Add PDC header file

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2486 42af7a65-404d-4744-a932-0658087f49c3

arch/arm/src/sam3u/sam3u_pdc.h

+/****************************************************************************************
+ * arch/arm/src/sam3u/sam3u_pdc.h
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_SAM3U_SAM3U_PDC_H
+#define __ARCH_ARM_SRC_SAM3U_SAM3U_PDC_H
+
+/****************************************************************************************
+ * Included Files
+ ****************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "chip.h"
+#include "sam3u_memorymap.h"
+
+/****************************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************************/
+
+/* PDC register offsets *****************************************************************/
+
+#define SAM3U_PDC_RPR_OFFSET         0x100 /* Receive Pointer Register */
+#define SAM3U_PDC_RCR_OFFSET         0x104 /* Receive Counter Register */
+#define SAM3U_PDC_TPR_OFFSET         0x108 /* Transmit Pointer Register */
+#define SAM3U_PDC_TCR_OFFSET         0x10c /* Transmit Counter Register */
+#define SAM3U_PDC_RNPR_OFFSET        0x110 /* Receive Next Pointer Register */
+#define SAM3U_PDC_RNCR_OFFSET        0x114 /* Receive Next Counter Register */
+#define SAM3U_PDC_TNPR_OFFSET        0x118 /* Transmit Next Pointer Register */
+#define SAM3U_PDC_TNCR_OFFSET        0x11c /* Transmit Next Counter Register */
+#define SAM3U_PDC_PTCR_OFFSET        0x120 /* Transfer Control Register */
+#define SAM3U_PDC_PTSR_OFFSET        0x124 /* Transfer Status Register */
+
+/* PDC register adresses ****************************************************************/
+
+/* These 10 registers are mapped in the peripheral memory space at the same offset. */
+
+/* PDC register bit definitions *********************************************************/
+
+#define PDC_RCR_RXCTR_SHIFT          (0)      /* Bits 0-15:  Receive Counter Register */
+#define PDC_RCR_RXCTR_MASK           (0xffff << PDC_RCR_RXCTR_SHIFT)
+
+#define PDC_TCR_TXCTR_SHIFT          (0)      /* Bits 0-15:  Transmit Counter Register */
+#define PDC_TCR_TXCTR_MASK           (0xffff << PDC_TCR_TXCTR_SHIFT)
+
+#define PDC_RNCR_RXNCTR_SHIFT        (0)      /* Bits 0-15:  Receive Next Counter */
+#define PDC_RNCR_RXNCTR_MASK         (0xffff << PDC_RNCR_RXNCTR_SHIFT)
+
+#define PDC_TNCR_TXNCTR_SHIFT        (0)      /* Bits 0-15:   Transmit Counter Next */
+#define PDC_TNCR_TXNCTR_MASK         (0xffff << PDC_TNCR_TXNCTR_SHIFT)
+
+#define PDC_PTCR_RXTEN               (1 << 0)  /* Bit 0:  Receiver Transfer Enable */
+#define PDC_PTCR_RXTDIS              (1 << 1)  /* Bit 1:  Receiver Transfer Disable */
+#define PDC_PTCR_TXTEN               (1 << 8)  /* Bit 8:  Transmitter Transfer Enable */
+#define PDC_PTCR_TXTDIS              (1 << 9)  /* Bit 9:  Transmitter Transfer Disable */
+
+#define PDC_PTSR_RXTEN               (1 << 0)  /* Bit 0:  Receiver Transfer Enable */
+#define PDC_PTSR_TXTEN               (1 << 8)  /* Bit 8:  Transmitter Transfer Enable */
+
+/****************************************************************************************
+ * Public Types
+ ****************************************************************************************/
+
+/****************************************************************************************
+ * Public Data
+ ****************************************************************************************/
+
+/****************************************************************************************
+ * Public Functions
+ ****************************************************************************************/
+
+#endif /* __ARCH_ARM_SRC_SAM3U_SAM3U_PDC_H */