# example_read_radio_GPIO_pins.c File Reference

Resets Radio, configures the GPIO pins as inputs, then reads out the value of these pins to console once per second, between 0x00 (all low) to 0x0F (all high). To test, start this application then connect one or more GPIO pins to GND. You will see the value change accordingly. More...

`#include "../HAL/hal.h"`
`#include "../ZNP/znp_interface.h"`

signed int | znpResult
int | main (void)

## Detailed Description

Resets Radio, configures the GPIO pins as inputs, then reads out the value of these pins to console once per second, between 0x00 (all low) to 0x0F (all high). To test, start this application then connect one or more GPIO pins to GND. You will see the value change accordingly.

The CC2530ZNP supports four General Purpose Input/Output (GPIO) pins. Pins can be individually configured as:

- Inputs
- Outputs
- Tri-State When configured as an input, the pin will have either a pull-up resistor or pull-down resistor.

Note:
  The GPIO pins are not exposed on the CC2530ZNP target board

See also:
  http://processors.wiki.ti.com/index.php/Tutorial_on_the_Examples and http://e2e.ti.com/support/low_power_rf/default.aspx

Rev
  587

Author
  dsmith

Date
  2010-06-11 10:17:52 -0700 (Fri, 11 Jun 2010)

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