Running More than one Background Device Drivers in Embedded Linux

Can you provide more context on the system itself? What ADI component are you interfacing with? What are the update rates of the two scripts you have?

-Travis

The board we are using is a custom board having Zynq-7030 chip and AD9361 transceiver on it. We are using UART in our design to communicate between PL to PS and vice versa. To control the PS-PL communication, we have to execute that audio drivers (audio.exe). These audio drivers read and write data on uart interface. The execution of these drivers alone is not causing any kind of problem and the results are according to our expectations. 

Currently, we are aiming to use an AXI-GPIO in our design. We are controlling the gpio in PS by writing its value to either 1 or 0. The purpose of script.sh is to monitor the RSSI value continuously (through a while loop) and then according to that, writing 1/0 value to the gpio. 

Writing 1/0 to the gpio by ourselves is not causing any problem. Also, displaying RSSI value (cat in_volt0_rssi) is also not causing any problem.

Running of this shell script, script.sh, is causing distortion in the audio data. 

Update rate of the executables is might be in micro-seconds. We exactly have no idea about it. We will find it and will share it as soon as possible. 

Kindly provide any solution on the basis of above mentioned facts on urgent basis. 

Thanks.

anlg said:

We are using UART in our design to communicate between PL to PS and vice versa. To control the PS-PL communication, we have to execute that audio drivers (audio.exe).

This seems very strange. Why not use AXI?

anlg said:

Update rate of the executables is might be in micro-seconds. We exactly have no idea about it. We will find it and will share it as soon as possible. 

Are you maxing out the ARM cores you are writing so often? What is the processor utilization when running these scripts together?

-Travis

I could not check the processor utilization when running scripts in the serial terminal. We are using custom uart for our design that has to transmit more bits than the AXI offers. 

Thanks