Merge TinyOS 2.1.1 into master.

[tinyos-2.x.git] / tos / platforms / mulle / softwarespi / SoftSpiMasterPacketP.nc

diff --git a/tos/platforms/mulle/softwarespi/SoftSpiMasterPacketP.nc b/tos/platforms/mulle/softwarespi/SoftSpiMasterPacketP.nc
new file mode 100755 (executable)
index 0000000..87cbab8
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+++ b/tos/platforms/mulle/softwarespi/SoftSpiMasterPacketP.nc
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+/*
+ * Copyright (c) 2009 Communication Group and Eislab at
+ * Lulea University of Technology
+ *
+ * Contact: Laurynas Riliskis, LTU
+ * Mail: laurynas.riliskis@ltu.se
+ * All rights reserved.
+ *
+ *
+ * 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 Communication Group at Lulea University of Technology
+ *   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 STANFORD
+ * UNIVERSITY OR ITS 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.
+ */
+
+/*
+ * Copyright (c) 2006 Stanford University.
+ * All rights reserved.
+ *
+ * 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 the Stanford University 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 STANFORD
+ * UNIVERSITY OR ITS 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.
+ *
+ * @author Philip Levis
+ */
+
+/**
+ * This driver implements an software Spi Master controller.
+ *
+ * @author Henrik Makitaavola <henrik.makitaavola@gmail.com>
+ */
+
+generic module SoftSpiMasterPacketP()
+{
+  provides interface AsyncStdControl;
+  provides interface SpiByte;
+  provides interface SpiPacket;
+  
+  uses interface SoftSpiBus as Spi;
+}
+implementation
+{
+  enum
+  {
+    SPI_OFF          = 0,
+    SPI_IDLE         = 1,
+    SPI_BUSY         = 2,      
+  } soft_spi_state_t;
+
+  uint8_t state = SPI_OFF;
+
+  async command error_t AsyncStdControl.start()
+  {
+    atomic
+    {
+      if (state == SPI_OFF)
+      {
+           call Spi.init();
+           state = SPI_IDLE;
+           return SUCCESS;
+      }
+      else
+      {
+           return FAIL;
+      }
+    }
+  }
+
+  async command error_t AsyncStdControl.stop()
+  {
+    atomic
+    {
+      if (state == SPI_IDLE)
+      {
+           call Spi.off();
+           state = SPI_OFF;
+           return SUCCESS;
+      }
+      else
+      {
+           return FAIL;
+      }
+    }
+  }
+
+  async command uint8_t SpiByte.write( uint8_t tx )
+  {
+    uint8_t rx;
+    atomic
+    {
+      if (state == SPI_IDLE)
+      {
+           state = SPI_BUSY;
+      }
+      else if (state == SPI_OFF)
+      {
+           return EOFF;
+      }
+      else
+      {
+           return EBUSY;
+      }
+    }
+    atomic
+    {
+      rx = call Spi.write(tx);
+      state = SPI_IDLE;
+    }
+    return rx;
+  }
+  
+  async command error_t SpiPacket.send( uint8_t* txBuf, uint8_t* rxBuf, uint16_t len )
+  {
+    uint8_t i;
+    atomic
+    {
+      if (state == SPI_IDLE)
+      {
+           state = SPI_BUSY;
+      }
+      else if (state == SPI_OFF)
+      {
+           return EOFF;
+      }
+      else
+      {
+           return EBUSY;
+      }
+    }
+    atomic
+    {
+      for(i = 0; i < len; ++i)
+      {
+        rxBuf[i] = call Spi.write(txBuf[i]);
+      }
+      state = SPI_IDLE;
+    }
+    signal SpiPacket.sendDone(txBuf, rxBuf, len, SUCCESS);
+    return SUCCESS;
+  }
+
+  default async event void SpiPacket.sendDone( uint8_t* txBuf,
+                                               uint8_t* rxBuf,
+                                               uint16_t len,
+                                               error_t error ) {}
+}