imu: addded configuration service.

BugzID: 59524

Signed-off-by: Lucien Mueller <lucien.mueller@netmodule.com>

recipes-extended/imu-setup/config/imu-lsm6ds3.conf

@@ -0,0 +1,5 @@
+# Imu accelerometer sample-frequency in Hz (one of [13 26 52 104 208 416])
+ACC_SAMPLING_FREQUENCY="13"
+
+# Imu gyroscope sample-frequency in Hz (one of [13 26 52 104 208 416])
+GYRO_SAMPLING_FREQUENCY="13"

recipes-extended/imu-setup/files/imu-setup.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Configure imu
+Requires=gpsd.service
+After=gpsd.service
+
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/imu-setup
+EnvironmentFile=/etc/imu-lsm6ds3.conf
+
+[Install]
+WantedBy=multi-user.target

recipes-extended/imu-setup/files/imu-setup.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+ACC_SYSFS_PATH="/sys/bus/iio/devices/iio:device0"
+GYRO_SYSFS_PATH="/sys/bus/iio/devices/iio:device1"
+
+echo 0 > $ACC_SYSFS_PATH/buffer/enable
+echo $ACC_SAMPLING_FREQUENCY > $ACC_SYSFS_PATH/sampling_frequency
+echo 1 > $ACC_SYSFS_PATH/buffer/enable
+
+echo 0 > $GYRO_SYSFS_PATH/buffer/enable
+echo $GYRO_SAMPLING_FREQUENCY > $GYRO_SYSFS_PATH/sampling_frequency
+echo 1 > $GYRO_SYSFS_PATH/buffer/enable
+
+exit 0

recipes-extended/imu-setup/imu-setup_0.0.1.bb

@@ -0,0 +1,33 @@
+# Copyright (C) 2019 Lucien Mueller <lucien.mueller@netmodule.com>
+# Released under the MIT license (see COPYING.MIT for the terms)
+inherit systemd
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+FILESEXTRAPATHS_prepend := "${THISDIR}/config:"
+
+RDEPENDS_${PN} = "bash"
+
+SRC_URI = " \
+            file://imu-setup.service \
+            file://imu-setup.sh \
+            file://imu-lsm6ds3.conf \
+          "
+
+FILES_${PN} = "${systemd_unitdir}/system ${bindir} /etc"
+
+SYSTEMD_SERVICE_${PN} =" \
+                            imu-setup.service \
+                        "
+
+do_install() {
+
+    install -d ${D}${systemd_unitdir}/system
+    install -m 644 ${WORKDIR}/imu-setup.service ${D}${systemd_unitdir}/system/
+
+    install -d ${D}${bindir}
+    install -m 744 ${WORKDIR}/imu-setup.sh ${D}${bindir}/imu-setup
+
+    install -d ${D}/etc
+    install -m 644 ${WORKDIR}/imu-lsm6ds3.conf ${D}/etc/imu-lsm6ds3.conf
+}
+