STMicroelectronics mag40 magnetometer sensor device driver for Google nanohub.
This drivers support following devices:
- LSM303AGR
- LSM303AH
- LIS2MDL
- Supported features:
A. Reports geomagnetic field vector data
B. Different data rates: 10/20/50/100 Hz
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_MAG40_CAL_ENABLED /* specify whether the magnetic calibration API must be included */
ST_MAG40_I2C_BUS_ID /* specify I2C Bus ID */
ST_MAG40_I2C_SPEED /* specify I2C Bus speed in hz */
ST_MAG40_I2C_ADDR /* specify device I2C address */
ST_MAG40_INT_PIN /* specify the gpio used for the DRDY irq */
ST_MAG40_INT_IRQ /* specify the exti interrupt of ST_MAG40_INT_PIN */
ST_MAG40_ROT_MATRIX /* specify how axis has to be rotated according to variant platform
* orientation.
*
* = r11, r12, r13, r21, r22, r23, r31, r32, r33
*
* Rotation:
*
* [x'] [r11 r12 r13] [x] [r11*x + r12*y +r13*z]
* [y'] = [r21 r22 r23] * [y] = [r21*x + r22*y +r23*z]
* [z'] [r31 r32 r33] [x] [r31*x + r32*y +r33*z]
*/
Example:
/*
* Define platform/variant dependent ST_MAG40 device macros
*/
#define ST_MAG40_CAL_ENABLED 1
/* I2C defs to be used when device is plugged on U4 slot */
#define ST_MAG40_I2C_BUS_ID 0
#define ST_MAG40_I2C_SPEED 400000
#define ST_MAG40_I2C_ADDR 0x1E
#define ST_MAG40_INT_PIN GPIO_PB(4)
#define ST_MAG40_INT_IRQ EXTI4_IRQn
#define ST_MAG40_ROT_MATRIX 0, 1, 0, 1, 0, 0, 0, 0, 1
If these macros are not defined in the current variant the driver forces a compilation
error.
liiir1985
7f62dcda9f