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[Qemu-devel] [PATCH] hw/char/stm32f2xx_usart: Do not update data registe
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH] hw/char/stm32f2xx_usart: Do not update data register when device is disabled |
Date: |
Fri, 4 Jan 2019 19:20:57 +0100 |
When the device is disable, the internal circuitry keep the data
register loaded and doesn't update it.
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
hw/char/stm32f2xx_usart.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/hw/char/stm32f2xx_usart.c b/hw/char/stm32f2xx_usart.c
index f3363a2952..10392c70e2 100644
--- a/hw/char/stm32f2xx_usart.c
+++ b/hw/char/stm32f2xx_usart.c
@@ -53,14 +53,13 @@ static void stm32f2xx_usart_receive(void *opaque, const
uint8_t *buf, int size)
{
STM32F2XXUsartState *s = opaque;
- s->usart_dr = *buf;
-
if (!(s->usart_cr1 & USART_CR1_UE && s->usart_cr1 & USART_CR1_RE)) {
/* USART not enabled - drop the chars */
DB_PRINT("Dropping the chars\n");
return;
}
+ s->usart_dr = *buf;
s->usart_sr |= USART_SR_RXNE;
if (s->usart_cr1 & USART_CR1_RXNEIE) {
--
2.17.2
- [Qemu-devel] [PATCH] hw/char/stm32f2xx_usart: Do not update data register when device is disabled,
Philippe Mathieu-Daudé <=