Kernel changes:

[freertos] / FreeRTOS / Demo / CORTEX_M7_SAMV71_Xplained / libchip_samv7 / source / timetick.c

diff --git a/FreeRTOS/Demo/CORTEX_M7_SAMV71_Xplained/libchip_samv7/source/timetick.c b/FreeRTOS/Demo/CORTEX_M7_SAMV71_Xplained/libchip_samv7/source/timetick.c
new file mode 100644 (file)
index 0000000..c2d201e
--- /dev/null
+++ b/FreeRTOS/Demo/CORTEX_M7_SAMV71_Xplained/libchip_samv7/source/timetick.c
@@ -0,0 +1,148 @@
+/* ----------------------------------------------------------------------------\r
+ *         SAM Software Package License \r
+ * ----------------------------------------------------------------------------\r
+ * Copyright (c) 2011, Atmel Corporation\r
+ *\r
+ * All rights reserved.\r
+ *\r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions are met:\r
+ *\r
+ * - Redistributions of source code must retain the above copyright notice,\r
+ * this list of conditions and the disclaimer below.\r
+ *\r
+ * Atmel's name may not be used to endorse or promote products derived from\r
+ * this software without specific prior written permission.\r
+ *\r
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR\r
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\r
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE\r
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,\r
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\r
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,\r
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\r
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\r
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,\r
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
+ * ----------------------------------------------------------------------------\r
+ */\r
+\r
+/**\r
+ *  \file\r
+ *  Implement simple PIT usage as system tick.\r
+ */\r
+\r
+/*----------------------------------------------------------------------------\r
+ *         Headers\r
+ *----------------------------------------------------------------------------*/\r
+\r
+#include "chip.h"\r
+\r
+/*----------------------------------------------------------------------------\r
+ *         Local variables\r
+ *----------------------------------------------------------------------------*/\r
+\r
+/** Tick Counter united by ms */\r
+static volatile uint32_t _dwTickCount = 0 ;\r
+\r
+/*----------------------------------------------------------------------------\r
+ *         Exported Functions\r
+ *----------------------------------------------------------------------------*/\r
+\r
+\r
+/**\r
+ *  \brief Handler for Sytem Tick interrupt.\r
+ *\r
+ *  Process System Tick Event\r
+ *  Increments the timestamp counter.\r
+ */\r
+void SysTick_Handler( void )\r
+{\r
+    _dwTickCount ++;  \r
+}\r
+\r
+/**\r
+ *  \brief Handler for Sytem Tick interrupt.\r
+ */\r
+extern void TimeTick_Increment( uint32_t dwInc )\r
+{\r
+    _dwTickCount += dwInc;\r
+}\r
+\r
+/**\r
+ *  \brief Configures the PIT & reset tickCount.\r
+ *  Systick interrupt handler will generates 1ms interrupt and increase a\r
+ *  tickCount.\r
+ *  \note IRQ handler must be configured before invoking this function.\r
+ *  \note PIT is enabled automatically in this function.\r
+ *  \param new_mck  Current master clock.\r
+ */\r
+extern uint32_t TimeTick_Configure( uint32_t new_mck )\r
+{\r
+    _dwTickCount = 0 ;\r
+    /* Configure systick for 1 ms. */\r
+    printf( "Configure system tick to get 1ms tick period.\n\r" ) ;\r
+    if ( SysTick_Config( new_mck ) )\r
+    {\r
+        TRACE_ERROR("Systick configuration error\n\r" ) ;\r
+        return 1;\r
+    }\r
+    return 0;\r
+}\r
+\r
+/**\r
+ * Get Delayed number of tick\r
+ * \param startTick Start tick point.\r
+ * \param endTick   End tick point.\r
+ */\r
+extern uint32_t GetDelayInTicks(uint32_t startTick, uint32_t endTick)\r
+{\r
+    if (endTick >= startTick) return (endTick - startTick);\r
+    return (endTick + (0xFFFFFFFF - startTick) + 1);\r
+}\r
+\r
+/**\r
+ *  \brief Get current Tick Count, in ms.\r
+ */\r
+extern uint32_t GetTickCount( void )\r
+{\r
+    return _dwTickCount ;\r
+}\r
+\r
+/**\r
+ *  \brief Sync Wait for several ms\r
+ */\r
+extern void Wait( volatile uint32_t dwMs )\r
+{\r
+    uint32_t dwStart ;\r
+    uint32_t dwCurrent ;\r
+\r
+    dwStart = _dwTickCount ;\r
+    do\r
+    {\r
+        dwCurrent = _dwTickCount ;\r
+    } while ( dwCurrent - dwStart < dwMs ) ;\r
+}\r
+\r
+/**\r
+ *  \brief Sync Sleep for several ms\r
+ */\r
+extern void Sleep( volatile uint32_t dwMs )\r
+{\r
+    uint32_t dwStart ;\r
+    uint32_t dwCurrent ;\r
+    __ASM("CPSIE   I");\r
+    dwStart = _dwTickCount ;\r
+\r
+    do\r
+    {\r
+        dwCurrent = _dwTickCount ;\r
+\r
+        if ( dwCurrent - dwStart > dwMs )\r
+        {\r
+            break ;\r
+        }\r
+        __ASM("WFI");\r
+    } while( 1 ) ;\r
+}\r
+\r