CAD work going on here right now: https://github.com/akielaries/signalmesh_CAD/
signalmesh aims to be a digital synthesizer and open source hardware/software project
Don't forget to initialize submodules. ChibiOS is the RTOS used in this project
git submodule init
git submodule update
There are 5 boards active in the signalmesh circuit. Three of which are concerned with sound (ACM, APM, DSM) and the remaining two (UUM, TDM) are related to health, updating, and other housekeeping related items.
GWIN-9R Tangnano9k FPGA
- Responsible for sound generation
STM32H755
- Takes potentiometers, switches, etc. for sound parameters.
- Sends audio creation parameters to the ACM via UART.
- Receives the audio data from the FPGA via FMC.
- Outputs the audio data over the DAC.
STM32H753
- If external media is present and recording is enabled, the played data will be siphoned from the APM and to the external media.
STM32F446
- Able to update and switch firmware versions of all on board devices.
- Firmware packages can be made via `mkupdater.
STM32F334
- Collects telemetry throughout the system via CAN and collects debug messages via UART. Ready to display via two USB 2.0 ports respectively.
- Displays useful health/system information to one of the on board LCD screens.
I debug port access is simple and there are several examples through the code. Use
any USB -> Serial TTY converter and hook up the TX/RX pins to UART5 (SD5) on
the STM32. I use tio to view the debug port activity at 1,000,000 BAUD.
For development there is tools/gdbserver.py which is helpful for starting,
killing, listing, and monitoring GDB server sessions for all of our board
flavors.
$ ./tools/gdbserver.py --help
usage: gdbserver.py [-h] [-s] [-m] [-k] [-l]
options:
-h, --help show this help message and exit
-s, --start Start GDB servers for the defined devices
-m, --monitor Monitor and print st-util output to terminal
-k, --kill Kill all GDB servers
-l, --list List running GDB servers
When invoking the script notice I upload programs to two of the listed devices (H755, H753):
$ ./tools/gdbserver.py --start --monitor [5:20:09]
Starting GDB server for devices:
Launching st-util for STM32F334 on port 3344
Launching st-util for STM32F446 on port 4466
Launching st-util for STM32H755 on port 7555
[05:20:11][STM32F334] use serial 0668FF393355373043073856
[05:20:11][STM32F334] st-util
Launching st-util for STM32H753 on port 7533
[05:20:11][STM32F446] use serial 0668FF363154413043233728
[05:20:11][STM32F446] st-util
[05:20:11][STM32H755] use serial 0030004A3532510F31333430
[05:20:11][STM32H755] st-util
[05:20:11][STM32H753] use serial 003500323532511331333430
Launching st-util for STM32F103 on port 1033
[05:20:11][STM32H753] st-util
[05:20:11][STM32F103] use serial 18006000010000543931574E
[05:20:11][STM32F103] st-util
[05:20:11][STM32H755] 2025-06-17T05:20:11 INFO usb.c: Unable to match requested speed 1800 kHz, using 1000 kHz
[05:20:11][STM32H753] 2025-06-17T05:20:11 INFO usb.c: Unable to match requested speed 1800 kHz, using 1000 kHz
[05:20:11][STM32F446] 2025-06-17T05:20:11 INFO common.c: F446: 128 KiB SRAM, 512 KiB flash in at least 128 KiB pages.
[05:20:11][STM32F446] 2025-06-17T05:20:11 INFO gdb-server.c: Listening at *:4466...
[05:20:11][STM32H755] 2025-06-17T05:20:11 INFO common.c: H74x/H75x: 128 KiB SRAM, 2048 KiB flash in at least 128 KiB pages.
[05:20:11][STM32H755] 2025-06-17T05:20:11 INFO gdb-server.c: Listening at *:7555...
[05:20:11][STM32F334] 2025-06-17T05:20:11 INFO common.c: F334 medium density: 12 KiB SRAM, 64 KiB flash in at least 2 KiB pages.
[05:20:11][STM32F334] 2025-06-17T05:20:11 INFO gdb-server.c: Listening at *:3344...
[05:20:11][STM32H753] 2025-06-17T05:20:11 INFO common.c: H74x/H75x: 128 KiB SRAM, 2048 KiB flash in at least 128 KiB pages.
[05:20:11][STM32H753] 2025-06-17T05:20:11 INFO gdb-server.c: Listening at *:7533...
[05:20:11][STM32F103] 2025-06-17T05:20:11 WARN common.c: NRST is not connected
[05:20:11][STM32F103] 2025-06-17T05:20:11 INFO common.c: F1xx Medium-density: 20 KiB SRAM, 128 KiB flash in at least 1 KiB pages.
[05:20:11][STM32F103] 2025-06-17T05:20:11 INFO gdb-server.c: Listening at *:1033...
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO common.c: H74x/H75x: 128 KiB SRAM, 2048 KiB flash in at least 128 KiB pages.
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO gdb-server.c: Found 8 hw breakpoint registers
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO gdb-server.c: Chip clidr: 09000003, I-Cache: on, D-Cache: on
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO gdb-server.c: cache: LoUU: 1, LoC: 1, LoUIS: 0
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO gdb-server.c: cache: ctr: 8303c003, DminLine: 32 bytes, IminLine: 32 bytes
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO gdb-server.c: D-Cache L0: 2025-06-17T05:20:24 INFO gdb-server.c: f00fe019 LineSize: 8, ways: 4, sets: 128 (width: 12)
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO gdb-server.c: I-Cache L0: 2025-06-17T05:20:24 INFO gdb-server.c: f01fe009 LineSize: 8, ways: 2, sets: 256 (width: 13)
[05:20:24][STM32H755] 2025-06-17T05:20:24 INFO gdb-server.c: GDB connected.
[05:20:32][STM32H755] 2025-06-17T05:20:32 INFO common.c: H74x/H75x: 128 KiB SRAM, 2048 KiB flash in at least 128 KiB pages.
[05:20:32][STM32H755] 2025-06-17T05:20:32 INFO gdb-server.c: flash_erase: block 08000000 -> 20000
[05:20:32][STM32H755] 2025-06-17T05:20:32 INFO gdb-server.c: flash_erase: page 08000000
[05:20:33][STM32H755] 2025-06-17T05:20:33 INFO common.c: Starting Flash write for H7
[05:20:33][STM32H755] 2025-06-17T05:20:33 INFO gdb-server.c: flash_do: block 08000000 -> 20000
[05:20:33][STM32H755] 2025-06-17T05:20:33 INFO gdb-server.c: flash_do: page 08000000
[05:20:56][STM32H755] 2025-06-17T05:20:56 ERROR gdb-server.c: cannot recv: -2
[05:20:56][STM32H755] 2025-06-17T05:20:56 INFO gdb-server.c: Listening at *:7555...
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO common.c: H74x/H75x: 128 KiB SRAM, 2048 KiB flash in at least 128 KiB pages.
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO gdb-server.c: Found 8 hw breakpoint registers
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO gdb-server.c: Chip clidr: 09000003, I-Cache: on, D-Cache: on
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO gdb-server.c: cache: LoUU: 1, LoC: 1, LoUIS: 0
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO gdb-server.c: cache: ctr: 8303c003, DminLine: 32 bytes, IminLine: 32 bytes
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO gdb-server.c: D-Cache L0: 2025-06-17T05:20:56 INFO gdb-server.c: f00fe019 LineSize: 8, ways: 4, sets: 128 (width: 12)
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO gdb-server.c: I-Cache L0: 2025-06-17T05:20:56 INFO gdb-server.c: f01fe009 LineSize: 8, ways: 2, sets: 256 (width: 13)
[05:20:56][STM32H753] 2025-06-17T05:20:56 INFO gdb-server.c: GDB connected.
^C[05:21:29][STM32H753] Receive signal 2. Exiting...
And I get output from both