Add IAR MSP430 port layer.

2025-08-19 09:38:32 -04:00 · 2008-10-26 14:56:06 +00:00 · 2008-10-26 14:56:06 +00:00 · 48a34c5fd1
commit 48a34c5fd1
parent 151882a872
4 changed files with 578 additions and 0 deletions
--- a/Source/portable/IAR/MSP430/portext.s43
+++ b/Source/portable/IAR/MSP430/portext.s43
@ -0,0 +1,128 @@
+/*
+	FreeRTOS.org V5.1.0 - Copyright (C) 2003-2008 Richard Barry.
+
+	This file is part of the FreeRTOS.org distribution.
+
+	FreeRTOS.org is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	FreeRTOS.org is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with FreeRTOS.org; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+	A special exception to the GPL can be applied should you wish to distribute
+	a combined work that includes FreeRTOS.org, without being obliged to provide
+	the source code for any proprietary components.  See the licensing section
+	of http://www.FreeRTOS.org for full details of how and when the exception
+	can be applied.
+
+    ***************************************************************************
+    ***************************************************************************
+    *                                                                         *
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+    * and even write all or part of your application on your behalf.          *
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+    *                                                                         *
+    ***************************************************************************
+    ***************************************************************************
+
+	Please ensure to read the configuration and relevant port sections of the
+	online documentation.
+
+	http://www.FreeRTOS.org - Documentation, latest information, license and
+	contact details.
+
+	http://www.SafeRTOS.com - A version that is certified for use in safety
+	critical systems.
+
+	http://www.OpenRTOS.com - Commercial support, development, porting,
+	licensing and training services.
+*/
+#include "FreeRTOSConfig.h"
+#include "portasm.h"
+
+	IMPORT vTaskIncrementTick
+	IMPORT vTaskSwitchContext
+	IMPORT vPortSetupTimerInterrupt
+
+	EXPORT vTickISR
+	EXPORT vPortYield
+	EXPORT xPortStartScheduler
+	
+	RSEG CODE
+
+/*
+ * The RTOS tick ISR.
+ *
+ * If the cooperative scheduler is in use this simply increments the tick
+ * count.
+ *
+ * If the preemptive scheduler is in use a context switch can also occur.
+ */
+vTickISR:
+	portSAVE_CONTEXT
+				
+	call	#vTaskIncrementTick
+
+	#if configUSE_PREEMPTION == 1
+		call	#vTaskSwitchContext
+	#endif
+		
+	portRESTORE_CONTEXT
+/*-----------------------------------------------------------*/
+
+
+/*
+ * Manual context switch called by the portYIELD() macro.
+ */
+vPortYield:
+
+	/* Mimic an interrupt by pushing the SR. */
+	push	SR			
+
+	/* Now the SR is stacked we can disable interrupts. */
+	dint			
+				
+	/* Save the context of the current task. */
+	portSAVE_CONTEXT			
+
+	/* Switch to the highest priority task that is ready to run. */
+	call	#vTaskSwitchContext		
+
+	/* Restore the context of the new task. */
+	portRESTORE_CONTEXT
+/*-----------------------------------------------------------*/
+
+
+/*
+ * Start off the scheduler by initialising the RTOS tick timer, then restoring
+ * the context of the first task.
+ */
+xPortStartScheduler:
+
+	/* Setup the hardware to generate the tick.  Interrupts are disabled
+	when this function is called. */
+	call	#vPortSetupTimerInterrupt
+
+	/* Restore the context of the first task that is going to run. */
+	portRESTORE_CONTEXT
+/*-----------------------------------------------------------*/
+      		
+
+	/* Install vTickISR as the timer A0 interrupt. */
+	ASEG
+	ORG 0xFFE0 + TIMERA0_VECTOR
+	
+	_vTickISR_: DC16 vTickISR
+	
+
+	END
+