Tool/software:
Hi Team,
I am using sleep(10) function in QNX, but wake up is happening within 8 sec.
We have already raised the QNX ticket regarding that and they have given the below inputs.
Can you please give your input regarding that.
QNX reply:
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in psqkqa , /code/hardware/startup/lib/aarch64/init_qtime_v8gt.c
aarch64/init_qtime_v8gt.c: if (timer_freq == 0) {
aarch64/init_qtime_v8gt.c: timer_freq = aa64_sr_rd32(cntfrq_el0);
aarch64/init_qtime_v8gt.c: invert_timer_freq(qtime, timer_freq);
aarch64/init_qtime_v8gt.c: qtime->cycles_per_sec = timer_freq;
Note, the actual configuration the value in the cntfrq_el0 is done by the uBoot, QNX just uses it to copute cycles_per_sec and its a generic code.
The actual core frequency in MHz can be read by calling this function from startup code "aarch64_cpuspeed()"
It will display frequency, please note, CPU frequency is not configured at startup. So, It could be set via uBoot/SCI firmware.
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Thanks & regards,
Veerahema
