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New SDK version downgrades and tool paths likely change cache contents; verify cache key uses these version strings so restored cache matches new paths and avoids stale toolchains.
The added pip packages install into the runner; consider using a requirements file and pinning versions to ensure reproducible builds and avoid breakages from upstream changes.
Installer prefix changed to $HOME/ti/; confirm downstream references and PATH adjustments consistently point to $HOME/ti/ti-cgt-armllvm_4.0.3.LTS and that the directory actually gets created by the installer in this layout.
Revert the installer prefix for the ARM CLANG CGT to the version-specific path $HOME/ti/ti-cgt-armllvm_4.0.3.LTS. This ensures the toolchain is installed in the expected directory, preventing path mismatches in subsequent build steps.
Why: The suggestion correctly identifies that changing the installer prefix to $HOME/ti/ while all subsequent steps expect the toolchain at $HOME/ti/ti-cgt-armllvm_4.0.3.LTS is a critical risk that could break the entire build if the installer behavior is not as expected.
High
Use user-scoped pip installs
Add the --user flag to the pip3 install command to prevent potential permission errors and ensure a user-scoped installation. Also, add the user's local bin directory to the GITHUB_PATH.
Why: The suggestion correctly recommends using pip3 install --user as a best practice for robustness and to avoid potential permission issues in the CI environment, which is a valuable improvement for maintainability.
Low
General
Fail fast on missing compiler
Modify the toolchain verification step to explicitly fail if tiarmclang is not found. The current logic masks failures, allowing the workflow to proceed with a broken toolchain.
-test -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" && "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version || ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"+if ! test -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang"; then+ echo "ERROR: tiarmclang not found at expected path" >&2+ ls -l "$HOME/ti" || true+ ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS" || true+ exit 1+fi+"$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version
Apply / Chat
Suggestion importance[1-10]: 8
__
Why: The suggestion correctly points out that the || ls construct masks the exit code of the test, preventing the job from failing when the toolchain is missing. The proposed change correctly enforces a fail-fast behavior, which is critical for CI stability.
Medium
Organization best practice
Pin pip dependency versions
Pin versions for all pip packages to known-good releases to avoid non-deterministic CI failures.
Validate that the MD key MD-JVtW1V4WfA in the AM263Px SDK download URL is correct for version 10.02.00.15, as it is reused from a previous version and may be invalid.
# Install MCU+ SDK AM263Px 10.02.00.15
if [ ! -d "$HOME/ti/mcu_plus_sdk_am263px_10_02_00_15" ]; then
cd "$HOME/ti/downloads"
wget -q --retry-connrefused --waitretry=1 --tries=5 --timeout=30 \
- https://dr-download.ti.com/software-development/software-development-kit-sdk/MD-JVtW1V4WfA/10.02.00.15/mcu_plus_sdk_am263px_10_02_00_15-linux-x64-installer.run+ https://dr-download.ti.com/software-development/software-development-kit-sdk/MD-<correct_md_for_10_02_00_15>/10.02.00.15/mcu_plus_sdk_am263px_10_02_00_15-linux-x64-installer.run
chmod +x mcu_plus_sdk_am263px_10_02_00_15-linux-x64-installer.run
./mcu_plus_sdk_am263px_10_02_00_15-linux-x64-installer.run --mode unattended --prefix "$HOME/ti/"
fi
Suggestion importance[1-10]: 7
__
Why: The suggestion correctly identifies a potential issue where the download URL for the downgraded SDK might be incorrect because the MD key was not updated, which could cause the wget command to fail.
Medium
Organization best practice
Validate installer results and fail
Verify the installer created the expected directory and fail if not, so downstream steps don't proceed with a broken toolchain path.
Why:
Relevant best practice - Keep CI scripts robust and fail-fast: check installer success and validate expected directory layout after unattended installs.
Low
Parameterize SDK version strings
Centralize SDK versions in variables and reference them everywhere to keep URLs, file names, and paths consistent.
Update the chmod command to target the correct installer filename mcu_plus_sdk_am243x_11_00_00_15-linux-x64-installer.run to fix an execution permission error.
# Install MCU+ SDK AM243x 11.00.00.15
if [ ! -d "$HOME/ti/mcu_plus_sdk_am243x_11_00_00_15" ]; then
cd "$HOME/ti/downloads"
wget -q --retry-connrefused --waitretry=1 --tries=5 --timeout=30 \
https://dr-download.ti.com/software-development/software-development-kit-sdk/MD-ouHbHEm1PK/11.00.00.15/mcu_plus_sdk_am243x_11_00_00_15-linux-x64-installer.run
- chmod +x mcu_plus_sdk_am243x_11_01_00_17-linux-x64-installer.run+ chmod +x mcu_plus_sdk_am243x_11_00_00_15-linux-x64-installer.run
./mcu_plus_sdk_am243x_11_00_00_15-linux-x64-installer.run --mode unattended --prefix "$HOME/ti/"
fi
Suggestion importance[1-10]: 9
__
Why: The suggestion correctly identifies a copy-paste error in the chmod command that would cause the workflow to fail, making it a critical bug fix.
High
General
Make compiler check fail-fast
Refactor the compiler verification command to use an if/else block to provide clearer error messages and ensure the job fails explicitly if the compiler is not found or fails to execute.
-test -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" && "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version || ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"+if [ -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" ]; then+ "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version || { echo "ERROR: tiarmclang exists but failed to run"; exit 1; }+else+ echo "ERROR: tiarmclang not found at expected path"+ ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS" || true+ exit 1+fi
Suggestion importance[1-10]: 7
__
Why: The suggestion correctly points out that the || ls fallback can mask the true cause of failure and proposes a more robust check that fails the job explicitly.
Refactor the toolchain verification command to be more robust. Separate the file existence check from the version check, and provide explicit error messages with non-zero exit codes for each failure case.
-test -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" && "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version || ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"+if [ -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" ]; then+ "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version || { echo "tiarmclang found but --version failed"; exit 1; }+else+ echo "tiarmclang not found at $HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang"+ ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS" || true+ exit 1+fi
Suggestion importance[1-10]: 8
__
Why: The suggestion correctly identifies a flaw in the shell command logic that could mask failures and proposes a more robust, fail-fast approach with clearer error reporting, which is a critical improvement for a CI workflow.
Medium
General
Verify toolchain via binary presence
Improve the pre-installation check by verifying the existence of the tiarmclang binary instead of just its parent directory to prevent false positives and ensure the toolchain is correctly installed.
Why: The suggestion correctly points out that checking for a directory is not as reliable as checking for the executable, making the installation step more robust against partial or failed previous runs.
✅ Remove redundant build stepSuggestion Impact:The commit removed the explicit "make -C examples/LCD_interface ..." command from the workflow, aligning with the suggestion to avoid the redundant build step.
code diff:
@@ -191,7 +193,6 @@
- name: Build all via top-level makefile
run: |
- make -C examples/LCD_interface MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM243X DEVICE=am243x
make -j$(nproc) MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM243X DEVICE=am243x
make -j$(nproc) MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM261X DEVICE=am261x
make -j$(nproc) MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM263PX DEVICE=am263px
Remove the redundant build step for examples/LCD_interface, as it is already built by the subsequent top-level make command.
run: |
- make -C examples/LCD_interface MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM243X DEVICE=am243x
make -j$(nproc) MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM243X DEVICE=am243x
make -j$(nproc) MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM261X DEVICE=am261x
make -j$(nproc) MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM263PX DEVICE=am263px
[Suggestion processed]
Suggestion importance[1-10]: 7
__
Why: The suggestion correctly identifies a redundant build step added in the PR, which likely increases build time unnecessarily.
Medium
Organization best practice
✅ Reduce overly verbose loggingSuggestion Impact:The recursive directory listing was commented out and replaced with a conditional that prints tiarmclang --version if present, otherwise does a non-recursive ls, reducing log verbosity.
code diff:
- ls -lR "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"+ #ls -lR "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"+ test -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" && "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version || ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"+
Replace the recursive list with a targeted check (e.g., print version or key paths) to reduce noise and runtime.
Objective: Ensure all function/macro parameters are validated
Status: Passed
Missing Synchronization Between PRUs
Objective: Ensure proper coordination between multiple PRU cores
Status: Passed
Missing Watchdog Handling
Objective: Ensure watchdog is properly serviced to prevent system resets
Status: Passed
Non-Deterministic Code Paths
Objective: Ensure all code paths have predictable, bounded execution times for PRU assembly or C code
Status: Passed
Race Conditions in Shared Memory
Objective: Prevent data corruption from concurrent access to shared resources
Status: Passed
Register Corruption
Objective: Ensure register state is preserved across function calls and interrupts
Status: Passed
Unbounded Loops
Objective: Prevent infinite loops that could hang the PRU indefinitely unless explicitly marked via comment
Status: Passed
Uncontrolled GPIO States
Objective: Ensure GPIO pins are left in safe states under all conditions
Status: Passed
Undocumented Timing Requirements
Objective: Ensure all timing-critical code sections have documented cycle counts and execution times for PRU assembly or C code
Status: Passed
⚪
Hardcoded Magic Numbers
Objective: Ensure all numeric constants are properly defined and documented
Status: 🏷️ Hardcoded versions: Multiple hardcoded SDK and tool versions (e.g., 11_00_00_15, 10_02_00_15, 4.0.3.LTS) are added without clear documentation or centralized constants, which may qualify as magic numbers unless justified in broader CI context.
Objective: Ensure all critical operations have proper error handling
Status: 🏷️ Unchecked commands: New shell steps perform network installs and executions (pip3 install, wget, installer runs) without explicit error checks or retries beyond wget flags, risking silent step success masking partial failures.
Referred Code
libgtk2.0-0 libncurses5 libnss3 python3-pip \unzip xz-utils wget ca-certificatespip3 install pyserial xmodem tqdm pyelftools construct
- name: Restore toolchain/SDK cacheuses: actions/cache@v4with:
path: | $HOME/tikey: toolchain-mcu-sdk-${{ runner.os }}-v1-ccs20_3_1-pru2_3_3-am243x_11_01_00_17-am261x_10_02_00_15-am263px_11_00_00_19
- name: Install MCU+ SDKs, CCS, SYSCONFIG, TIARMCLANG and PRU CGT if missingrun: | set -e mkdir -p "$HOME/ti/downloads" cd "$HOME/ti" # Install CCS 20.3.1 if [ ! -d "$HOME/ti/ccs_10.3.1" ]; then cd "$HOME/ti/downloads" wget -q --retry-connrefused --waitretry=1 --tries=5 --timeout=30 \... (clipped 65 lines)
Silent Failures
Objective: Ensure all error conditions are properly reported and handled
Status: 🏷️ Silent install issues: Installer invocations and pip installs lack explicit error reporting or set -e safeguards, which may allow failures to go unnoticed in CI unless the shell step inherently fails on non-zero exits.
Referred Code
libgtk2.0-0 libncurses5 libnss3 python3-pip \unzip xz-utils wget ca-certificatespip3 install pyserial xmodem tqdm pyelftools construct
- name: Restore toolchain/SDK cacheuses: actions/cache@v4with:
path: | $HOME/tikey: toolchain-mcu-sdk-${{ runner.os }}-v1-ccs20_3_1-pru2_3_3-am243x_11_01_00_17-am261x_10_02_00_15-am263px_11_00_00_19
- name: Install MCU+ SDKs, CCS, SYSCONFIG, TIARMCLANG and PRU CGT if missingrun: | set -e mkdir -p "$HOME/ti/downloads" cd "$HOME/ti" # Install CCS 20.3.1 if [ ! -d "$HOME/ti/ccs_10.3.1" ]; then cd "$HOME/ti/downloads" wget -q --retry-connrefused --waitretry=1 --tries=5 --timeout=30 \... (clipped 65 lines)
Compliance status legend
🟢 - Fully Compliant
🟡 - Partial Compliant
🔴 - Not Compliant
⚪ - Requires Further Human Verification
🏷️ - Compliance label
Objective: Ensure all function/macro parameters are validated
Status: Passed
Missing Synchronization Between PRUs
Objective: Ensure proper coordination between multiple PRU cores
Status: Passed
Missing Watchdog Handling
Objective: Ensure watchdog is properly serviced to prevent system resets
Status: Passed
Non-Deterministic Code Paths
Objective: Ensure all code paths have predictable, bounded execution times for PRU assembly or C code
Status: Passed
Race Conditions in Shared Memory
Objective: Prevent data corruption from concurrent access to shared resources
Status: Passed
Register Corruption
Objective: Ensure register state is preserved across function calls and interrupts
Status: Passed
Unbounded Loops
Objective: Prevent infinite loops that could hang the PRU indefinitely unless explicitly marked via comment
Status: Passed
Uncontrolled GPIO States
Objective: Ensure GPIO pins are left in safe states under all conditions
Status: Passed
Undocumented Timing Requirements
Objective: Ensure all timing-critical code sections have documented cycle counts and execution times for PRU assembly or C code
Status: Passed
⚪
Hardcoded Magic Numbers
Objective: Ensure all numeric constants are properly defined and documented
Status: 🏷️ Magic numbers: The new build step uses an implicit default job count by omitting -j on the first make, and other steps use -j$(nproc); confirm that parallelism settings and any numeric literals like toolchain version directory names are intentionally hardcoded and documented for CI.
Objective: Ensure all critical operations have proper error handling
Status: 🏷️ Build errors: The added explicit make step for examples/LCD_interface lacks error handling or flags to fail fast beyond default shell behavior; verify the workflow halts and reports errors clearly if this step fails.
Referred Code
make -C examples/LCD_interface MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM243X DEVICE=am243xmake -j$(nproc) MCU_PLUS_SDK_PATH=$MCU_PLUS_SDK_PATH_AM243X DEVICE=am243x
Silent Failures
Objective: Ensure all error conditions are properly reported and handled
Status: 🏷️ Silent failures: The new diagnostic ls -lR and the added example build step do not explicitly log or validate outcomes beyond command exit codes; ensure failures are surfaced with clear messages or set -euo pipefail is in effect for this run block.
The reason will be displayed to describe this comment to others. Learn more.
Suggestion: Reduce overly verbose logging
Suggested change
ls -lR "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"
test -x "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" && "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS/bin/tiarmclang" --version || ls -l "$HOME/ti/ti-cgt-armllvm_4.0.3.LTS"
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PR Type
Enhancement, Bug fix
Description
Add Python dependencies (pyserial, xmodem, tqdm, pyelftools, construct) for mcelf build support
Fix ti-cgt-armllvm_4.0.3.LTS installation path to use
$HOME/ti/instead of nested directoryDowngrade MCU+ SDK AM243x from 11.01.00.17 to 11.00.00.15 for version alignment
Downgrade MCU+ SDK AM263Px from 11.00.00.19 to 10.02.00.15 for consistency
Improve toolchain verification with executable test and conditional diagnostics
Diagram Walkthrough
File Walkthrough
makefile.yml
CI workflow Python dependencies and SDK version alignment.github/workflows/makefile.yml
python3-pipto OS dependencies and installed Python packages(pyserial, xmodem, tqdm, pyelftools, construct) for mcelf build
$HOME/ti/ti-cgt-armllvm_4.0.3.LTSto$HOME/ti/with corresponding URL and path updates
with corresponding URL and path updates
test and conditional diagnostics
reflect new SDK versions