README
1STMicroelectronics acc44 accelerometer sensor device driver for Google nanohub.
2The driver uses the device in high-resolution mode with FS=8g.
3
4This drivers support following devices:
5 - LIS2DW12
6
7- Supported features:
8
9A. Reports accelerometer data
10B. Different data rates:
11C. I2C protocol
12D. Data ready reported by interrupt
13
14
15- Platform/variant porting:
16
17The driver requires that following macros are defined in the variant.h
18file of the specific variant:
19
20 ST_ACC44_I2C_BUS_ID /* specify I2C Bus ID */
21 ST_ACC44_I2C_SPEED /* specify I2C Bus speed in hz */
22 ST_ACC44_I2C_ADDR /* specify device I2C address */
23
24 ST_ACC44_INT_PIN /* specify the gpio used for the DRDY irq */
25 ST_ACC44_INT_IRQ /* specify the exti interrupt of ST_ACC44_INT_PIN */
26
27 ST_ACC44_TO_ANDROID_COORDINATE(x, y, z)
28 /* specify how axis has to be rotated according to variant platform
29 * orientation.
30 */
31
32Example:
33
34 /*
35 * Define platform/variant dependent ST_ACC44 device macros
36 */
37 #define ST_ACC44_DBG_ENABLED 1
38
39 /* I2C defs to be used when device is plugged to I2C bus */
40 #define ST_ACC44_I2C_BUS_ID 0
41 #define ST_ACC44_I2C_SPEED 400000
42 #define ST_ACC44_I2C_ADDR 0x19
43
44 #define ST_ACC44_INT_PIN GPIO_PC(5)
45 #define ST_ACC44_INT_IRQ EXTI9_5_IRQn
46
47#define ST_ACC44_TO_ANDROID_COORDINATE(x, y, z) \
48 do { \
49 float xi = x, yi = y, zi = z; \
50 x = xi; y = yi; z = zi; \
51 } while (0)
52
53If these macros are not defined in the current variant the driver forces a compilation
54error.
55