GPIOlib - Revision history

FabienM: /* Datasheet GPIO number correspondance */

2019-04-29T08:46:27Z

‎Datasheet GPIO number correspondance

2017-11-23T18:08:29Z

‎Get APFxxDev i.MX switch status

2017-06-21T14:48:41Z

‎Get APFxxDev i.MX switch status

2017-06-21T14:38:33Z

‎Get APFxxDev i.MX switch status

2017-06-21T14:25:11Z

‎Get APFxxDev i.MX switch status

2017-06-21T14:24:41Z

‎Get APFxxDev i.MX switch status

2017-06-21T14:24:08Z

‎Get APFxxDev i.MX switch status

2017-03-14T17:48:05Z

‎Installation

2017-03-14T17:44:33Z

‎Blink APFxxDev i.MX LED

2016-11-01T22:13:52Z

‎Datasheet gpio number correspondance

@@ Line 17: / Line 17: @@
 * [[APF28]]: (Bank number x 32) + pin number
 ** Example : '''GPIO_0_21''' = (0x32) + 21 = '''21'''
-* [[APF51]], [[APF6]] and [[OPOS6UL]]: ((Bank number - 1) x 32) + pin number
+* [[APF51]], [[APF6]], [[OPOS6UL]] and [[OPOS6UL_SP]]: ((Bank number - 1) x 32) + pin number
 ** Example : '''GPIO1_2''' = (0 x 32) + 2 = '''2'''

@@ Line 95: / Line 95: @@
 ** for APF27Dev: '''PF13 ->''' PortF (n°6) pin 13 -> (6-1)*32 + 13 -> '''GPIO n°173'''
 ** for APF51Dev/APF6Dev: '''GPIO1_3''' -> Port 1 pin 3 -> '''GPIO n°3''' ((1-1)*32 + 3)
 ** for APF28Dev: Bank 0, pin 17 -> GPIO n° 17 (0*32 + 17)
 ** for OPOS6ULDev: GPIO2_11 -> GPIO n° 43
@@ Line 102: / Line 103: @@
 or
 # export SWITCH=3      (APF51Dev)
 or
 # export SWITCH=17     (APF28Dev)

@@ Line 96: / Line 96: @@
 ** for APF51Dev/APF6Dev: '''GPIO1_3''' -> Port 1 pin 3 -> '''GPIO n°3''' ((1-1)*32 + 3)
 ** for APF28Dev: Bank 0, pin 17 -> GPIO n° 17 (0*32 + 17)
-** for OPOS6ULDev: ? -> GPIO n° 43
+** for OPOS6ULDev: GPIO2_11 -> GPIO n° 43
 * Define envt variable (for portability):
 <pre class="apf">

@@ Line 96: / Line 96: @@
 ** for APF51Dev/APF6Dev: '''GPIO1_3''' -> Port 1 pin 3 -> '''GPIO n°3''' ((1-1)*32 + 3)
 ** for APF28Dev: Bank 0, pin 17 -> GPIO n° 17 (0*32 + 17)
-** for OPOS6ULDev: GPIO2_1 -> GPIO n° 33 ((2-1)*32 + 1)
+** for OPOS6ULDev: ? -> GPIO n° 43
 * Define envt variable (for portability):
 <pre class="apf">

@@ Line 104: / Line 104: @@
 or
 # export SWITCH=17     (APF28Dev)
 </pre>
 * Ask kernel to export the GPIO:

@@ Line 25: / Line 25: @@
 $ make linux-menuconfig
 </pre>
-* Enable the sysfs interface of the GPIOlib If not already done:
+* If not already done, enable the sysfs interface of the GPIOlib:
 <pre class="config">
 Device Drivers  --->
@@ Line 43: / Line 43: @@
           < >   LED Support for GPIO connected LEDs
   </pre>
-* Save your new configuration and rebuild your kernel (if needed)
+* On Linux version supporting device tree (ex [[OPOS6UL]]), this configuration has to be done in your devt board ''.dts'' description file and not by selecting drivers (ex ''bsp/buildroot/output/build/linux-4.8.10/arch/arm/boot/dts/imx6ul-opos6uldev.dts'').
 <pre class="host">
 $ make
 </pre>
-* and reflash your kernel (if needed)
+* and reflash your kernel image (if needed) or your .dtb
 ==Usage==

@@ Line 55: / Line 55: @@
 ** for APF51Dev/APF6Dev: GPIO1_2 -> Port 1 pin 2 -> GPIO n° 2
 ** for APF28Dev: Bank 0, pin 21 -> GPIO n° 21 (0*32 + 21)
 * Define envt variable (for portability):
 <pre class="apf">
 # export LED=174    (APF27Dev)
 or
-# export LED=2    (APF51Dev)
+# export LED=2      (APF51Dev/APF6Dev)
 or
-# export LED=21    (APF28Dev)
+# export LED=21     (APF28Dev)
 </pre>
 * Ask kernel to export the GPIO:

@@ Line 8: / Line 8: @@
 Linux provides specific drivers for [[GPIO_LEDS|LEDs]] and [[GPIO_keys|switches]] - as explained in the [http://www.kernel.org/doc/Documentation/gpio.txt Linux documentation of the  GPIO] - "that should be used instead of talking directly to the GPIOs; they integrate with kernel frameworks better than your userspace code could."
-== Datasheet gpio number correspondance ==
+== Datasheet GPIO number correspondance ==
-Linux manage gpio with a simple number, but under datasheet GPIO are referenced with port number (or letter) and pin number. To convert in single integer, use following formula :
+Linux manages GPIO with a simple number, but under datasheet GPIO are referenced with port number (or letter) and pin number. To convert in single integer, use following formula :
-* '''APF9328''': TODO.
+* [[APF9328]]: TODO.
-* '''APF27''': (port letter (A=0, B=1, ...) x 32 ) + pin number.
+* [[APF27]]: (port letter (A=0, B=1, ...) x 32 ) + pin number.
 ** Example : '''PF14''' = (5x32) + 14 = '''174'''
-* '''APF28''': (Bank number x 32) + pin number
+* [[APF28]]: (Bank number x 32) + pin number
 ** Example : '''GPIO_0_21''' = (0x32) + 21 = '''21'''
-* '''APF51''' and '''APF6''': ((Bank number - 1) x 32) + pin number
+* [[APF51]], [[APF6]] and [[OPOS6UL]]: ((Bank number - 1) x 32) + pin number
 ** Example : '''GPIO1_2''' = (0 x 32) + 2 = '''2'''