28335 GPIO HIGH Impedance prob

user4116377

Hi,

I am working with 28335. how can I change the initial value of GPIO after complie but running the program before.

thanks

over 8 years ago

0 Gautam Iyer over 8 years ago

Guru 192875 points

Hi,

GPIO initialization is generally done in main() with other peripheral initializations. But not before program RUN.

Regards,
Gautam

0 user4116377 over 8 years ago

Prodigy 20 points

For example,

I set the GPIO19(I/O)=1. This pin isn't 1 after compile but I press the RUN button

0 Gautam Iyer over 8 years ago in reply to user4116377

Guru 192875 points

Exactly! Please go through this wiki article for more info: processors.wiki.ti.com/.../General_Purpose_IO_%28GPIO%29_FAQ_for_C2000

Regards,
Gautam

0 Subrahmanya over 8 years ago in reply to Gautam Iyer

TI__Mastermind 24095 points

During reset all GPIOs are in input mode. If you've to control the state of pin, before code execution - i.e. before configuring to output and write the value, you may have to use an external pull up/down as needed.

-Bharathi.

C2000™︎ microcontrollers

C2000 microcontrollers forum

28335 GPIO HIGH Impedance prob