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Difference between revisions of "Rock/GPIO"

(pin numbers)
Line 122: Line 122:
  
 
==pin numbers ==
 
==pin numbers ==
<syntaxhighlight lang="c" enclose="div">
+
Pin number for kernel 3.0.36 starts from 160. For kernel version 3.10 and later(device tree based), the pin number starts from 0.
#define      NUM_GROUP 32
+
===Kernel 3.0.36===
#define      PIN_BASE            160
+
<pre>
 
+
GPIO0_A0 = 160
#define RK30_PIN0_PA0 (0*NUM_GROUP + PIN_BASE + 0)
+
GPIO0_A1 = 161
#define RK30_PIN0_PA1 (0*NUM_GROUP + PIN_BASE + 1)
+
GPIO0_A2 = 162
#define RK30_PIN0_PA2 (0*NUM_GROUP + PIN_BASE + 2)
+
GPIO0_A3 = 163
#define RK30_PIN0_PA3 (0*NUM_GROUP + PIN_BASE + 3)
+
GPIO0_A4 = 164
#define RK30_PIN0_PA4 (0*NUM_GROUP + PIN_BASE + 4)
+
GPIO0_A5 = 165
#define RK30_PIN0_PA5 (0*NUM_GROUP + PIN_BASE + 5)
+
GPIO0_A6 = 166
#define RK30_PIN0_PA6 (0*NUM_GROUP + PIN_BASE + 6)
+
GPIO0_A7 = 167
#define RK30_PIN0_PA7 (0*NUM_GROUP + PIN_BASE + 7)
+
GPIO0_B0 = 168
#define RK30_PIN0_PB0 (0*NUM_GROUP + PIN_BASE + 8)
+
GPIO0_B1 = 169
#define RK30_PIN0_PB1 (0*NUM_GROUP + PIN_BASE + 9)
+
GPIO0_B2 = 170
#define RK30_PIN0_PB2 (0*NUM_GROUP + PIN_BASE + 10)
+
GPIO0_B3 = 171
#define RK30_PIN0_PB3 (0*NUM_GROUP + PIN_BASE + 11)
+
GPIO0_B4 = 172
#define RK30_PIN0_PB4 (0*NUM_GROUP + PIN_BASE + 12)
+
GPIO0_B5 = 173
#define RK30_PIN0_PB5 (0*NUM_GROUP + PIN_BASE + 13)
+
GPIO0_B6 = 174
#define RK30_PIN0_PB6 (0*NUM_GROUP + PIN_BASE + 14)
+
GPIO0_B7 = 175
#define RK30_PIN0_PB7 (0*NUM_GROUP + PIN_BASE + 15)
+
GPIO0_C0 = 176
#define RK30_PIN0_PC0 (0*NUM_GROUP + PIN_BASE + 16)
+
GPIO0_C1 = 177
#define RK30_PIN0_PC1 (0*NUM_GROUP + PIN_BASE + 17)
+
GPIO0_C2 = 178
#define RK30_PIN0_PC2 (0*NUM_GROUP + PIN_BASE + 18)
+
GPIO0_C3 = 179
#define RK30_PIN0_PC3 (0*NUM_GROUP + PIN_BASE + 19)
+
GPIO0_C4 = 180
#define RK30_PIN0_PC4 (0*NUM_GROUP + PIN_BASE + 20)
+
GPIO0_C5 = 181
#define RK30_PIN0_PC5 (0*NUM_GROUP + PIN_BASE + 21)
+
GPIO0_C6 = 182
#define RK30_PIN0_PC6 (0*NUM_GROUP + PIN_BASE + 22)
+
GPIO0_C7 = 183
#define RK30_PIN0_PC7 (0*NUM_GROUP + PIN_BASE + 23)
+
GPIO0_D0 = 184
#define RK30_PIN0_PD0 (0*NUM_GROUP + PIN_BASE + 24)
+
GPIO0_D1 = 185
#define RK30_PIN0_PD1 (0*NUM_GROUP + PIN_BASE + 25)
+
GPIO0_D2 = 186
#define RK30_PIN0_PD2 (0*NUM_GROUP + PIN_BASE + 26)
+
GPIO0_D3 = 187
#define RK30_PIN0_PD3 (0*NUM_GROUP + PIN_BASE + 27)
+
GPIO0_D4 = 188
#define RK30_PIN0_PD4 (0*NUM_GROUP + PIN_BASE + 28)
+
GPIO0_D5 = 189
#define RK30_PIN0_PD5 (0*NUM_GROUP + PIN_BASE + 29)
+
GPIO0_D6 = 190
#define RK30_PIN0_PD6 (0*NUM_GROUP + PIN_BASE + 30)
+
GPIO0_D7 = 191
#define RK30_PIN0_PD7 (0*NUM_GROUP + PIN_BASE + 31)
+
GPIO1_A0 = 192
 
+
GPIO1_A1 = 193
#define RK30_PIN1_PA0 (1*NUM_GROUP + PIN_BASE + 0)
+
GPIO1_A2 = 194
#define RK30_PIN1_PA1 (1*NUM_GROUP + PIN_BASE + 1)
+
GPIO1_A3 = 195
#define RK30_PIN1_PA2 (1*NUM_GROUP + PIN_BASE + 2)
+
GPIO1_A4 = 196
#define RK30_PIN1_PA3 (1*NUM_GROUP + PIN_BASE + 3)
+
GPIO1_A5 = 197
#define RK30_PIN1_PA4 (1*NUM_GROUP + PIN_BASE + 4)
+
GPIO1_A6 = 198
#define RK30_PIN1_PA5 (1*NUM_GROUP + PIN_BASE + 5)
+
GPIO1_A7 = 199
#define RK30_PIN1_PA6 (1*NUM_GROUP + PIN_BASE + 6)
+
GPIO1_B0 = 200
#define RK30_PIN1_PA7 (1*NUM_GROUP + PIN_BASE + 7)
+
GPIO1_B1 = 201
#define RK30_PIN1_PB0 (1*NUM_GROUP + PIN_BASE + 8)
+
GPIO1_B2 = 202
#define RK30_PIN1_PB1 (1*NUM_GROUP + PIN_BASE + 9)
+
GPIO1_B3 = 203
#define RK30_PIN1_PB2 (1*NUM_GROUP + PIN_BASE + 10)
+
GPIO1_B4 = 204
#define RK30_PIN1_PB3 (1*NUM_GROUP + PIN_BASE + 11)
+
GPIO1_B5 = 205
#define RK30_PIN1_PB4 (1*NUM_GROUP + PIN_BASE + 12)
+
GPIO1_B6 = 206
#define RK30_PIN1_PB5 (1*NUM_GROUP + PIN_BASE + 13)
+
GPIO1_B7 = 207
#define RK30_PIN1_PB6 (1*NUM_GROUP + PIN_BASE + 14)
+
GPIO1_C0 = 208
#define RK30_PIN1_PB7 (1*NUM_GROUP + PIN_BASE + 15)
+
GPIO1_C1 = 209
#define RK30_PIN1_PC0 (1*NUM_GROUP + PIN_BASE + 16)
+
GPIO1_C2 = 210
#define RK30_PIN1_PC1 (1*NUM_GROUP + PIN_BASE + 17)
+
GPIO1_C3 = 211
#define RK30_PIN1_PC2 (1*NUM_GROUP + PIN_BASE + 18)
+
GPIO1_C4 = 212
#define RK30_PIN1_PC3 (1*NUM_GROUP + PIN_BASE + 19)
+
GPIO1_C5 = 213
#define RK30_PIN1_PC4 (1*NUM_GROUP + PIN_BASE + 20)
+
GPIO1_C6 = 214
#define RK30_PIN1_PC5 (1*NUM_GROUP + PIN_BASE + 21)
+
GPIO1_C7 = 215
#define RK30_PIN1_PC6 (1*NUM_GROUP + PIN_BASE + 22)
+
GPIO1_D0 = 216
#define RK30_PIN1_PC7 (1*NUM_GROUP + PIN_BASE + 23)
+
GPIO1_D1 = 217
#define RK30_PIN1_PD0 (1*NUM_GROUP + PIN_BASE + 24)
+
GPIO1_D2 = 218
#define RK30_PIN1_PD1 (1*NUM_GROUP + PIN_BASE + 25)
+
GPIO1_D3 = 219
#define RK30_PIN1_PD2 (1*NUM_GROUP + PIN_BASE + 26)
+
GPIO1_D4 = 220
#define RK30_PIN1_PD3 (1*NUM_GROUP + PIN_BASE + 27)
+
GPIO1_D5 = 221
#define RK30_PIN1_PD4 (1*NUM_GROUP + PIN_BASE + 28)
+
GPIO1_D6 = 222
#define RK30_PIN1_PD5 (1*NUM_GROUP + PIN_BASE + 29)
+
GPIO1_D7 = 223
#define RK30_PIN1_PD6 (1*NUM_GROUP + PIN_BASE + 30)
+
GPIO2_A0 = 224
#define RK30_PIN1_PD7 (1*NUM_GROUP + PIN_BASE + 31)
+
GPIO2_A1 = 225
 
+
GPIO2_A2 = 226
#define RK30_PIN2_PA0 (2*NUM_GROUP + PIN_BASE + 0)
+
GPIO2_A3 = 227
#define RK30_PIN2_PA1 (2*NUM_GROUP + PIN_BASE + 1)
+
GPIO2_A4 = 228
#define RK30_PIN2_PA2 (2*NUM_GROUP + PIN_BASE + 2)
+
GPIO2_A5 = 229
#define RK30_PIN2_PA3 (2*NUM_GROUP + PIN_BASE + 3)
+
GPIO2_A6 = 230
#define RK30_PIN2_PA4 (2*NUM_GROUP + PIN_BASE + 4)
+
GPIO2_A7 = 231
#define RK30_PIN2_PA5 (2*NUM_GROUP + PIN_BASE + 5)
+
GPIO2_B0 = 232
#define RK30_PIN2_PA6 (2*NUM_GROUP + PIN_BASE + 6)
+
GPIO2_B1 = 233
#define RK30_PIN2_PA7 (2*NUM_GROUP + PIN_BASE + 7)
+
GPIO2_B2 = 234
#define RK30_PIN2_PB0 (2*NUM_GROUP + PIN_BASE + 8)
+
GPIO2_B3 = 235
#define RK30_PIN2_PB1 (2*NUM_GROUP + PIN_BASE + 9)
+
GPIO2_B4 = 236
#define RK30_PIN2_PB2 (2*NUM_GROUP + PIN_BASE + 10)
+
GPIO2_B5 = 237
#define RK30_PIN2_PB3 (2*NUM_GROUP + PIN_BASE + 11)
+
GPIO2_B6 = 238
#define RK30_PIN2_PB4 (2*NUM_GROUP + PIN_BASE + 12)
+
GPIO2_B7 = 239
#define RK30_PIN2_PB5 (2*NUM_GROUP + PIN_BASE + 13)
+
GPIO2_C0 = 240
#define RK30_PIN2_PB6 (2*NUM_GROUP + PIN_BASE + 14)
+
GPIO2_C1 = 241
#define RK30_PIN2_PB7 (2*NUM_GROUP + PIN_BASE + 15)
+
GPIO2_C2 = 242
#define RK30_PIN2_PC0 (2*NUM_GROUP + PIN_BASE + 16)
+
GPIO2_C3 = 243
#define RK30_PIN2_PC1 (2*NUM_GROUP + PIN_BASE + 17)
+
GPIO2_C4 = 244
#define RK30_PIN2_PC2 (2*NUM_GROUP + PIN_BASE + 18)
+
GPIO2_C5 = 245
#define RK30_PIN2_PC3 (2*NUM_GROUP + PIN_BASE + 19)
+
GPIO2_C6 = 246
#define RK30_PIN2_PC4 (2*NUM_GROUP + PIN_BASE + 20)
+
GPIO2_C7 = 247
#define RK30_PIN2_PC5 (2*NUM_GROUP + PIN_BASE + 21)
+
GPIO2_D0 = 248
#define RK30_PIN2_PC6 (2*NUM_GROUP + PIN_BASE + 22)
+
GPIO2_D1 = 249
#define RK30_PIN2_PC7 (2*NUM_GROUP + PIN_BASE + 23)
+
GPIO2_D2 = 250
#define RK30_PIN2_PD0 (2*NUM_GROUP + PIN_BASE + 24)
+
GPIO2_D3 = 251
#define RK30_PIN2_PD1 (2*NUM_GROUP + PIN_BASE + 25)
+
GPIO2_D4 = 252
#define RK30_PIN2_PD2 (2*NUM_GROUP + PIN_BASE + 26)
+
GPIO2_D5 = 253
#define RK30_PIN2_PD3 (2*NUM_GROUP + PIN_BASE + 27)
+
GPIO2_D6 = 254
#define RK30_PIN2_PD4 (2*NUM_GROUP + PIN_BASE + 28)
+
GPIO2_D7 = 255
#define RK30_PIN2_PD5 (2*NUM_GROUP + PIN_BASE + 29)
+
GPIO3_A0 = 256
#define RK30_PIN2_PD6 (2*NUM_GROUP + PIN_BASE + 30)
+
GPIO3_A1 = 257
#define RK30_PIN2_PD7 (2*NUM_GROUP + PIN_BASE + 31)
+
GPIO3_A2 = 258
 
+
GPIO3_A3 = 259
#define RK30_PIN3_PA0 (3*NUM_GROUP + PIN_BASE + 0)
+
GPIO3_A4 = 260
#define RK30_PIN3_PA1 (3*NUM_GROUP + PIN_BASE + 1)
+
GPIO3_A5 = 261
#define RK30_PIN3_PA2 (3*NUM_GROUP + PIN_BASE + 2)
+
GPIO3_A6 = 262
#define RK30_PIN3_PA3 (3*NUM_GROUP + PIN_BASE + 3)
+
GPIO3_A7 = 263
#define RK30_PIN3_PA4 (3*NUM_GROUP + PIN_BASE + 4)
+
GPIO3_B0 = 264
#define RK30_PIN3_PA5 (3*NUM_GROUP + PIN_BASE + 5)
+
GPIO3_B1 = 265
#define RK30_PIN3_PA6 (3*NUM_GROUP + PIN_BASE + 6)
+
GPIO3_B2 = 266
#define RK30_PIN3_PA7 (3*NUM_GROUP + PIN_BASE + 7)
+
GPIO3_B3 = 267
#define RK30_PIN3_PB0 (3*NUM_GROUP + PIN_BASE + 8)
+
GPIO3_B4 = 268
#define RK30_PIN3_PB1 (3*NUM_GROUP + PIN_BASE + 9)
+
GPIO3_B5 = 269
#define RK30_PIN3_PB2 (3*NUM_GROUP + PIN_BASE + 10)
+
GPIO3_B6 = 270
#define RK30_PIN3_PB3 (3*NUM_GROUP + PIN_BASE + 11)
+
GPIO3_B7 = 271
#define RK30_PIN3_PB4 (3*NUM_GROUP + PIN_BASE + 12)
+
GPIO3_C0 = 272
#define RK30_PIN3_PB5 (3*NUM_GROUP + PIN_BASE + 13)
+
GPIO3_C1 = 273
#define RK30_PIN3_PB6 (3*NUM_GROUP + PIN_BASE + 14)
+
GPIO3_C2 = 274
#define RK30_PIN3_PB7 (3*NUM_GROUP + PIN_BASE + 15)
+
GPIO3_C3 = 275
#define RK30_PIN3_PC0 (3*NUM_GROUP + PIN_BASE + 16)
+
GPIO3_C4 = 276
#define RK30_PIN3_PC1 (3*NUM_GROUP + PIN_BASE + 17)
+
GPIO3_C5 = 277
#define RK30_PIN3_PC2 (3*NUM_GROUP + PIN_BASE + 18)
+
GPIO3_C6 = 278
#define RK30_PIN3_PC3 (3*NUM_GROUP + PIN_BASE + 19)
+
GPIO3_C7 = 279
#define RK30_PIN3_PC4 (3*NUM_GROUP + PIN_BASE + 20)
+
GPIO3_D0 = 280
#define RK30_PIN3_PC5 (3*NUM_GROUP + PIN_BASE + 21)
+
GPIO3_D1 = 281
#define RK30_PIN3_PC6 (3*NUM_GROUP + PIN_BASE + 22)
+
GPIO3_D2 = 282
#define RK30_PIN3_PC7 (3*NUM_GROUP + PIN_BASE + 23)
+
GPIO3_D3 = 283
#define RK30_PIN3_PD0 (3*NUM_GROUP + PIN_BASE + 24)
+
GPIO3_D4 = 284
#define RK30_PIN3_PD1 (3*NUM_GROUP + PIN_BASE + 25)
+
GPIO3_D5 = 285
#define RK30_PIN3_PD2 (3*NUM_GROUP + PIN_BASE + 26)
+
GPIO3_D6 = 286
#define RK30_PIN3_PD3 (3*NUM_GROUP + PIN_BASE + 27)
+
GPIO3_D7 = 287
#define RK30_PIN3_PD4 (3*NUM_GROUP + PIN_BASE + 28)
+
</pre>
#define RK30_PIN3_PD5 (3*NUM_GROUP + PIN_BASE + 29)
+
===Kernel 3.10 and later===
#define RK30_PIN3_PD6 (3*NUM_GROUP + PIN_BASE + 30)
+
<pre>
#define RK30_PIN3_PD7 (3*NUM_GROUP + PIN_BASE + 31)
+
GPIO0_A0 = 0
</syntaxhighlight>
+
GPIO0_A1 = 1
 +
GPIO0_A2 = 2
 +
GPIO0_A3 = 3
 +
GPIO0_A4 = 4
 +
GPIO0_A5 = 5
 +
GPIO0_A6 = 6
 +
GPIO0_A7 = 7
 +
GPIO0_B0 = 8
 +
GPIO0_B1 = 9
 +
GPIO0_B2 = 10
 +
GPIO0_B3 = 11
 +
GPIO0_B4 = 12
 +
GPIO0_B5 = 13
 +
GPIO0_B6 = 14
 +
GPIO0_B7 = 15
 +
GPIO0_C0 = 16
 +
GPIO0_C1 = 17
 +
GPIO0_C2 = 18
 +
GPIO0_C3 = 19
 +
GPIO0_C4 = 20
 +
GPIO0_C5 = 21
 +
GPIO0_C6 = 22
 +
GPIO0_C7 = 23
 +
GPIO0_D0 = 24
 +
GPIO0_D1 = 25
 +
GPIO0_D2 = 26
 +
GPIO0_D3 = 27
 +
GPIO0_D4 = 28
 +
GPIO0_D5 = 29
 +
GPIO0_D6 = 30
 +
GPIO0_D7 = 31
 +
GPIO1_A0 = 32
 +
GPIO1_A1 = 33
 +
GPIO1_A2 = 34
 +
GPIO1_A3 = 35
 +
GPIO1_A4 = 36
 +
GPIO1_A5 = 37
 +
GPIO1_A6 = 38
 +
GPIO1_A7 = 39
 +
GPIO1_B0 = 40
 +
GPIO1_B1 = 41
 +
GPIO1_B2 = 42
 +
GPIO1_B3 = 43
 +
GPIO1_B4 = 44
 +
GPIO1_B5 = 45
 +
GPIO1_B6 = 46
 +
GPIO1_B7 = 47
 +
GPIO1_C0 = 48
 +
GPIO1_C1 = 49
 +
GPIO1_C2 = 50
 +
GPIO1_C3 = 51
 +
GPIO1_C4 = 52
 +
GPIO1_C5 = 53
 +
GPIO1_C6 = 54
 +
GPIO1_C7 = 55
 +
GPIO1_D0 = 56
 +
GPIO1_D1 = 57
 +
GPIO1_D2 = 58
 +
GPIO1_D3 = 59
 +
GPIO1_D4 = 60
 +
GPIO1_D5 = 61
 +
GPIO1_D6 = 62
 +
GPIO1_D7 = 63
 +
GPIO2_A0 = 64
 +
GPIO2_A1 = 65
 +
GPIO2_A2 = 66
 +
GPIO2_A3 = 67
 +
GPIO2_A4 = 68
 +
GPIO2_A5 = 69
 +
GPIO2_A6 = 70
 +
GPIO2_A7 = 71
 +
GPIO2_B0 = 72
 +
GPIO2_B1 = 73
 +
GPIO2_B2 = 74
 +
GPIO2_B3 = 75
 +
GPIO2_B4 = 76
 +
GPIO2_B5 = 77
 +
GPIO2_B6 = 78
 +
GPIO2_B7 = 79
 +
GPIO2_C0 = 80
 +
GPIO2_C1 = 81
 +
GPIO2_C2 = 82
 +
GPIO2_C3 = 83
 +
GPIO2_C4 = 84
 +
GPIO2_C5 = 85
 +
GPIO2_C6 = 86
 +
GPIO2_C7 = 87
 +
GPIO2_D0 = 88
 +
GPIO2_D1 = 89
 +
GPIO2_D2 = 90
 +
GPIO2_D3 = 91
 +
GPIO2_D4 = 92
 +
GPIO2_D5 = 93
 +
GPIO2_D6 = 94
 +
GPIO2_D7 = 95
 +
GPIO3_A0 = 96
 +
GPIO3_A1 = 97
 +
GPIO3_A2 = 98
 +
GPIO3_A3 = 99
 +
GPIO3_A4 = 100
 +
GPIO3_A5 = 101
 +
GPIO3_A6 = 102
 +
GPIO3_A7 = 103
 +
GPIO3_B0 = 104
 +
GPIO3_B1 = 105
 +
GPIO3_B2 = 106
 +
GPIO3_B3 = 107
 +
GPIO3_B4 = 108
 +
GPIO3_B5 = 109
 +
GPIO3_B6 = 110
 +
GPIO3_B7 = 111
 +
GPIO3_C0 = 112
 +
GPIO3_C1 = 113
 +
GPIO3_C2 = 114
 +
GPIO3_C3 = 115
 +
GPIO3_C4 = 116
 +
GPIO3_C5 = 117
 +
GPIO3_C6 = 118
 +
GPIO3_C7 = 119
 +
GPIO3_D0 = 120
 +
GPIO3_D1 = 121
 +
GPIO3_D2 = 122
 +
GPIO3_D3 = 123
 +
GPIO3_D4 = 124
 +
GPIO3_D5 = 125
 +
GPIO3_D6 = 126
 +
GPIO3_D7 = 127
 +
</pre>

Revision as of 09:04, 16 June 2015

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

wiringX is a modular approach to several GPIO interfaces. WiringX officially supports radxa rock/pro/lite, please check Rock/wiringX for how to use it.

#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

Pin number for kernel 3.0.36 starts from 160. For kernel version 3.10 and later(device tree based), the pin number starts from 0.

Kernel 3.0.36

GPIO0_A0 = 160
GPIO0_A1 = 161
GPIO0_A2 = 162
GPIO0_A3 = 163
GPIO0_A4 = 164
GPIO0_A5 = 165
GPIO0_A6 = 166
GPIO0_A7 = 167
GPIO0_B0 = 168
GPIO0_B1 = 169
GPIO0_B2 = 170
GPIO0_B3 = 171
GPIO0_B4 = 172
GPIO0_B5 = 173
GPIO0_B6 = 174
GPIO0_B7 = 175
GPIO0_C0 = 176
GPIO0_C1 = 177
GPIO0_C2 = 178
GPIO0_C3 = 179
GPIO0_C4 = 180
GPIO0_C5 = 181
GPIO0_C6 = 182
GPIO0_C7 = 183
GPIO0_D0 = 184
GPIO0_D1 = 185
GPIO0_D2 = 186
GPIO0_D3 = 187
GPIO0_D4 = 188
GPIO0_D5 = 189
GPIO0_D6 = 190
GPIO0_D7 = 191
GPIO1_A0 = 192
GPIO1_A1 = 193
GPIO1_A2 = 194
GPIO1_A3 = 195
GPIO1_A4 = 196
GPIO1_A5 = 197
GPIO1_A6 = 198
GPIO1_A7 = 199
GPIO1_B0 = 200
GPIO1_B1 = 201
GPIO1_B2 = 202
GPIO1_B3 = 203
GPIO1_B4 = 204
GPIO1_B5 = 205
GPIO1_B6 = 206
GPIO1_B7 = 207
GPIO1_C0 = 208
GPIO1_C1 = 209
GPIO1_C2 = 210
GPIO1_C3 = 211
GPIO1_C4 = 212
GPIO1_C5 = 213
GPIO1_C6 = 214
GPIO1_C7 = 215
GPIO1_D0 = 216
GPIO1_D1 = 217
GPIO1_D2 = 218
GPIO1_D3 = 219
GPIO1_D4 = 220
GPIO1_D5 = 221
GPIO1_D6 = 222
GPIO1_D7 = 223
GPIO2_A0 = 224
GPIO2_A1 = 225
GPIO2_A2 = 226
GPIO2_A3 = 227
GPIO2_A4 = 228
GPIO2_A5 = 229
GPIO2_A6 = 230
GPIO2_A7 = 231
GPIO2_B0 = 232
GPIO2_B1 = 233
GPIO2_B2 = 234
GPIO2_B3 = 235
GPIO2_B4 = 236
GPIO2_B5 = 237
GPIO2_B6 = 238
GPIO2_B7 = 239
GPIO2_C0 = 240
GPIO2_C1 = 241
GPIO2_C2 = 242
GPIO2_C3 = 243
GPIO2_C4 = 244
GPIO2_C5 = 245
GPIO2_C6 = 246
GPIO2_C7 = 247
GPIO2_D0 = 248
GPIO2_D1 = 249
GPIO2_D2 = 250
GPIO2_D3 = 251
GPIO2_D4 = 252
GPIO2_D5 = 253
GPIO2_D6 = 254
GPIO2_D7 = 255
GPIO3_A0 = 256
GPIO3_A1 = 257
GPIO3_A2 = 258
GPIO3_A3 = 259
GPIO3_A4 = 260
GPIO3_A5 = 261
GPIO3_A6 = 262
GPIO3_A7 = 263
GPIO3_B0 = 264
GPIO3_B1 = 265
GPIO3_B2 = 266
GPIO3_B3 = 267
GPIO3_B4 = 268
GPIO3_B5 = 269
GPIO3_B6 = 270
GPIO3_B7 = 271
GPIO3_C0 = 272
GPIO3_C1 = 273
GPIO3_C2 = 274
GPIO3_C3 = 275
GPIO3_C4 = 276
GPIO3_C5 = 277
GPIO3_C6 = 278
GPIO3_C7 = 279
GPIO3_D0 = 280
GPIO3_D1 = 281
GPIO3_D2 = 282
GPIO3_D3 = 283
GPIO3_D4 = 284
GPIO3_D5 = 285
GPIO3_D6 = 286
GPIO3_D7 = 287

Kernel 3.10 and later

GPIO0_A0 = 0
GPIO0_A1 = 1
GPIO0_A2 = 2
GPIO0_A3 = 3
GPIO0_A4 = 4
GPIO0_A5 = 5
GPIO0_A6 = 6
GPIO0_A7 = 7
GPIO0_B0 = 8
GPIO0_B1 = 9
GPIO0_B2 = 10
GPIO0_B3 = 11
GPIO0_B4 = 12
GPIO0_B5 = 13
GPIO0_B6 = 14
GPIO0_B7 = 15
GPIO0_C0 = 16
GPIO0_C1 = 17
GPIO0_C2 = 18
GPIO0_C3 = 19
GPIO0_C4 = 20
GPIO0_C5 = 21
GPIO0_C6 = 22
GPIO0_C7 = 23
GPIO0_D0 = 24
GPIO0_D1 = 25
GPIO0_D2 = 26
GPIO0_D3 = 27
GPIO0_D4 = 28
GPIO0_D5 = 29
GPIO0_D6 = 30
GPIO0_D7 = 31
GPIO1_A0 = 32
GPIO1_A1 = 33
GPIO1_A2 = 34
GPIO1_A3 = 35
GPIO1_A4 = 36
GPIO1_A5 = 37
GPIO1_A6 = 38
GPIO1_A7 = 39
GPIO1_B0 = 40
GPIO1_B1 = 41
GPIO1_B2 = 42
GPIO1_B3 = 43
GPIO1_B4 = 44
GPIO1_B5 = 45
GPIO1_B6 = 46
GPIO1_B7 = 47
GPIO1_C0 = 48
GPIO1_C1 = 49
GPIO1_C2 = 50
GPIO1_C3 = 51
GPIO1_C4 = 52
GPIO1_C5 = 53
GPIO1_C6 = 54
GPIO1_C7 = 55
GPIO1_D0 = 56
GPIO1_D1 = 57
GPIO1_D2 = 58
GPIO1_D3 = 59
GPIO1_D4 = 60
GPIO1_D5 = 61
GPIO1_D6 = 62
GPIO1_D7 = 63
GPIO2_A0 = 64
GPIO2_A1 = 65
GPIO2_A2 = 66
GPIO2_A3 = 67
GPIO2_A4 = 68
GPIO2_A5 = 69
GPIO2_A6 = 70
GPIO2_A7 = 71
GPIO2_B0 = 72
GPIO2_B1 = 73
GPIO2_B2 = 74
GPIO2_B3 = 75
GPIO2_B4 = 76
GPIO2_B5 = 77
GPIO2_B6 = 78
GPIO2_B7 = 79
GPIO2_C0 = 80
GPIO2_C1 = 81
GPIO2_C2 = 82
GPIO2_C3 = 83
GPIO2_C4 = 84
GPIO2_C5 = 85
GPIO2_C6 = 86
GPIO2_C7 = 87
GPIO2_D0 = 88
GPIO2_D1 = 89
GPIO2_D2 = 90
GPIO2_D3 = 91
GPIO2_D4 = 92
GPIO2_D5 = 93
GPIO2_D6 = 94
GPIO2_D7 = 95
GPIO3_A0 = 96
GPIO3_A1 = 97
GPIO3_A2 = 98
GPIO3_A3 = 99
GPIO3_A4 = 100
GPIO3_A5 = 101
GPIO3_A6 = 102
GPIO3_A7 = 103
GPIO3_B0 = 104
GPIO3_B1 = 105
GPIO3_B2 = 106
GPIO3_B3 = 107
GPIO3_B4 = 108
GPIO3_B5 = 109
GPIO3_B6 = 110
GPIO3_B7 = 111
GPIO3_C0 = 112
GPIO3_C1 = 113
GPIO3_C2 = 114
GPIO3_C3 = 115
GPIO3_C4 = 116
GPIO3_C5 = 117
GPIO3_C6 = 118
GPIO3_C7 = 119
GPIO3_D0 = 120
GPIO3_D1 = 121
GPIO3_D2 = 122
GPIO3_D3 = 123
GPIO3_D4 = 124
GPIO3_D5 = 125
GPIO3_D6 = 126
GPIO3_D7 = 127