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products:sbc:common:applications:gpio:40pin-header

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products:sbc:common:applications:gpio:40pin-header [2022/10/18 03:05]
hyphop [Boards reference table vendor kernel]
products:sbc:common:applications:gpio:40pin-header [2024/08/12 03:08] (current)
william [Troubleshooting]
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 ====== GPIO Header ====== ====== GPIO Header ======
  
-Universal GPIO 40 pins board header, used for communication between board and different external devices. +====== GPIO usage examples ======
- +
-===== Boards reference table vendor kernel ===== +
- +
-<WRAP important > +
-Current GPIO numbers valid for vendor kernel only. Mainline linux kernel GPIO numbers will be different...  +
-</WRAP> +
- +
-==== Edge2 ==== +
- +
-^ GPIO  ^ Name                    ^ Physical  ^ Physical  ^ Name                     ^ GPIO  ^ +
-|        GND(0V)                |  1        |  21        GND(0V)                       | +
-|        SARADC_IN4              2        |  22        MCU_SWDIO                     | +
-|        1.8V                    3        |  23        MCU_SWCLK                     | +
-|  112  |  SPI1_MOSI_M1/GPIO3_C0  |  4        |  24        VCC_MCU                       | +
-|  111  |  SPI1_MISO_M1/GPIO3_B7  |  5        |  25                                |       | +
-|  114  |  SPI1_CS_M1/GPIO3_C2    |  6        |  26                                |       | +
-|  113  |  SPI1_CLK_M1/GPIO3_C1    7        |  27                                |       | +
-|        I2C6_SCL_M0_3V3        |  8        |  28                                |       | +
-|        I2C6_SDA_M0_3V          9        |  29                                |       | +
-|        MCU_IR_IN              |  10        30                                |       | +
-|        PWR_KEY_IN              11        31                                |       | +
-|        SARADC_IN3              12        32                                |       | +
-|        VCC_3V3_S3              13        33                                |       | +
-|        DEBUG_TX_3V3            14        34                                |       | +
-|        DEBUG_RX_3V3            15        35                                |       | +
-|        GND(0V)                |  16        36                                |       | +
-|        PWM3_IR_M3              17        37                                |       | +
-|        GND(0V)                |  18        38                                |       | +
-|        MCU_USART2_TX          |  19        39                                |       | +
-|        MCU_USART2_RX          |  20        40                                |       | +
- +
- +
-===== Control GPIO examples =====+
  
 <WRAP important > <WRAP important >
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 When you get the GPIO number, you can follow the steps below to control it. Here we take GPIO number ''465'' as an example. When you get the GPIO number, you can follow the steps below to control it. Here we take GPIO number ''465'' as an example.
  
-==== Export GPIO ====+===== Export GPIO =====
  
 ```shell ```shell
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 ``` ```
  
-==== Set-up GPIO direction ====+===== Set-up GPIO direction =====
  
 We can configure direction as input or output. We can configure direction as input or output.
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 ```shell ```shell
 $ echo out | sudo tee /sys/class/gpio/gpio465/direction # Set GPIO output $ echo out | sudo tee /sys/class/gpio/gpio465/direction # Set GPIO output
-$ echo in | sudo tee /sys/class/gpio/gpio465/direction # Set GPIO input+$ echo in  | sudo tee /sys/class/gpio/gpio465/direction # Set GPIO input
 ``` ```
  
-==== Set GPIO value ====+===== Set GPIO value =====
  
 ```shell ```shell
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 ``` ```
  
-==== Get GPIO value ====+===== Get GPIO value =====
  
 ```shell ```shell
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 ``` ```
  
-==== Unexport GPIO ==== +===== Unexport GPIO ===== 
  
 ```shell ```shell
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 ``` ```
  
-==== Troubleshooting ====+===== Troubleshooting =====
  
 If you got the similar error below, it means that the PIN you try to export is used for another function, you need to edit [[products:sbc:common:configurations:device-tree-overlay|Device Tree Overlay]] configuration file to set the PIN as normal GPIO. If you got the similar error below, it means that the PIN you try to export is used for another function, you need to edit [[products:sbc:common:configurations:device-tree-overlay|Device Tree Overlay]] configuration file to set the PIN as normal GPIO.
  
 ```shell ```shell
-khadas@Khadas:~$ echo 465 | sudo tee /sys/class/gpio/export +$ echo 465 | sudo tee /sys/class/gpio/export 
 tee: /sys/class/gpio/export: Invalid argument tee: /sys/class/gpio/export: Invalid argument
 ``` ```
  
Last modified: 2022/10/18 03:05 by hyphop