I try to configure the eTimer quadrature mode of MPC5744P according to some examples of MPC5604.
My relevant configuration code is as follows:
SIUL2.MSCR[PA14].B.IBE = 1; /* PA14: Enable pad for input - eTimer1 ch4,QEPA*/
SIUL2.IMCR.B.SSS = 1; /* eTimer1 ch4: connected to pad PA14 */
SIUL2.MSCR[PA15].B.IBE = 1; /* PA15: Enable pad for input - eTimer1 ch5，QEPB*/
SIUL2.IMCR.B.SSS = 2; /* eTimer1 ch5: connected to pad PA15 */
ETIMER_1.ENBL.R = 0x0; // disable Timer1 channels
ETIMER_1.CH.LOAD.R = 0;
ETIMER_1.CH.CNTR.R = 0;
ETIMER_1.CH.CTRL1.R = 0x8405;//Quadrature count mode,Primary Count Source:Counter #4 input pin,Count repeatedly,Continue counting to roll over,Secondary Count Source:Counter #5
ETIMER_1.ENBL.R = 0x30; // enable Timer1 channel 4,5
I have several problems:
1. Is my configuration correct?
2. Is the result of the quadrature count auto saved to the ETIMER_1.CH.CNTR.R ? Or is a interrupt needed to count?
3. If the result is auto saved to that register, does it mean that whenever I need the result, I just need to use the following code
QEP_count = ETIMER_1.CH.CNTR.R;
And I can get the result. Is that correct?
Thanks in advance.