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5 years, 5 months ago.
power management time functions return 0
When I invoke the functions mbed_time_sleep(), mbed_time_deepsleep(), mbed_time_idle() and mbed_uptime(), I get 0 for each.
<<code>>
printf("sleep time = %d\r\n", mbed_time_sleep());
printf("deep sleep time = %d\r\n", mbed_time_deepsleep());
printf("idle time = %d\r\n", mbed_time_idle());
printf("up time = %d\r\n", mbed_uptime());
<</code>>
DEVICE_LPTICKER is defined. I am using mbed-os-5.10.3. Is there anything else required to get the time values?
1 Answer
5 years, 5 months ago.
Hi Leon,
There might be some configuration parameters missed.
Please add below code snippet to mbed_app.json
mbed_app.json
"macros": [
"MBED_ALL_STATS_ENABLED"
]
And using debug profile when compilation
command
mbed compile -t [TOOLCHAIN] -m [TARGET_MCU] --profile mbed-os/tools/profiles/debug.json
Please let me know if you have any questions!
- Desmond, team Mbed
Hi Desmond,
I did as you suggested and I still have the same problem.
"macros": [
"MBED_ALL_STATS_ENABLED=1"
],
plain text <<code>> mbed compile -m MTS_DRAGONFLY_L471QG -t GCC_ARM --profile mbed-os/tools/profiles/debug.json
Every 5 seconds my application prints out:
sleep time = 0
deep sleep time = 0
idle time = 0
up time = 0
Leon
posted by 20 Nov 2018Hi Leon,
I attach the code snippet I am using for testing this feature, could you try this one and let me know how it goes? Thanks.
get sleep time with this snippet
#include "mbed.h"
#include "mbed_stats.h"
#if !defined(MBED_CPU_STATS_ENABLED) || !defined(DEVICE_LPTICKER) || !defined(DEVICE_SLEEP)
#error [NOT_SUPPORTED] test not supported
#endif
DigitalOut led1(LED1);
void print_stats()
{
mbed_stats_cpu_t stats;
mbed_stats_cpu_get(&stats);
printf("%-20lld", stats.uptime);
printf("%-20lld", stats.idle_time);
printf("%-20lld", stats.sleep_time);
printf("%-20lld\r\n", stats.deep_sleep_time);
}
// main() runs in its own thread in the OS
int main()
{
printf("%-20s%-20s%-20s%-20s\r\n", "Uptime", "Idle Time", "Sleep time", "DeepSleep time");
while (1) {
led1 = !led1;
print_stats();
Thread::wait(3000);
}
return 0;
}