| /* |
| * Copyright (c) 2023 TOKITA Hiroshi |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/kernel.h> |
| #include <zephyr/device.h> |
| #include <zephyr/drivers/sensor.h> |
| #include <zephyr/sys/printk.h> |
| |
| #define DIE_TEMP_ALIAS(i) DT_ALIAS(_CONCAT(die_temp, i)) |
| #define DIE_TEMPERATURE_SENSOR(i, _) \ |
| IF_ENABLED(DT_NODE_EXISTS(DIE_TEMP_ALIAS(i)), (DEVICE_DT_GET(DIE_TEMP_ALIAS(i)),)) |
| |
| /* support up to 16 cpu die temperature sensors */ |
| static const struct device *const sensors[] = {LISTIFY(16, DIE_TEMPERATURE_SENSOR, ())}; |
| |
| static int print_die_temperature(const struct device *dev) |
| { |
| struct sensor_value val; |
| int rc; |
| |
| /* fetch sensor samples */ |
| rc = sensor_sample_fetch(dev); |
| if (rc) { |
| printk("Failed to fetch sample (%d)\n", rc); |
| return rc; |
| } |
| |
| rc = sensor_channel_get(dev, SENSOR_CHAN_DIE_TEMP, &val); |
| if (rc) { |
| printk("Failed to get data (%d)\n", rc); |
| return rc; |
| } |
| |
| printk("CPU Die temperature[%s]: %.1f °C\n", dev->name, sensor_value_to_double(&val)); |
| return 0; |
| } |
| |
| int main(void) |
| { |
| int rc; |
| |
| for (size_t i = 0; i < ARRAY_SIZE(sensors); i++) { |
| if (!device_is_ready(sensors[i])) { |
| printk("sensor: device %s not ready.\n", sensors[i]->name); |
| return 0; |
| } |
| } |
| |
| while (1) { |
| for (size_t i = 0; i < ARRAY_SIZE(sensors); i++) { |
| rc = print_die_temperature(sensors[i]); |
| if (rc < 0) { |
| return 0; |
| } |
| } |
| k_msleep(300); |
| } |
| return 0; |
| } |