/make -C ../../../platform make[2]: Entering directory `C:/Particle/firmware/platform' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `C:/Particle/firmware/platform' Building target: ../../../build/target/user-part/platform-6-m/user-part.elf Invoking: ARM GCC C++ Linker mkdir -p ../../../build/target/user-part/platform-6-m/ arm-none-eabi-g++ -DSTM32_DEVICE -DSTM32F2XX -DPLATFORM_THREADING=1 -DPLATFORM_ID=6 -DPLATFORM_NAME=photon -DUSBD_VID_SPARK=0x2B04 -DUSBD_PID_DFU=0xD006 -DUSBD_PID_CDC=0xC006 -DINCLUDE_PLATFORM=1 -fno-builtin -DUSE_STDPERIPH_DRIVER -DDFU_BUILD_ENABLE -fno-builtin-malloc -fno-builtin-free -fno-builtin-realloc -DUSER_FIRMWARE_IMAGE_SIZE=0x20000 -DUSER_FIRMWARE_IMAGE_LOCATION=0x80A0000 -DMODULAR_FIRMWARE=1 -DMODULE_VERSION=2 -DMODULE_FUNCTION=5 -DMODULE_INDEX=1 -DMODULE_DEPENDENCY=4,2,3 -DRELEASE_BUILD -Werror -I./inc -I../../../user/inc -I../../../dynalib/inc -I../../../services/inc -I../../../hal/inc -I../../../hal/shared -I../../../hal/src/photon -I../../../hal/src/stm32f2xx -I../../../hal/src/photon/api -I../../../system/inc -I../../../rt-dynalib/inc -I../../../wiring/inc -I../../../modules/photon/system-part1/inc -I../../../platform/shared -I../../../platform/MCU/STM32F2xx/CMSIS/Include -I../../../platform/MCU/STM32F2xx/CMSIS/Device/ST/Include -I../../../platform/MCU/STM32F2xx/SPARK_Firmware_Driver/inc -I../../../platform/MCU/STM32F2xx/STM32_StdPeriph_Driver/inc -I../../../platform/MCU/STM32F2xx/STM32_USB_Device_Driver/inc -I../../../platform/MCU/STM32F2xx/STM32_USB_Host_Driver/inc -I../../../platform/MCU/STM32F2xx/STM32_USB_OTG_Driver/inc -I. -MD -MP -MF ../../../build/target/user-part/platform-6-m/user-part.elf.d -ffunction-sections -fdata-sections -Wall -Wno-switch -Wno-error=deprecated-declarations -fmessage-length=0 -fno-strict-aliasing -DSPARK=1 -DSTART_DFU_FLASHER_SERIAL_SPEED=14400 -DSTART_YMODEM_FLASHER_SERIAL_SPEED=28800 -g3 -gdwarf-2 -Os -mcpu=cortex-m3 -mthumb ../../../build/target/user-part/platform-6-m/src/module_info.o ../../../build/target/user-part/platform-6-m/src/user_export.o ../../../build/target/user-part/platform-6-m/src/user_module.o ../../../build/target/user-part/platform-6-m/src/newlib_stubs.o --output ../../../build/target/user-part/platform-6-m/user-part.elf -Wl,--whole-archive ../../../hal/src/photon/lib/STM32F2xx_Peripheral_Libraries.a -Wl,--no-whole-archive --specs=nano.specs -lnosys -L../../../modules/photon/system-part2 -L../../../modules/photon/system-part1 -L. -T./linker.ld -Wl,--defsym,USER_FIRMWARE_IMAGE_SIZE=0x20000 -Wl,--defsym,USER_FIRMWARE_IMAGE_LOCATION=0x80A0000 -Wl,-Map,../../../build/target/user-part/platform-6-m/user-part.map -L../../../build/target/user/platform-6-m/src/ -L../../../build/target/services-dynalib/arm/ -L../../../build/target/hal-dynalib/platform-6-m/ -L../../../build/target/system-dynalib/platform-6-m/ -L../../../build/target/rt-dynalib/platform-6-m/ -L../../../build/target/wiring/platform-6-m/ -L../../../build/target/communication-dynalib/platform-6-m/ -L../../../build/target/platform/platform-6-m/ -L../../../hal/src/photon/lib/ -Wl,--whole-archive -luser -lhal-dynalib -lservices-dynalib -lsystem-dynalib -lrt-dynalib -lwiring -lcommunication-dynalib -lplatform -Wl,--no-whole-archive -L../../../build/arm/linker -nostartfiles -Xlinker --gc-sections Invoking: ARM GNU Create Flash Image arm-none-eabi-objcopy -O binary ../../../build/target/user-part/platform-6-m/user-part.elf ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc if [-s ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc]; then \ head -c $((`stat --print %s ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc` - 38)) ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc > ../../../build/target/user-part/platform-6-m/user-part.bin.no_crc && \ tail -c 38 ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc > ../../../build/target/user-part/platform-6-m/user-part.bin.crc_block && \ test "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20280078563412" = `xxd -p -c 500 ../../../build/target/user-part/platform-6-m/user-part.bin.crc_block` && \ ../../../build/bin/win32/sha256sum ../../../build/target/user-part/platform-6-m/user-part.bin.no_crc | cut -c 1-65 | xxd -r -p | dd bs=1 of=../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc seek=$((`stat --print %s ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc` - 38)) conv=notrunc && \ head -c $((`stat --print %s ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc` - 4)) ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc > ../../../build/target/user-part/platform-6-m/user-part.bin.no_crc && \ crc32 ../../../build/target/user-part/platform-6-m/user-part.bin.no_crc | cut -c 1-10 | xxd -r -p | dd bs=1 of=../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc seek=$((`stat --print %s ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc` - 4)) conv=notrunc ;\ fi 32+0 records in 32+0 records out 32 bytes (32 B) copied, 0.00122994 s, 26.0 kB/s /usr/bin/sh: /cygdrive/c/Perl/bin/crc32: /usr/bin/perl: bad interpreter: Permission denied 0+0 records in 0+0 records out 0 bytes (0 B) copied, 0.000363784 s, 0.0 kB/s [! -f ../../../build/target/user-part/platform-6-m/user-part.bin] || rm ../../../build/target/user-part/platform-6-m/user-part.bin mv ../../../build/target/user-part/platform-6-m/user-part.bin.pre_crc ../../../build/target/user-part/platform-6-m/user-part.bin arm-none-eabi-objcopy -O ihex ../../../build/target/user-part/platform-6-m/user-part.elf ../../../build/target/user-part/platform-6-m/user-part.hex arm-none-eabi-size --format=berkeley ../../../build/target/user-part/platform-6-m/user-part.elf text data bss dec hex filename 4596 144 332 5072 13d0 ../../../build/target/user-part/platform-6-m/user-part.elf arm-none-eabi-objdump -h -S ../../../build/target/user-part/platform-6-m/user-part.elf > ../../../build/target/user-part/platform-6-m/user-part.lst make[1]: Leaving directory `C:/Particle/firmware/modules/photon/user-part' BUILD SUCCESSFUL (total time: 6s) ``` Which shows success, although I can see this, which also suggests CRC: ``` /usr/bin/sh: /cygdrive/c/Perl/bin/crc32: /usr/bin/perl: bad interpreter: Permission denied 0+0 records in 0+0 records out 0 bytes (0 B) copied, 0.000363784 s, 0.0 kB/s ``` ---
**Author:** ![mdma](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/mdma/32/1924_2.png) [@mdma](https://community.particle.io/u/mdma)\ **Post date:** [July 22, 2015, 7:50pm UTC](https://community.particle.io/t/photon-and-synctime/12056/23 "2015-07-22T19:50:06Z")
Yep, looks like crc is failing. I see it mentions cygwin in the path - I recommend installing MinGW and using the crc32 from there. ---
**Author:** ![Dave](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/dave/32/181_2.png) [@Dave](https://community.particle.io/u/Dave)\ **Post date:** [August 24, 2015, 8:29pm UTC](https://community.particle.io/t/photon-and-synctime/12056/24 "2015-08-24T20:29:21Z")
Opened an issue for this here -\> [https://github.com/spark/firmware/issues/581](https://github.com/spark/firmware/issues/581) Thanks, David [Previous page](https://community.particle.io/t/photon-and-synctime/12056.md?page=1)