Cube Timer delay is not accurate reason

Yesterday evening test 32cube Configuration Good timer, to 1ms for an interrupt, and then in the program to do a 1s delay, the results found that the actual delay 5s around, think of no solution, carefully review the cube configuration also no problem. Finally I opened the generated project folder inside the IOC file, only to find the actual clock configuration problem, I configured 72M, the result is actually only 16M, but I new IOC configuration is definitely 72M, so it may be stm32cube software itself a bug.

So if the timer is not accurate in the future, be sure to check out the actual IOC file in the generated project directory! See if the actual configuration and the configuration you started are different.

Cube Timer delay is not accurate reason