From: Philip Åkesson <philip.akesson@gmail.com>
Date: Mon, 28 Nov 2016 15:02:02 +0000 (+0100)
Subject: Workaround for UART issues when polling in some cases
X-Git-Tag: v1.5~18^2
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=8467783d44dc5b36a7b1fcb8c70403238f41ce1a;p=sx%2Fsimavr.git

Workaround for UART issues when polling in some cases

Clear interrupt instead of just the rxc bit
---

diff --git a/simavr/sim/avr_uart.c b/simavr/sim/avr_uart.c
index 0fff236..2a69c16 100644
--- a/simavr/sim/avr_uart.c
+++ b/simavr/sim/avr_uart.c
@@ -98,8 +98,9 @@ static uint8_t avr_uart_read(struct avr_t * avr, avr_io_addr_t addr, void * para
 {
 	avr_uart_t * p = (avr_uart_t *)param;
 
-	// clear the rxc bit in case the code is using polling
-	avr_regbit_clear(avr, p->rxc.raised);
+	// clear the rxc interrupt in case the code is using polling
+	uint8_t rxc = avr_regbit_get(avr, p->rxc.raised);
+	avr_clear_interrupt_if(avr, &p->rxc, rxc);
 
 	if (!avr_regbit_get(avr, p->rxen)) {
 		avr->data[addr] = 0;