BMA456 accelerometer (U43) has no firmware, so the part on the board has no use yet
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评估
- 难度
- 5/5
- 预计耗时
- 一周以上
- 新手友好度
- 28/100
- Issue 类型
- 功能
- 描述清晰度
- 基本清楚
- 活跃度
- 活跃
- 技术栈
- arduino, cpp
- 领域
- embedded-iot
调研方向
Read the existing LIS3DH implementation in Apis_Library, especially getPitch() and getRoll(), and the library design rule on sharing code. Then consult the BMA456 datasheet to determine whether plain acceleration reads require Bosch’s feature-engine configuration blob. The work is complete when the driver, shared orientation reduction, data-row and status-snapshot fields are implemented and a hardware test passes.
由索引模型根据 Issue 内容生成。
描述
The Okapi redesign (Project-Okapi v0.6.0, the KiCad board) carries a BMA456 accelerometer, U43, on the on-board I2C segment at 0x18, powered from 3V3_AUX. Nothing in this library or anywhere else in the workspace talks to it, so a built board would have a part that does nothing.
What it is for (Andy, 2026-11-05): the board's orientation when desired, read at a wake. Not continuous sampling and not motion or impulse events, which is why its INT pin is a no-connect on the board.
What the firmware needs:
- A BMA456 driver from its datasheet: power mode, the acceleration registers, and whether Bosch's feature-engine configuration blob is needed for plain acceleration reads (to confirm before writing to the part; the plain registers may not need it).
- The orientation reduction, pitch and roll against a stored zero, which
Apis_Libraryalready does for its LIS3DH (getPitch(),getRoll()) and which should be shared rather than copied, per the library design's rule on copies. - The reading's place in the data row and in the status snapshot.
A hardware test on a board closes it. No milestone here; the hardware side is Project-Okapi v0.7.0.
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