Recently I want to write a simple user app based on the gpio driver on uclinux running on the bf548-ezkit,and I am new to uclinux ,I just do not know where can I find the specified gpio headers or the path files for the arch I need to include .
And I made a try on follow functions in the uclinux-dist :
And I export the compile error text as below :
/home/trk/blackfin-uclinux/blackfin-linux-dist/user/ledtest/ledtest.c:21: undefined reference to `_gpio_direction_output'
Can anybody help me or give me some examples using the GPIO API?
Message was edited by: Tricky