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iam trying to configure my serial port to look back mode programmatically can anybody please let me know how i can achive this.
Modem Control Register (MCR) of serial port
Bit 7 Reserved
Bit 6 Reserved
Bit 5 Autoflow Control Enabled (16750 only)
Bit 4 LoopBack Mode
Bit 3 Aux Output 2
Bit 2 Aux Output 1
Bit 1 Force Request to Send
Bit 0 Force Data Terminal Ready
i want to set bit 4 of mcr register how can i achive this programatically is there any syscalls/Apis avilable? or do i need go kernel programing?
if you have any information regarding please let me know
if you have serial port loop back test working code please share with me iam in urgent need