please help trouble shoot code_S32DS for MPC5744P

liwuquan — Thu, 26 Oct 2017 02:49:42 GMT

NXP expert,

Please help trouble shoot code(a function and its call) below. why I got dutyU, V & W all equal to zero?

And would please provide a piece of suggested code to calculate: 4000*(19661/65535), the 3 numbers for in all integers(uint16), and the result should be integer(uint16) too, for MPC5744P motor control using S32DS.

FLEXPWM_set_duty(19661, 19661, 19661);

tBool FLEXPWM_set_duty(tU16 x, tU16 y, tU16 z){

tU16 periodCarry, dutyU, dutyV, dutyW;

dutyU = x;
dutyV = y;
dutyW = z;

periodCarry = 4000;

dutyU = (tU16)MLIB_Mul((tFloat)periodCarry, (MLIB_Div_FLT((tFloat)dutyU,(tFloat)65535)));
dutyV = (tU16)MLIB_Mul((tFloat)periodCarry, (MLIB_Div_FLT((tFloat)dutyV,(tFloat)65535)));
dutyW = (tU16)MLIB_Mul((tFloat)periodCarry, (MLIB_Div_FLT((tFloat)dutyW,(tFloat)65535)));

at this point, I got dutyU, dutyV, dutyW all equal to zero, but I am expecting them all 1200.

return (TRUE);

}

thank you very much.

Susan Li

Re: please help trouble shoot code_S32DS for MPC5744P

petervlna — Wed, 01 Nov 2017 14:11:28 GMT

Hi,

could you share your output file so I can test it?

From your description it is not possible to judge what is wrong.

Peter

topic Re: please help trouble shoot code_S32DS for MPC5744P in MPC5xxx

please help trouble shoot code_S32DS for MPC5744P

Re: please help trouble shoot code_S32DS for MPC5744P