Difference between revisions of "Rock3/hardware/radxa-e25-gpio"

Latest revision as of 06:12, 27 January 2022

    ROCK 3 >  Hardware >  Radxa E25 GPIO

Radxa E25 has a 10-pin expansion header.

Pin#	Function1	Function2	Function3	Function4	GPIO Number
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

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 40-PIN 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

@@ Line 16: / Line 16: @@
 ! Function3
 ! Function4
-! Gpionumber
+! GPIO Number
 |-
 | style="background-color:#008000; color:#FFF;" | 1
@@ Line 47: / Line 47: @@
 |-
 | style="background-color:#000; color:#FFF" | 5
-| GDD
+| GND
 |
 |
@@ Line 112: / Line 112: @@
   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:
+For Rockchip 4.19 kernel, the GPIO number can be calculated as below, take GPIO4_D1 (PIN26 on 40-PIN HEADER) as an example:
   GPIO4_D1 = 4*32 + 3*8 + 1 = 153