TMS320F28377S: Using SFRA Without SFRA GUI Integration

Evelyn,

there must be some challenge in intergrating the library, 

1. Please make sure SFRA inject and collect are being called in the ISR 

2. Are you using the TMU version of the library, if not i will recommend using TMU version of the library

-Manish

Hello Manish,

1. Yes, both inject and collect are called in the PWM Update ISR. Every time the ISR is run, the variable duty_pu (representing the perturbed duty cycle) is updated by SFRA_F32_inject. I guess that the collect function doesn't work as it should. 

       duty_pu_DC = 0.25; // for test purposes 
       duty_pu = SFRA_F32_inject(duty_pu_DC);
       //DAC_vSetDacA((Uint32)&duty_pu_DC,4095,0);
       PWMEMU_stPWM_MasterSlaveControl.stDuty.PWMEMU_Duty_Cycle_Slave4 = duty_pu*100; // update PWM duty cycle Q1
       PWMEMU_stPWM_MasterSlaveControl.stDuty.PWMEMU_Duty_Cycle_Slave1 = duty_pu*100; // update PWM duty cycle Q2
       SFRA_F32_collect(&duty_pu , &ADC_stADCResult.fV12_U_OUT);

2. I am using the TMU COFF version of the SFRA library, as shown below:

Evelyn

Hello Manish,

Yes, the duty_pu is changing every time when inject function is called. The state remains 2 (I have seen in another sample project using the SFRA library, that this state variable changes quite often between 1 and 5 when SFRA is performed). I used the typecasting you suggested, but the problem still remains.

Hello Manish,

I made the SFRA work. I have made one big mistake: the background task was running faster than the PWM update ISR. 

Thank you again for your help!