MSP430G2955: timer problem does not count external clocks from certain pin oscillator

Hello Ryan,

thank you for your answer,

-i am still having trouble to undesrand what is TA0.0 TA0.1 and TA0.2 i mean what are they? i understood from your comment that they are pins but i don't find them in the Figure 12-1. Timer_A Block Diagram of slau144j.pdf, i understand that the 3 refers to 03 capture/compare channel that the timer has.

-according to what you said (TA0CLK: Optional input clock source for TA0, selectable through the TASSELx bits of the TACTL register.) how can i connect the pin P1.1 to timer0_A3 using the TASSELx bits of the TACTL register? ihave done it for pin P1.0 and works perfecly as you can sse in the code below but have no idea for P1.1, because in Table 12. Timer0_A3 Signal Connections i see that there are difference between them .

-thank you for the link of the library, i am on it now but i want to understand the routing of signla for the pins so i understand ver well the library without using it blindly and not understanding how the registers are set an their roles.

TA0CTL =TASSEL_0|ID_3|MC_2|TACLR;               
TA0CCTL0 =CM_3|CCIS_2|CAP;

Hello Ryan,

thank you of the advice for the timer,it was helpfull. so to make sure that i am not in understand it. it is not only the pin P1.0 which can be assigned as clock input for the timer0_A3 (TAR). so what are they doing in the capacitive touch library is first set the timer input clock to external as shown below:

TA0CTL =TASSEL_0|ID_3|MC_2|TACLR;

secondly setting the P1SEL and P2SEL like following:

P1DIR &= ~ BIT1;                    //P1.1

P1SEL &= ~ BIT1;

P1SEL2 |= BIT1;                            // activating the pin oscillation

this should feed the timer0_A3 by the pin oscillation

here i have a pic of what i understood

Yes as you can see in the picture, i did it for P1.0 without using the comparator, my method for P1.0 works perfectly nice without using the comparaor because i use the ethod given in this link: