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examples/display_rotation/main/main.c:1

• imu can remain NULL when mpu6886_create() fails (init only logs/configures when imu is non-null), but app_imu_read() unconditionally calls mpu6886_get_*() with imu. Add an early return in app_imu_read() when imu == NULL, and consider logging the init failure once in app_imu_init() so the example fails gracefully instead of dereferencing a null handle.
  components/mpu6886/mpu6886.c:1
• This file uses calloc/free and assert() later, but does not include the standard headers that declare them. This can fail builds under C99/C11 with -Werror=implicit-function-declaration (common in ESP-IDF). Add #include <stdlib.h> and #include <assert.h> near the other libc includes.
  components/mpu6886/mpu6886.c:1
• sensor->timer allocation is not checked for failure. If calloc() returns NULL, later calls to gettimeofday(sens->timer, ...) will crash. Return NULL (and remove the I2C device / free sensor) when timer allocation fails. The legacy mpu6886_create() path has the same missing allocation checks.
  components/mpu6886/mpu6886.c:1
• pin_bit_mask is a bitmask of GPIOs and is a 64-bit field in ESP-IDF. Using (BIT0 << gpio_num) performs the shift on a 32-bit value, which is undefined/incorrect for GPIO numbers >= 32 and can silently misconfigure the interrupt pin. Use a 64-bit shift (e.g., 1ULL << interrupt_configuration->interrupt_pin) to correctly support all valid GPIOs.
  components/mpu6886/mpu6886.c:1
• This uses a variable-length array sized by data_len. VLAs are discouraged in ESP-IDF components because they can increase stack usage unpredictably and may be disabled by toolchain/project warnings. Prefer a small fixed-size stack buffer (if all writes are bounded) or allocate a buffer dynamically when needed (and handle allocation failure), or perform a two-step transmit if the I2C API supports it.
  bsp/m5stack_core_2/API.md:1
• The docs now contain internal/anonymous-type placeholders like bsp_sdcard_cfg_t::@..., which makes the generated API documentation harder to read and unstable across builds. This looks like a doc generation artifact; consider adjusting the documentation generator settings (or the source comments/types) so anonymous unions/structs are rendered with stable, human-readable names, and re-generate these API.md files.

# API Reference