From 0e3d2806559171bf856402b123f35481e9ce5f88 Mon Sep 17 00:00:00 2001
From: "Sascha Schade (strongly-typed)" <stronglytyp3d@gmail.com>
Date: Sun, 1 May 2022 14:17:02 +0200
Subject: [PATCH] [stm32] Uart: Add transmission complete flag

---
 src/modm/platform/uart/stm32/uart_hal.hpp.in      |  4 ++++
 src/modm/platform/uart/stm32/uart_hal_impl.hpp.in | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/modm/platform/uart/stm32/uart_hal.hpp.in b/src/modm/platform/uart/stm32/uart_hal.hpp.in
index 5d6e4ba162..32a5f57c36 100644
--- a/src/modm/platform/uart/stm32/uart_hal.hpp.in
+++ b/src/modm/platform/uart/stm32/uart_hal.hpp.in
@@ -118,6 +118,10 @@ public:
 	static inline bool
 	isTransmitRegisterEmpty();
 
+	/// Returns true if the transmission of a frame containing data is complete
+	static inline bool
+	isTransmissionComplete();
+
 	static inline void
 	enableInterruptVector(bool enable, uint32_t priority);
 
diff --git a/src/modm/platform/uart/stm32/uart_hal_impl.hpp.in b/src/modm/platform/uart/stm32/uart_hal_impl.hpp.in
index 623801a7f0..f24d5e9a88 100644
--- a/src/modm/platform/uart/stm32/uart_hal_impl.hpp.in
+++ b/src/modm/platform/uart/stm32/uart_hal_impl.hpp.in
@@ -210,6 +210,16 @@ bool
 %% endif
 }
 
+bool
+{{ hal }}::isTransmissionComplete()
+{
+%% if extended_driver
+	return {{ peripheral }}->ISR & USART_ISR_TC;
+%% else
+	return {{ peripheral }}->SR & USART_SR_TC;
+%% endif
+}
+
 void
 {{ hal }}::enableInterruptVector(bool enable, uint32_t priority)
 {