From 94411df91f28afa76b67b2046db5e1d8f3fdb678 Mon Sep 17 00:00:00 2001
From: dragonmux <git@dragonmux.network>
Date: Mon, 29 Apr 2024 11:05:09 +0100
Subject: [PATCH] stm32/common: Implemented oversampling control support for
 the F2/F4 parts

---
 .../libopencm3/stm32/common/usart_common_f24.h   | 16 ++++++++++++++++
 lib/stm32/common/usart_common_f124.c             |  9 +++++++++
 2 files changed, 25 insertions(+)

diff --git a/include/libopencm3/stm32/common/usart_common_f24.h b/include/libopencm3/stm32/common/usart_common_f24.h
index 1d226fa7..df87c6e7 100644
--- a/include/libopencm3/stm32/common/usart_common_f24.h
+++ b/include/libopencm3/stm32/common/usart_common_f24.h
@@ -89,6 +89,16 @@ specific memorymap.h header before including this header file.*/
 /* OVER8: Oversampling mode */
 #define USART_CR1_OVER8			(1 << 15)
 
+/* 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
+/**@}*/
+
 /* --- USART_CR3 values ---------------------------------------------------- */
 
 /* ONEBIT: One sample bit method enable */
@@ -96,6 +106,12 @@ specific memorymap.h header before including this header file.*/
 
 #define USART_BRR_UPPER_MASK (0x0000fff0U)
 #define USART_BRR_LOWER_MASK (0x0000000fU)
+
+BEGIN_DECLS
+
+void usart_set_oversampling(uint32_t usart, uint32_t mode);
+
+END_DECLS
 #endif
 /** @cond */
 #else
diff --git a/lib/stm32/common/usart_common_f124.c b/lib/stm32/common/usart_common_f124.c
index 653b23e2..32f21e49 100644
--- a/lib/stm32/common/usart_common_f124.c
+++ b/lib/stm32/common/usart_common_f124.c
@@ -110,5 +110,14 @@ bool usart_get_flag(uint32_t usart, uint32_t flag)
 	return ((USART_SR(usart) & flag) != 0);
 }
 
+#ifdef LIBOPENCM3_USART_COMMON_F24_H
+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;
+}
+#endif
 
 /**@}*/