MSP430FR6972: the question about TimerA1's TA1R

Jent

Hi sir,

I feel uncertain how long the TAIR will start to count when I set "TA1CTL = TASSEL__ACLK | MC__UP;" and how long the TA1R will stop counting when I set "TA1CTL = TASSEL__ACLK | MC__STOP".

for example

TA1CTL = TASSEL__ACLK | MC__STOP;
temp =TA1R;
TA1CTL = TASSEL__ACLK | MC__UP;

Did the TimerA1 be stoped and TA1R be stoped counting when I read TA1R?

Did the TA1R start to count right now when I set TimerA to start ?

how long time will wait in the above two cases?

over 9 years ago

0 Dennis Eichmann over 9 years ago

Guru 74080 points

Hi Jent!

OR-ing MC__STOP has no effect because it is binary 0. You can use

TA1CTL = MC__STOP;

instead.

Dennis

0 Jent over 9 years ago in reply to Dennis Eichmann

Intellectual 660 points

Hi Dennis ,

I take it carefully and I find the code "TA1CTL = TASSEL__ACLK | MC__STOP; " is correct.It could stop TimerA1.

"TA1CTL |= TASSEL__ACLK | MC__STOP;" MC_STOP has no effect !!!

Jent

0 Dennis Eichmann over 9 years ago in reply to Jent

Guru 74080 points

Oops, sorry, this is my fault. Somehow I saw a "|=" after TA1CTL, but it is "=". Have to look more carefully!

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MSP430FR6972: the question about TimerA1's TA1R