mrm827915

My board has been soldered~~Thank you for your careful explanation~:kiss:

常见泽1

You're welcome. Let's study together.

ltsylei

Very good, I am going to try it. I think the confusion I have had these two days can be solved. Thank you Changjianze

hai312546

Thank you so much OP:)

yuhansong

MSP430G2553 is totally OK, thanks to the host, but why do we need to turn on the pull-up resistor?

lihangjin

P1REN |= BIT3; //Turn on the pull-up. There is no pull-up resistor on the circuit board. The trigger edge is from high level to low level. What does P1REN mean in this sentence? I am using a 149 board and there is no such thing in the register. Please give me some advice! !

doumiaoya

Should I change the 1fff in for to be larger? I changed it to ffff and there is no problem, but there will be a slight delay.

常见泽1

You can change the value to a smaller value and see if it is larger than 1ff. This is too old. I don’t even remember it. It’s been more than a year.

bumbdong

Just asking, I am using 2553, and it is said that some of the problems are probably caused by different interrupt initialization functions. I use IAR, and the interrupt initialization function is __enable_interrupt(); Now there is a problem, that is, each IO port of 430 can be used as an IO port interrupt, so if other IO ports generate interrupts when executing a certain IO interrupt, how to determine the priority?