Application returns to wrong place on RTI

Discussion created by volt on Apr 11, 2011
Latest reply on Apr 27, 2011 by PrasanthR
Branched from an earlier discussion

Hi everyone, thanks Craig for help.

I try to use UART0 interrupts. I initialize EVT8 as isr_uart0_rx, EVT10 as isr_uart0_tx. I use Terminal program to send and receive bytes from PC to my target board. I send one byte to target board, isr_uart0_rx works correctly, everything is ok, but when I try to send this byte to PC I have a problem. In my dispatcher I send this byte to uart0_thr register, then interrupt isr_uart0_tx generates in this interrupt I read uart_iir register and after rti command my program return to wrong place (my program return to command send byte in dispatcher and I send this byte once more). I control send and receive bytes with oscilloscope.

Does anybody know what's wrong?.

Thanks for help.