Add SYSTEM_HSE_MHZ definition to ACCI F405

[jesuslg123]

The board contains an external resonator

Pull-Request requirements

Mandatory Review for All New Flight Controllers

• All new flight controllers must undergo the Betaflight review process, regardless of whether they use an existing target.
• Manufacturers may reuse the same target for multiple designs, but each new hardware release must be reviewed before approval.

Hardware Compliance Requirements

• All hardware must adhere to the Manufacturer Design Guidelines.
• Poor hardware designs will not be accepted, as outlined in the Requirements for the Submission of New and Updated Targets.
• Adhere to the [Config Target Guidance] https://betaflight.com/docs/development/manufacturer/config-target-guidance
• To avoid costly issues and delays, we strongly encourage consulting with Betaflight developers early in your design process and providing schematics for review before producing hardware.

These measures help maintain high standards and ensure compatibility within the Betaflight ecosystem.

If you have any questions or need guidance, feel free to reach out to the Betaflight development team.

Housekeeping

• Pull-Request only from a custom branch, not master.
• Replace this text with details of your own.

Checklist (✓/✕, or y/n)

• passed Betaflight team's schematics review
• passed hardware samples testing
• follows guidelines
• follows connector standards
• flight tested
• comments/issues resolved

Summary by CodeRabbit

• Chores
  • Added new system configuration parameter to the defaults configuration.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Walkthrough

A single preprocessor macro definition SYSTEM_HSE_MHZ with value 8 was added to the ACCIF405 board configuration header file. This addition provides the missing HSE (High Speed External oscillator) frequency definition for the ACCIF405 target.

Changes

Cohort / File(s)	Summary
Board Configuration configs/ACCIF405/config.h	Added SYSTEM_HSE_MHZ macro definition set to 8 MHz, specifying the external crystal oscillator frequency for ACCIF405.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related issues

• Verify and add missing HSE defines to these targets #1008: Directly addresses the missing HSE define reported for ACCIF405 configuration.

Possibly related PRs

• Add system HSE to TAKERG4AIO #1015: Adds the same SYSTEM_HSE_MHZ macro to a different board config file.
• Add HSE to AIRBOTG4AIO #1016: Adds SYSTEM_HSE_MHZ to another board configuration header.
• Add HSE define to BETAFPVG473_V2 #1007: Applies the same preprocessor macro addition to a different device config file.

Suggested labels

Bugfix

Suggested reviewers

• nerdCopter
• ot0tot
• haslinghuis

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is largely incomplete. It provides only a brief explanation ('The board contains an external resonator') but retains the template boilerplate and leaves all checklist items unchecked without providing the required project-specific details.	Replace template boilerplate with actual PR details: explain the external resonator specs, describe hardware/testing status, and check/document relevant checklist items (schematics review, hardware testing, guidelines compliance, connector standards, flight testing, and resolution of any comments).

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: adding a SYSTEM_HSE_MHZ definition to the ACCI F405 board configuration file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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