X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fsamd21%2Fao_dma_samd21.h;h=57f54769d45258ecc32b1246067dfa5479e6369d;hb=HEAD;hp=725e621a3a5d1377d588cbb185482f42e297213d;hpb=c59892cd337162c63e5d7ba8e8eec779d201022d;p=fw%2Faltos

diff --git a/src/samd21/ao_dma_samd21.h b/src/samd21/ao_dma_samd21.h
index 725e621a..57f54769 100644
--- a/src/samd21/ao_dma_samd21.h
+++ b/src/samd21/ao_dma_samd21.h
@@ -24,7 +24,7 @@ ao_dma_init(void);
 
 void
 _ao_dma_start_transfer(uint8_t		id,
-		       void		*src,
+		       const void	*src,
 		       void		*dst,
 		       uint16_t		count,
 		       uint32_t		chctrlb,
@@ -38,4 +38,12 @@ _ao_dma_done_transfer(uint8_t id);
 void
 ao_dma_dump(char *where);
 
+/*
+ * DMA is only used for SERCOM
+ */
+
+#define AO_SERCOM_DMA_BASE			0U
+#define AO_SERCOM_INPUT_DMA_ID(id)		((uint8_t) ((id) * 2U + 0U + AO_SERCOM_DMA_BASE))
+#define AO_SERCOM_OUTPUT_DMA_ID(id)		((uint8_t) ((id) * 2U + 1U + AO_SERCOM_DMA_BASE))
+
 #endif /* _AO_DMA_SAM21_H_ */