Hi,
I'm developing on OMAP-L137 EVM.
I could run the "sample program". All work normally.
Sample Program : Forwarding Line In sound to play at Line Out work normally. (Left and right work correctly)
I found some noise issue in DAC.
My configuration:
Only plug speaker in Line Out port.
Don't plug anything in Line In port.
Program A:
1. write sin_wave into Left DAC.
2. read the value of Right ADC. Write that value to Right DAC.
I could hear the clear and right sin_wave in Left Speaker (through LDAC).
I also hear some weak sound in Right Speaker (through RDAC). That weak sound is the replication of above sin_wave.
It seems Right ADC was impact by Left DAC....
Could someone give me some hint to debug? Thx!