Please enable javascript, or click here to visit my ecommerce web site powered by Shopify.
Jump to: navigation, search

Difference between revisions of "Rock/GPIO"

(Added JavaScript (Node.js))
Line 5: Line 5:
  
 
== C ==
 
== C ==
 +
 +
https://github.com/pilight/wiringX
 +
 +
wiringX is a modular approach to several GPIO interfaces.
 +
 
<syntaxhighlight lang="c" enclose="div">
 
<syntaxhighlight lang="c" enclose="div">
  

Revision as of 02:43, 31 October 2014

Checkout the rock/extension_header page for gpios on the extension header.

Below is programming in different languages to bit flipping the GPIO on RR.

C

https://github.com/pilight/wiringX

wiringX is a modular approach to several GPIO interfaces.

#include <stdio.h>

int main()
{
  FILE *fp = fopen("/sys/class/gpio/export", "w");
  if( !fp )
  {
    printf("error open export file");
    return 1;
  }
  fprintf(fp, "%d", 172);
  fclose(fp);

  fp = fopen("/sys/class/gpio/gpio175/direction", "w");

  if( !fp )
  {
    printf("error open export file");
    return 1;
  }
  fprintf(fp, "%s", "out");
  fclose(fp);

  fp = fopen("/sys/class/gpio/gpio175/value", "w");

  if( !fp )
  {
    printf("error open export file");
    return 1;
  }
  fprintf(fp, "%d", 1);
 
}

Python

Python library. 

   sudo apt-get install gcc  python-dev
import time

def initpin(pinnum, mode):
  '''
  pinnum: pin number, eg. 172, 175 etc.
  mode: pin mode, valid values: in or out
  '''
  with open('/sys/class/gpio/export', 'w') as f:
    f.write(str(pinnum))

  with open('/sys/class/gpio/gpio' + str(pinnum) + '/direction', 'w') as f:
    f.write(str(mode))

def setpin(pinnum, value):
 
  with open('/sys/class/gpio/gpio' + str(pinnum) + '/value', 'w') as f:
    f.write(str(value))

if __name__ == '__main__':
  initpin(172, 'out')
  while True:
    setpin(172, 0)
    time.sleep(1)
    setpin(172, 1)
    time.sleep(1)

Shell

#!/bin/sh

# enable the gpio 172 -> green led
echo 172 > /sys/class/gpio/export

# set the direction to output
echo "out" > /sys/class/gpio/gpio172/direction
while true;
do
echo 0 > /sys/class/gpio/gpio172/value #led on
sleep 1
echo 1 > /sys/class/gpio/gpio172/value #led off
sleep 1
done

JavaScript (Node.js)

   Follow the directions at https://github.com/jdarling/radxa-nodejs-img
var fs = require('fs');

// Enable the GPIO 172
fs.writeFileSync('/sys/class/gpio/export', 172);

// Set it to output
fs.writeFileSync('/sys/class/gpio/gpio172/direction', 'out');

// Turn on the LED
fs.writeFileSync('/ssy/class/gpio/gpio172/value', 1);

// Wait 1 second then turn it off
setTimeout(function(){
  fs.writeFileSync('/ssy/class/gpio/gpio172/value', 0);
}, 1000);
   Or better yet, use https://github.com/jdarling/radxa-rock

pin numbers

#define      NUM_GROUP 32
#define      PIN_BASE            160

#define RK30_PIN0_PA0           (0*NUM_GROUP + PIN_BASE + 0)
#define RK30_PIN0_PA1           (0*NUM_GROUP + PIN_BASE + 1)
#define RK30_PIN0_PA2           (0*NUM_GROUP + PIN_BASE + 2)
#define RK30_PIN0_PA3           (0*NUM_GROUP + PIN_BASE + 3)
#define RK30_PIN0_PA4           (0*NUM_GROUP + PIN_BASE + 4)
#define RK30_PIN0_PA5           (0*NUM_GROUP + PIN_BASE + 5)
#define RK30_PIN0_PA6           (0*NUM_GROUP + PIN_BASE + 6)
#define RK30_PIN0_PA7           (0*NUM_GROUP + PIN_BASE + 7)
#define RK30_PIN0_PB0           (0*NUM_GROUP + PIN_BASE + 8)
#define RK30_PIN0_PB1           (0*NUM_GROUP + PIN_BASE + 9)
#define RK30_PIN0_PB2           (0*NUM_GROUP + PIN_BASE + 10)
#define RK30_PIN0_PB3           (0*NUM_GROUP + PIN_BASE + 11)
#define RK30_PIN0_PB4           (0*NUM_GROUP + PIN_BASE + 12)
#define RK30_PIN0_PB5           (0*NUM_GROUP + PIN_BASE + 13)
#define RK30_PIN0_PB6           (0*NUM_GROUP + PIN_BASE + 14)
#define RK30_PIN0_PB7           (0*NUM_GROUP + PIN_BASE + 15)
#define RK30_PIN0_PC0           (0*NUM_GROUP + PIN_BASE + 16)
#define RK30_PIN0_PC1           (0*NUM_GROUP + PIN_BASE + 17)
#define RK30_PIN0_PC2           (0*NUM_GROUP + PIN_BASE + 18)
#define RK30_PIN0_PC3           (0*NUM_GROUP + PIN_BASE + 19)
#define RK30_PIN0_PC4           (0*NUM_GROUP + PIN_BASE + 20)
#define RK30_PIN0_PC5           (0*NUM_GROUP + PIN_BASE + 21)
#define RK30_PIN0_PC6           (0*NUM_GROUP + PIN_BASE + 22)
#define RK30_PIN0_PC7           (0*NUM_GROUP + PIN_BASE + 23)
#define RK30_PIN0_PD0           (0*NUM_GROUP + PIN_BASE + 24)
#define RK30_PIN0_PD1           (0*NUM_GROUP + PIN_BASE + 25)
#define RK30_PIN0_PD2           (0*NUM_GROUP + PIN_BASE + 26)
#define RK30_PIN0_PD3           (0*NUM_GROUP + PIN_BASE + 27)
#define RK30_PIN0_PD4           (0*NUM_GROUP + PIN_BASE + 28)
#define RK30_PIN0_PD5           (0*NUM_GROUP + PIN_BASE + 29)
#define RK30_PIN0_PD6           (0*NUM_GROUP + PIN_BASE + 30)
#define RK30_PIN0_PD7           (0*NUM_GROUP + PIN_BASE + 31)

#define RK30_PIN1_PA0           (1*NUM_GROUP + PIN_BASE + 0)
#define RK30_PIN1_PA1           (1*NUM_GROUP + PIN_BASE + 1)
#define RK30_PIN1_PA2           (1*NUM_GROUP + PIN_BASE + 2)
#define RK30_PIN1_PA3           (1*NUM_GROUP + PIN_BASE + 3)
#define RK30_PIN1_PA4           (1*NUM_GROUP + PIN_BASE + 4)
#define RK30_PIN1_PA5           (1*NUM_GROUP + PIN_BASE + 5)
#define RK30_PIN1_PA6           (1*NUM_GROUP + PIN_BASE + 6)
#define RK30_PIN1_PA7           (1*NUM_GROUP + PIN_BASE + 7)
#define RK30_PIN1_PB0           (1*NUM_GROUP + PIN_BASE + 8)
#define RK30_PIN1_PB1           (1*NUM_GROUP + PIN_BASE + 9)
#define RK30_PIN1_PB2           (1*NUM_GROUP + PIN_BASE + 10)
#define RK30_PIN1_PB3           (1*NUM_GROUP + PIN_BASE + 11)
#define RK30_PIN1_PB4           (1*NUM_GROUP + PIN_BASE + 12)
#define RK30_PIN1_PB5           (1*NUM_GROUP + PIN_BASE + 13)
#define RK30_PIN1_PB6           (1*NUM_GROUP + PIN_BASE + 14)
#define RK30_PIN1_PB7           (1*NUM_GROUP + PIN_BASE + 15)
#define RK30_PIN1_PC0           (1*NUM_GROUP + PIN_BASE + 16)
#define RK30_PIN1_PC1           (1*NUM_GROUP + PIN_BASE + 17)
#define RK30_PIN1_PC2           (1*NUM_GROUP + PIN_BASE + 18)
#define RK30_PIN1_PC3           (1*NUM_GROUP + PIN_BASE + 19)
#define RK30_PIN1_PC4           (1*NUM_GROUP + PIN_BASE + 20)
#define RK30_PIN1_PC5           (1*NUM_GROUP + PIN_BASE + 21)
#define RK30_PIN1_PC6           (1*NUM_GROUP + PIN_BASE + 22)
#define RK30_PIN1_PC7           (1*NUM_GROUP + PIN_BASE + 23)
#define RK30_PIN1_PD0           (1*NUM_GROUP + PIN_BASE + 24)
#define RK30_PIN1_PD1           (1*NUM_GROUP + PIN_BASE + 25)
#define RK30_PIN1_PD2           (1*NUM_GROUP + PIN_BASE + 26)
#define RK30_PIN1_PD3           (1*NUM_GROUP + PIN_BASE + 27)
#define RK30_PIN1_PD4           (1*NUM_GROUP + PIN_BASE + 28)
#define RK30_PIN1_PD5           (1*NUM_GROUP + PIN_BASE + 29)
#define RK30_PIN1_PD6           (1*NUM_GROUP + PIN_BASE + 30)
#define RK30_PIN1_PD7           (1*NUM_GROUP + PIN_BASE + 31)

#define RK30_PIN2_PA0           (2*NUM_GROUP + PIN_BASE + 0)
#define RK30_PIN2_PA1           (2*NUM_GROUP + PIN_BASE + 1)
#define RK30_PIN2_PA2           (2*NUM_GROUP + PIN_BASE + 2)
#define RK30_PIN2_PA3           (2*NUM_GROUP + PIN_BASE + 3)
#define RK30_PIN2_PA4           (2*NUM_GROUP + PIN_BASE + 4)
#define RK30_PIN2_PA5           (2*NUM_GROUP + PIN_BASE + 5)
#define RK30_PIN2_PA6           (2*NUM_GROUP + PIN_BASE + 6)
#define RK30_PIN2_PA7           (2*NUM_GROUP + PIN_BASE + 7)
#define RK30_PIN2_PB0           (2*NUM_GROUP + PIN_BASE + 8)
#define RK30_PIN2_PB1           (2*NUM_GROUP + PIN_BASE + 9)
#define RK30_PIN2_PB2           (2*NUM_GROUP + PIN_BASE + 10)
#define RK30_PIN2_PB3           (2*NUM_GROUP + PIN_BASE + 11)
#define RK30_PIN2_PB4           (2*NUM_GROUP + PIN_BASE + 12)
#define RK30_PIN2_PB5           (2*NUM_GROUP + PIN_BASE + 13)
#define RK30_PIN2_PB6           (2*NUM_GROUP + PIN_BASE + 14)
#define RK30_PIN2_PB7           (2*NUM_GROUP + PIN_BASE + 15)
#define RK30_PIN2_PC0           (2*NUM_GROUP + PIN_BASE + 16)
#define RK30_PIN2_PC1           (2*NUM_GROUP + PIN_BASE + 17)
#define RK30_PIN2_PC2           (2*NUM_GROUP + PIN_BASE + 18)
#define RK30_PIN2_PC3           (2*NUM_GROUP + PIN_BASE + 19)
#define RK30_PIN2_PC4           (2*NUM_GROUP + PIN_BASE + 20)
#define RK30_PIN2_PC5           (2*NUM_GROUP + PIN_BASE + 21)
#define RK30_PIN2_PC6           (2*NUM_GROUP + PIN_BASE + 22)
#define RK30_PIN2_PC7           (2*NUM_GROUP + PIN_BASE + 23)
#define RK30_PIN2_PD0           (2*NUM_GROUP + PIN_BASE + 24)
#define RK30_PIN2_PD1           (2*NUM_GROUP + PIN_BASE + 25)
#define RK30_PIN2_PD2           (2*NUM_GROUP + PIN_BASE + 26)
#define RK30_PIN2_PD3           (2*NUM_GROUP + PIN_BASE + 27)
#define RK30_PIN2_PD4           (2*NUM_GROUP + PIN_BASE + 28)
#define RK30_PIN2_PD5           (2*NUM_GROUP + PIN_BASE + 29)
#define RK30_PIN2_PD6           (2*NUM_GROUP + PIN_BASE + 30)
#define RK30_PIN2_PD7           (2*NUM_GROUP + PIN_BASE + 31)

#define RK30_PIN3_PA0           (3*NUM_GROUP + PIN_BASE + 0)
#define RK30_PIN3_PA1           (3*NUM_GROUP + PIN_BASE + 1)
#define RK30_PIN3_PA2           (3*NUM_GROUP + PIN_BASE + 2)
#define RK30_PIN3_PA3           (3*NUM_GROUP + PIN_BASE + 3)
#define RK30_PIN3_PA4           (3*NUM_GROUP + PIN_BASE + 4)
#define RK30_PIN3_PA5           (3*NUM_GROUP + PIN_BASE + 5)
#define RK30_PIN3_PA6           (3*NUM_GROUP + PIN_BASE + 6)
#define RK30_PIN3_PA7           (3*NUM_GROUP + PIN_BASE + 7)
#define RK30_PIN3_PB0           (3*NUM_GROUP + PIN_BASE + 8)
#define RK30_PIN3_PB1           (3*NUM_GROUP + PIN_BASE + 9)
#define RK30_PIN3_PB2           (3*NUM_GROUP + PIN_BASE + 10)
#define RK30_PIN3_PB3           (3*NUM_GROUP + PIN_BASE + 11)
#define RK30_PIN3_PB4           (3*NUM_GROUP + PIN_BASE + 12)
#define RK30_PIN3_PB5           (3*NUM_GROUP + PIN_BASE + 13)
#define RK30_PIN3_PB6           (3*NUM_GROUP + PIN_BASE + 14)
#define RK30_PIN3_PB7           (3*NUM_GROUP + PIN_BASE + 15)
#define RK30_PIN3_PC0           (3*NUM_GROUP + PIN_BASE + 16)
#define RK30_PIN3_PC1           (3*NUM_GROUP + PIN_BASE + 17)
#define RK30_PIN3_PC2           (3*NUM_GROUP + PIN_BASE + 18)
#define RK30_PIN3_PC3           (3*NUM_GROUP + PIN_BASE + 19)
#define RK30_PIN3_PC4           (3*NUM_GROUP + PIN_BASE + 20)
#define RK30_PIN3_PC5           (3*NUM_GROUP + PIN_BASE + 21)
#define RK30_PIN3_PC6           (3*NUM_GROUP + PIN_BASE + 22)
#define RK30_PIN3_PC7           (3*NUM_GROUP + PIN_BASE + 23)
#define RK30_PIN3_PD0           (3*NUM_GROUP + PIN_BASE + 24)
#define RK30_PIN3_PD1           (3*NUM_GROUP + PIN_BASE + 25)
#define RK30_PIN3_PD2           (3*NUM_GROUP + PIN_BASE + 26)
#define RK30_PIN3_PD3           (3*NUM_GROUP + PIN_BASE + 27)
#define RK30_PIN3_PD4           (3*NUM_GROUP + PIN_BASE + 28)
#define RK30_PIN3_PD5           (3*NUM_GROUP + PIN_BASE + 29)
#define RK30_PIN3_PD6           (3*NUM_GROUP + PIN_BASE + 30)
#define RK30_PIN3_PD7           (3*NUM_GROUP + PIN_BASE + 31)
Retrieved from "https://wiki.radxa.com/mw/index.php?title=Rock/GPIO&oldid=1192"