BOOSTXL-DRV8323RS: Wrong System Clock 60 Mhz Instead Of 90Mhz for TMS320F28069M

Sergiu Sieber

Part Number: BOOSTXL-DRV8323RS
Other Parts Discussed in Thread: TMS320F28069M, LAUNCHXL-F28069M

Hello,

I use DRV8323RS with Launchpad TMS320F28069M.

All examples provided are working properly.

However when I read on ECAP1 PWM pulse between 1ms to 2ms (RC receiver output), I suppose to get PwmDuty between 90*1ms = 90000 to 90*2ms=180000

but what I am reading is between 60000 to 120000 which corrsponds to 60Mhz system clock.

I found in user.h #define USER_SYSTEM_FREQ_MHz (60.0) and I changed to 90.0 but nothing changed.

How to change system clock to 90Mhz ?

Thank you,

Sergiu

+1 Yanming Luo over 3 years ago

If you are using LAUNCHXL-F28069M, please check if the PLL is set as below in HAL_setParams() of hal.c file.

// Setup the PLL
HAL_setupPll(handle,PLL_ClkFreq_90_MHz);

And then set USER_SYSTEM_FREQ_MHz to 90 as below in user.h accordingly.

//! \brief Defines the system clock frequency, MHz
#define USER_SYSTEM_FREQ_MHz (90.0)

0 Sergiu Sieber over 3 years ago

Hello Yanming,

Problem solved. HAL_setupPll was at 60_Mhz.

Thank you very much for your help.

Sergiu

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