From: Michel Pollet <buserror@gmail.com>
Date: Wed, 10 Jun 2015 20:00:38 +0000 (+0100)
Subject: twi: Revert to NO_STATE after a stop
X-Git-Tag: v1.3~36
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=871d22206df3a9aa47d888f88edc7dc784f12ad6;p=sx%2Fsimavr.git

twi: Revert to NO_STATE after a stop

Otherwise the interrupt might get re-triggered

Signed-off-by: Michel Pollet <buserror@gmail.com>
---

diff --git a/simavr/sim/avr_twi.c b/simavr/sim/avr_twi.c
index fffd86b..c13be6c 100644
--- a/simavr/sim/avr_twi.c
+++ b/simavr/sim/avr_twi.c
@@ -173,7 +173,7 @@ avr_twi_write(
 	/*int cleared = */avr_clear_interrupt_if(avr, &p->twi, twint);
 //	AVR_TRACE(avr, "cleared %d\n", cleared);
 
-	if (/*!twsto && */ avr_regbit_get(avr, p->twsto)) {
+	if (!twsto && avr_regbit_get(avr, p->twsto)) {
 		// generate a stop condition
 #if AVR_TWI_DEBUG
 		AVR_TRACE(avr, "<<<<< I2C stop\n");
@@ -186,6 +186,7 @@ avr_twi_write(
 		}
 		/* clear stop condition regardless of status */
 		avr_regbit_clear(avr, p->twsto);
+		_avr_twi_status_set(p, TWI_NO_STATE, 0);
 		p->state = 0;
 	}
 	if (!twsta && avr_regbit_get(avr, p->twsta)) {
@@ -286,7 +287,7 @@ avr_twi_write(
 			else
 				AVR_TRACE(avr, "I2C latch is not ready, do nothing\n");
 #endif
-		} else {
+		} else if (p->state) {
 #if AVR_TWI_DEBUG
 			AVR_TRACE(avr, "I2C Master address %02x\n", avr->data[p->r_twdr]);
 #endif
@@ -452,6 +453,7 @@ void avr_twi_reset(struct avr_io_t *io)
 	avr_twi_t * p = (avr_twi_t *)io;
 	avr_irq_register_notify(p->io.irq + TWI_IRQ_INPUT, avr_twi_irq_input, p);
 	p->state = p->peer_addr = 0;
+	avr_regbit_setto_raw(p->io.avr, p->twsr, TWI_NO_STATE);
 }
 
 static const char * irq_names[TWI_IRQ_COUNT] = {