Build Summary - STM32H7S78-DK Dual-Boot Project

Date: October 18, 2026
Status: ✅ SUCCESSFUL
Projects: Boot + Appli (TouchGFX + Audio)

Build Artifacts

Boot Project

Boot/TouchGFX/build/bin/
├── application.map    (200 KB)   - Linker map file
├── target.elf         (500 KB)   - Final ELF executable
├── target.hex         (69 KB)    - Intel HEX for flashing
├── intflash.elf       (448 MB)   - Internal flash ELF (debug)
└── intflash.hex       (69 KB)    - Internal flash HEX

Appli Project

Appli/TouchGFX/build/bin/
├── application.map    (3.5 MB)   - Linker map file
├── target.elf         (8.6 MB)   - Final ELF executable
├── target.hex         (8.3 MB)   - Intel HEX for flashing
├── intflash.elf       (6.1 MB)   - Internal flash ELF (debug)
└── intflash.hex       (1.3 MB)   - Internal flash HEX

Memory Usage (Appli)

Region	Used	Total	Usage
RAM	292,960 B	384 KB	74.50%
RAM_CMD	36,672 B	64 KB	55.96%
DTCM	8 KB	12 KB	66.67%
DTCM_RTOS	50,000 B	52 KB	93.90%
FLASH	484,800 B	2 MB	23.12%
FLASH_GFX	2,605,504 B	-	TouchGFX assets

Makefile Fixes

Problem Identified

The original makefiles used objects.tmp file-based linking which caused issues on macOS:

GNU Make $(file ...) function unreliable
Temporary file deleted before linking completed
Directory removal race condition

Solution Applied

Changed to direct object file listing in linker command:

# OLD (problematic)
@$(file >$(build_root_path)/objects.tmp) $(foreach F,$(object_files),$(file >>$(build_root_path)/objects.tmp,$F))
@$(linker) ... @$(build_root_path)/objects.tmp ...
@rm -f $(build_root_path)/objects.tmp

# NEW (working)
@$(linker) ... $(object_files) $(object_asm_files) -o $@ ...

Files Modified

gcc/makefile_boot (lines 225-235)
gcc/makefile_appli (lines 420-430)

Flashing

Flash Loader

Location: gcc/MX66UW1G45G_STM32H7S78-DK.stldr
Purpose: Program external flash (0x70000000) for Appli

Flashing Order (CRITICAL)

Boot first (internal flash only)
Appli second (with external FlashLoader)
Reset (press NRST button)

VS Code Tasks

See .vscode/README.md. Build All = Cmd+Shift+B; flashing tasks call gcc/flash.sh.

Verification Commands

# Verify build artifacts exist
ls -lh Boot/TouchGFX/build/bin/*.hex Appli/TouchGFX/build/bin/*.hex

# Verify HEX format (should show ASCII text)
file Boot/TouchGFX/build/bin/target.hex
file Appli/TouchGFX/build/bin/target.hex

# Test the board connection
gcc/flash.sh probe

Next Steps

Connect ST-Link V3 to the evaluation board
Run VS Code task: "Build + Flash All" (or gcc/flash.sh all)
The board is hard-reset automatically after flashing
Verify TouchGFX UI and audio processing

Documentation

File	Purpose
README.md	Project overview and debugging
.vscode/README.md	VS Code configuration
.vscode/flash_guide.md	Complete flashing instructions
AGENTS.md	Hardware and architecture details

Build Status: ✅ SUCCESSFUL
Ready for Flashing: ✅ YES
Last Updated: October 18, 2026

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