15 Mar
2016
15 Mar
'16
1:53 p.m.
On Tue, Mar 15, 2016 at 2:48 AM, Peng Fan van.freenix@gmail.com wrote:
When configured a gpio to output direction, directly reading PSR register can not return the output value, since we did not set SION bit for gpio iomux. So, we can use data register to reflect what value is outputed.
Then why not simply set the SION bit instead?