RockpiN10/hardware/gpio - Revision history

Stephen: /* General purpose input-output (GPIO) connector */

2020-12-20T12:28:04Z

‎General purpose input-output (GPIO) connector

Stephen: Created page with "{{rockpiN10_header}} {{Languages|rockpiN10/hardware/gpio}} ROCK Pi N10 > Hardware > GPIO ===
2019-12-31T11:47:09Z

Created page with "{{rockpiN10_header}} {{Languages|rockpiN10/hardware/gpio}} ROCK Pi N10 > Hardware > GPIO === <span..."

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{{Languages|rockpiN10/hardware/gpio}}

[[rockpiN10 | ROCK Pi N10]] > [[rockpiN10/hardware | Hardware]] > [[rockpiN10/hardware/gpio | GPIO]]

=== <span id="gpio">General purpose input-output (GPIO) connector</span> ===

ROCK Pi N10 has a 40-pin expansion header. Each pin is distinguished by color.

{| class="wikitable"
! GPIO number || Function3 || Function2 || Function1 || Pin# || || Pin# || Function1 || Function2 || Function3 || GPIO number
|-
| || || || +3.3V || style="background:yellow"| 1 || ||style="background:red"| 2 || +5.0V || || ||
|-
| 71 || || I2C7_SDA || GPIO2_A7 || style="background:green; color:white"| 3 || || style="background:red"| 4 || +5.0V || || ||
|-
| 72 || || I2C7_SCL || GPIO2_B0 || style="background:green; color:white"| 5 || || style="background:black; color:white"| 6 || GND || || ||
|-
| 13 || || || GPIO0_B5 || style="background:green; color:white"| 7 || || style="background:green; color:white"| 8 || GPIO4_C4 || style="background:orange"|UART2_TXD || || 148
|-
| || || || GND || style="background:black; color:white"| 9 || || style="background:green; color:white"|10 || GPIO4_C3 || style="background:orange"|UART2_RXD || || 147
|-
|146 || || PWM0 || GPIO4_C2 || style="background:green; color:white"|11 || || style="background:green; color:white"|12 || GPIO0_B1 || || || 9
|-
| 150 || || PWM1 || GPIO4_C6 || style="background:green; color:white"|13 || || style="background:black; color:white"|14 || GND || || ||
|-
| 149 || || SPDIF_TX || GPIO4_C5 || style="background:green; color:white"|15 || || style="background:green; color:white"|16 || GPIO0_B0 || || || 8
|-
| || || || +3.3V || style="background:yellow"|17 || || style="background:green; color:white"|18 || GPIO2_A6 || || || 70
|-
|40 || UART4_TXD || SPI1_TXD || GPIO1_B0 || style="background:green; color:white"|19 || ||style="background:black; color:white"|20 || GND || || ||
|-
|39 || UART4_RXD || SPI1_RXD || GPIO1_A7 || style="background:green; color:white"|21 || || style="background:green; color:white"|22 || GPIO3_D4 || || || 124
|-
|41 || || SPI1_CLK || GPIO1_B1 || style="background:green; color:white"|23 || || style="background:green; color:white"|24 || GPIO1_B2 || SPI1_CSN0 || || 42
|-
| || || || GND || style="background:black; color:white"|25 || || style="background:green; color:white"|26 || ADC_IN1 || || ||
|-
| 64 || || I2C2_SDA || GPIO2_A0 || style="background:blue; color:white"|27 || || style="background:blue; color:white"|28 || GPIO2_A1 || I2C2_CLK || || 65
|-
| 74 || || I2C6_SCL || GPIO2_B2 || style="background:green; color:white"|29 || || style="background:black; color:white"|30 || GND || || ||
|-
| 73 || || I2C6_SDA || GPIO2_B1 || style="background:green; color:white"|31 || || style="background:green; color:white"|32 || GPIO3_D5 || || || 125
|-
| 157 || || || GPIO4_D5 || style="background:green; color:white"|33 || || style="background:black; color:white"|34 || GND || || ||
|-
| 68 || || || GPIO2_A4 || style="background:green; color:white"|35 || || style="background:green; color:white"|36 || GPIO2_A2 || || || 66
|-
| 126 || || || GPIO3_D6 || style="background:green; color:white"|37 || || style="background:green; color:white"|38 || GPIO2_A3 || || || 67
|-
| || || || GND || style="background:black; color:white"|39 || ||style="background:green; color:white"|40 || GPIO1_A2 || || || 34
|}

=== IO Voltage ===
RK3399PRO have three IO voltages, 1.8V/3.0V/3.3V. For ROCK Pi N10, below is the default voltage:

<pre>
| GPIO | Voltage Level | Tolerance |
| ---------- | ------------- | --------- |
| GPIO3_C0 | 3.3V | 3.465V |
| ADC_IN0 | 1.8V | 1.98V |
| Other GPIO | 3.0V | 3.14V |
</pre>

=== GPIO number ===
Rockchip RK3399PRO 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 4.4 kernel, the GPIO number can be calculated as below, take GPIO4_D5 (PIN22 on 40PIN GPIO) as an example:

GPIO4_D5 = 432 + 38 + 5 = 157
(A=0, B=1, C=2, D=3)

To set GPIO4_D5 output

cd /sys/class/gpio
echo 157 > export
cd gpio157
echo out > direction
echo 1 > value # output high
echo 0 > value # output low