version: "1.0.0" name: sf32lb57-add-part-number description: Add a new SF32LB57X chip part number to the SiFli SDK. Use this skill when the user wants to add a new chip part number, 添加新料号, or add a new part number. Guides through Kconfig_soc.sf32lb57x, Kconfig_soc.sf32lb57x.v1 and a new soc/sf32lb57x/Kconfig.<part> file with the correct MPI mode, pinmap mode, package type, and memory size settings.

Add New SF32LB57X Part Number

Adds a new chip part number to the SF32LB57X family in the SiFli SDK.

Every per-part-number default lives in one file per part number under soc/sf32lb57x/. customer/boards/Kconfig_drv and Kconfig_soc.sf32lb57x.common hold only part-number-independent fallbacks and must not be edited when adding a part number.

Before You Start

IMPORTANT: You MUST ask the user for ALL of the following information before making any changes. Do NOT infer or guess any values from the part number. If the user forgets to provide any of these, ask them explicitly.

Collect the following information from the user:

1. Part number string (e.g., SF32LB573UB7N6)
2. Package type: QFN68, QFN80, or BGA112 — can be inferred from the part number's package letter (see table below), but still confirm with the user
3. MPI1 (PSRAM1) settings:

• Primary supplier (pkg_type0) MPI mode and pinmap mode — ask for both, do not assume defaults
• Secondary supplier (pkg_type1) MPI mode and pinmap mode (if applicable)
• Memory size (MB)

1. MPI2 (PSRAM2) settings:

• Primary supplier (pkg_type0) MPI mode and pinmap mode
• Secondary supplier (pkg_type1) MPI mode and pinmap mode (if applicable)
• Memory size (MB)

1. MPI3 settings (if NOR Flash is connected):

• MPI mode (typically BSP_MPI3_MODE_0 for NOR)
• Memory size (MB)

For every MPI controller the part enables, the mode must be stated explicitly — including NOR (BSP_MPIx_MODE_0). Never leave it to the shared fallback: a later change to that fallback would then silently change this part.

Reference: Package Type Mapping from Part Number

The package letter (e.g., U in SF32LB577**U**DNN6) indicates the package type:

MPI Mode Reference

Pinmap Mode Reference

Modification Steps

Step 1: customer/boards/Kconfig_soc.sf32lb57x

Add a simple config symbol (auto-selected by board Kconfig). Use select SOC_PACKAGE_* based on package type:

config SOC_SF32LB57xxxN6
    bool
    select SOC_PACKAGE_QFN68   # or QFN80 / BGA112

• Ensure the config name follows the pattern SOC_SF32LB57 + chip suffix (e.g., SOC_SF32LB573UB7N6)
• Add it in alphabetical order within the existing list

Step 2: customer/boards/Kconfig_soc.sf32lb57x.v1

Add to the SOC_SF32LB57X_PART choice block for manual user selection:

config SOC_SF32LB57xxxN6
    bool "SF32LB57xxxN6"
    select SOC_PACKAGE_QFN68   # or QFN80 / BGA112

• Add it in alphabetical order within the choice block

Step 3: new file soc/sf32lb57x/Kconfig.<part>

This is the only place for the part's defaults. The file name is Kconfig. followed by the part number in lowercase (Kconfig.sf32lb57eybbn6, Kconfig.sf32bprtyb3n6), and it must end with CRLF line endings like the rest of the tree.

if SOC_SF32LB57xxxN6
configdefault BSP_ENABLE_MPI1
    default y
 
choice BSP_MPI1_MODE_CHOICE
    default BSP_MPI1_MODE_<n>
endchoice
 
configdefault BSP_QSPI1_MEM_SIZE
    default <MB>
 
configdefault BSP_ENABLE_MPI2
    default y
 
choice BSP_MPI2_MODE_CHOICE
    default BSP_MPI2_MODE_<n>
endchoice
 
configdefault BSP_QSPI2_MEM_SIZE
    default <MB>
 
# only when MPI1 runs a PSRAM mode (2/3/4/5/6)
configdefault BSP_PSRAM1_PKG_TYPE0_MPI_MODE
    default <n>
 
configdefault BSP_PSRAM1_PKG_TYPE0_PINMAP_MODE
    default <n>
 
# only when the part has a secondary PSRAM1 supplier: mode and pinmap together
configdefault BSP_PSRAM1_PKG_TYPE1_MPI_MODE
    default <n>
 
configdefault BSP_PSRAM1_PKG_TYPE1_PINMAP_MODE
    default <n>
 
# only when MPI2 runs a PSRAM mode (2/3/4/5/6)
configdefault BSP_PSRAM2_PKG_TYPE0_MPI_MODE
    default <n>
 
configdefault BSP_PSRAM2_PKG_TYPE0_PINMAP_MODE
    default <n>
endif

Which symbol carries which setting:

Rules:

• A configdefault block may contain only `default` statements — no

prompt, depends on, select, imply or range (kconfiglib rejects them). Conditions go on the default itself: default <v> if <cond>.

• Write the entries for a controller together, in this order: enable, mode,

memory size. Omit a controller entirely when the part does not enable it.

• State a PSRAM's PKG_TYPE0 mode and pinmap **only when the matching MPI

controller runs a PSRAM mode (2/3/4/5/6) — that is when the PSRAM is selected and the values are actually read. For NOR (mode 0) or a controller the part does not enable, leave them out. Never omit a value the part *does* use: the shared fallback would then decide it silently. (`BSP_PSRAM1_PKG_TYPE1_*` describes a secondary PSRAM1 supplier: for a part that populates one, state both** its mode and its pinmap (e.g. default 6 and default 2) — never leave the type-1 pinmap to the shared default. TYPE2/TYPE3 are not used yet.)

• The MPI mode decides whether PSRAM or NOR is used. For a PSRAM mode

(2/3/4/5/6) Kconfig automatically selects BSP_USING_PSRAM and enables BSP_USING_PSRAM1/2, which is what makes the BSP_PSRAM*_PKG_TYPE*_* values take effect.

Step 4: board Kconfig.board (for boards that use the new part)

Each core's board file selects the part symbol:

config BSP_USING_BOARD_XXX
    bool
    select SOC_SF32LB57X
    select SOC_SF32LB57xxxN6
    select BF0_HCPU        # BF0_LCPU / BF0_ACPU on the other cores
    default y

Do not edit these when adding a part number

customer/boards/Kconfig_drv and customer/boards/Kconfig_soc.sf32lb57x.common — they keep only the part-number-independent fallbacks (default n, default BSP_MPIx_MODE_0, default memory sizes, default pinmap modes).

Kconfig_soc.sf32lb57x.common pulls the part files in with

source "$SIFLI_SDK/soc/sf32lb57x/Kconfig.*"

and that line must stay before the config declarations in that file and before Kconfig_drv is parsed. configdefault inserts its defaults at the position where it was parsed, and kconfiglib picks the first default whose condition holds, so a part file that is sourced later would be silently overridden by the unconditional fallback defaults. Keep the line where it is.

Verification

After making all changes, verify by:

1. Checking that the board's Kconfig.board selects the correct

SOC_SF32LB57xxxN6 symbol

1. Building a project that uses this board — a Kconfig warning aborts the

build, so a successful build means the part file parses cleanly:

`` scons --board=<board_name> -j8 ``

1. Checking the generated build_<board_name>/<core>/rtconfig.h for the

expected values, e.g. for the part above:

`` #define BSP_ENABLE_MPI1 1 #define BSP_MPI1_MODE_5 1 #define BSP_QSPI1_MEM_SIZE 4 ``

Re-running the build with the part file removed must change these values — if it does not, the file is not being sourced.

1. Running sdk.py menuconfig --board=<board_name> to verify the MPI mode

choices show the intended selection.

Note: adding a part file shifts the line order of a few #defines in the generated .config / rtconfig.h (the symbols' first menu node moves into the early-sourced part file). The values are unchanged; do not chase that diff.

Example

Part SF32LB579V6EN6 (BGA112, MPI1 as 8 MB NOR flash, MPI2 in OPSRAM mode with PSRAM2, 32 MB). Note there is no BSP_PSRAM1_* entry: MPI1 runs NOR, so PSRAM1 is never selected:

`customer/boards/Kconfig_soc.sf32lb57x`: select SOC_PACKAGE_BGA112

`customer/boards/Kconfig_soc.sf32lb57x.v1`: bool "SF32LB579V6EN6" + select SOC_PACKAGE_BGA112

`soc/sf32lb57x/Kconfig.sf32lb579v6en6`:

if SOC_SF32LB579V6EN6
configdefault BSP_ENABLE_MPI1
    default y
 
choice BSP_MPI1_MODE_CHOICE
    default BSP_MPI1_MODE_0
endchoice
 
configdefault BSP_QSPI1_MEM_SIZE
    default 8
 
configdefault BSP_ENABLE_MPI2
    default y
 
choice BSP_MPI2_MODE_CHOICE
    default BSP_MPI2_MODE_3
endchoice
 
configdefault BSP_QSPI2_MEM_SIZE
    default 32
 
configdefault BSP_PSRAM2_PKG_TYPE0_MPI_MODE
    default 3
 
configdefault BSP_PSRAM2_PKG_TYPE0_PINMAP_MODE
    default 3
endif