/***************************************************************************//** * @file dev_accel.h * @brief Accelerometer driver of RT-Thread RTOS for EFM32 * COPYRIGHT (C) 2011, RT-Thread Development Team * @author onelife * @version 0.4 beta ******************************************************************************* * @section License * The license and distribution terms for this file may be found in the file * LICENSE in this distribution or at http://www.rt-thread.org/license/LICENSE ******************************************************************************* * @section Change Logs * Date Author Notes * 2011-07-13 onelife Initial creation for using EFM32 ADC module to * interface the Freescale MMA7361L * 2011-08-02 onelife Add digital interface support of using EFM32 IIC * module for the Freescale MMA7455L ******************************************************************************/ #ifndef __DEV_ACCEL_H__ #define __DEV_ACCEL_H__ /* Includes ------------------------------------------------------------------*/ #if (EFM32_USING_ACCEL == EFM32_INTERFACE_IIC) #include "mma7455l.h" #endif /* Exported types ------------------------------------------------------------*/ struct efm32_accel_result_t { rt_int32_t x; rt_int32_t y; rt_int32_t z; }; /* Exported constants --------------------------------------------------------*/ /* Exported macro ------------------------------------------------------------*/ /* MMA7361LC g-Select g-Range Sensitivity 0 1.5 g 800 mV/g 1 6 g 206 mV/g MMA7455L g-Select g-Range Sensitivity 0 2 g 64 LSB/g 1 4 g 32 LSB/g 2 8 g 16 LSB/g */ #define ACCEL_G_SELECT (0) #define ACCEL_CAL_SAMPLES (4) /* Must be multiple of 2 */ #define ACCEL_CAL_ROUND (50) #define ACCEL_CAL_SIMPLE (0) #define ACCEL_CAL_INTERACT (1) #if (EFM32_USING_ACCEL == EFM32_INTERFACE_ADC) /* Reading_at_1g = Sensitivity * Max_reading / Refference_voltage */ #define ACCEL_CAL_1G_VALUE {993, 256} #define ACCEL_X_ADC_CH ADC_SCANCTRL_INPUTMASK_CH2 #define ACCEL_Y_ADC_CH ADC_SCANCTRL_INPUTMASK_CH3 #define ACCEL_Z_ADC_CH ADC_SCANCTRL_INPUTMASK_CH4 #elif (EFM32_USING_ACCEL == EFM32_INTERFACE_IIC) #define ACCEL_CAL_1G_VALUE {0x3f, 0x1f, 0x0f} #define ACCEL_IIC_SLAVE_ADDRESS (0x1d) #define ACCEL_INT1_PORT (gpioPortD) #define ACCEL_INT1_PIN (13) #define ACCEL_INT2_PORT (gpioPortD) #define ACCEL_INT2_PIN (12) #define ACCEL_MODE_STANDBY (1 << 0) #define ACCEL_MODE_MEASUREMENT (1 << 1) #define ACCEL_MODE_LEVEL (1 << 2) #define ACCEL_MODE_PULSE (1 << 3) #define ACCEL_RANGE_8G (1 << 4) #define ACCEL_RANGE_4G (1 << 5) #define ACCEL_RANGE_2G (1 << 6) #define ACCEL_INTPIN_INVERSE (1 << 7) #define ACCEL_INT_LEVEL_PULSE (1 << 8) #define ACCEL_INT_PULSE_LEVEL (1 << 9) #define ACCEL_INT_SINGLE_DOUBLE (1 << 10) #define ACCEL_DISABLE_X (1 << 11) #define ACCEL_DISABLE_Y (1 << 12) #define ACCEL_DISABLE_Z (1 << 13) #define ACCEL_THRESHOLD_INTEGER (1 << 14) /* For level detection only */ #define ACCEL_BANDWIDTH_125HZ (1 << 15) #define ACCEL_LEVEL_AND (1 << 16) #define ACCEL_PULSE_AND (1 << 17) #define ACCEL_DRIVE_STRONG (1 << 18) #define ACCEL_SOURCE_LEVEL_X (1 << 19) #define ACCEL_SOURCE_LEVEL_Y (1 << 20) #define ACCEL_SOURCE_LEVEL_Z (1 << 21) #define ACCEL_SOURCE_PULSE_X (1 << 22) #define ACCEL_SOURCE_PULSE_Y (1 << 23) #define ACCEL_SOURCE_PULSE_Z (1 << 24) #define ACCEL_SHIFT_MODE (0) #define ACCEL_SHIFT_RANGE (4) #define ACCEL_SHIFT_INT (8) #define ACCEL_SHIFT_DISABLE (11) #define ACCEL_SHIFT_SOURCE (19) #define ACCEL_MASK_MODE (0X0000000f << ACCEL_SHIFT_MODE) #define ACCEL_MASK_RANGE (0X00000007 << ACCEL_SHIFT_RANGE) #define ACCEL_MASK_INT (0X00000007 << ACCEL_SHIFT_INT) #define ACCEL_MASK_DISABLE (0X00000007 << ACCEL_SHIFT_DISABLE) #define ACCEL_MASK_SOURCE (0X0000003f << ACCEL_SHIFT_SOURCE) #endif /* Exported functions ------------------------------------------------------- */ rt_err_t efm_accel_get_data(struct efm32_accel_result_t *data, rt_bool_t lowResolution); rt_err_t efm_accel_config(rt_uint32_t config, rt_uint8_t level_threshold, rt_uint8_t pulse_threshold, rt_uint8_t pulse_duration, rt_uint8_t pulse_latency, rt_uint8_t pulse_duration2); rt_err_t efm_accel_auto_zero(rt_uint8_t mode, rt_tick_t period); rt_err_t efm_accel_init(void); #endif /*__DEV_ACCEL_H__ */