Is There Anyone Can Use UART In Android Directly?
(Not Using FT232 , PT2303 , ...)
Yes, use this.
https://code.google.com/p/android-serialport-api/
Quote from: dave-at-axon on April 09, 2014, 01:03:22 PM
Yes, use this.
https://code.google.com/p/android-serialport-api/
Thanks, Great code but is there any codes that not use NDK?
I was thinking we can add a lib to kernel and a lib to SDK and control UART in a simple command in Eclipse.
Is that necessary to disable serial debug to use UART-1?
There is no native support for serial ports under Android. Even if you have a kernel driver and by the way, the existing UART driver is in the kernel, you will still need a JNI and the NDK to access it.
It is very easy to setup the NDK under Eclipse. I even have it under Android Studio with a couple script files to create the final builds and move the files so that AS sees them.
Your lib idea still need to would be a JNI too, as is the SerialPort API I linked to. Use it as it works great. I have an Android system talking to a fingerprint reader on a UART and it is rock solid.
Thanks, Can you explain how to set NDK for Android Studio? And is that necessary disable serial debug to use UART 1?
For NDK see here.
https://developer.android.com/tools/sdk/ndk/index.html
As for the UART, I don't know much about the A13, sorry.
Excuse me, is there codes for using PWM,ADC,GPIO ?
Not seen anything for PWM yet but GPIO and I2C are fully working under Android.
I wrote an I2C driver for another Android platform but it is very easily ported to the A20/A13 etc
http://sourceforge.net/projects/mini6410-i2c/
GPIO is easy too. Same principle. Do a search for Android GPIO on Google as there is a load of stuff on this.
As for ADC, I use an external ADC over I2C (MCP3428) as it's easier than writing a driver for the internal ADC.
I don't know how to thank you for these. I will have more question inside the codes. ;D