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AM2434: How to set the 4-bit mode and 1-bit mode of sdio for AM2434 development board+BP3351 module

Bill Gates
Prodigy 30 points
Part Number: AM2434
Other Parts Discussed in Thread: SYSCONFIG

The system is FreeRTOS.Can the mode of sdio be set? Where can the 4-bit mode and 1-bit mode be set in the code.

  • 0
    TI__Mastermind 38585 points

    Hello, we have received your case and the investigation will take some time. Thank you for your patience.

  • 0
    TI__Mastermind 38585 points

    Hi,

    Yes, the sdio mode can be configured, and this is done through SysConfig.

    In SysConfig, navigate to the MMCSD section. By default, the driver selects the maximum supported speed and bus width automatically.

    To manually configure the bus mode:

    1. Open the MMCSD instance in SysConfig.

    2. Disable the option “Auto assign maximum speed”.

    3. Once this option is disabled, you will be able to explicitly select the bus width (1-bit or 4-bit mode) from the available configuration options.


    I’ve attached a screenshot for reference showing where this option can be found in SysConfig.

  • 0 回复 Lydia
    TI__Mastermind 38585 points

    Hi,

    The suggestions above regarding changing the bit positions seem acceptable.

    However, SDIO is not currently supported in the MCU+SDK. If the customer wants to achieve SDIO functionality, they will need to modify the MMCSD driver according to the SDIO protocol.