Use lower SD card frequency for wider range of cards (fixes #19)

[davidhampgonsalves]

As per #19 this PR reduces the SD card max frequency to use SDMMC_FREQ_DEFAULT which has been seen to support a wider range of SD cards that might be used.

Summary by CodeRabbit

• New Features
  • Enhanced SD card performance by allowing for flexible maximum frequency settings, improving speed based on card capabilities.

[coderabbitai]

Walkthrough

The changes involve modifying the SDCard constructor in the SDCard.cpp file. The maximum frequency setting for the SD card interface has been updated from a fixed value of SDMMC_FREQ_52M to SDMMC_FREQ_DEFAULT. This change allows for greater flexibility in speed settings, enabling the use of higher speeds if supported by the SD card in use.

Changes

File	Change Summary
player/src/SDCard.cpp	Modified SDCard::SDCard constructor to change m_host.max_freq_khz from SDMMC_FREQ_52M to SDMMC_FREQ_DEFAULT.

Sequence Diagram(s)

(No sequence diagrams generated as the changes are too simple.)

Poem

In the land of bytes and bits,
A card spins fast, it never quits.
From fifty-two to default speed,
Our rabbit hearts now dance with glee!
Hopping high, we celebrate,
Flexibility is truly great! 🐇✨

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[coderabbitai]

Actionable comments posted: 0

Outside diff range and nitpick comments (1)

player/src/SDCard.cpp (1)

73-73: Approve the change but update the comment for clarity.

The change to use SDMMC_FREQ_DEFAULT as the maximum frequency aligns with the PR objective of enhancing compatibility with a wider range of SD cards. Using the default frequency allows the driver to negotiate the optimal frequency supported by both the host and the card, which is better than using a fixed high frequency that may not work with all cards.

However, the current comment is slightly misleading:

// A faster speed can be used if your card supports it

This suggests using a faster speed than the default, which seems to contradict the PR objective and the actual code change. Please update the comment to clarify that the default frequency is used for better compatibility, not for faster speed.

-// A faster speed can be used if your card supports it
+// Using the default frequency for better compatibility with various SD cards

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 8d994a4 and 7eb26bb.

Files selected for processing (1)

• player/src/SDCard.cpp (1 hunks)

[cgreening]

LGTM! Thank you!