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Rock3/CM3p/e25/GPIO

    ROCK 3 >  Hardware >  Radxa E25 GPIO


General purpose input-output (GPIO) connector

Radxa E25 has a 10-pin expansion header.

GPIO number Function4 Function3 Function2 Function1 Pin#
12 MCU_JTAG_TCK PCIE20_BUTTONRSTn CAN0_RX_M0 I2C1_SDA 1
114 I2S1_SDO3_M2 UART5_TX_M1 SPI1_MISO_M1 2
115 I2S1_SCLK_RX_M2 UART5_RX_M1 SPI1_CLK_M1 3
112 PDM_SDI3_M2 UART3_RX_M1 PWM13_M0 4
GDD 5
33 ACODEC_ADC_CLK CAN1_TX_M0 UART3_TX_M0 I2C3_SCL_M0 6
32 ACODEC_ADC_DATA CAN1_RX_M0 UART3_RX_M0 I2C3_SDA_M0 7
97 SDMMC2_D0_M1 PCIE30X1_PERSTn_M1 SPI1_CS0_M1 8
129 I2S1_SDO2_M2 PCIE20_PERSTn_M1 SPI1_MOSI_M1 9
11 PCIE30X1_BUTTONRSTn CAN0_TX_M0 I2C1_SCL 10

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 GPIO4_D1 (PIN26 on 4-0PIN HEADER) as an example:

GPIO4_D1 = 4*32 + 3*8 + 1 = 153
(A=0, B=1, C=2, D=3)

To set GPIO4_D1 output

cd /sys/class/gpio
echo 153 > export
cd gpio153
echo out > direction
echo 1 > value     # output high
echo 0 > value     # output low