ARM Cortex-M

Introduction

This manual describes the porting details of the ERIKA Enterprise v3 kernel(s) for families of microcontrollers which integrate ARM Cortex-M CPUs.

Cortex-M features supported

The following are the main features of the currently implemented support:

• Development tools
  • GNU Arm Embedded Toolchain 4.9-2015-q3-update
  • Lauterbach TRACE32
• CPUs
  • ARM Cortex-M4
• Microcontrollers
  • ST STM32F4 Family
    • STM32F407VGT6 specific MCU
  • NXP i.MX8M Family
    • i.MX8MQ6 specific MCU
  • NXP S32K1xx Family
    • S32K144 specific MCU
    • S32K148 specific MCU
• Evaluation boards
  • ST STM32F4DISCOVERY
  • NXP MCIMX8M-EVK
  • NXP S32K144EVB
  • NXP S32K148EVB
• External Libraries
  • STM32F4 DSP and standard peripherals library
  • STM32Cube MCU Package for STM32F4 series
  • SDK for the i.MX 8MQuad Arm Cortex-M4 core
  • S32SDK provided by S32 Design Studio IDE for Arm based MCUs

Additionally, we are porting ERIKA3 also on a ARM Cortex-M7 CPU on ST 32F746GDISCOVERY board with STM32F746NG MCU.

In the next months, the public code will be delivered through the GitHub repository. In case of urgent need, please contact us.

Configuration and Programming

ERIKA Enterprise is configured through RT-Druid and an OIL file and some other properties.

The following sections describe the properties and OIL fields customized for ARM Cortex-M architecture.

GCC Compiler Path

It is possible to choose the path in three different ways:

• Specific environment variables: ARM_TOOLS
  • E.g.: ARM_TOOLS=C:\Program Files (x86)\GNU Tools ARM Embedded\4.9 2015q3
• RT-Druid Eclipse IDE Property.
• RT-Druid Configuration File Entry: preference_cortex_m__path_for_gcc_compiler
  • E.g.: preference_cortex_m__path_for_gcc_compiler=C:\Program Files (x86)\GNU Tools ARM Embedded\4.9 2015q3

Here is an example of RT-Druid configuration file.

S32 SDK Path

It is possible to choose the path in three different ways:

• Specific environment variables: S32_SDK_FILES
  • E.g.: S32_SDK_FILES=C:\NXP\S32DS_ARM_v2.0\S32DS\S32SDK_S32K14x_EAR_0.8.4
• RT-Druid Eclipse IDE Property.
• RT-Druid Configuration File Entry: preference_cortex_m__path_for_s32_sdk
  • E.g.: preference_cortex_m__path_for_s32_sdk=C:\NXP\S32DS_ARM_v2.0\S32DS\S32SDK_S32K14x_EAR_0.8.4

Here is an example of RT-Druid configuration file.

Lauterbach TRACE32 Path

It is possible to choose the path in two different ways:

• RT-Druid Eclipse IDE Property.
• RT-Druid Configuration File Entry: preference_lauterbach__path_for_trace32
  • E.g.: preference_lauterbach__path_for_trace32=C:\T32

Here is an example of RT-Druid configuration file.

Lauterbach Emulator Interface

It is possible to choose the path in two different ways:

• RT-Druid Eclipse IDE Property.
• RT-Druid Configuration File Entry: preference_lauterbach__emulator_usb_interface
  • E.g.: preference_lauterbach__emulator_usb_interface=true

Here is an example of RT-Druid configuration file.

CPU

CPU_DATA object must be set to CORTEX_M.

MODEL attribute of MCU_DATA supports for now the M4 value only.

Example of a CPU_DATA section:

   CPU_DATA = CORTEX_M{
     MODEL = M4;
     ...
   };

Tutorials

The following tutorials are available for this architecture:

• Cortex-M: NXP S32K1xx application build on Windows