Merge branch 'master' of ../wifishield

1 files changed, 309 insertions, 0 deletions

diff --git a/firmwares/wifishield/wifiHD/src/SOFTWARE_FRAMEWORK/DRIVERS/CPU/CYCLE_COUNTER/cycle_counter.h b/firmwares/wifishield/wifiHD/src/SOFTWARE_FRAMEWORK/DRIVERS/CPU/CYCLE_COUNTER/cycle_counter.h
new file mode 100644
index 0000000..d0c51df
--- /dev/null
+++ b/firmwares/wifishield/wifiHD/src/SOFTWARE_FRAMEWORK/DRIVERS/CPU/CYCLE_COUNTER/cycle_counter.h
@@ -0,0 +1,309 @@
+/* This header file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */
+
+/*This file has been prepared for Doxygen automatic documentation generation.*/
+/*! \file *********************************************************************
+ *
+ * \brief Cycle counter driver.
+ *
+ * - Compiler:           IAR EWAVR32 and GNU GCC for AVR32
+ * - Supported devices:  All AVR32UC devices.
+ * - AppNote:
+ *
+ * \author               Atmel Corporation: http://www.atmel.com \n
+ *                       Support and FAQ: http://support.atmel.no/
+ *
+ *****************************************************************************/
+
+/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
+ *
+ * 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. The name of Atmel may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an Atmel
+ * AVR product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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 _CYCLE_COUNTER_H_
+#define _CYCLE_COUNTER_H_
+
+#include "compiler.h"
+
+
+//! Structure holding private information, automatically initialized by the
+//! cpu_set_timeout() function.
+typedef struct
+{
+  //! The cycle count at the begining of the timeout.
+  unsigned long delay_start_cycle;
+
+  //! The cycle count at the end of the timeout.
+  unsigned long delay_end_cycle;
+
+  //! Enable/disable the timout detection
+  unsigned char timer_state;
+  #define CPU_TIMER_STATE_STARTED 0
+  #define CPU_TIMER_STATE_REACHED 1
+  #define CPU_TIMER_STATE_STOPPED 2
+} t_cpu_time;
+
+
+/*!
+ * \brief Convert milli-seconds into CPU cycles.
+ *
+ * \param  ms:      Number of millisecond.
+ * \param  fcpu_hz: CPU frequency in Hz.
+ *
+ * \return the converted number of CPU cycles.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ U32 cpu_ms_2_cy(unsigned long ms, unsigned long fcpu_hz)
+{
+  return ((unsigned long long)ms * fcpu_hz + 999) / 1000;
+}
+
+
+/*!
+ * \brief Convert micro-seconds into CPU cycles.
+ *
+ * \param  us:      Number of microsecond.
+ * \param  fcpu_hz: CPU frequency in Hz.
+ *
+ * \return the converted number of CPU cycles.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ U32 cpu_us_2_cy(unsigned long us, unsigned long fcpu_hz)
+{
+  return ((unsigned long long)us * fcpu_hz + 999999) / 1000000;
+}
+
+
+/*!
+ * \brief Convert CPU cycles into milli-seconds.
+ *
+ * \param  cy:      Number of CPU cycles.
+ * \param  fcpu_hz: CPU frequency in Hz.
+ *
+ * \return the converted number of milli-second.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ U32 cpu_cy_2_ms(unsigned long cy, unsigned long fcpu_hz)
+{
+  return ((unsigned long long)cy * 1000 + fcpu_hz-1) / fcpu_hz;
+}
+
+
+/*!
+ * \brief Convert CPU cycles into micro-seconds.
+ *
+ * \param  cy:      Number of CPU cycles.
+ * \param  fcpu_hz: CPU frequency in Hz.
+ *
+ * \return the converted number of micro-second.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ U32 cpu_cy_2_us(unsigned long cy, unsigned long fcpu_hz)
+{
+  return ((unsigned long long)cy * 1000000 + fcpu_hz-1) / fcpu_hz;
+}
+
+
+/*!
+ * \brief Set a timer variable.
+ *
+ * Ex:  t_cpu_time timer;
+ *      cpu_set_timeout( cpu_ms_2_cy(10, FOSC0), &timer ); // timeout in 10 ms
+ *      if( cpu_is_timeout(&timer) )
+ *         cpu_stop_timeout(&timer);
+ *         ../..
+ *
+ * \param  delay:   (input) delay in CPU cycles before timeout.
+ * \param  cpu_time: (output) internal information used by the timer API.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ void cpu_set_timeout(unsigned long delay, t_cpu_time *cpu_time)
+{
+  cpu_time->delay_start_cycle = Get_system_register(AVR32_COUNT);
+  cpu_time->delay_end_cycle   = cpu_time->delay_start_cycle + delay;
+  cpu_time->timer_state       = CPU_TIMER_STATE_STARTED;
+}
+
+
+/*!
+ * \brief Test if a timer variable reached its timeout.
+ *
+ * Once the timeout is reached, the function will always return TRUE,
+ * until the cpu_stop_timeout() function is called.
+ *
+ * Ex:  t_cpu_time timer;
+ *      cpu_set_timeout( 10, FOSC0, &timer ); // timeout in 10 ms
+ *      if( cpu_is_timeout(&timer) )
+ *         cpu_stop_timeout(&timer);
+ *         ../..
+ *
+ * \param  cpu_time:   (input) internal information used by the timer API.
+ *
+ * \return TRUE if timeout occured, otherwise FALSE.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ unsigned long cpu_is_timeout(t_cpu_time *cpu_time)
+{
+  unsigned long current_cycle_count = Get_system_register(AVR32_COUNT);
+
+  if( cpu_time->timer_state==CPU_TIMER_STATE_STOPPED )
+    return FALSE;
+
+  // Test if the timeout as already occured.
+  else if (cpu_time->timer_state == CPU_TIMER_STATE_REACHED)
+    return TRUE;
+
+  // If the ending cycle count of this timeout is wrapped, ...
+  else if (cpu_time->delay_start_cycle > cpu_time->delay_end_cycle)
+  {
+    if (current_cycle_count < cpu_time->delay_start_cycle && current_cycle_count > cpu_time->delay_end_cycle)
+    {
+      cpu_time->timer_state = CPU_TIMER_STATE_REACHED;
+      return TRUE;
+    }
+    return FALSE;
+  }
+  else
+  {
+    if (current_cycle_count < cpu_time->delay_start_cycle || current_cycle_count > cpu_time->delay_end_cycle)
+    {
+      cpu_time->timer_state = CPU_TIMER_STATE_REACHED;
+      return TRUE;
+    }
+    return FALSE;
+  }
+}
+
+
+/*!
+ * \brief Stop a timeout detection.
+ *
+ * Ex:  t_cpu_time timer;
+ *      cpu_set_timeout( 10, FOSC0, &timer ); // timeout in 10 ms
+ *      if( cpu_is_timeout(&timer) )
+ *         cpu_stop_timeout(&timer);
+ *         ../..
+ *
+ * \param  cpu_time:   (input) internal information used by the timer API.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ void cpu_stop_timeout(t_cpu_time *cpu_time)
+{
+  cpu_time->timer_state = CPU_TIMER_STATE_STOPPED;
+}
+
+
+/*!
+ * \brief Test if a timer is stopped.
+ *
+ * \param  cpu_time:   (input) internal information used by the timer API.
+ *
+ * \return TRUE if timer is stopped, otherwise FALSE.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ unsigned long cpu_is_timer_stopped(t_cpu_time *cpu_time)
+{
+
+  if( cpu_time->timer_state==CPU_TIMER_STATE_STOPPED )
+    return TRUE;
+  else
+    return FALSE;
+}
+
+
+/*!
+ * \brief Waits during at least the specified delay (in millisecond) before returning.
+ *
+ * \param  delay:   Number of millisecond to wait.
+ * \param  fcpu_hz: CPU frequency in Hz.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ void cpu_delay_ms(unsigned long delay, unsigned long fcpu_hz)
+{
+  t_cpu_time timer;
+  cpu_set_timeout( cpu_ms_2_cy(delay, fcpu_hz), &timer);
+  while( !cpu_is_timeout(&timer) );
+}
+
+/*!
+ * \brief Waits during at least the specified delay (in microsecond) before returning.
+ *
+ * \param  delay:   Number of microsecond to wait.
+ * \param  fcpu_hz: CPU frequency in Hz.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ void cpu_delay_us(unsigned long delay, unsigned long fcpu_hz)
+{
+  t_cpu_time timer;
+  cpu_set_timeout( cpu_us_2_cy(delay, fcpu_hz), &timer);
+  while( !cpu_is_timeout(&timer) );
+}
+
+/*!
+ * \brief Waits during at least the specified delay (in CPU cycles) before returning.
+ *
+ * \param  delay:   Number of CPU cycles to wait.
+ */
+#if (defined __GNUC__)
+__attribute__((__always_inline__))
+#endif
+extern __inline__ void cpu_delay_cy(unsigned long delay)
+{
+  t_cpu_time timer;
+  cpu_set_timeout( delay, &timer);
+  while( !cpu_is_timeout(&timer) );
+}
+
+
+#define Get_sys_count()     ( Get_system_register(AVR32_COUNT)        )
+#define Set_sys_count(x)    ( Set_system_register(AVR32_COUNT,   (x)) )
+#define Get_sys_compare()   ( Get_system_register(AVR32_COMPARE)      )
+#define Set_sys_compare(x)  ( Set_system_register(AVR32_COMPARE, (x)) )
+
+
+#endif // _CYCLE_COUNTER_H_