From: Sami Liedes <sliedes@cc.hut.fi>
Date: Mon, 28 Feb 2011 21:33:08 +0000 (+0200)
Subject: Do not let code clear the UDRE flag in USART.
X-Git-Tag: v1.0a7~2
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=9f4d192d318aedee0ff964033a7accf6e9b544ed;p=sx%2Fsimavr.git

Do not let code clear the UDRE flag in USART.

It's a read only location and clearing it may break software that
assumes it cannot be cleared.

Signed-off-by: Sami Liedes <sliedes@cc.hut.fi>
---

diff --git a/simavr/sim/avr_uart.c b/simavr/sim/avr_uart.c
index a297bb9..4e6f0e5 100644
--- a/simavr/sim/avr_uart.c
+++ b/simavr/sim/avr_uart.c
@@ -158,14 +158,14 @@ static void avr_uart_write(struct avr_t * avr, avr_io_addr_t addr, uint8_t v, vo
 	}
 	if (addr == p->udrc.raised.reg) {
 		// get the bits before the write
-		uint8_t udre = avr_regbit_get(avr, p->udrc.raised);
+		//uint8_t udre = avr_regbit_get(avr, p->udrc.raised);
 		uint8_t txc = avr_regbit_get(avr, p->txc.raised);
 
 		// no need to write this value in here, only the
 		// interupt flags needs clearing!
 		// avr_core_watch_write(avr, addr, v);
 
-		avr_clear_interupt_if(avr, &p->udrc, udre);
+		//avr_clear_interupt_if(avr, &p->udrc, udre);
 		avr_clear_interupt_if(avr, &p->txc, txc);
 	}
 }