Rock4/hardware/gpio - Revision history

RadxaYuntian at 08:37, 22 February 2023

2023-02-22T08:37:46Z

Stephen at 08:28, 22 February 2023

2023-02-22T08:28:47Z

Nascs at 11:57, 26 November 2022

2022-11-26T11:57:40Z

Hipboi: Created page with "{{rock4_header}} {{Languages|rock4/hardware/gpio}} NOTOC ROCK 4 > Hardware > GPIO

2022-08-26T13:16:13Z

Created page with "{{rock4_header}} {{Languages|rock4/hardware/gpio}} NOTOC ROCK 4 > Hardware > GPIO <div class="col-md-12 "..."

New page
{{rock4_header}}
{{Languages|rock4/hardware/gpio}}

NOTOC

[[rock4 | ROCK 4]] > [[rock4/hardware | Hardware]] > [[rock4/hardware/gpio | GPIO]]

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<div class="panel-heading"><h3>GPIO</h3></div>
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=== <span id="gpio"> general purpose input-output (GPIO) connector</span> ===
ROCK 4 series has a 40-pin expansion header. Each pin is distinguished by color.
{| class="wikitable"
! GPIO number || Function2 || Function1 || GPIO || Pin# || || Pin# || GPIO || Function1 || Function2 || 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 || ||
|-
| 75 || || SPI2_CLK || GPIO2_B3 || 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 || GPIO4_A3 || I2S1_SCLK || || 131
|-
| 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 || GPIO4_D2 || || || 154
|-
| || || +3.3V || || style="background:yellow"|17 || || style="background:green; color:white"|18 || GPIO4_D4 || || || 156
|-
|40 || UART4_TXD || style="background:orange"|SPI1_TXD || GPIO1_B0 || style="background:green; color:white"|19 || ||style="background:black; color:white"|20 || || GND || ||
|-
|39 || UART4_RXD || style="background:orange"|SPI1_RXD || GPIO1_A7 || style="background:green; color:white"|21 || || style="background:green; color:white"|22 || GPIO4_D5 || || || 157
|-
|41 || || style="background:orange"|SPI1_CLK || GPIO1_B1 || style="background:green; color:white"|23 || || style="background:green; color:white"|24 || GPIO1_B2 || style="background:orange"|SPI1_CSn || || 42
|-
| || || GND || || style="background:black; color:white"|25 || || style="background:green; color:white"|26 || || ADC_IN0 || ||
|-
| 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 || SPI2_TXD || GPIO2_B2 || style="background:green; color:white"|29 || || style="background:black; color:white"|30 || || GND || ||
|-
| 73 || I2C6_SDA || SPI2_RXD || GPIO2_B1 || style="background:green; color:white"|31 || || style="background:green; color:white"|32 || GPIO3_C0 || SPDIF_TX || UART3_CTSn || 112
|-
| 76 || || SPI2_CSn || GPIO2_B4 || style="background:green; color:white"|33 || || style="background:black; color:white"|34 || || GND || ||
|-
| 133 || || I2S1_LRCK_TX || GPIO4_A5 || style="background:green; color:white"|35 || || style="background:green; color:white"|36 || GPIO4_A4 || I2S1_LRCK_RX || || 132
|-
| 158 || || || GPIO4_D6 || style="background:green; color:white"|37 || || style="background:green; color:white"|38 || GPIO4_A6 || I2S1_SDI || || 134
|-
| || || GND || || style="background:black; color:white"|39 || ||style="background:green; color:white"|40 || GPIO4_A7 || I2S1_SDO || || 135
|}

<div class="toccolours mw-collapsible mw-collapsed" style="overflow:auto;">

=== <span id="rockpi4c+gpio">'''ROCK Pi 4C Plus V1.0/V1.1''' general purpose input-output (GPIO) connector</span> ===

ROCK Pi 4C Plus has a 40-pin expansion header. Each pin is distinguished by color.
{| class="wikitable"
! GPIO number || Function2 || Function1 || GPIO || Pin# || || Pin# || GPIO || Function1 || Function2 || 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 || ||
|-
| 75 || || SPI2_CLK || GPIO2_B3 || 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 || GPIO2_D3 || || || 91
|-
| 33 || || || GPIO1_A1 || 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 || GPIO4_D2 || || || 154
|-
| || || +3.3V || || style="background:yellow"|17 || || style="background:green; color:white"|18 || GPIO4_D4 || || || 156
|-
|40 || UART4_TXD || style="background:orange"|SPI1_TXD || GPIO1_B0 || style="background:green; color:white"|19 || ||style="background:black; color:white"|20 || || GND || ||
|-
|39 || UART4_RXD || style="background:orange"|SPI1_RXD || GPIO1_A7 || style="background:green; color:white"|21 || || style="background:green; color:white"|22 || GPIO4_D5 || || || 157
|-
|41 || || style="background:orange"|SPI1_CLK || GPIO1_B1 || style="background:green; color:white"|23 || || style="background:green; color:white"|24 || GPIO1_B2 || style="background:orange"|SPI1_CSn || || 42
|-
| || || GND || || style="background:black; color:white"|25 || || style="background:green; color:white"|26 || || ADC_IN0 || ||
|-
| 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 || SPI2_TXD || GPIO2_B2 || style="background:green; color:white"|29 || || style="background:black; color:white"|30 || || GND || ||
|-
| 73 || I2C6_SDA || SPI2_RXD || GPIO2_B1 || style="background:green; color:white"|31 || || style="background:green; color:white"|32 || GPIO3_C0 || SPDIF_TX || UART3_CTSn || 112
|-
| 76 || || SPI2_CSn || GPIO2_B4 || style="background:green; color:white"|33 || || style="background:black; color:white"|34 || || GND || ||
|-
| 133 || || I2S1_LRCK_TX || GPIO4_A5 || style="background:green; color:white"|35 || || style="background:green; color:white"|36 || GPIO2_D4 || || || 92
|-
| 158 || || || GPIO4_D6 || style="background:green; color:white"|37 || || style="background:green; color:white"|38 || GPIO1_A4 || || || 36
|-
| || || GND || || style="background:black; color:white"|39 || ||style="background:green; color:white"|40 || GPIO1_C4 || || || 52
|}

</div>

==== Notes about 40-pin Header ====
* Function marked with color orange is the default function of this pin.
* Except Pins for power supply, all pins are routed directly to SoC RK3399.
* For pin 3, 5, 27, 28, 29 and 31, each pin is connected to the 3.0V supply through a 4.7K pull-up resistor.
* Pin 7 is routed directly to the pin of MIPI CSI on board.
* SPI
** Pin 19, 21, 23, 24 also route to the pins of SPI flash on board. If the ROCK 4 model has [[Rockpi4/hardware/spi_flash | SPI flash soldered on board]], the SPI function is not available on GPIO header.
* UART
UART2 is enabled as U-boot and Linux serial console by default. Check [[Rockpi4/dev/serial-console]] to use. Check [[Rockpi4/hardware/devtree_overlays]] to disable serial console on UART2.
UART2 & UART4 support a wide range of baud rate. It includes but not is not limited to the following baud rates. For instance, 115200bps. 500000bps, 1500000bps and so on.
** For v1.4 and later hardware, on board SPI flash is soldered, UART4 PINs are used as SPI function.
* For I2C-2 and I2C-7
** We have do the test using the i2c device e2prom. We need to open the i2c device file, and then do the read or write operation.

=== IO Voltage ===
RK3399 have three IO voltages, 1.8V/3.0V/3.3V. For ROCK Pi 4, 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 RK3399 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)

[[File:Gpio_number.png]]

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

=== GPIO Libraries/API ===
====Install [[Rockpi4/dev/libmraa | Libmraa]] ====

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