--- /dev/null
+/*
+ * 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
+ */
+
+/**
+ * The module implements the logic when creating a I2C bus with 7-bit addressing
+ * into a shared abstraction.
+ *
+ * @author Henrik Makitaavola <henrik.makitaavola@gmail.com>
+ */
+#include "I2C.h"
+generic module SharedI2CPacketP()
+{
+ provides interface Resource[uint8_t client];
+ provides interface I2CPacket<TI2CBasicAddr>[uint8_t client];
+ uses interface Resource as SubResource[uint8_t];
+ uses interface I2CPacket<TI2CBasicAddr> as SubPacket;
+}
+implementation
+{
+ enum
+ {
+ NO_CLIENT = 0xff
+ };
+
+ uint8_t currentClient = NO_CLIENT;
+
+ async command error_t Resource.request[uint8_t id]()
+ {
+ return call SubResource.request[id]();
+ }
+
+ async command error_t Resource.immediateRequest[uint8_t id]()
+ {
+ error_t rval = call SubResource.immediateRequest[id]();
+ if (rval == SUCCESS)
+ {
+ atomic currentClient = id;
+ }
+ return rval;
+ }
+
+ event void SubResource.granted[uint8_t id]()
+ {
+ atomic currentClient = id;
+ signal Resource.granted[id]();
+ }
+
+ async command error_t Resource.release[uint8_t id]()
+ {
+ return call SubResource.release[id]();
+ }
+
+ async command bool Resource.isOwner[uint8_t id]()
+ {
+ return call SubResource.isOwner[id]();
+ }
+
+ async command error_t I2CPacket.write[uint8_t id](i2c_flags_t flags,
+ uint16_t addr,
+ uint8_t len,
+ uint8_t* data)
+ {
+ atomic
+ {
+ if (currentClient != id)
+ {
+ return FAIL;
+ }
+ }
+ return call SubPacket.write(flags, addr, len, data);
+ }
+
+ async command error_t I2CPacket.read[uint8_t id](i2c_flags_t flags,
+ uint16_t addr,
+ uint8_t len,
+ uint8_t* data)
+ {
+ atomic
+ {
+ if (currentClient != id)
+ {
+ return FAIL;
+ }
+ }
+ return call SubPacket.read(flags, addr, len, data);
+ }
+
+ default event void Resource.granted[uint8_t id]() {}
+
+ async event void SubPacket.readDone(
+ error_t error, uint16_t addr, uint8_t length, uint8_t* data)
+ {
+ signal I2CPacket.readDone[currentClient](error, addr, length, data);
+ }
+
+ async event void SubPacket.writeDone(
+ error_t error, uint16_t addr, uint8_t length, uint8_t* data)
+ {
+ signal I2CPacket.writeDone[currentClient]( error, addr, length, data);
+ }
+
+ default async event void I2CPacket.readDone[uint8_t id](
+ error_t error, uint16_t addr, uint8_t length, uint8_t* data) { }
+
+ default async event void I2CPacket.writeDone[uint8_t id](
+ error_t error, uint16_t addr, uint8_t length, uint8_t* data) { }
+
+}
projects / tinyos-2.x.git / blobdiff