CC2530 - Configuring Port0 as II/O

Reza Filsoof

Other Parts Discussed in Thread: CC2530

Hey guys,

I'm trying to configure PORT0 as output general purpose pin. My main goal is to write a logic one to a pin and test with a scope that it actually changes.

I'm using the following code at the moment:

    //config General-Purpose I/O
    P0SEL = 0;       //Port 0 function-select register
    P0DIR = 0;       //Port 0 direction register

could you please let me what i'm doing wrong.

Thanks,

Reza

over 12 years ago

0 YiKai Chen over 12 years ago

Guru 735685 points

Hi,

You need to decide which pin you want to be GPIO and do the settings accordingly.

For example, if you want to use P0 pin 6 as GPO, you can use the following code to do that.

P0SEL &=(~BV(6)); //Set pin6 to GPIO function

P0DIR |= BV(6); //Set pin6 to GPO.

P0.6=1; //Set pin 6 to output high

P0.6=0; //Set pin 6 to output low

0 Reza Filsoof over 12 years ago in reply to YiKai Chen

Prodigy 90 points

Thanks alot Yikai Chen,

I'm still trying to figure out the "BV" and the meaning of your code.

Also setting up the pin 6 to output high or low was done by using P0_1 instead of P0.1.

Do you know what the maximum input voltage that the GPI pins can take is?

thanks again,

-Reza

0 YiKai Chen over 12 years ago in reply to Reza Filsoof

Guru 735685 points

The GPI pins can not take more than 3.9V accordingly to the CC2530 datasheet and I will suggest not more than 3.6 for safety.

0 Fredrik K over 12 years ago in reply to YiKai Chen

TI__Guru** 106705 points

BV(6) means Bit Value 6 and is the same as setting the 6th bit: 0b01000000 (which is the same as 0x40).

The maximum rating of the GPIO pins is VDD + 0.3V, so the pin can only take 3.9 if VDD is 3.6V.

/Fredrik

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CC2530 - Configuring Port0 as II/O