e479fb39412f9fb7b1110facd6867997ef839e5d

	modified:   sim/avr_uart.c

Previously, disabling the uart transmitter cleared the udrc
	interrupt and cleared the udre (udrc.raised) flag.  Upon
	reenabling the transmitter, the udre flag is still clear
	signifying the buffer is full, thus waiting for the udr to
	clear via udre flag hangs.

diff --git a/simavr/sim/avr_uart.c b/simavr/sim/avr_uart.c
index 4e3db86c610fdbf544fdec79ce16be85867e87eb..55941705c861e5c9c1b0d1b261430b32bbca21d8 100644 (file)
--- a/simavr/sim/avr_uart.c
+++ b/simavr/sim/avr_uart.c
@@ -405,6 +405,8 @@ avr_uart_write(
        if (new_txen != txen) {
                if (p->udrc.vector && !new_txen) {
                        avr_uart_clear_interrupt(avr, &p->udrc);
+               } else {
+                       avr_regbit_set(avr, p->udrc.raised);
                }
        }
 }