FOC algorithm occupy most CPU time ?

have no idea which SW you are running, but if it's close to the eSMO example in controlSUITE, you can see that a 10 KHz PWM/control/est rate uses 27% of the processor at 40 MHz.

So at 16 KHz it should be < 50 %.  That is from the document:

C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\HVPM_Enhanced_Sensorless_2803x\~Docs

Thanks a lot,

ChrisClearman ,

I am using project(E:\TI PMSM\controlSUITE\development_kits\DRV8312-C2-KIT_v128\PM_Sensorless) ,

then moved it to mcu F28020 ,Please hlep me check it why it occupy too many CPU time? 

This is my project , I have deleted other fuction, only keep motor algorithm.

in order to prove algorithm , it occupys too many CPU time, i have deleted most of  FOC algorithm

then I found it still occupys too many CPU time .6102.F28020DriverPMSM.zip

dfde,

I can't debug your code. I would obviously check your clocking, PIE, and other interrupts.  Set-up a GPIO toggle in your main ISR to see how often it's getting called.

Thanks,

ChrisClearman,today I have found that :

if I add InitFlash() and MemCopy(), the ISR running normal and ISR  occupys CPU <  50%，

but I donnot know why needs to copy  InitFlash()  function to RAM？

at boot, the flash is configured for maximum amount of wait states (code will run SLOW)

InitFlash() configures the flash appropriately

InitFlash() initially resides in Flash because it is part of your non-volatile image.

You don't want the code that configures the flash to reside in the slow running flash.

You need to copy InitiFlash to full speed RAM and then call this function to configure this flash.