stm32/common: Implement support for DE and changing the oversampling …

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blackmagic-debug · Aug 11, 2024 · 11f9908 · 11f9908
1 parent b7ba56d
commit 11f9908
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diff --git a/include/libopencm3/stm32/common/usart_common_v2.h b/include/libopencm3/stm32/common/usart_common_v2.h
@@ -292,6 +292,16 @@
 #define USART_CR1_UE			(1 << 0)
 /**@}*/
 
+/* CR1_OVER8 values */
+/****************************************************************************/
+/** @defgroup usart_cr1_oversampling USART Oversampling Mode Selection
+@ingroup STM32F_usart_defines
+
+@{*/
+#define USART_OVERSAMPLING_8  USART_CR1_OVER8
+#define USART_OVERSAMPLING_16 0U
+/**@}*/
+
 /*------------------------------------------------*/
 /** @defgroup usart_cr2_values USART_CR2 Values
 @ingroup usart_defines
@@ -630,4 +640,7 @@ void usart_disable_rx_timeout(uint32_t usart);
 void usart_enable_rx_timeout_interrupt(uint32_t usart);
 void usart_disable_rx_timeout_interrupt(uint32_t usart);
 
+void usart_enable_diver_enable(uint32_t usart, bool invert);
+void usart_set_oversampling(uint32_t usart, uint32_t mode);
+
 END_DECLS
diff --git a/lib/stm32/common/usart_common_v2.c b/lib/stm32/common/usart_common_v2.c
@@ -302,5 +302,29 @@ bool usart_get_flag(uint32_t usart, uint32_t flag)
 	return ((USART_ISR(usart) & flag) != 0);
 }
 
+/** @brief USART Enable the Driver Enable signal out of the RTS pin
+ *
+ * @param[in] usart unsigned 32 bit. USART block register address base @ref
+ * usart_reg_base
+ */
+void usart_enable_diver_enable(uint32_t usart, bool invert)
+{
+	uint32_t reg = USART_CR3(usart);
+	if (invert) {
+		reg |= USART_CR3_DEP;
+	} else {
+		reg &= ~USART_CR3_DEP;
+	}
+	reg |= USART_CR3_DEM;
+	USART_CR3(usart) = reg;
+}
+
+void usart_set_oversampling(uint32_t usart, uint32_t mode)
+{
+	if (mode)
+		USART_CR1(usart) |= USART_CR1_OVER8;
+	else
+		USART_CR1(usart) &= ~USART_CR1_OVER8;
+}
 
 /**@}*/