Difference between revisions of "Rock3/CM3p/e25/GPIO"

Revision as of 06:42, 27 January 2022

     ROCK 3 >  ROCK 3 Compute Module >  Radxa E25 >  GPIO

Radxa E25 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

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

@@ Line 2: / Line 2: @@
 {{Languages|rock3/hardware/gpio}}
-    [[rock3 | ROCK 3]] > [[rock3/hardware | Hardware]] > [[Rock3/CM3p/e25/GPIO | Radxa E25 GPIO]]
+     [[rock3 | ROCK 3]] > [[rock3/CM3 | ROCK 3 Compute Module]] > [[rock3/CM3/e25 | Radxa E25]] > [[rock3/CM3/e25/GPIO | GPIO]]
@@ Line 47: / Line 48: @@
 |-
 | style="background-color:#000; color:#FFF" | 5
-| GDD
+| GND
 |
 |
@@ Line 112: / Line 113: @@
   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 GPIO3_C2 (PIN2 on 10-PIN HEADER) as an example:
-  GPIO4_D1 = 4*32 + 3*8 + 1 = 153
+  GPIO3_C2 = 3*32 + 2*8 + 2 = 114
   (A=0, B=1, C=2, D=3)
-To set GPIO4_D1 output
+To set GPIO3_C2 output
   cd /sys/class/gpio
-  echo 153 > export
+  echo 114> export
-  cd gpio153
+  cd gpio114
   echo out > direction
   echo 1 > value     # output high
   echo 0 > value     # output low