Mecrisp Forth for the STM32WB

Interactive and extensible language. Built-in lexical analysis (tokenizer, parser), needs less than 32 KiB Flash and 4 KiB RAM.

The competitor is MicroPython, but it needs more than 250 KiB of Flash.

But what about uLisp? It is also small and self-contained.

• http://mecrisp.sourceforge.net/ Sourceforge, original project
• https://github.com/jjonethal/mecrisp-stellaris GIT repository, fork with more supported MCUs and dev kits.
• https://mecrisp-stellaris-folkdoc.sourceforge.io/ Mecrisp Stellaris Unofficial UserDoc
• https://jeelabs.org/docs/nodelib/jeelib/

CMSIS-SVD for STM32WB

SVD 2 Forth

• https://github.com/ralfdoering/cmsis-svd-fth
• https://mecrisp-stellaris-folkdoc.sourceforge.io/register-generator.html#svd2forth

Install the STM32CubeIDE and get the STM32WBxx_CM4.svd from the folder:

Version 1.6: stm32cubeide_1.1.0/plugins/com.st.stm32cube.ide.mcu.productdb.debug_1.1.0.201910081157/resources/cmsis/STMicroelectronics_CMSIS_SVD
Version 1.7: stm32cubeide_1.2.0/plugins/com.st.stm32cube.ide.mcu.productdb.debug_1.2.0.201912201802/resources/cmsis/STMicroelectronics_CMSIS_SVD

Install the Mecrisp-Stellaris and copy the STM32WBxx_CM4.svd into common/svd2forth-v3. Edit the Makefile

common/svd2forth-v3> diff Makefile Makefile~
5c5
< FOLDED_SVD            = STM32WBxx_CM4.svd
---
> FOLDED_SVD            = STM32L07x.svd

Edit the shell script raw-svd-clean.sh. Replace gsed with sed.

Generate the Forth and Assembler source files:

common/svd2forth-v3> make everything
common/svd2forth-v3> make mem

STM32WB Nucleo Board

https://www.st.com/en/evaluation-tools/p-nucleo-wb55.html

Schematic Nucleo Board MB1355

Schematic Nucleo Dongle MB1293

Build

Linux packages:

• cross-arm-binutils
• cross-arm-none-gcc9
• cross-arm-none-newlib-devel

• stlink
• stlink-gui
• stm32flash
• openocd

• STM32CubeProg
• STM32CubeMX

OpenOCD

OpenOCD 0.10.0 does not support STM32WB, therefore I built the OpenOCD from the sources.

$ git clone https://git.code.sf.net/p/openocd/code openocd-code 

But openSUSE' jimtcl Package conflicts with the configure script, to prevent this:

$ mv /usr/bin/jimsh /usr/bin/jimsh-unused

The usual configure/make/install:

$ ./configure
$ make
# make install

/usr/local/share/openocd/scripts/target/stm32wbx.cfg

/opt/STMicroelectronics/STM32Cube/STM32CubeProgrammer/bin/STM32_Programmer_CLI -c port=SWD -ob displ

Debug

• https://wiki.st.com/stm32mpu/wiki/GDB
• https://gctechspace.org/2014/09/getting-to-blinky-with-the-stm32-and-ubuntu-linux/
• https://www.openstm32.org/forumthread7625

-- Peter Schmid - 2019-12-29

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