Difference between revisions of "VAR-SOM-SD600 gpio"

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<a href="[http://mondi.web.cs.unibo.it/gpio_control.html http://mondi.web.cs.unibo.it/gpio_control.html]">[http://mondi.web.cs.unibo.it/gpio_control.html http://mondi.web.cs.unibo.it/gpio_control.html]&lt;/a&gt;
 
<a href="[http://mondi.web.cs.unibo.it/gpio_control.html http://mondi.web.cs.unibo.it/gpio_control.html]">[http://mondi.web.cs.unibo.it/gpio_control.html http://mondi.web.cs.unibo.it/gpio_control.html]&lt;/a&gt;
  
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= PinMux configuration =
 
= PinMux configuration =
  
 
GPIO mux configuration is done in kernel\arch\arm\mach-msm\board-8064-gpiomux.c At apq8064_init_gpiomux(void) you can find several examples of pinmux configuration. or example struct apq8064_gsbi2_UART2_configs configures GPIO pins 22,23,24 and 25 to serial port.
 
GPIO mux configuration is done in kernel\arch\arm\mach-msm\board-8064-gpiomux.c At apq8064_init_gpiomux(void) you can find several examples of pinmux configuration. or example struct apq8064_gsbi2_UART2_configs configures GPIO pins 22,23,24 and 25 to serial port.
  
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= Generic serial bus interface (GSBI)=
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The APQ8064 implements twelve Generic Serial Bus Interface (GSBI) ports. GSBI ports&nbsp;:an be configured for:
  
Generic serial bus interface (GSBI)
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*UART_DM
The APQ8064 implements twelve Generic Serial Bus Interface (GSBI) ports. GSBI ports :an be configured for:
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*I2C
* UART_DM
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*SPI
* I2C
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*General-purpose I/O (GPIO) bits
* SPI
 
* General-purpose I/O (GPIO) bits
 
  
 
Please refer to datasheet section: "Table ‎4_2 Detailed serial interface pinout" for elaborated list.
 
Please refer to datasheet section: "Table ‎4_2 Detailed serial interface pinout" for elaborated list.
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Revision as of 15:20, 4 May 2014

1 GPIOs features

The APQ8064 SoC GPIOs features are as follows
  • 90 GPIO pins (GPIO_0 to GPIO_89)
  • Configurable pull-up/down
  • Configurable output drive current
  • Interruptable GPIOs





2 GPIO manipulation

GPIO manipulation is done through the standard gpiolib
The usage / API is well described in kernel/Documentation/gpio.txt.

Additional useful links: <a href="http://elinux.org/GPIO">http://elinux.org/GPIO</a>

<a href="https://developer.ridgerun.com/wiki/index.php/Gpio-int-test.c">https://developer.ridgerun.com/wiki/index.php/Gpio-int-test.c</a>

<a href="https://developer.ridgerun.com/wiki/index.php/How_to_use_GPIO_signals">https://developer.ridgerun.com/wiki/index.php/How_to_use_GPIO_signals</a>

<a href="http://mondi.web.cs.unibo.it/gpio_control.html">http://mondi.web.cs.unibo.it/gpio_control.html</a>






3 PinMux configuration

GPIO mux configuration is done in kernel\arch\arm\mach-msm\board-8064-gpiomux.c At apq8064_init_gpiomux(void) you can find several examples of pinmux configuration. or example struct apq8064_gsbi2_UART2_configs configures GPIO pins 22,23,24 and 25 to serial port.


4 Generic serial bus interface (GSBI)

The APQ8064 implements twelve Generic Serial Bus Interface (GSBI) ports. GSBI ports :an be configured for:

  • UART_DM
  • I2C
  • SPI
  • General-purpose I/O (GPIO) bits

Please refer to datasheet section: "Table ‎4_2 Detailed serial interface pinout" for elaborated list.