Difference between revisions of "GPIO Interface"
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Revision as of 01:37, 17 November 2012
This article shows how to use one of the pins on the SJ-One board as either an INPUT or OUTPUT pin.
Steps
Check to see if you have gpio.hpp in your project's L4_IO directory, if not, follow these steps :
- Grab the GPIO header file from SourceForge SourceForge SJ-One Project
- You will get the gpio.hpp file
- Put this in your Project's L4_IO directory
To use a pin for GPIO, see the source code example below :
/// Include the GPIO file
#include "gpio.hpp"
int main(void)
{
/**
* Locate a pin on your board that you'd
* like to use either as INPUT or OUTPUT
* Let's use P1.19 (as labeled on the Board)
*
* You can use any other pins as defined by
* LPC1758_GPIO enumeration at gpio.hpp file.
*/
GPIO myPin(P1_19); // Control P1.19
myPin.setAsOutput(); // Use the pin as output pin
// Let's blink an LED on P1.19 :
while(1) {
myPin.setHigh(); // Pin will now be at 3.3v
delay_ms(100);
myPin.setLow(); // Pin will now be at 0.0v
delay_ms(100);
}
return 0;
}
