My work target:
At the middle point of FlexPWM0_B2 to trigger CTU to trigger the ADC commands.
Motc_Clk:
160Mhz
PWM setting:
Centered aligned
prescaler:PRESC_1
CTU setting:
prescaler:PRESC_4
Method1: Set PWM0_B2 VAL0 output trigger to CTU
Issues: I found CTU trigger is not in the middle of FlexPWM0_B2 (No CTU TCR0V=0)
Question: Why VAL0 output trigger is not in the middle of FlexPWM?
Method2: Set PWM0_B2 VAL4 output trigger to CTU
Issues:
When I set VAL4 output trigger to CTU, I found the TCR0V needed to be varied with PWM period and dutycyle.
Question:
So how to set TCR0V according to PWM prescaler,PWM period and dutycyle and CTU prescaler? For example,PWM frequency 20Khz,50% duty cyle.
Solved! Go to Solution.
Hi,
Set the same prescaler for both the PWM and CTU’s TGS counters. TGS counter starts from TGSCRR up to TGSCCR and is reloaded at MRS. So you can set TGSCRR=0 and TGSCCR equal to PWM period. Then is VAL0 is used for MRS generation, and T0CR = 0 you should get T0 trigger generation at the time of VAL0 compare.
BR, Petr
Hi,
Set the same prescaler for both the PWM and CTU’s TGS counters. TGS counter starts from TGSCRR up to TGSCCR and is reloaded at MRS. So you can set TGSCRR=0 and TGSCCR equal to PWM period. Then is VAL0 is used for MRS generation, and T0CR = 0 you should get T0 trigger generation at the time of VAL0 compare.
BR, Petr