diff --git a/ports/arm/platforms/dm36x/dm36x-io.h b/ports/arm/platforms/dm36x/dm36x-io.h
index 9b9677c..f5467b5 100644
--- a/ports/arm/platforms/dm36x/dm36x-io.h
+++ b/ports/arm/platforms/dm36x/dm36x-io.h
@@ -568,6 +568,26 @@
 #define DM36X_SD_MMCFIFOCTL 0x74
 
 
+/** McBSP registers */
+#define DM36X_MCBPSP_BASE   0x01D02000 /* McBSP */
+#define DM36X_MCBSP_DRR     0x00
+#define DM36X_MCBSP_DXR     0x04
+#define DM36X_MCBSP_SPCR    0x08
+#define DM36X_MCBSP_RCR     0x0C
+#define DM36X_MCBSP_XCR     0x10
+#define DM36X_MCBSP_SRGR    0x14
+#define DM36X_MCBSP_MCR     0x18
+#define DM36X_MCBSP_RCER0   0x1C
+#define DM36X_MCBSP_XCER0   0x20
+#define DM36X_MCBSP_PCR     0x24
+#define DM36X_MCBSP_RCERE1  0x28
+#define DM36X_MCBSP_XCERE1  0x2C
+#define DM36X_MCBSP_RCERE2  0x30
+#define DM36X_MCBSP_XCERE2  0x34
+#define DM36X_MCBSP_RCERE3  0x38
+#define DM36X_MCBSP_XCERE3  0x3C
+
+
 /* Function prototypes */
 extern int              low_level_init (void) ;