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 ?= step_detector.c
+
+API_LOCATION ?= ../..
+
+COMMON_LOCATION ?= ..
+
+C_SRCS += \
+$(API_LOCATION)/bma4.c \
+$(API_LOCATION)/bma456h.c \
+$(COMMON_LOCATION)/common/common.c
+
+INCLUDEPATHS += \
+$(API_LOCATION) \
+$(COMMON_LOCATION)/common
+
+include $(COINES_INSTALL_PATH)/coines.mk
@@ -0,0 +1,93 @@
+/**\
+ * Copyright (c) 2022 Bosch Sensortec GmbH. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ **/
+
+#include <stdio.h>
+#include "bma456h.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 step detector interrupt status */
+    uint16_t int_status = 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 = bma456h_init(&bma);
+    bma4_error_codes_print_result("bma456h_init status", rslt);
+
+    /* Upload the configuration file to enable the features of the sensor. */
+    rslt = bma456h_write_config_file(&bma);
+    bma4_error_codes_print_result("bma456h_write_config status", rslt);
+
+    /* Enable the accelerometer */
+    rslt = bma4_set_accel_enable(BMA4_ENABLE, &bma);
+    bma4_error_codes_print_result("bma4_set_accel_enable status", rslt);
+
+    if (rslt == BMA4_OK)
+    {
+        /* Map the interrupt pin 1 for step detector */
+        rslt = bma456h_map_interrupt(BMA4_INTR1_MAP, BMA456H_STEP_CNTR_INT, BMA4_ENABLE, &bma);
+        bma4_error_codes_print_result("bma456h_map_interrupt status", rslt);
+
+        if (rslt == BMA4_OK)
+        {
+            /* Enabling step detector feature */
+            rslt = bma456h_feature_enable(BMA456H_STEP_DETECTOR_EN, BMA4_ENABLE, &bma);
+            bma4_error_codes_print_result("bma456h_feature_enable status", rslt);
+
+            if (rslt == BMA4_OK)
+            {
+                /* By setting watermark level 1, the output step resolution is 20 steps.
+                 * By setting watermark level 0, it provides output for each steps for step detection.
+                 */
+                rslt = bma456h_step_counter_set_watermark(0, &bma);
+                bma4_error_codes_print_result("bma456h_step_counter_set_watermark status", rslt);
+            }
+        }
+
+        if (rslt == BMA4_OK)
+        {
+            printf("Move the board in steps to get interrupt\n");
+
+            for (;;)
+            {
+                /* Read interrupt status */
+                rslt = bma456h_read_int_status(&int_status, &bma);
+                bma4_error_codes_print_result("bma456h_read_int_status", rslt);
+
+                /* Filtering only the step detector interrupt */
+                if ((rslt == BMA4_OK) && (int_status & BMA456H_STEP_CNTR_INT))
+                {
+                    printf("The step detector interrupt is occurred\n");
+                    break;
+                }
+
+                int_status = 0;
+            }
+        }
+    }
+
+    bma4_coines_deinit();
+
+    return rslt;
+}