This isn't official library that compatible with GCC compiler.
The following MCU's are now supported by gcc:
- MDR1901VC1T (not tested)
- MDR1986VE1T
- MDR1986VE3 (not tested)
- MDR1986BE4 (not tested)
- MDR1986VE9x
>>>Link to a recomended GCC compiler version<<<
>>>Link to newest CMSIS<<< (The current package contain an old version of CMSIS)
To see examples for using gcc toolchain look at /usr/share/gcc-arm-embedded/samples (on Linux).
INC = inc
std-per-lib/CMSIS/CM3/CoreSupport
std-per-lib/CMSIS/CM3/DeviceSupport/MDR32F9Qx/inc
std-per-lib/CMSIS/CM3/DeviceSupport/MDR32F9Qx/startup
std-per-lib/MDR32F9Qx_StdPeriph_Driver/inc
std-per-lib/MDR32F9Qx_StdPeriph_Driver/inc/USB_Library
SRC = example.c
std-per-lib/CMSIS/CM3/DeviceSupport/MDR32F9Qx/startup/gcc/startup_MDR32F9Qx.S
std-per-lib/CMSIS/CM3/DeviceSupport/MDR32F9Qx/startup/system_MDR32F9Qx.c
std-per-lib/MDR32F9Qx_StdPeriph_Driver/src/MDR32F9Qx_port.c
# another peripheral modules
CFLAGS = -mcpu=cortex-m3 -mthumb -O2 -ffunction-sections -fdata-sections -Wall -Wextra -Wshadow -Wredundant-decls -Wno-missing-field-initializers -Wconversion -Wno-packed-bitfield-compat -pipe
For each src in SRC list call:
arm-none-eabi-gcc ${CFLAGS} -DUSE_MDR1986VE9x -D__STARTUP_CLEAR_BSS -D__START=main -I${INC} -c ${src} -o ${src}.o
Link (OBJ it is a list of all ${src}.o):
arm-none-eabi-gcc ${CFLAGS} -T std-per-lib/CMSIS/CM3/DeviceSupport/MDR32F9Qx/startup/gcc/MDR32F9Qx.ld --specs=nosys.specs -Wl,--gc-sections -ffreestanding -nostartfiles -Wl,-Map=example.map ${OBJ} -o example.elf
For each src in SRC call:
arm-none-eabi-g++ ${CFLAGS} -fno-rtti -fno-exceptions -fno-threadsafe-statics -DUSE_MDR1986VE9x -D__STARTUP_CLEAR_BSS -I${INC} -c ${src} -o ${src}.o
Link:
arm-none-eabi-g++ ${CFLAGS} -T std-per-lib/CMSIS/CM3/DeviceSupport/MDR32F9Qx/startup/gcc/MDR32F9Qx.ld --specs=nosys.specs --specs=nano.specs -Wl,--gc-sections -ffreestanding -Wl,-Map=example.map ${OBJ} -o example.elf
Selection a type of C/C++ standard library:
--specs=nano.specs - use newlib-nano library (recomended for embedded systems). Without this flag - used the common library.
With semihosting: --specs=rdimon.specs
Without semihosting: --specs=nosys.specs
Show compiled file sections size after building (additional linker flag): -Wl,--print-memory-usage.
Example:
Memory region Used Size Region Size %age Used
FLASH: 29760 B 128 KB 22.71%
RAM: 2312 B 32 KB 7.06%
Get a hex file:
arm-none-eabi-objcopy -O ihex example.elf example.hex
Get a bin file:
arm-none-eabi-objcopy -O binary example.elf example.bin
Instead cflag -O2 set -O0 -ggdb3.
Select MCU architecture
Instead cflag -mcpu=cortex-m3 use:
-mcpu=cortex-m0 # MDR1986BE4
-mcpu=cortex-m1 # MDR1986VE1T, MDR1986VE3
-mcpu=cortex-m3 # MDR1986VE9x, MDR1901VC1T
Instead compiler definition -DUSE_MDR1986VE9x use:
-DUSE_MDR1901VC1T # MDR1901VC1T
-DUSE_MDR1986VE1T # MDR1986VE1T
-DUSE_MDR1986VE3 # MDR1986VE3
-DUSE_MDR1986BE4 # MDR1986BE4
-DUSE_MDR1986VE9x # MDR1986VE9x
INC, SRC and ld script change in accordance selected MCU.
Comment for pseudocode
- instead
${VAR}paste relevantVARlist