Add optional BMA456 accelerometer init on shared I2C bus.

Probe and configure the sensor when present; log and continue boot if init fails so boards without BMA456 still run normally. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-05-18 22:51:32 +02:00
parent 755bdd92d7
commit e5db0b21c7
168 changed files with 42062 additions and 2 deletions
@@ -0,0 +1,18 @@
+COINES_INSTALL_PATH ?= ../../../..
+
+EXAMPLE_FILE ?= auto_low_power.c
+
+API_LOCATION ?= ../..
+
+COMMON_LOCATION ?= ..
+
+C_SRCS += \
+$(API_LOCATION)/bma4.c \
+$(API_LOCATION)/bma456mm.c \
+$(COMMON_LOCATION)/common/common.c
+
+INCLUDEPATHS += \
+$(API_LOCATION) \
+$(COMMON_LOCATION)/common
+
+include $(COINES_INSTALL_PATH)/coines.mk
@@ -0,0 +1,146 @@
+/**\
+ * Copyright (c) 2022 Bosch Sensortec GmbH. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ **/
+
+#include <stdio.h>
+#include "bma456mm.h"
+#include "common.h"
+
+/******************************************************************************/
+/*!            Function                                                       */
+
+/* This function starts the execution of program. */
+int main(void)
+{
+    /* Variable to store the status of API */
+    int8_t rslt;
+
+    /* Sensor initialization configuration */
+    struct bma4_dev bma = { 0 };
+
+    /* Variable to store auto low power state */
+    uint8_t auto_low_power_state = 0;
+
+    struct bma4_accel_config accel_conf = { 0 };
+    struct bma456mm_auto_low_power auto_low_power = { 0 };
+
+    /* Interface reference is given as a parameter
+     *         For I2C : BMA4_I2C_INTF
+     *         For SPI : BMA4_SPI_INTF
+     * Variant information given as parameter - BMA45X_VARIANT
+     */
+    rslt = bma4_interface_init(&bma, BMA4_I2C_INTF, BMA45X_VARIANT);
+    bma4_error_codes_print_result("bma4_interface_init", rslt);
+
+    /* Sensor initialization */
+    rslt = bma456mm_init(&bma);
+    bma4_error_codes_print_result("bma456mm_init status", rslt);
+
+    /* Upload the configuration file to enable the features of the sensor. */
+    rslt = bma456mm_write_config_file(&bma);
+    bma4_error_codes_print_result("bma456mm_write_config status", rslt);
+
+    /* Get the accel configurations */
+    rslt = bma4_get_accel_config(&accel_conf, &bma);
+    bma4_error_codes_print_result("bma4_get_accel_config status", rslt);
+
+    if (rslt == BMA4_OK)
+    {
+        /* Accelerometer configuration settings */
+        /* Output data Rate */
+        accel_conf.odr = BMA4_OUTPUT_DATA_RATE_100HZ;
+
+        /* Gravity range of the sensor (+/- 2G, 4G, 8G, 16G) */
+        accel_conf.range = BMA4_ACCEL_RANGE_2G;
+
+        /* The bandwidth parameter is used to configure the number of sensor samples that are averaged
+         * if it is set to 2, then 2^(bandwidth parameter) samples
+         * are averaged, resulting in 4 averaged samples
+         * Note1 : For more information, refer the datasheet.
+         * Note2 : A higher number of averaged samples will result in a less noisier signal, but
+         * this has an adverse effect on the power consumed.
+         */
+        accel_conf.bandwidth = BMA4_ACCEL_NORMAL_AVG4;
+
+        /* Enable the filter performance mode where averaging of samples
+         * will be done based on above set bandwidth and ODR.
+         * There are two modes
+         *  0 -> Averaging samples (Default)
+         *  1 -> No averaging
+         * For more info on No Averaging mode refer datasheet.
+         */
+        accel_conf.perf_mode = BMA4_CIC_AVG_MODE;
+
+        /* Set the accel configurations */
+        rslt = bma4_set_accel_config(&accel_conf, &bma);
+        bma4_error_codes_print_result("bma4_set_accel_config status", rslt);
+
+        /* NOTE : Enable accel after set of configurations */
+        rslt = bma4_set_accel_enable(BMA4_ENABLE, &bma);
+        bma4_error_codes_print_result("bma4_set_accel_enable status", rslt);
+
+        if (rslt == BMA4_OK)
+        {
+            /* Enable auto low power state through no-motion interrupt */
+            auto_low_power.no_motion = 0;
+
+            /* Enable auto low power state through time-out duration */
+            auto_low_power.time_out = 1;
+
+            /* Time-out duration is (value * resolution) eg: (10 * 20ms) */
+            auto_low_power.time_out_dur = 10;
+
+            /* These bits used to set odr at auto low power mode. default
+             * value is '0'(i.e) 25/16 HZ */
+            auto_low_power.lp_odr = 0;
+
+            /* Set this bit to set default odr of titan core in auto low power mode */
+            auto_low_power.pwr_mgt = 1;
+
+            /* Configure Auto low power settings */
+            rslt = bma456mm_set_auto_low_power_config(&auto_low_power, &bma);
+            bma4_error_codes_print_result("bma456mm_set_auto_low_power_config status", rslt);
+
+            if (rslt == BMA4_OK)
+            {
+                /* Get output of auto low power state */
+                rslt = bma456mm_get_auto_low_power_state(&auto_low_power_state, &bma);
+                bma4_error_codes_print_result("bma456mm_get_auto_low_power_state status", rslt);
+            }
+        }
+    }
+
+    if (rslt == BMA4_OK)
+    {
+        /* Enable auto low power feature */
+        rslt = bma456mm_feature_enable(BMA456MM_AUTO_LOW_POWER, BMA4_ENABLE, &bma);
+        bma4_error_codes_print_result("bma456mm_feature_enable status", rslt);
+    }
+
+    if (rslt == BMA4_OK)
+    {
+        /* Read and check the ODR change after changing the auto low power settings */
+        rslt = bma4_get_accel_config(&accel_conf, &bma);
+        bma4_error_codes_print_result("bma4_get_accel_config status", rslt);
+
+        if (rslt == BMA4_OK)
+        {
+            printf("ODR : %X\n", accel_conf.odr);
+
+            if (auto_low_power_state)
+            {
+                printf("Auto low power state : Disabled(Auto wake state)");
+            }
+            else
+            {
+                printf("Auto low power state : Enabled(Auto sleep state)");
+            }
+        }
+    }
+
+    bma4_coines_deinit();
+
+    return rslt;
+}