From: Doug Szumski <d.s.szumski@gmail.com>
Date: Sat, 16 Aug 2014 13:15:58 +0000 (+0200)
Subject: twi: Clear TWSTO bit after STOP condition transmitted
X-Git-Tag: v1.3~73^2
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=301121cce45e4db4c1d0e66d16dc42cb1246e36b;p=sx%2Fsimavr.git

twi: Clear TWSTO bit after STOP condition transmitted

> This change fixes a problem where a TWI driver polling the
  TWSTO bit would run on the real device but not simavr.

> More detail in for example p188 of the ATMega32A datasheet
  (rev 815D-AVR-10/2013).
---

diff --git a/simavr/sim/avr_twi.c b/simavr/sim/avr_twi.c
index 808da9d..663357e 100644
--- a/simavr/sim/avr_twi.c
+++ b/simavr/sim/avr_twi.c
@@ -182,6 +182,7 @@ avr_twi_write(
 			if (p->state & TWI_COND_START) {
 				avr_raise_irq(p->io.irq + TWI_IRQ_OUTPUT,
 						avr_twi_irq_msg(TWI_COND_STOP, p->peer_addr, 1));
+				avr_regbit_clear(avr, p->twsto);
 			}
 		}
 		p->state = 0;