From a2fc8768c60acdc01b5907984c4f5b79575d4c47 Mon Sep 17 00:00:00 2001
From: Jeff Ciesielski <jeff.ciesielski@convergeddevices.net>
Date: Fri, 19 Oct 2012 16:28:44 -0700
Subject: [PATCH] stm32/f1/dma: add clear_flag helper function

---
 include/libopencm3/stm32/f1/dma.h | 1 +
 lib/stm32/f1/dma.c                | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/include/libopencm3/stm32/f1/dma.h b/include/libopencm3/stm32/f1/dma.h
index b08803f7..8a2edbad 100644
--- a/include/libopencm3/stm32/f1/dma.h
+++ b/include/libopencm3/stm32/f1/dma.h
@@ -369,6 +369,7 @@ void dma_disable_channel(u32 dma, u8 channel);
 void dma_set_peripheral_address(u32 dma, u8 channel, u32 address);
 void dma_set_memory_address(u32 dma, u8 channel, u32 address);
 void dma_set_number_of_data(u32 dma, u8 channel, u16 number);
+void dma_clear_flag(u32 dma, u32 flag);
 
 END_DECLS
 
diff --git a/lib/stm32/f1/dma.c b/lib/stm32/f1/dma.c
index 04cb8a10..2bc89265 100644
--- a/lib/stm32/f1/dma.c
+++ b/lib/stm32/f1/dma.c
@@ -363,5 +363,10 @@ void dma_set_number_of_data(u32 dma, u8 channel, u16 number)
 {
 	DMA_CNDTR(dma, channel) = number;
 }
+
+void dma_clear_flag(u32 dma, u32 flag)
+{
+	DMA_ISR(dma) &= ~flag;
+}
 /**@}*/