From the function name of 'HAL_GetTickFreq()' function, I expect that it returns tick frequency in Hz.
But I experienced that it returns tick period in milliseconds. If tick frequency is 1000 Hz, then it returns 1, that value comes from HAL_TICK_FREQ_1KHZ macro.
'Period' and 'frequency' terms are not the same, but of course, they are closely related to each other. Period is expressed in a time unit, like seconds or milliseconds, while frequency is expressed in Hz.
The function's doxygen brief definition says ' "@brief Return tick frequency." - and this is displayed on help files. It should say "Return tick period". The "@retval tick period in Hz" doxygen definition should be also corrected to "tick period in millisecond".
The names and descriptions of the related macro values in stm32l1xx_hal.h file are also misleading:
#define HAL_TICK_FREQ_10HZ 100U
#define HAL_TICK_FREQ_100HZ 10U
#define HAL_TICK_FREQ_1KHZ 1U
#define HAL_TICK_FREQ_DEFAULT HAL_TICK_FREQ_1KHZ
These values are periods in milliseconds, and not tick frequencies. So something like 'HAL_TICK_10HZ_TICK_PERIOD_MSEC' would be better.
