--- /dev/null
+/*\r
+ FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.\r
+\r
+ ***************************************************************************\r
+ * *\r
+ * If you are: *\r
+ * *\r
+ * + New to FreeRTOS, *\r
+ * + Wanting to learn FreeRTOS or multitasking in general quickly *\r
+ * + Looking for basic training, *\r
+ * + Wanting to improve your FreeRTOS skills and productivity *\r
+ * *\r
+ * then take a look at the FreeRTOS books - available as PDF or paperback *\r
+ * *\r
+ * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *\r
+ * http://www.FreeRTOS.org/Documentation *\r
+ * *\r
+ * A pdf reference manual is also available. Both are usually delivered *\r
+ * to your inbox within 20 minutes to two hours when purchased between 8am *\r
+ * and 8pm GMT (although please allow up to 24 hours in case of *\r
+ * exceptional circumstances). Thank you for your support! *\r
+ * *\r
+ ***************************************************************************\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify it under\r
+ the terms of the GNU General Public License (version 2) as published by the\r
+ Free Software Foundation AND MODIFIED BY the FreeRTOS exception.\r
+ ***NOTE*** The exception to the GPL is included to allow you to distribute\r
+ a combined work that includes FreeRTOS without being obliged to provide the\r
+ source code for proprietary components outside of the FreeRTOS kernel.\r
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT\r
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or\r
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for\r
+ more details. You should have received a copy of the GNU General Public\r
+ License and the FreeRTOS license exception along with FreeRTOS; if not it\r
+ can be viewed here: http://www.freertos.org/a00114.html and also obtained\r
+ by writing to Richard Barry, contact details for whom are available on the\r
+ FreeRTOS WEB site.\r
+\r
+ 1 tab == 4 spaces!\r
+\r
+ http://www.FreeRTOS.org - Documentation, latest information, license and\r
+ contact details.\r
+\r
+ http://www.SafeRTOS.com - A version that is certified for use in safety\r
+ critical systems.\r
+\r
+ http://www.OpenRTOS.com - Commercial support, development, porting,\r
+ licensing and training services.\r
+*/\r
+\r
+/* Scheduler includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+\r
+/*-----------------------------------------------------------\r
+ * Implementation of functions defined in portable.h for the MSP430X port.\r
+ *----------------------------------------------------------*/\r
+\r
+/* Constants required for hardware setup. The tick ISR runs off the ACLK,\r
+not the MCLK. */\r
+#define portACLK_FREQUENCY_HZ ( ( portTickType ) 32768 )\r
+#define portINITIAL_CRITICAL_NESTING ( ( unsigned short ) 10 )\r
+#define portFLAGS_INT_ENABLED ( ( portSTACK_TYPE ) 0x08 )\r
+\r
+/* We require the address of the pxCurrentTCB variable, but don't want to know\r
+any details of its type. */\r
+typedef void tskTCB;\r
+extern volatile tskTCB * volatile pxCurrentTCB;\r
+\r
+/* Each task maintains a count of the critical section nesting depth. Each\r
+time a critical section is entered the count is incremented. Each time a\r
+critical section is exited the count is decremented - with interrupts only\r
+being re-enabled if the count is zero.\r
+\r
+usCriticalNesting will get set to zero when the scheduler starts, but must\r
+not be initialised to zero as this will cause problems during the startup\r
+sequence. */\r
+volatile unsigned short usCriticalNesting = portINITIAL_CRITICAL_NESTING;\r
+/*-----------------------------------------------------------*/\r
+\r
+\r
+/*\r
+ * Sets up the periodic ISR used for the RTOS tick. This uses timer 0, but\r
+ * could have alternatively used the watchdog timer or timer 1.\r
+ */\r
+void vPortSetupTimerInterrupt( void );\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * Initialise the stack of a task to look exactly as if a call to\r
+ * portSAVE_CONTEXT had been called.\r
+ *\r
+ * See the header file portable.h.\r
+ */\r
+portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )\r
+{\r
+unsigned short *pusTopOfStack;\r
+\r
+ /*\r
+ Place a few bytes of known values on the bottom of the stack.\r
+ This is just useful for debugging and can be included if required.\r
+\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x1111;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x2222;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x3333;\r
+ pxTopOfStack--;\r
+ */\r
+\r
+ *pxTopOfStack = ( portSTACK_TYPE ) pxCode;\r
+ pusTopOfStack = ( unsigned short * ) pxTopOfStack;\r
+ pusTopOfStack--;\r
+ *pusTopOfStack = portFLAGS_INT_ENABLED;\r
+ pusTopOfStack -= 2;\r
+ pxTopOfStack = ( portSTACK_TYPE * ) pusTopOfStack;\r
+\r
+ /* Next the general purpose registers. */\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xffffff;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xeeeeee;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xdddddd;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) pvParameters;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xbbbbbb;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xaaaaaa;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x999999;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x888888;\r
+ pxTopOfStack--; \r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x555555;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x666666;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x555555;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x444444;\r
+ pxTopOfStack--;\r
+\r
+ /* A variable is used to keep track of the critical section nesting.\r
+ This variable has to be stored as part of the task context and is\r
+ initially set to zero. */\r
+ *pxTopOfStack = ( portSTACK_TYPE ) portNO_CRITICAL_SECTION_NESTING; \r
+\r
+ /* Return a pointer to the top of the stack we have generated so this can\r
+ be stored in the task control block for the task. */\r
+ return pxTopOfStack;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortEndScheduler( void )\r
+{\r
+ /* It is unlikely that the MSP430 port will get stopped. If required simply\r
+ disable the tick interrupt here. */\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * Hardware initialisation to generate the RTOS tick.\r
+ */\r
+void vPortSetupTimerInterrupt( void )\r
+{\r
+ vApplicationSetupTimerInterrupt();\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+#pragma vector=configTICK_INTERRUPT_VECTOR\r
+interrupt void vTickISREntry( void )\r
+{\r
+extern void vPortTickISR( void );\r
+\r
+ #if configUSE_PREEMPTION == 1\r
+ extern void vPortPreemptiveTickISR( void );\r
+ vPortPreemptiveTickISR();\r
+ #else\r
+ extern void vPortCooperativeTickISR( void );\r
+ vPortCooperativeTickISR();\r
+ #endif\r
+}\r
+\r
+ \r
--- /dev/null
+;\r
+; FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.\r
+;\r
+; ***************************************************************************\r
+; * *\r
+; * If you are: *\r
+; * *\r
+; * + New to FreeRTOS, *\r
+; * + Wanting to learn FreeRTOS or multitasking in general quickly *\r
+; * + Looking for basic training, *\r
+; * + Wanting to improve your FreeRTOS skills and productivity *\r
+; * *\r
+; * then take a look at the FreeRTOS books - available as PDF or paperback *\r
+; * *\r
+; * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *\r
+; * http://www.FreeRTOS.org/Documentation *\r
+; * *\r
+; * A pdf reference manual is also available. Both are usually delivered *\r
+; * to your inbox within 20 minutes to two hours when purchased between 8am *\r
+; * and 8pm GMT (although please allow up to 24 hours in case of *\r
+; * exceptional circumstances). Thank you for your support! *\r
+; * *\r
+; ***************************************************************************\r
+;\r
+; This file is part of the FreeRTOS distribution.\r
+;\r
+; FreeRTOS is free software; you can redistribute it and/or modify it under\r
+; the terms of the GNU General Public License (version 2) as published by the\r
+; Free Software Foundation AND MODIFIED BY the FreeRTOS exception.\r
+; ***NOTE*** The exception to the GPL is included to allow you to distribute\r
+; a combined work that includes FreeRTOS without being obliged to provide the\r
+; source code for proprietary components outside of the FreeRTOS kernel.\r
+; FreeRTOS is distributed in the hope that it will be useful, but WITHOUT\r
+; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or\r
+; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for\r
+; more details. You should have received a copy of the GNU General Public\r
+; License and the FreeRTOS license exception along with FreeRTOS; if not it\r
+; can be viewed here: http://www.freertos.org/a00114.html and also obtained\r
+; by writing to Richard Barry, contact details for whom are available on the\r
+; FreeRTOS WEB site.\r
+;\r
+; 1 tab == 4 spaces!\r
+;\r
+; http://www.FreeRTOS.org - Documentation, latest information, license and\r
+; contact details.\r
+;\r
+; http://www.SafeRTOS.com - A version that is certified for use in safety\r
+; critical systems.\r
+;\r
+; http://www.OpenRTOS.com - Commercial support, development, porting,\r
+; licensing and training services.\r
+\r
+; * The definition of the "register test" tasks, as described at the top of\r
+; * main.c\r
+\r
+ .global vTaskIncrementTick\r
+ .global vTaskSwitchContext\r
+ .global vPortSetupTimerInterrupt\r
+ .global pxCurrentTCB\r
+ .global usCriticalNesting\r
+\r
+ .def vPortPreemptiveTickISR\r
+ .def vPortCooperativeTickISR\r
+ .def vPortYield\r
+ .def xPortStartScheduler\r
+\r
+;-----------------------------------------------------------\r
+\r
+portSAVE_CONTEXT .macro\r
+\r
+ ;Save the remaining registers.\r
+ pushm.a #12, r15\r
+ movx.w &usCriticalNesting, r14\r
+ pushx.a r14\r
+ movx.a &pxCurrentTCB, r12\r
+ movx.a sp, 0( r12 )\r
+ .endm\r
+;-----------------------------------------------------------\r
+ \r
+portRESTORE_CONTEXT .macro\r
+\r
+ movx.a &pxCurrentTCB, r12\r
+ movx.a @r12, sp\r
+ popx.a r15\r
+ movx.w r15, &usCriticalNesting\r
+ popm.a #12, r15\r
+ \r
+ ;The last thing on the stack will be the status register.\r
+ ;Ensure the power down bits are clear ready for the next\r
+ ;time this power down register is popped from the stack.\r
+ bic.w #0xf0, 0( sp )\r
+ \r
+ pop.w sr\r
+ reta\r
+ .endm\r
+;-----------------------------------------------------------\r
+\r
+;*\r
+;* The RTOS tick ISR.\r
+;*\r
+;* If the cooperative scheduler is in use this simply increments the tick\r
+;* count.\r
+;*\r
+;* If the preemptive scheduler is in use a context switch can also occur.\r
+;*/\r
+ \r
+ .text\r
+ \r
+vPortPreemptiveTickISR:\r
+ \r
+ ; The sr is not saved in portSAVE_CONTEXT() because vPortYield() needs\r
+ ;to save it manually before it gets modified (interrupts get disabled).\r
+ push.w sr\r
+ portSAVE_CONTEXT\r
+ \r
+ calla #vTaskIncrementTick\r
+ calla #vTaskSwitchContext\r
+ \r
+ portRESTORE_CONTEXT\r
+;-----------------------------------------------------------\r
+\r
+vPortCooperativeTickISR:\r
+ \r
+ ; The sr is not saved in portSAVE_CONTEXT() because vPortYield() needs\r
+ ;to save it manually before it gets modified (interrupts get disabled).\r
+ push.w sr\r
+ portSAVE_CONTEXT\r
+ \r
+ calla #vTaskIncrementTick\r
+ calla #vTaskSwitchContext\r
+ \r
+ portRESTORE_CONTEXT\r
+;-----------------------------------------------------------\r
+\r
+;*\r
+;* Manual context switch called by the portYIELD() macro.\r
+;*/\r
+vPortYield:\r
+\r
+ ; The sr needs saving before it is modified.\r
+ push.w sr\r
+ \r
+ ; Now the SR is stacked we can disable interrupts.\r
+ dint \r
+ nop\r
+ \r
+ ; Save the context of the current task.\r
+ portSAVE_CONTEXT \r
+\r
+ ; Select the next task to run.\r
+ calla #vTaskSwitchContext \r
+\r
+ ; Restore the context of the new task.\r
+ portRESTORE_CONTEXT\r
+;-----------------------------------------------------------\r
+\r
+\r
+;*\r
+;* Start off the scheduler by initialising the RTOS tick timer, then restoring\r
+;* the context of the first task.\r
+;*\r
+xPortStartScheduler:\r
+\r
+ ; Setup the hardware to generate the tick. Interrupts are disabled\r
+ ; when this function is called.\r
+ calla #vPortSetupTimerInterrupt\r
+\r
+ ; Restore the context of the first task that is going to run.\r
+ portRESTORE_CONTEXT\r
+;-----------------------------------------------------------\r
+ \r
+ .end\r
+ \r
--- /dev/null
+/*\r
+ FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.\r
+\r
+ ***************************************************************************\r
+ * *\r
+ * If you are: *\r
+ * *\r
+ * + New to FreeRTOS, *\r
+ * + Wanting to learn FreeRTOS or multitasking in general quickly *\r
+ * + Looking for basic training, *\r
+ * + Wanting to improve your FreeRTOS skills and productivity *\r
+ * *\r
+ * then take a look at the FreeRTOS books - available as PDF or paperback *\r
+ * *\r
+ * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *\r
+ * http://www.FreeRTOS.org/Documentation *\r
+ * *\r
+ * A pdf reference manual is also available. Both are usually delivered *\r
+ * to your inbox within 20 minutes to two hours when purchased between 8am *\r
+ * and 8pm GMT (although please allow up to 24 hours in case of *\r
+ * exceptional circumstances). Thank you for your support! *\r
+ * *\r
+ ***************************************************************************\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify it under\r
+ the terms of the GNU General Public License (version 2) as published by the\r
+ Free Software Foundation AND MODIFIED BY the FreeRTOS exception.\r
+ ***NOTE*** The exception to the GPL is included to allow you to distribute\r
+ a combined work that includes FreeRTOS without being obliged to provide the\r
+ source code for proprietary components outside of the FreeRTOS kernel.\r
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT\r
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or\r
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for\r
+ more details. You should have received a copy of the GNU General Public\r
+ License and the FreeRTOS license exception along with FreeRTOS; if not it\r
+ can be viewed here: http://www.freertos.org/a00114.html and also obtained\r
+ by writing to Richard Barry, contact details for whom are available on the\r
+ FreeRTOS WEB site.\r
+\r
+ 1 tab == 4 spaces!\r
+\r
+ http://www.FreeRTOS.org - Documentation, latest information, license and\r
+ contact details.\r
+\r
+ http://www.SafeRTOS.com - A version that is certified for use in safety\r
+ critical systems.\r
+\r
+ http://www.OpenRTOS.com - Commercial support, development, porting,\r
+ licensing and training services.\r
+*/\r
+\r
+#ifndef PORTMACRO_H\r
+#define PORTMACRO_H\r
+\r
+/*-----------------------------------------------------------\r
+ * Port specific definitions.\r
+ *\r
+ * The settings in this file configure FreeRTOS correctly for the\r
+ * given hardware and compiler.\r
+ *\r
+ * These settings should not be altered.\r
+ *-----------------------------------------------------------\r
+ */\r
+\r
+/* Hardware includes. */\r
+#include "msp430.h"\r
+\r
+/* Type definitions. */\r
+#define portCHAR char\r
+#define portFLOAT float\r
+#define portDOUBLE double\r
+#define portLONG long\r
+#define portSHORT int\r
+#define portSTACK_TYPE unsigned portLONG\r
+#define portBASE_TYPE portSHORT\r
+\r
+#if( configUSE_16_BIT_TICKS == 1 )\r
+ typedef unsigned portSHORT portTickType;\r
+ #define portMAX_DELAY ( portTickType ) 0xffff\r
+#else\r
+ typedef unsigned portLONG portTickType;\r
+ #define portMAX_DELAY ( portTickType ) 0xffffffff\r
+#endif\r
+\r
+/*-----------------------------------------------------------*/ \r
+\r
+/* Interrupt control macros. */\r
+#define portDISABLE_INTERRUPTS() _disable_interrupt()\r
+#define portENABLE_INTERRUPTS() _enable_interrupt()\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Critical section control macros. */\r
+#define portNO_CRITICAL_SECTION_NESTING ( ( unsigned portSHORT ) 0 )\r
+\r
+#define portENTER_CRITICAL() \\r
+{ \\r
+extern volatile unsigned short usCriticalNesting; \\r
+ \\r
+ portDISABLE_INTERRUPTS(); \\r
+ \\r
+ /* Now interrupts are disabled usCriticalNesting can be accessed */ \\r
+ /* directly. Increment ulCriticalNesting to keep a count of how many */ \\r
+ /* times portENTER_CRITICAL() has been called. */ \\r
+ usCriticalNesting++; \\r
+}\r
+\r
+#define portEXIT_CRITICAL() \\r
+{ \\r
+extern volatile unsigned short usCriticalNesting; \\r
+ \\r
+ if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING ) \\r
+ { \\r
+ /* Decrement the nesting count as we are leaving a critical section. */ \\r
+ usCriticalNesting--; \\r
+ \\r
+ /* If the nesting level has reached zero then interrupts should be */ \\r
+ /* re-enabled. */ \\r
+ if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING ) \\r
+ { \\r
+ portENABLE_INTERRUPTS(); \\r
+ } \\r
+ } \\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task utilities. */\r
+\r
+/*\r
+ * Manual context switch called by portYIELD or taskYIELD.\r
+ */\r
+extern void vPortYield( void );\r
+#define portYIELD() vPortYield()\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Hardware specifics. */\r
+#define portBYTE_ALIGNMENT 4\r
+#define portSTACK_GROWTH ( -1 )\r
+#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ ) \r
+#define portNOP() \r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task function macros as described on the FreeRTOS.org WEB site. */\r
+#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+\r
+extern void vTaskSwitchContext( void );\r
+#define portYIELD_FROM_ISR( x ) if( x ) vPortYield()\r
+ \r
+void vApplicationSetupTimerInterrupt( void );\r
+\r
+#endif /* PORTMACRO_H */\r
+\r
projects / freertos / commitdiff