HummingBoard Edge/Gate/CBi GPIO Pins Control

To control on the GPIO pins:

  • The external GPIOs are available under the /sys/class/gpio folder in Linux.

  • To control on the GPIO pins you need to calculate the GPIO number XX (*) and run the commands below:

# Export GPIO XX echo XX > /sys/class/gpio/export # Set GPIO pin Direction echo "out" > /sys/class/gpio/gpioXX/direction or echo "in" > /sys/class/gpio/gpioXX/direction # Set the value of an output pin echo 1 > /sys/class/gpio/gpioXX/value or echo 0 > /sys/class/gpio/gpioXX/value # Get the value of an input pin cat /sys/class/gpio/gpioXX/value # Unexport GPIO XX echo XX > /sys/class/gpio/unexport


You can calculate the GPIO number XX:
XX = linux gpio number = (gpio_bank - 1) * 32 + gpio_bit

Example: to calculate the GPIO number of pin header J1 [pin 3] 

Pad Name : DISP1_DATA0

GPIO Bank = 3

GPIO bit = 9

XX = linux gpio number = (3 - 1)*32 + 9 = 73

 

Attached here the headers schematics

36 pin header implemented using 4 headers

 

Header Pin

Pad Name

GPIO name

Linux GPIO number

Header Pin

Pad Name

GPIO name

Linux GPIO number

J21 [pin 1]

3.2V

 

 

J21 [pin 2]

5V

 

 

J21 [pin 3]

DISP1_DATA00

GPIO3_IO09

73

J21 [pin 4]

DISP1_DATA01

GPIO3_IO08

72

J21 [pin 5]

DISP1_DATA04

GPIO3_IO05

69

J21 [pin 6]

DISP1_DATA05

GPIO3_IO04

68

J23 [pin 1]

DI1_D0_CS

GPIO3_IO13

77

J23 [pin 2]

DI1_D1_CS

GPIO3_IO14

78

J23 [pin 3]

DISP1_DAT08

GPIO3_IO01

65

J23 [pin 4]

DISP1_DAT09

GPIO3_IO00

64

J23 [pin 5]

DISP1_DAT12

GPIO2_IO21

53

J23 [pin 6]

DISP1_DAT13

GPIO2_IO20

52

J23 [pin 7]

DISP1_DAT16

GPIO2_IO17

49

J23 [pin 8]

DISP1_DAT17

GPIO2_IO16

48

J23 [pin 9]

DISP1_DAT20

GPIO3_IO31

95

J23 [pin 10]

DISP1_DAT21

GPIO3_IO30

94

J23 [pin 11]

GND

 

 

J23 [pin 12]

DI1_DISP_CLK

GPIO2_IO22

54

J22 [pin 1]

DI1_PIN15

GPIO3_IO10

74

J22 [pin 2]

DISP1_DATA03

GPIO3_IO11

75

J22 [pin 3]

DISP1_DATA02

GPIO3_IO07

71

J22 [pin 4]

DISP1_DATA03

GPIO3_IO06

70

J22 [pin 5]

DISP1_DATA06

GPIO3_IO03

67

J22 [pin 6]

DISP1_DATA07

GPIO3_IO02

66

J24 [pin 1]

DI1_PIN01

GPIO3_IO15

79

J24 [pin 2]

DI1_PIN03

GPIO3_IO12

76

J24 [pin 3]

DISP1_DATA10

GPIO2_IO29

61

J24 [pin 4]

DISP1_DATA11

GPIO2_IO28

60

J24 [pin 5]

DISP1_DATA14

GPIO2_IO19

51

J24 [pin 6]

DISP1_DATA15

GPIO2_IO18

50

J24 [pin 7]

DISP1_DATA18

GPIO6_IO06

166

J24 [pin 8]

DISP1_DATA19

GPIO5_IO04

132

J24 [pin 9]

DISP1_DATA22

GPIO3_IO26

90

J24 [pin 10]

DISP1_DATA23

GPIO3_IO27

91

J24 [pin 11]

SPDIF_IN

GPIO1_IO24

24

J24 [pin 12]

SPDIF_OUT

GPIO7_IO12

204

 

SolidRun Ltd.