Hello,
The OSIF implementation can be found in the osif_baremetal.c file.
The reload value of the SysTick is the core frequency divided by 1000, that means that the Systick interrupt is called every 1ms and increment the s_osif_tick_cnt counter.
The counter is then read and compered by the OSIF_TimeDelay() function.
If the core frequency was divided by 10000, the counter would increment every 100us (OSIF_TimeDelay(1) = 100us).
The SysTick description can be found in ARM documentation.
Cortex™-M4 Devices Generic User Guide
Section 4.4 System timer, SysTick
Regards,
Daniel
Hi Daniel,
I also have the same requirement to generate microsecond delay, but my Controllers is MPC5777C. OSIF is connected to PIT(default) and its frequency is 100MHz. I have also followed your instructions and updated divider value in "static inline void osif_UpdateTickConfig(void)" function, as shown in image below.
The problem is when I call "OSIF_TimeDelay(1)" program pointer is struck in "osif_Tick()".
Kindly provide suitable solution.
Regards,
Eashwar
Hello,
The OSIF implementation can be found in the osif_baremetal.c file.
The reload value of the SysTick is the core frequency divided by 1000, that means that the Systick interrupt is called every 1ms and increment the s_osif_tick_cnt counter.
The counter is then read and compered by the OSIF_TimeDelay() function.
If the core frequency was divided by 10000, the counter would increment every 100us (OSIF_TimeDelay(1) = 100us).
The SysTick description can be found in ARM documentation.
Cortex™-M4 Devices Generic User Guide
Section 4.4 System timer, SysTick
Regards,
Daniel
Hi Daniel,
I also have the same requirement to generate microsecond delay, but my Controllers is MPC5777C. OSIF is connected to PIT(default) and its frequency is 100MHz. I have also followed your instructions and updated divider value in "static inline void osif_UpdateTickConfig(void)" function, as shown in image below.
The problem is when I call "OSIF_TimeDelay(1)" program pointer is struck in "osif_Tick()".
Kindly provide suitable solution.
Regards,
Eashwar
