LOG_MODULE_REGISTER(monitor, LOG_LEVEL_DBG);
#define DIE_TEMP_ALIAS DT_ALIAS(die_temp0)
#define DIE_TEMPERATURE_SENSOR IF_ENABLED(DT_NODE_EXISTS(DIE_TEMP_ALIAS), DEVICE_DT_GET(DIE_TEMP_ALIAS))
static const struct device *const sensor = DIE_TEMPERATURE_SENSOR;
#define STACKSIZE 512
#define MONITOR_THREAD_PRIORITY 15
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) {
LOG_ERR("Failed to fetch sample (%d)", rc);
return rc;
}
rc = sensor_channel_get(dev, SENSOR_CHAN_DIE_TEMP, &val);
if (rc) {
LOG_ERR("Failed to get data (%d)", rc);
return rc;
}
LOG_DBG("CPU Die temperature[%s]: %d°C", dev->name, (int16_t)sensor_value_to_double(&val));
return 0;
}
void monitor_main(void)
{
if (!device_is_ready(sensor)) {
LOG_ERR("sensor: device %s not ready.", sensor->name);
}
uint32_t counter = 0;
while (true) {
int rc = print_die_temperature(sensor);
if (rc < 0) {
LOG_ERR("Failed to print die temperature(err %d)", rc);
}
LOG_DBG("Counter: %d", counter++);
k_msleep(1000);
}
}
K_THREAD_DEFINE(monitor, STACKSIZE, monitor_main, NULL, NULL, NULL, MONITOR_THREAD_PRIORITY, 0, 10000);
this is the last log message from monitor thread, I never got any error message from the thread.
00> [01:37:03.890,808] <dbg> monitor: print_die_temperature: CPU Die temperature[temp@4000c000]: 34°C
00> [01:37:03.890,838] <dbg> monitor: monitor_main: Counter: 5737
The thread will stop after a few thousands of DIE temperature reading and CPU usage of the thread will increase a lot after it stop working.
Is there a limit for the DIE temp reading?
