How to use GPIO for RK3399 RSB4710 - Revision history

Wei.zeng at 02:19, 13 September 2022

2022-09-13T02:19:26Z

Yunjin.jiang at 02:11, 14 April 2021

2021-04-14T02:11:33Z

Jinmin.xu at 02:04, 30 September 2020

2020-09-30T02:04:15Z

Yunjin.jiang at 02:27, 4 August 2020

2020-08-04T02:27:54Z

Yunjin.jiang at 01:00, 7 May 2020

2020-05-07T01:00:29Z

Yunjin.jiang at 00:48, 7 May 2020

2020-05-07T00:48:46Z

Yunjin.jiang at 06:16, 14 February 2020

2020-02-14T06:16:52Z

Yunjin.jiang at 06:15, 14 February 2020

2020-02-14T06:15:20Z

Yunjin.jiang: Created page with "= Introduction = GPIO, 全称 General-Purpose Input/Output（通用输入输出），是一种软件运行期间能够动态配置和控制的通用引脚。 RK3399有5组GP..."

2020-02-14T06:14:32Z

Created page with "= Introduction = GPIO, 全称 General-Purpose Input/Output（通用输入输出），是一种软件运行期间能够动态配置和控制的通用引脚。 RK3399有5组GP..."

New page

= Introduction =

GPIO, 全称 General-Purpose Input/Output（通用输入输出），是一种软件运行期间能够动态配置和控制的通用引脚。

RK3399有5组GPIO bank：GPIO0~GPIO4，每组又以 A0~A7, B0~B7, C0~C7, D0~D7 作为编号区分（不是所有 bank 都有全部编号，例如 GPIO4 就只有 C0~C7, D0~D2)。

所有的GPIO在上电后的初始状态都是输入模式，可以通过软件设为上拉或下拉，也可以设置为中断脚，驱动强度都是可编程的。

每个 GPIO 口除了通用输入输出功能外，还可能有其它复用功能，

例如 GPIO2_A2，可以利用成以下功能：

*
GPIO2_A2

*
CIF_D2

= Configuration =

The RK3399 bank/bit notation for GPIOs must be formed as "GPIO<GPIO_bank>_<gpio_bit>" 

The numeric value of GPIO is calculated as follows:
<pre>32 x (gpio_bank) + gpio_bit
</pre>

gpio_bit : A0～A7 0-7 B0～B7 8-15 C0～C7 16-23 D0～D7 24-31

E.g. GPIO2_A4 becomes 68

RSB-4710

{| cellspacing="1" cellpadding="1" border="1"
|-
| GPIO Number
| GPIO formed
| Numeric Representation
|-
| GPIO0
| GPIO7_A3 
| 219 
|-
| GPIO1 
| GPIO7_A4 
| 220 
|-
| GPIO2 
| GPIO7_A5 
| 221 
|-
| GPIO3 
| GPIO7_C5 
| 237 
|-
| GPIO4 
| GPIO8_A2 
| 250 
|-
| GPIO5 
| GPIO8_A3 
| 251 
|-
| GPIO6 
| GPIO8_A0 
| 248 
|-
| GPIO7 
| GPIO8_A1 
| 249
|}

= Test =

Export GPIO then you can use control GPIO from userr space through sysfs

Export GPIO0
<pre># echo 219 > /sys/class/gpio/export
</pre>

Set GPIO direction to in/out
<pre># echo "out" > /sys/class/gpio/gpio219/direction
</pre>

Set GPIO value 0/1 if GPIO pin define is output
<pre># echo 1 > /sys/class/gpio/gpio219/value
</pre>

Used as IRQ signal

Note:You have to configure GPIO to input
<pre># echo "rising" > /sys/class/gpio/gpio219/edge
</pre>

*rising: Trigger on rising edge
*falling: Trigger on falling edge
*both: Trigger on both edges
*none: Disable interrupt on both edges

Unexport GPIO0
<pre># echo 219 > /sys/class/gpio/unexport
</pre>

==== Test ====

GPIO 219 and GPIO 220 are taken as an example:

*Connect GPIO 219 and GPIO 220
*Export GPIO 219 and GPIO 220
<pre># echo 219 > /sys/class/gpio/export
# echo 220 > /sys/class/gpio/export
</pre>

*Set GPIO 219 to output
<pre># echo "out" > /sys/class/gpio/gpio219/direction
</pre>

*Set GPIO 220 to input
<pre># echo "in" > /sys/class/gpio/gpio220/direction
</pre>

*Change GPIO 219 to 1 and read GPIO 220 value
<pre># echo 1 > /sys/class/gpio/gpio219/value
# cat /sys/class/gpio/gpio220/value 1
</pre>

*Change GPIO 219 to 0 and read GPIO 220 value
<pre># echo 0 > /sys/class/gpio/gpio219/value
# cat /sys/class/gpio/gpio220/value 0</pre>

@@ Line 24: / Line 24: @@
 |-
 | GPIO2<br/>
-| GPIO1_C1<br/>
+| GPIO1_C2<br/>
 | 50<br/>
 |-

@@ Line 104: / Line 104: @@
 | style="width: 158px;" | <div>149</div>
 |}
 = Test =
-Here we take GPIO1 of 4710 as an example.5780 is similar&nbsp;set up.
+Here we take GPIO1 of 4710 as an example.3710 and 5780 are&nbsp;similar to set up.
 Export GPIO then you can use control GPIO from userr space through sysfs

@@ Line 11: / Line 11: @@
 E.g. GPIO2_B0&nbsp;becomes 72
-RSB-4710
+== RSB-4710 ==
 {| cellspacing="1" cellpadding="1" border="1"
@@ Line 27: / Line 27: @@
 | 50<br/>
 |-
-| <s>GPIO3<br/></s>
+| <s>GPIO3</s><br/>
-| <s>GPIO4_A3<br/></s>
+| <s>GPIO4_A3</s><br/>
 | <s>131</s>
 |-
@@ Line 46: / Line 46: @@
 <span style="color:#FF0000;">'''Note：'''</span>
-<span style="color:#FF0000;"></span>GPIO3 is used to mute speak in later version.
+GPIO3 is used to mute speak in later version.
 = Test =
 Export GPIO then you can use control GPIO from userr space through sysfs

@@ Line 27: / Line 27: @@
 | 50<br/>
 |-
-| GPIO3<br/>
+| <s>GPIO3<br/></s>
-| GPIO4_A3<br/>
+| <s>GPIO4_A3<br/></s>
-| 131
+| <s>131</s>
 |-
 | GPIO4<br/>
@@ Line 43: / Line 43: @@
 | 8
 |}
 = Test =

@@ Line 9: / Line 9: @@
 gpio_bit&nbsp;: A0～A7 0-7 B0～B7 8-15 C0～C7 16-23 D0～D7 24-31
-E.g. GPIO2_A4 becomes 68
+E.g. GPIO2_B0&nbsp;becomes 72
 RSB-4710
@@ Line 18: / Line 18: @@
 | GPIO formed
 | Numeric Representation
 |-
 | GPIO1<br/>
-| GPIO7_A4<br/>
+| GPIO2_B0<br/>
-| 220<br/>
+| 72
 |-
 | GPIO2<br/>
-| GPIO7_A5<br/>
+| GPIO1_C1<br/>
-| 221<br/>
+| 50<br/>
 |-
 | GPIO3<br/>
-| GPIO7_C5<br/>
+| GPIO4_A3<br/>
-| 237<br/>
+| 131
 |-
 | GPIO4<br/>
-| GPIO8_A2<br/>
+| GPIO3_D4<br/>
-| 250<br/>
+| 124
 |-
 | GPIO5<br/>
-| GPIO8_A3<br/>
+| GPIO4_A4<br/>
-| 251<br/>
+| 132
 |-
 | GPIO6<br/>
-| GPIO8_A0<br/>
+| GPIO0_B0<br/>
-| 248<br/>
+| 8
 |}

@@ Line 48: / Line 48: @@
 Export GPIO then you can use control GPIO from userr space through sysfs
-Export GPIO0
+Export GPIO1
-<pre># echo 219 > /sys/class/gpio/export
+<pre># echo 72 > /sys/class/gpio/export
 </pre>
 Set GPIO direction to in/out
-<pre># echo "out" > /sys/class/gpio/gpio219/direction
+<pre># echo "out" > /sys/class/gpio/gpio72/direction
 </pre>
 Set GPIO value 0/1 if GPIO pin define is output
-<pre>#  echo 1 > /sys/class/gpio/gpio219/value
+<pre>#  echo 1 > /sys/class/gpio/gpio72/value
 </pre>
@@ Line 63: / Line 63: @@
 Note:You have to configure GPIO to input
-<pre>#  echo "rising" > /sys/class/gpio/gpio219/edge
+<pre>#  echo "rising" > /sys/class/gpio/gpio72/edge
 </pre>
@@ Line 71: / Line 71: @@
 *none: Disable interrupt on both edges
-Unexport GPIO0
+Unexport GPIO1
-<pre># echo 219 > /sys/class/gpio/unexport
+<pre># echo 72 > /sys/class/gpio/unexport
 </pre>
 '''Test'''
-GPIO 219 and GPIO 220 are taken as an example:
+GPIO1 and GPIO2 are taken as an example:
-*Connect GPIO 219 and GPIO 220
+*Connect GPIO1 and GPIO2
-*Export GPIO 219 and GPIO 220
+*Export GPIO1 and GPIO2
-<pre># echo 219 > /sys/class/gpio/export
+<pre># echo 72 > /sys/class/gpio/export
-# echo 220 > /sys/class/gpio/export
+# echo 50 > /sys/class/gpio/export
 </pre>
-*Set GPIO 219 to output
+*Set GPIO 1 to output
-<pre># echo "out" > /sys/class/gpio/gpio219/direction
+<pre># echo "out" > /sys/class/gpio/gpio72/direction
 </pre>
-*Set GPIO 220 to input
+*Set GPIO 2 to input
-<pre># echo "in" > /sys/class/gpio/gpio220/direction
+<pre># echo "in" > /sys/class/gpio/gpio50/direction
 </pre>
-*Change GPIO 219 to 1 and read GPIO 220 value
+*Change GPIO1 to 1 and read GPIO2value
-<pre># echo 1 > /sys/class/gpio/gpio219/value
+<pre># echo 1 > /sys/class/gpio/gpio72/value
-# cat /sys/class/gpio/gpio220/value 1
+# cat /sys/class/gpio/gpio50/value
 </pre>
-*Change GPIO 219 to 0 and read GPIO 220 value
+*Change GPIO1&nbsp;to 0 and read GPIO2&nbsp;value
-<pre># echo 0 > /sys/class/gpio/gpio219/value
+<pre># echo 0 > /sys/class/gpio/gpio72/value
-# cat /sys/class/gpio/gpio220/value 0</pre>
+# cat /sys/class/gpio/gpio50/value

@@ Line 1: / Line 1: @@
 = Configuration =
@@ Line 98: / Line 83: @@
 </pre>
-==== Test ====
+'''Test'''
 GPIO 219 and GPIO 220 are taken as an example:

@@ Line 11: / Line 11: @@
 例如 GPIO2_A2，可以利用成以下功能：
 *GPIO2_A2
-GPIO2_A2
+*CIF_D2
 = Configuration =