Path to Programmable III Training Blog #04: Build a simple User API for Petalinux and Need Support for GPIO UIO API under Petalinux/challenges-projects/design-challenges/pathprogrammable3/b/blog/posts/path-to-programmable-iii-training-blog-04-build-a-simple-user-api-for-petalinux-and-need-support-for-gpio-uio-api-under-petalinuxTable of Contents Objectives Background Knowledge about Petalinux Drivers Build Simple User APIs for Petalinux Project Conclusions Objectives I continued to use Lab 7 Vivado project to build a couple of simple user APIs under Petalinux e.en-USTelligent Community 12RE: Path to Programmable III Training Blog #04: Build a simple User API for Petalinux and Need Support for GPIO UIO API under Petalinuxhttps://community.element14.com/challenges-projects/design-challenges/pathprogrammable3/b/blog/posts/path-to-programmable-iii-training-blog-04-build-a-simple-user-api-for-petalinux-and-need-support-for-gpio-uio-api-under-petalinuxThu, 27 Jul 2023 18:19:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f9b44f88-a687-4961-b05a-d2e85fe51f10flyingbean0<p>For customized GPIO PL module, such as PWM_LED IP from Avnet MiniZed training class, /sys/class/gpio folder after Petalinux booting-up, PWM_LED gpio is not readable there. UIO driver for PWM_LED IP might not be mounted without more dedicated work. Petalinux devmem command should be able to access PWM_LED peripheral if Vivado HW project/address is right. I will upload the trouble-shooting blog of the issues soon.</p><img src="https://community.element14.com/aggbug?PostID=26546&AppID=395&AppType=Weblog&ContentType=0" width="1" height="1">RE: Path to Programmable III Training Blog #04: Build a simple User API for Petalinux and Need Support for GPIO UIO API under Petalinuxhttps://community.element14.com/challenges-projects/design-challenges/pathprogrammable3/b/blog/posts/path-to-programmable-iii-training-blog-04-build-a-simple-user-api-for-petalinux-and-need-support-for-gpio-uio-api-under-petalinuxMon, 24 Jul 2023 11:10:05 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f9b44f88-a687-4961-b05a-d2e85fe51f10javagoza0<p><a class="ui-contentpeek internal-link view-user-profile" href="/members/flyingbean" data-contentid="3ef89aae0f504cb48f19b544a27146ef" data-contenttypeid="e9ed411860ed4f2ba0265705b8793d05">flyingbean</a>&nbsp; Hi&nbsp;I think these links will be interesting for you, I have not been able to dedicate time to review them.</p> <p><a href="https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842398/Linux+GPIO+Driver" rel="noopener noreferrer" target="_blank">Linux GPIO Driver - Xilinx Wiki - Confluence (atlassian.net)</a></p> <p><a href="https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841846/AXI+GPIO" rel="noopener noreferrer" target="_blank">AXI GPIO - Xilinx Wiki - Confluence (atlassian.net)</a></p><img src="https://community.element14.com/aggbug?PostID=26546&AppID=395&AppType=Weblog&ContentType=0" width="1" height="1">