| STMicroelectronics acc44 accelerometer sensor device driver for Google nanohub. |
| The driver uses the device in high-resolution mode with FS=8g. |
| |
| This drivers support following devices: |
| - LIS2DW12 |
| |
| - Supported features: |
| |
| A. Reports accelerometer data |
| B. Different data rates: |
| C. I2C protocol |
| D. Data ready reported by interrupt |
| |
| |
| - Platform/variant porting: |
| |
| The driver requires that following macros are defined in the variant.h |
| file of the specific variant: |
| |
| ST_ACC44_I2C_BUS_ID /* specify I2C Bus ID */ |
| ST_ACC44_I2C_SPEED /* specify I2C Bus speed in hz */ |
| ST_ACC44_I2C_ADDR /* specify device I2C address */ |
| |
| ST_ACC44_INT_PIN /* specify the gpio used for the DRDY irq */ |
| ST_ACC44_INT_IRQ /* specify the exti interrupt of ST_ACC44_INT_PIN */ |
| |
| ST_ACC44_TO_ANDROID_COORDINATE(x, y, z) |
| /* specify how axis has to be rotated according to variant platform |
| * orientation. |
| */ |
| |
| Example: |
| |
| /* |
| * Define platform/variant dependent ST_ACC44 device macros |
| */ |
| #define ST_ACC44_DBG_ENABLED 1 |
| |
| /* I2C defs to be used when device is plugged to I2C bus */ |
| #define ST_ACC44_I2C_BUS_ID 0 |
| #define ST_ACC44_I2C_SPEED 400000 |
| #define ST_ACC44_I2C_ADDR 0x19 |
| |
| #define ST_ACC44_INT_PIN GPIO_PC(5) |
| #define ST_ACC44_INT_IRQ EXTI9_5_IRQn |
| |
| #define ST_ACC44_TO_ANDROID_COORDINATE(x, y, z) \ |
| do { \ |
| float xi = x, yi = y, zi = z; \ |
| x = xi; y = yi; z = zi; \ |
| } while (0) |
| |
| If these macros are not defined in the current variant the driver forces a compilation |
| error. |
