samples: sensor: Add stm32_temp sample application
Demonstating usage of STM32 temperature sensor.
Signed-off-by: Eug Krashtan <eug.krashtan@gmail.com>
diff --git a/samples/sensor/stm32_temp_sensor/CMakeLists.txt b/samples/sensor/stm32_temp_sensor/CMakeLists.txt
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+++ b/samples/sensor/stm32_temp_sensor/CMakeLists.txt
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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.13.1)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(stm32_temp_sensor)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})
diff --git a/samples/sensor/stm32_temp_sensor/README.rst b/samples/sensor/stm32_temp_sensor/README.rst
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+++ b/samples/sensor/stm32_temp_sensor/README.rst
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+.. _stm32_temp_sensor:
+
+STM32 Temperature Sensor
+########################
+
+Overview
+********
+
+This sample periodically reads temperature from the STM32 Internal
+Temperature Sensor and display the results.
+
+Building and Running
+********************
+
+In order to run this sample, make sure to enable ``stm32_temp`` node in your
+board DT file.
+
+.. zephyr-app-commands::
+ :zephyr-app: samples/sensor/stm32_temp_sensor
+ :board: nucleo_f103rb
+ :goals: build
+ :compact:
+
+Sample Output
+=============
+
+.. code-block:: console
+
+ Current temperature: 22.6 °C
+ Current temperature: 22.8 °C
+ Current temperature: 23.1 °C
diff --git a/samples/sensor/stm32_temp_sensor/boards/nucleo_f401re.overlay b/samples/sensor/stm32_temp_sensor/boards/nucleo_f401re.overlay
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+++ b/samples/sensor/stm32_temp_sensor/boards/nucleo_f401re.overlay
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+/*
+ * Copyright (c) 2021 Eug Krashtan
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Application overlay for creating temperature sensor device instance
+ */
+
+/ {
+ stm-temp {
+ label = "DIE_TEMP";
+ compatible = "st,stm32-temp";
+ io-channels = <&adc1 16>;
+ status = "okay";
+ };
+};
diff --git a/samples/sensor/stm32_temp_sensor/boards/stm32f103_mini.overlay b/samples/sensor/stm32_temp_sensor/boards/stm32f103_mini.overlay
new file mode 100644
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+++ b/samples/sensor/stm32_temp_sensor/boards/stm32f103_mini.overlay
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+/*
+ * Copyright (c) 2021 Eug Krashtan
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Application overlay for creating temperature sensor device instance
+ */
+
+/ {
+ stm-temp {
+ label = "DIE_TEMP";
+ compatible = "st,stm32-temp";
+ io-channels = <&adc1 16>;
+ avgslope = <43>;
+ v25 = <1430>;
+ ntc;
+ status = "okay";
+ };
+};
+
+&adc1 {
+ status = "okay";
+};
diff --git a/samples/sensor/stm32_temp_sensor/prj.conf b/samples/sensor/stm32_temp_sensor/prj.conf
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+++ b/samples/sensor/stm32_temp_sensor/prj.conf
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+CONFIG_SENSOR=y
+CONFIG_ADC=y
+CONFIG_STM32_TEMP=y
+CONFIG_PRINTK=y
+CONFIG_CBPRINTF_FP_SUPPORT=y
diff --git a/samples/sensor/stm32_temp_sensor/sample.yaml b/samples/sensor/stm32_temp_sensor/sample.yaml
new file mode 100644
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+++ b/samples/sensor/stm32_temp_sensor/sample.yaml
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+sample:
+ description: Usage of STM32 temperature sensor
+ name: stm32_temp_sensor
+tests:
+ sample.sensor.stm32_temp_sensor:
+ depends_on: adc
+ tags: sensors
+ build_only: true
+ platform_allow: nucleo_f401re stm32f103_mini
diff --git a/samples/sensor/stm32_temp_sensor/src/main.c b/samples/sensor/stm32_temp_sensor/src/main.c
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+++ b/samples/sensor/stm32_temp_sensor/src/main.c
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+/*
+ * Copyright (c) 2021 Eug Krashtan
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr.h>
+#include <device.h>
+#include <drivers/sensor.h>
+#include <sys/printk.h>
+
+
+void main(void)
+{
+ struct sensor_value val;
+ int rc;
+ const struct device *dev =
+ DEVICE_DT_GET(DT_INST(0, st_stm32_temp));
+
+ if (!device_is_ready(dev)) {
+ printk("Temperature sensor is not ready\n");
+ return;
+ }
+
+ printk("STM32 Die temperature sensor test\n");
+
+ while (1) {
+ k_sleep(K_MSEC(300));
+
+ /* fetch sensor samples */
+ rc = sensor_sample_fetch(dev);
+ if (rc) {
+ printk("Failed to fetch sample (%d)\n", rc);
+ continue;
+ }
+
+ rc = sensor_channel_get(dev, SENSOR_CHAN_DIE_TEMP, &val);
+ if (rc) {
+ printk("Failed to get data (%d)\n", rc);
+ continue;
+ }
+
+ printk("Current temperature: %.1f °C\n",
+ sensor_value_to_double(&val));
+ }
+}
