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stm32/usart: Implemented a function to get the current stop bits setting for a USART

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This commit is contained in:
dragonmux
2022-08-15 17:58:18 +01:00
committed by Piotr Esden-Tempski
parent 0241982fb4
commit 48a8355874
2 changed files with 17 additions and 0 deletions
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1
include/libopencm3/stm32/common/usart_common_all.h
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@@ -102,6 +102,7 @@ void usart_set_baudrate(uint32_t usart, uint32_t baud);
void usart_set_databits(uint32_t usart, uint32_t bits); void usart_set_databits(uint32_t usart, uint32_t bits);
uint32_t usart_get_databits(uint32_t usart); uint32_t usart_get_databits(uint32_t usart);
void usart_set_stopbits(uint32_t usart, uint32_t stopbits); void usart_set_stopbits(uint32_t usart, uint32_t stopbits);
uint32_t usart_get_stopbits(uint32_t usart);
void usart_set_parity(uint32_t usart, uint32_t parity); void usart_set_parity(uint32_t usart, uint32_t parity);
void usart_set_mode(uint32_t usart, uint32_t mode); void usart_set_mode(uint32_t usart, uint32_t mode);
void usart_set_flow_control(uint32_t usart, uint32_t flowcontrol); void usart_set_flow_control(uint32_t usart, uint32_t flowcontrol);

16
lib/stm32/common/usart_common_all.c
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@@ -135,6 +135,22 @@ void usart_set_stopbits(uint32_t usart, uint32_t stopbits)
USART_CR2(usart) = reg32; USART_CR2(usart) = reg32;
} }
/*---------------------------------------------------------------------------*/
/** @brief USART Get Stop Bit(s).
The stop bits are specified as 0.5, 1, 1.5 or 2.
@param[in] usart unsigned 32 bit. USART block register address base @ref
usart_reg_base
@returns unsigned 32 bit Stop bits @ref usart_cr2_stopbits.
*/
uint32_t usart_get_stopbits(uint32_t usart)
{
const uint32_t reg32 = USART_CR2(usart);
return reg32 & USART_CR2_STOPBITS_MASK;
}
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
/** @brief USART Set Parity. /** @brief USART Set Parity.