Hello,
I'm able to export and set GPIOs but with GPIO 133 I am measuring no voltage when settings it high.
Any idea what could cause this?
Thanks in advance!
GPIO 133 not able to set
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Which platform are you talking about? The GPIO numbers are different on all boards.
Your F&S Support Team
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Srry forgot to mention that.
It's a PICOCOM A5 with embedded Linux.I used this reference pinout (pin 58 GPIO 133):
https://fs-net.de/assets/downl…PIO-ReferenceCard_eng.pdf -
You have to disable LCD to have this GPIO available. In the Linux kernel sources, call make menuconfig and go to "System Type" -> "Freescale MXC Implementations" -> "Support F&S PicoCOMA5". There disable "Use LCD interface". Save the config and recompile the kernel. Now pin 58/gpio133 should be available as GPIO.
Your F&S Support Team
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In menuconfig the LCD is already disabled, but not in "System Type" -> "Freescale MXC Implementations" -> "Support F&S PicoCOMA5" like you described. In that menu, no LCD option is available.
But I'm able to control the other "LCD-pins" like pin 123,124 (LCD_G5, LCD_G6) or pins for LCD_HSYNC, LCD_VSYNC.
Any other suggestions? Thanks -
Option "System Type" -> "Freescale MXC Implementations" -> "Support F&S PicoCOMA5" is only visible, if CONFIG_FB_MVF_DCU is active. If you already disabled the LCD driver in section "Device Drivers", then you do not see the LCD entry in the PicoCOMA5 section anymore. But then also the GPIO should be available.
Please note that on the starterkit on the display connector, pin 12 (B0) and pin 15 (B5) as well as pin 3 (R0) and pin 34 (R5) are connected, i.e. for signal mode RGB565, R0 is built from R5 and B0 is built from B5. So if you have a signal connected there (on B0), this will have direct influence on B5 (GPIO133).
Your F&S Support Team
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Srry forgot to mention that.It's a PICOCOM A5 with embedded Linux.
