diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32_serial.c')
| -rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_serial.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_serial.c b/nuttx/arch/arm/src/stm32/stm32_serial.c index 6b56165db..e2a0da226 100644 --- a/nuttx/arch/arm/src/stm32/stm32_serial.c +++ b/nuttx/arch/arm/src/stm32/stm32_serial.c @@ -1741,6 +1741,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg) /* Change the TX port to be open-drain/push-pull and enable/disable * half-duplex mode. */ + uint32_t cr = up_serialin(priv, STM32_USART_CR3_OFFSET); #if defined(CONFIG_STM32_STM32F10XX) if (arg == SER_SINGLEWIRE_ENABLED) @@ -1769,7 +1770,7 @@ static int up_ioctl(struct file *filep, int cmd, unsigned long arg) up_serialout(priv, STM32_USART_CR3_OFFSET, cr); } - break; + break; #endif #ifdef CONFIG_SERIAL_TERMIOS |