Hi all,
I am thinking of a crazy idea to monitor battery voltage through the COMP_E module in MSP430FR6972. One of the steps is to output CEVREF to a capacitor connected with pin C1. The capacitor is used to hold the voltage of VCC through resistor ladder i.e. CEVREF. Here is my testing code.
P1SEL0 |= BIT1; P1SEL1 |= BIT1; CECTL0 = CEIPSEL_1|CEIPEN; // C1 is selected to V+ terminal CECTL1 = CEON|CEPWRMD_0|CEFDLY_1; CECTL2 = CEREFL_1|CERS_0|CERSEL|CEREF1_16|CEREF0_16|CERS_1|CESHORT;
Well, my problem is I can't get a valid voltage on C1. According to the below diagram, it should be possible, right?
