STM's NUCLEO-H743ZI

If you need a really fast MCU (ARM Cortex M7 @ 550 MHz) then the MecrispCubeH743 could be the right Mecrisp Forth for you.

Instant real-time programming with Forth.

Arduino Portenta H7?

Sources on GitHub (H743 branch on Mecrisp-Cube)

Features

• 128? KiB RAM dictionary
• 1024? KiB Flash dictionary
• Forth as CMSIS-RTOS thread. CMSIS-RTOS API to use FreeRTOS from Forth.
• Buffered terminal I/O (5 KiB buffer for UART Rx). Interrupt driven and RTOS aware, key and emit block the calling thread. USART3: D0 RX, D1 TX
• USB-CDC for serial communication via USB. Redirect console I/O like cdc-emit, cdc-key
• microSD and internal Flash mass storage for blocks and FAT filesystem.
  • Internal Flash drive 0:, 512 KiB
  • microSD drive 1:
  • Filesystem API
  • UNIX like Shell commands
• Digital and analog pins
  • LEDs: LED1 (red) D13, NeoPixel D8 (RGB)
  • Digital port pins: D0 to D15 (D8 NeoPixel and D7 fake, internal)
  • Analog port pins: A0 to A6 (A6 battery voltage, internal)
  • PWM:
    • TIM3: D5, D6
    • TIM4: D9, D10, D14, D15
  • Input capture TIM2: A1,
  • Output compare TIM2: D0, D1
  • EXTI: D11, D12, D13
• SPI: D2 SCK, D3 MISO, D4 MOSI (e.g. for display, memory)
• I2C: D14 SDA, D15 SCL (external peripherals Qwiic / STEMMA QT port)
• vi Editor origin in BusyBox tiny vi. Workflow development: begin Edit EVALUATE while SaveFile repeat
• Real Time Clock (32 bit UNIX time stamp, valid times are from 1.1.2000 to 31.12.2099 because of the STM32WB RTC peripheral) time!, time@, and .time (YYYY-MM-DDTHH:MM:SS ISO 8601).

• OLED FeatherWing 128x32
  • Switches: SW1 (button A, D9), SW2 (button B, D6), SW3 (button C, D5)
  • I2C: D14 SDA, D15 SCL

• Markdown manual pages

For more BSP details see BoardSupportPackageH743.

Getting Started

These instructions will get you a copy of the project up and running on your local machine (STM's NUCLEO-H743ZI board) for development and testing purposes.

Prerequisites

• STM's NUCLEO-H743ZI
• Terminal emulator application for PC, e.g.:
  • PuTTY - Windows and Linux
  • Tera Term - Windows
  • Realterm - Windows
  • minicom, microcom, screen - Linux
  • Use the built in Eclipse console (but no LF)

Flash the Mecrisp-Cube binary (MecrispCubeF405.bin) or the util-binary (MecrispCubeF405Util.bin) to the Feather Board.

1. Connect the BOOTP (BO Pin) to 3.3V
2. Connect the Feather Board USB to the PC
3. Program the binary with the STMCubeProgrammer
4. Disconnect the BOOTP (BO Pin)
5. Reset or power cycle the Feather board

Start the terminal emulator application on the PC. Check for the serial communication port (e.g. for Linux /dev/ttyACM0). I set the putty terminal configuration to

• Implicit CR in every LF
• Local echo: Auto
• Local line editing: Auto
• Keyboard Backspace: Control-H
• Keyboard Function: Keys VT100
• Remote character set: CP850

Mecrisp-Stellaris RA 2.5.4 by Matthias Koch.

Mecrisp-Cube 1.4.3 for STM32F405, 31/768 KiB RAM/FLASH dictionary (C) 2021 peter@spyr.ch
  * Firmware Package STM32Cube F4 V1.26.0, USB-CDC (C) 2021 STMicroelectronics
  * CMSIS-RTOS V2 FreeRTOS wrapper, FreeRTOS Kernel V10.3.1 (C) 2020 Amazon.com
  * FatFs for serial flash and microSD - Generic FAT fs module  R0.12c (C) 2017 ChaN
  * tiny vi - part of BusyBox (C) 2000, 2001 Sterling Huxley

include 0:/etc/rc.local

23 5 / .[CR] 4  ok.
: hello ." World" ;[CR]  ok.
hello[CR] World ok.

Additional Tools and Local Filesystem

sdcard

The directory should look like this:

ls -l 1:[CR]
drw-         0 2021-04-18T18:12:38 boot
drw-         0 2021-03-21T18:47:52 etc
drw-         0 2021-03-21T18:47:54 fsr
drw-         0 2021-03-21T18:47:54 home
drw-         0 2021-03-21T18:47:56 man
-rwa      7219 2021-01-08T19:42:36 README.md
ok.

You can use the local CLI commands like mkfs, mkdir and cp to create a filesystem on the serial flash and fill it with files and folders. But this is tedious job because I haven't yet implemented a recursive copy for MecrispCube. But there is prepared disk image (for details see MicroSdBlocks#Serial_Flash) on microSD and the tool dd. You can copy the disk image to the drive 0: (this takes about 2 Minutes):

dd 1:/boot/fd-2MiB.img 0:[CR]
 ok.
mount 0:[CR]
 ok.
ls 0:[CR]
man                     fsr                     README.md               boot
etc                     home
 ok.

The Mecrisp have some tools bundled in its distribution e.g. assembler, disassembler, dump, float. I put those tools and some more into the folder /fsr. With the "init.fs script" I compile my favorite ones into the flash directory:

compiletoflash[CR]  ok.
include /etc/init.fs[CR]
init.fs Loading started
RAM Dictionary: 392991 KiB
utils.fs loading ...
conditional.fs loading ...
dump.fs loading ...
disassembler-m3.fs loading ...
float.fs loading ...
threads.fs loading ...
RAM Dictionary: 392981 KiB
init.fs finished  ok.

For example, the word disassember is available now:

see dump[CR]
080405F0: B500  push { lr }
080405F2: F7C2  bl  08002A3E  --> cr
080405F4: FA24
080405F6: CF08  ldmia r7 { r3 }
080405F8: F013  ands r2 r3 #F
080405FA: 020F
080405FC: F847  str r3 [ r7 #-4 ]!
080405FE: 3D04
08040600: 2A00  cmp r2 #0
08040602: D000  beq 08040606
08040604: 3610  adds r6 #10
08040606: CF08  ldmia r7 { r3 }
08040608: F847  str r6 [ r7 #-4 ]!

Installing

A step by step series of examples that tell you how to get a development env running

Install the IDE STM32CubeIDE, it is Eclipse and GCC based. STM32CubeMX is included in the IDE, you need a stand alone installation only if you do not want to use the STM32CubeIDE.

Get the sources from github:

psi@homer:~> git clone --branch F405 https://github.com/spyren/Mecrisp-Cube
Klone nach 'Mecrisp-Cube' ...
remote: Enumerating objects: 1157, done.
remote: Counting objects: 100% (1157/1157), done.
remote: Compressing objects: 100% (620/620), done.
remote: Total 3183 (delta 720), reused 934 (delta 525), pack-reused 2026
Empfange Objekte: 100% (3183/3183), 41.60 MiB | 6.96 MiB/s, Fertig.
Löse Unterschiede auf: 100% (2100/2100), Fertig.

Import the project into the IDE:

File -> Import -> General -> Existing Projects into Workspace -> Select root directory
Copy project into workspace
Browse to Mecrisp-Cube directory

Generate code from the STM32CubeMX MecrispCubeF405.ioc file:

Project -> Generate Code 

Restore changed source files

$ git status
{list of changed files}
$ git restore {files to restore} 

Select the Build Configuration (Debug if you want to debug the project) and Build the project:

Project -> Build Configurations -> Set Active -> Debug/Release 
Project -> Build Project