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

From Variscite Wiki
Line 1: Line 1:
GPIOs features
+
= GPIOs features =
 
<div>The APQ8064 SoC GPIOs features are as follows</div>
 
<div>The APQ8064 SoC GPIOs features are as follows</div>
 
*90 GPIO pins (GPIO_0 to GPIO_89)
 
*90 GPIO pins (GPIO_0 to GPIO_89)
Line 7: Line 7:
 
<div><br/></div>
 
<div><br/></div>
 
= GPIO manipulation =
 
= GPIO manipulation =
<div><div>GPIO manipulation is done through the standard gpiolib<br/>The usage / API is well described in kernel/Documentation/gpio.txt.</div><div><br/></div><div>Additional useful links:</div><div>
+
<div><div>GPIO manipulation is done through the standard gpiolib<br/>The usage / API is well described in kernel/Documentation/gpio.txt.<br/></div><div><br/><br/></div><div>Additional useful links:</div><div>
 
[http://elinux.org/GPIO http://elinux.org/GPIO]
 
[http://elinux.org/GPIO http://elinux.org/GPIO]
  
Line 20: Line 20:
 
= PinMux configuration<br/> =
 
= PinMux configuration<br/> =
  
<br/><span style="font-size: 12px;">GPIO mux configuration is done in kernel\arch\arm\mach-msm\board-8064-gpiomux.c</span>
+
<br/><span style="font-size: 12px;">GPIO mux configuration is done in kernel\arch\arm\mach-msm\board-8064-gpiomux.c</span> <br/>
  
 
At apq8064_init_gpiomux(void) you can find several examples of pinmux configuration
 
At apq8064_init_gpiomux(void) you can find several examples of pinmux configuration
  
 
&nbsp;for example struct apq8064_gsbi2_UART2_configs configures GPIO pins 22,23,24 and 25 to serial port.
 
&nbsp;for example struct apq8064_gsbi2_UART2_configs configures GPIO pins 22,23,24 and 25 to serial port.
<pre /><div><br/><br/></div></div></div><br/><br/><br/><br/><br/><br/><br/>
+
<pre /><div><br/><br/><br/></div></div></div>
<br/><br/> <br/>
 
<br/><br/>
 
<br/><br/> <br/> <br/><br/><br/><br/> <br/><br/><br/><br/><br/><br/>
 
<br/><br/><br/><br/><br/><br/><br/>
 
<br/><br/> <br/>
 
<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
 
 
 
<br/><br/>
 

Revision as of 11:46, 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:

http://elinux.org/GPIO

https://developer.ridgerun.com/wiki/index.php/Gpio-int-test.c

https://developer.ridgerun.com/wiki/index.php/How_to_use_GPIO_signals

http://mondi.web.cs.unibo.it/gpio_control.html


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

 for example struct apq8064_gsbi2_UART2_configs configures GPIO pins 22,23,24 and 25 to serial port.