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Rock3/CM/CM3I/E25/GPIO

< Rock3‎ | CM‎ | CM3I‎ | E25
     ROCK 3 >  Compute Module >  CM3 Industrial  >  Radxa E25 >  GPIO

General purpose input-output (GPIO) connector

Radxa E25 V1.3 has a 10-pin expansion header.

Pin# Function1 Function2 Function3 Function4 Gpionumber
1 GPIO0_B4 CAN0_RX_M0 I2C1_SDA 12
2 GPIO3_C2 SPI1_MISO_M1 UART5_TX_M1 I2S1_SDO3_M2 114
3 GPIO3_C3 SPI1_CLK_M1 UART5_RX_M1 I2S1_SCLK_RX_M2 115
4 GPIO3_C0 PWM13_M0 UART3_RX_M1 112
5 GND
6 GPIO1_A1 CAN1_TX_M0 UART3_TX_M0 I2C3_SCL_M0 33
7 GPIO1_A0 CAN1_RX_M0 UART3_RX_M0 I2C3_SDA_M0 32
8 GPIO3_A1 SPI1_CS0_M1 97
9 GPIO3_C1 I2S1_SDO2_M2 SPI1_MOSI_M1 113
10 GPIO0_B3 CAN0_TX_M0 I2C1_SCL 11

Radxa E25 V1.4 has a 26-pin expansion header.

E25 V1.4
Gpio number Function5 Function4 Function3 Function2 Function1 GPIO PIN26 GPIO Function1 Function2 Function3 Function4 Function5 Gpio number
+3.3V 1 2 +5V
32 I2C3_SDA_M0 CAN1_RX_M0 UART3_RX_M0 GPIO1_A0 3 4 +5V
33 I2C3_SCL_M0 CAN1_TX_M0 UART3_TX_M0 GPIO1_A1 5 6 GND
111 UART3_TX_M1 PWM12_M0 GPIO3_B7 7 8 GPIO3_C2 SPI1_MISO_M1 UART5_TX_M1 I2S1_SDO3_M2 114
GND 9 10 GPIO3_C3 SPI1_CLK_M1 UART5_RX_M1 I2S1_SCLK_RX_M2 115
116 UART7_TX_M1 PWM14_M0 GPIO3_C4 11 12 GPIO3_A3 99
117 I2S1_LRCK_RX_M2 UART7_RX_M1 PWM15_IR_M0 GPIO3_C5 13 14 GND
113 I2S1_SDO2_M2 SPI1_MOSI_M1 GPIO3_C1 15 16 GPIO2_D2 SPI0_CSO_M1 I2S1_LRCK_TX_M2 90
97 SPI1_CSO_M1 GPIO3_A1 17 18 GPIO0_C6 SPI0_CS0_M0 PWM7_IR 22
89 I2S1_SCLK_TX_M2 SPI0_MOSI_M1 GPIO2_D1 19 20 GND
88 I2S1_MCLK_M2 SPI0_MISO_M1 GPIO2_D0 21 22 SARADC_VIN5
91 I2S1_SDI0_M2 SPI0_CLK_M1 GPIO2_D3 23 24 GPIO4_C6 PWM13_M1 150
GND 25 26 GPIO3_C0 PWM13_M0 UART3_RX_M1 112

More details about 10-pin Header In V1.3

  • PWM;x1; PWM13
  • SPI: x1; PSI1
  • I2C: x2;I2C1/I2C3
  • UART: x2;UART3/UART5
  • CAN: x1;CAN0

More details about 24-pin Header In V1.4

  • PWM;x6; PWM7_IR/PWM12_M0/PWM13_M0/PWM13_M1/PWM14_M0/PWM15_IR_M0
  • SPI: x2; SPI0/SPI1
  • I2C: x1;I2C3_M0
  • UART: x3;UART3_M0/UART3_M1/UART5_M1
  • CAN: x1;CAN1_M0

GPIO number

Rockchip RK3568 GPIO has 5 banks, GPIO0 to GPIO4, each bank has 32pins, naming as below:

GPIO0_A0 ~ A7 
GPIO0_B0 ~ B7
GPIO0_C0 ~ C7
GPIO0_D0 ~ D7
   
GPIO1_A0 ~ A7
....
GPIO1_D0 ~ D7

For Rockchip 4.19 kernel, the GPIO number can be calculated as below, take GPIO3_C2 (PIN2 on 10-PIN HEADER) as an example:

GPIO3_C2 = 3*32 + 2*8 + 2 = 114 
(A=0, B=1, C=2, D=3)

To set GPIO3_C2 output

cd /sys/class/gpio
echo 114> export
cd gpio114
echo out > direction
echo 1 > value     # output high
echo 0 > value     # output low