Building for Other Targets

You'll need to have installed the GNU Embedded Toolchain for ARM. If you haven't yet, see the Installing_ChipWhisperer guide, specifically the Installing ARM Toolchain section, for details.

Once you have a working compiler (check by typing 'arm-none-eabi-gcc' at the command line).

1. We want to use the existing SimpleSerial firmware as a base for our project, but we don't want to edit the existing firmware. Instead, we'll make a new project with a copy of this firmware. Copy the directory of the firmware you want to modify in the chipwhisperer/hardware/vicitims/firmware to a new folder. For example, if you want to modify the simpleserial-base firmware, copy the contents of the simpleserial-base folder to a new one. The name is arbitrary, but for this example, we'll call it simpleserial-base-lab1. You must keep it in the same directory, as it will reference other files within that directory for the build process.

2. Open a terminal with arm-none-eabi-gcc in the path. If using Windows the sidebar on the Installing_ChipWhisperer page

3. Change the terminal to the newly copied directory. For example:

   Windows:

   cd c:\chipwhisperer\hardware\victims\firmware\simpleserial-base-lab1

   Linux/macOS:

   cd chipwhisperer/hardware/victims/firmware/simpleserial-base-lab1

4. Then, run make to build the system. Make sure you specify which platform you're using as your target. For example, for the ChipWhisperer Lite target, run

   make PLATFORM=CWLITEARM CRYPTO_TARGET=TINYAES128C

   Which should have the following output:

   ...Bunch of lines removed...
   Linking: simpleserial-base-CWLITEARM.elf
   arm-none-eabi-gcc -mcpu=cortex-m4 -I. -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fmessage-length=0 -ffunction-sections -gdwarf-2 -DSS_VER=SS_VER_1_1 -DSTM32F303xC -DSTM32F3 -DSTM32 -DDEBUG -DHAL_TYPE=HAL_stm32f3 -DPLATFORM=CWLITEARM -DTINYAES128C -DF_CPU=7372800UL -Os -funsigned-char -funsigned-bitfields -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=objdir/simpleserial-base.o -I.././simpleserial/ -I.././hal -I.././hal/stm32f3 -I.././hal/stm32f3/CMSIS -I.././hal/stm32f3/CMSIS/core -I.././hal/stm32f3/CMSIS/device -I.././hal/stm32f4/Legacy -I.././crypto/ -I.././crypto/tiny-AES128-C -std=gnu99 -MMD -MP -MF .dep/simpleserial-base-CWLITEARM.elf.d objdir/simpleserial-base.o objdir/simpleserial.o objdir/stm32f3_hal.o objdir/stm32f3_hal_lowlevel.o objdir/stm32f3_sysmem.o objdir/aes.o objdir/aes-independant.o objdir/stm32f3_startup.o --output simpleserial-base-CWLITEARM.elf --specs=nano.specs -T .././hal/stm32f3/LinkerScript.ld -Wl,--gc-sections -lm -Wl,-Map=simpleserial-base-CWLITEARM.map,--cref   -lm
   .
   Creating load file for Flash: simpleserial-base-CWLITEARM.hex
   arm-none-eabi-objcopy -O ihex -R .eeprom -R .fuse -R .lock -R .signature simpleserial-base-CWLITEARM.elf simpleserial-base-CWLITEARM.hex
   .
   Creating load file for EEPROM: simpleserial-base-CWLITEARM.eep
   arm-none-eabi-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" \
           --change-section-lma .eeprom=0 --no-change-warnings -O ihex simpleserial-base-CWLITEARM.elf simpleserial-base-CWLITEARM.eep || exit 0
   .
   Creating Extended Listing: simpleserial-base-CWLITEARM.lss
   arm-none-eabi-objdump -h -S -z simpleserial-base-CWLITEARM.elf > simpleserial-base-CWLITEARM.lss
   .
   Creating Symbol Table: simpleserial-base-CWLITEARM.sym
   arm-none-eabi-nm -n simpleserial-base-CWLITEARM.elf > simpleserial-base-CWLITEARM.sym
   Size after:
      text    data     bss     dec     hex filename
      4588       8    1296    5892    1704 simpleserial-base-CWLITEARM.elf
   +--------------------------------------------------------
   + Built for platform CW-Lite Arm (STM32F3)
   +--------------------------------------------------------
   

Ensure that the "Built for platform ___" matches your target device.