mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix STM32F2XX USART data register readout

Browse Source 
Fix issue where the data register may be overwritten by next character
reception before being read and returned.

Signed-off-by: Olivier Hériveaux <olivier.heriveaux@ledger.fr>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20211128120723.4053-1-olivier.heriveaux@ledger.fr
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Olivier Hériveaux 2021-11-28 13:07:23 +01:00 committed by Peter Maydell
parent b662fac6aa
commit ab08c34676
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
hw/char/stm32f2xx_usart.c
View File

@ -103,10 +103,11 @@ static uint64_t stm32f2xx_usart_read(void *opaque, hwaddr addr,
return retvalue;
case USART_DR:
DB_PRINT("Value: 0x%" PRIx32 ", %c\n", s->usart_dr, (char) s->usart_dr);
retvalue = s->usart_dr & 0x3FF;
s->usart_sr &= ~USART_SR_RXNE;
qemu_chr_fe_accept_input(&s->chr);
qemu_set_irq(s->irq, 0);
return s->usart_dr & 0x3FF;
return retvalue;
case USART_BRR:
return s->usart_brr;
case USART_CR1: