PWM generation using MPC5744P FlexPWM - Bit numbering while debugging in S32DS

azeemsha_poyil — Thu, 07 Mar 2019 17:22:26 GMT

I am working on PWM generation using MPC5744P FlexPWM. As seen in the datasheet (see the image 2 attached) the INDEP bit comes at bit 2 of the control register 'FlexPWM_SUBn_CTRL2'.

However, when I debug using S32 Design Studio, the INDEP bit is shown at bit 13 (see image 1). This is confusing to me.

Hence I am forced to configure the register as below,

FlexPWM_0.SUB[0].CTRL2.R = 0x2000; // independent outputs

Could anyone please help to understand this?

Regards

Re: PWM generation using MPC5744P FlexPWM - Bit numbering while debugging in S32DS

PetrS — Fri, 08 Mar 2019 09:20:35 GMT

Hi,

the S32DS only uses reversed bit numbering. The RM shows standard PowerPC bit numbering: bit 0 is the most significant bit, and bit 15 is the least significant bit.

However position of the INDEP bit is same in the register.

FlexPWM_0.SUB[0].CTRL2.R = 0x2000; is correct usage.

BR, Petr

MPC5xxxのトピックPWM generation using MPC5744P FlexPWM - Bit numbering while debugging in S32DS

PWM generation using MPC5744P FlexPWM - Bit numbering while debugging in S32DS

Re: PWM generation using MPC5744P FlexPWM - Bit numbering while debugging in S32DS