topic Re: 56F84786-AD initial time in Digital Signal Controllers

56F84786-AD initial time

david_lin — Sat, 22 May 2021 11:23:50 GMT

Hi,

I’m debugging the SW on chip 56F84786 .My AD is initialized by PWM val0 output-trigger0. I want to change my AD sample initial time,but I cannot change the PWM val0 value because val0 value has been used by other trigger function. And I also cannot use PWM val1,PWM val2,PWM val3,PWM val4,PWM val5.Can you give some advice?

Re: 56F84786-AD initial time

david_lin — Sat, 22 May 2021 11:28:08 GMT

Re: 56F84786-AD initial time

xiangjun_rong — Mon, 24 May 2021 03:06:16 GMT

Hi, Lin,

I do not know if your ADC triggering signal is required to synchronize with PWM signal from your application requirement.

If it is not required, I suppose that you use ADC12 module, in the case, the ADCA trigger signal is XBAR_OUT12, you can select any signal from the Table 3-6. XBARA and XBARB Inputs in MC56F847xxRM.pdf

If the ADC trigger signal is required to synchronize with PWM signal, and all the PWM VALx are used, in the case it is complex. I do not know if the PWMB module is used, if it is not used, you can synchronize the PWMA and PWMB, use PWMB val0 register to trigger ADC, in the case, the PWMA PWM signals will synchronize with ADC triggering signal.

Hope it can help you

XiangJun Rong