MPC5xxx中的主题 Re: 5744 DEBUG

5744 DEBUG

海亭刘 — Thu, 27 Aug 2020 09:46:07 GMT

hello:

Actually test the execution time of each statement so slowly. My sys clk is 200MHZ.

for example:

void delay_rotor(UInt8 cycles)
{
while(cycles--);
}

when cycles=1, this code need about 5us.

I don't know why!

thanks !

petervlna — Fri, 28 Aug 2020 05:56:34 GMT

Hello,

Actually test the execution time of each statement so slowly. My sys clk is 200MHZ.

How do you measure execution time? Are you tracing instructions? or with scope or some timer?

I am not able to tell you where is the issue from your description. Could you be more specific please?

regards,

Peter

海亭刘 — Fri, 28 Aug 2020 10:14:03 GMT

HELLO:

I test the gpio