Platform-specific devices.

2007-06-28 12:52:41 +00:00 · 2007-06-28 12:52:41 +00:00 · ae2e9f3677
commit ae2e9f3677
parent 792056e325
16 changed files with 2399 additions and 0 deletions
--- a/platform/msb430/dev/sdspi.c
+++ b/platform/msb430/dev/sdspi.c
@ -0,0 +1,147 @@
+
+/*
+Copyright 2007, Freie Universitaet Berlin. All rights reserved.
+
+These sources were developed at the Freie Universität Berlin, Computer
+Systems and Telematics group.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+- Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+
+- 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.
+ 
+- Neither the name of Freie Universitaet Berlin (FUB) 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 FUB and the contributors on an "as is"
+basis, without any representations or warranties of any kind, express
+or implied including, but not limited to, representations or
+warranties of non-infringement, merchantability or fitness for a
+particular purpose. In no event shall FUB 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.
+
+This implementation was developed by the CST group at the FUB.
+
+For documentation and questions please use the web site
+http://scatterweb.mi.fu-berlin.de and the mailinglist
+scatterweb@lists.spline.inf.fu-berlin.de (subscription via the Website).
+Berlin, 2007
+*/
+
+
+/**
+ * @file	ScatterWeb.Spi.c
+ * @ingroup	libsdspi
+ * @brief	Serial Peripheral Interface for SD library
+ * 
+ * @author	Michael Baar	<baar@inf.fu-berlin.de>
+ * @date	2007
+ * @version	1.0
+ */
+
+#include <io.h>
+#include <signal.h>
+#include <string.h>
+
+#include "contiki-msb430.h"
+
+#define	SPI_IDLE_SYMBOL		0xFF
+
+void
+spi_init(void)
+{
+
+  /* The 16-bit value of UxBR0+UxBR1 is the division factor of the USART clock
+   * source, BRCLK. The maximum baud rate that can be generated in master
+   * mode is BRCLK/2. The maximum baud rate that can be generated in slave
+   * mode is BRCLK. The modulator in the USART baud rate generator is not used
+   * for SPI mode and is recommended to be set to 000h. The UCLK frequency is
+   * given by:
+   * Baud rate = BRCLK / UxBR             with UxBR= [UxBR1, UxBR0]
+   */
+  uart_set_speed(UART_MODE_SPI, 0x02, 0x00, 0x00);
+}
+
+UINT8
+spi_rx(void)
+{
+  UART_RESET_RX();
+  UART_TX = SPI_IDLE_SYMBOL;
+  UART_WAIT_RX();
+  return (UART_RX);
+}
+
+void
+spi_tx(register const UINT8 c)
+{
+  UART_RESET_RX();
+  UART_TX = c;
+  UART_WAIT_RX();
+}
+
+void
+spi_read(void *pDestination, const UINT16 size, const bool incDest)
+{
+  register UINT8 *p = (UINT8 *) pDestination;
+  register UINT16 i;
+
+  for (i = size; i > 0; i--) {
+    *p = spi_rx();
+    if (incDest)
+      p++;
+  }
+}
+
+void
+spi_write(const void *pSource, const UINT16 size, const UINT8 startToken,
+	  const bool incSource)
+{
+  register unsigned char *p = (unsigned char *) pSource;
+  register UINT16 i;
+
+  spi_tx(startToken);
+  for (i = size; i > 0; i--) {
+    spi_tx(*p);
+    if (incSource)
+      p++;
+  }
+}
+
+void
+spi_idle(register const UINT16 clocks)
+{
+  register UINT16 i;
+
+  for (i = 0; i < clocks; i++) {
+    UART_RESET_RX();
+    UART_TX = SPI_IDLE_SYMBOL;
+    UART_WAIT_RX();
+  }
+}
+
+UINT8
+spi_wait_token(const UINT8 token, const UINT16 timeout)
+{
+  UINT16 i;
+  UINT8 rx;
+
+  for (i = 0; i < timeout; i++) {
+    rx = spi_rx();
+    if (rx == token)
+      return true;
+  }
+  return false;
+}