Part Number: BEAGLEBK
Sending a lin break signal is not supported by the hardware for the am335. A workaround to this is to decrease the baud rate by 30% and send a 0x00 byte and restore the original baud rate.
The issue I am having is after this I do a write which is fine and then I perform a read, but this never receives any bytes. I am wondering is the uart in some bad state after shifting the baud rate. Is their some cleanup to be performed. I am using direct register writes for changing the baud rate as the posix interface only allows setting default baud rates.
Here is what I do when I am sending my break signal
// Get access to Divisor Latch registers
// Disable mode select
// Save current baud rate settings
// Change baud rate to custom value (DLH/DLL)
// Disable divisor latch access
// write 0x00
// Get access to Divisor Latch registers
// Disable mode select
// Restore baud rate to original value
// Disable divisor latch
Also I read that when accessing the mdr1 register there is a bug and a dedicated fix which I have implemented (http://www.ti.com/lit/er/sprz444a/sprz444a.pdf) - i202 MDR1 Access Can Freeze UART Module
Then I perform a write (which looks fine on logic analyser)
Then I perform a read and doesn't receive anything (on logic analyser I can see the data on the line to be read)
