--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section\r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license\r
+ and contact details. Please ensure to read the configuration and relevant\r
+ port sections of the online documentation.\r
+ ***************************************************************************\r
+*/\r
+\r
+\r
+/*-----------------------------------------------------------\r
+ * Implementation of functions defined in portable.h for the Tern EE 186\r
+ * port.\r
+ *----------------------------------------------------------*/\r
+\r
+/* Library includes. */\r
+#include <embedded.h>\r
+#include <ae.h>\r
+\r
+/* Scheduler includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "portasm.h"\r
+\r
+/* The timer increments every four clocks, hence the divide by 4. */\r
+#define portTIMER_COMPARE ( unsigned portSHORT ) ( ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) / ( unsigned portLONG ) 4 )\r
+\r
+/* From the RDC data sheet. */\r
+#define portENABLE_TIMER_AND_INTERRUPT ( unsigned portSHORT ) 0xe001\r
+\r
+/* Interrupt control. */\r
+#define portEIO_REGISTER 0xff22\r
+#define portCLEAR_INTERRUPT 0x0008\r
+\r
+/* Setup the hardware to generate the required tick frequency. */\r
+static void prvSetupTimerInterrupt( void );\r
+\r
+/* The ISR used depends on whether the preemptive or cooperative scheduler\r
+is being used. */\r
+#if( configUSE_PREEMPTION == 1 )\r
+ /* Tick service routine used by the scheduler when preemptive scheduling is\r
+ being used. */\r
+ static void __interrupt __far prvPreemptiveTick( void );\r
+#else\r
+ /* Tick service routine used by the scheduler when cooperative scheduling is\r
+ being used. */\r
+ static void __interrupt __far prvNonPreemptiveTick( void );\r
+#endif\r
+\r
+/* Trap routine used by taskYIELD() to manually cause a context switch. */\r
+static void __interrupt __far prvYieldProcessor( void );\r
+\r
+/*-----------------------------------------------------------*/\r
+/* See header file for description. */\r
+portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )\r
+{\r
+portSTACK_TYPE DS_Reg = 0;\r
+\r
+ /* Place a few bytes of known values on the bottom of the stack.\r
+ This is just useful for debugging. */\r
+\r
+ *pxTopOfStack = 0x1111;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = 0x2222;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = 0x3333;\r
+ pxTopOfStack--;\r
+\r
+ /* We are going to start the scheduler using a return from interrupt\r
+ instruction to load the program counter, so first there would be the\r
+ function call with parameters preamble. */\r
+ \r
+ *pxTopOfStack = FP_SEG( pvParameters );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_OFF( pvParameters );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_SEG( pxCode );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_OFF( pxCode );\r
+ pxTopOfStack--;\r
+\r
+ /* Next the status register and interrupt return address. */\r
+ *pxTopOfStack = portINITIAL_SW;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_SEG( pxCode );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_OFF( pxCode );\r
+ pxTopOfStack--;\r
+\r
+ /* The remaining registers would be pushed on the stack by our context\r
+ switch function. These are loaded with values simply to make debugging\r
+ easier. */\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xAAAA; /* AX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xCCCC; /* CX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xEEEE; /* ES */\r
+ pxTopOfStack--;\r
+\r
+ /* We need the true data segment. */\r
+ __asm{ MOV DS_Reg, DS };\r
+\r
+ *pxTopOfStack = DS_Reg; /* DS */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x0123; /* SI */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DI */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BP */\r
+\r
+ return pxTopOfStack;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+portBASE_TYPE xPortStartScheduler( void )\r
+{\r
+ /* This is called with interrupts already disabled. */\r
+\r
+ /* Put our manual switch (yield) function on a known\r
+ vector. */\r
+ setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );\r
+\r
+ /* Setup the tick interrupt. */\r
+ prvSetupTimerInterrupt();\r
+\r
+ /* Kick off the scheduler by setting up the context of the first task. */\r
+ portFIRST_CONTEXT();\r
+\r
+ /* Should not get here! */\r
+ return pdFALSE;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* The ISR used depends on whether the preemptive or cooperative scheduler\r
+is being used. */\r
+#if( configUSE_PREEMPTION == 1 )\r
+ static void __interrupt __far prvPreemptiveTick( void )\r
+ {\r
+ /* Get the scheduler to update the task states following the tick. */\r
+ vTaskIncrementTick();\r
+\r
+ /* Switch in the context of the next task to be run. */\r
+ portSWITCH_CONTEXT();\r
+\r
+ /* Reset interrupt. */\r
+ outport( portEIO_REGISTER, portCLEAR_INTERRUPT );\r
+ }\r
+#else\r
+ static void __interrupt __far prvNonPreemptiveTick( void )\r
+ {\r
+ /* Same as preemptive tick, but the cooperative scheduler is being used\r
+ so we don't have to switch in the context of the next task. */\r
+ vTaskIncrementTick();\r
+ /* Reset interrupt. */\r
+ outport( portEIO_REGISTER, portCLEAR_INTERRUPT );\r
+ }\r
+#endif\r
+/*-----------------------------------------------------------*/\r
+\r
+static void __interrupt __far prvYieldProcessor( void )\r
+{\r
+ /* Switch in the context of the next task to be run. */\r
+ portSWITCH_CONTEXT();\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortEndScheduler( void )\r
+{\r
+ /* Not implemented. */\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvSetupTimerInterrupt( void )\r
+{\r
+const unsigned portSHORT usTimerACompare = portTIMER_COMPARE, usTimerAMode = portENABLE_TIMER_AND_INTERRUPT;\r
+\r
+ #if( configUSE_PREEMPTION == 1 )\r
+ /* Tick service routine used by the scheduler when preemptive scheduling is\r
+ being used. */\r
+ t2_init( usTimerAMode, usTimerACompare, prvPreemptiveTick );\r
+ #else\r
+ /* Tick service routine used by the scheduler when cooperative scheduling is\r
+ being used. */\r
+ t2_init( usTimerAMode, usTimerACompare, prvNonPreemptiveTick );\r
+ #endif\r
+}\r
+\r
+\r
+\r
+\r
+\r
+\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section \r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license \r
+ and contact details. Please ensure to read the configuration and relevant \r
+ port sections of the online documentation.\r
+ ***************************************************************************\r
+*/\r
+\r
+typedef void tskTCB;\r
+extern volatile tskTCB * volatile pxCurrentTCB;\r
+extern void vTaskSwitchContext( void );\r
+\r
+/*\r
+ * Saves the stack pointer for one task into its TCB, calls\r
+ * vTaskSwitchContext() to update the TCB being used, then restores the stack\r
+ * from the new TCB read to run the task.\r
+ */\r
+void portSWITCH_CONTEXT( void );\r
+\r
+/*\r
+ * Load the stack pointer from the TCB of the task which is going to be first\r
+ * to execute. Then force an IRET so the registers and IP are popped off the\r
+ * stack.\r
+ */\r
+void portFIRST_CONTEXT( void );\r
+\r
+#define portSWITCH_CONTEXT() \r
+// asm { mov ax, seg pxCurrentTCB }\r
+// asm { mov ds, ax }\r
+// asm { les bx, pxCurrentTCB } /* Save the stack pointer into the TCB. */\r
+// asm { mov es:0x2[ bx ], ss }\r
+// asm { mov es:[ bx ], sp }\r
+// asm { call far ptr vTaskSwitchContext } /* Perform the switch. */\r
+// asm { mov ax, seg pxCurrentTCB } /* Restore the stack pointer from the TCB. */\r
+// asm { mov ds, ax }\r
+// asm { les bx, dword ptr pxCurrentTCB }\r
+// asm { mov ss, es:[ bx + 2 ] } \r
+// asm { mov sp, es:[ bx ] }\r
+\r
+#define portFIRST_CONTEXT() \\r
+ asm { mov ax, seg pxCurrentTCB } \\r
+ asm { mov ds, ax } \\r
+ asm { les bx, dword ptr pxCurrentTCB } \\r
+ asm { mov ss, es:[ bx + 2 ] } \\r
+ asm { mov sp, es:[ bx ] } \\r
+ asm { pop bx } \\r
+ asm { pop di } \\r
+ asm { pop si } \\r
+ asm { pop ds } \\r
+ asm { pop es } \\r
+ asm { pop dx } \\r
+ asm { pop cx } \\r
+ asm { pop bx } \\r
+ asm { pop ax } \\r
+ asm { iret }\r
+\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section \r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license \r
+ and contact details. Please ensure to read the configuration and relevant \r
+ port sections of the online documentation.\r
+ ***************************************************************************\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
+/* Type definitions. */\r
+#define portCHAR char\r
+#define portFLOAT float\r
+#define portDOUBLE long\r
+#define portLONG long\r
+#define portSHORT int\r
+#define portSTACK_TYPE unsigned portSHORT\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
+/* Critical section handling. */\r
+#define portENTER_CRITICAL() __asm{ pushf } \\r
+ __asm{ cli } \\r
+\r
+#define portEXIT_CRITICAL() __asm{ popf }\r
+\r
+#define portDISABLE_INTERRUPTS() __asm{ cli }\r
+\r
+#define portENABLE_INTERRUPTS() __asm{ sti }\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Hardware specifics. */\r
+#define portNOP() __asm{ nop }\r
+#define portSTACK_GROWTH ( -1 )\r
+#define portSWITCH_INT_NUMBER 0x80\r
+#define portYIELD() __asm{ int portSWITCH_INT_NUMBER } \r
+#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ ) \r
+#define portBYTE_ALIGNMENT 2\r
+#define portINITIAL_SW ( ( portSTACK_TYPE ) 0x0202 ) /* Start the tasks with interrupts enabled. */\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Compiler specifics. */\r
+#define portINPUT_BYTE( xAddr ) inp( xAddr )\r
+#define portOUTPUT_BYTE( xAddr, ucValue ) outp( xAddr, ucValue )\r
+#define portINPUT_WORD( xAddr ) inpw( xAddr )\r
+#define portOUTPUT_WORD( xAddr, usValue ) outpw( xAddr, usValue )\r
+#define inline\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task function macros as described on the FreeRTOS.org WEB site. */\r
+#define portTASK_FUNCTION_PROTO( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )\r
+#define portTASK_FUNCTION( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )\r
+\r
+#endif /* PORTMACRO_H */\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section \r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license \r
+ and contact details. Please ensure to read the configuration and relevant \r
+ port sections of the online documentation.\r
+ ***************************************************************************\r
+*/\r
+\r
+#ifndef PORT_ASM_H\r
+#define PORT_ASM_H\r
+\r
+typedef void tskTCB;\r
+extern volatile tskTCB * volatile pxCurrentTCB;\r
+extern void vTaskSwitchContext( void );\r
+\r
+/*\r
+ * Saves the stack pointer for one task into its TCB, calls\r
+ * vTaskSwitchContext() to update the TCB being used, then restores the stack\r
+ * from the new TCB read to run the task.\r
+ */\r
+void portSWITCH_CONTEXT( void );\r
+\r
+/*\r
+ * Load the stack pointer from the TCB of the task which is going to be first\r
+ * to execute. Then force an IRET so the registers and IP are popped off the\r
+ * stack.\r
+ */\r
+void portFIRST_CONTEXT( void );\r
+\r
+#define portSWITCH_CONTEXT() \\r
+ asm { mov bx, [pxCurrentTCB] } \\r
+ asm { mov word ptr [bx], sp } \\r
+ asm { call far ptr vTaskSwitchContext } \\r
+ asm { mov bx, [pxCurrentTCB] } \\r
+ asm { mov sp, [bx] }\r
+\r
+#define portFIRST_CONTEXT() \\r
+ asm { mov bx, [pxCurrentTCB] } \\r
+ asm { mov sp, [bx] } \\r
+ asm { pop bp } \\r
+ asm { pop di } \\r
+ asm { pop si } \\r
+ asm { pop ds } \\r
+ asm { pop es } \\r
+ asm { pop dx } \\r
+ asm { pop cx } \\r
+ asm { pop bx } \\r
+ asm { pop ax } \\r
+ asm { iret }\r
+\r
+\r
+#endif\r
--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section\r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license\r
+ and contact details. Please ensure to read the configuration and relevant\r
+ port sections of the online documentation.\r
+ ***************************************************************************\r
+*/\r
+\r
+\r
+/*-----------------------------------------------------------\r
+ * Implementation of functions defined in portable.h for the Tern EE 186\r
+ * port.\r
+ *----------------------------------------------------------*/\r
+\r
+/* Library includes. */\r
+#include <embedded.h>\r
+#include <ae.h>\r
+\r
+/* Scheduler includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "portasm.h"\r
+\r
+/* The timer increments every four clocks, hence the divide by 4. */\r
+#define portPRESCALE_VALUE ( 16 )\r
+#define portTIMER_COMPARE ( configCPU_CLOCK_HZ / ( configTICK_RATE_HZ * 4UL ) )\r
+\r
+/* From the RDC data sheet. */\r
+#define portENABLE_TIMER_AND_INTERRUPT ( unsigned portSHORT ) 0xe00b\r
+#define portENABLE_TIMER ( unsigned portSHORT ) 0xC001\r
+\r
+/* Interrupt control. */\r
+#define portEIO_REGISTER 0xff22\r
+#define portCLEAR_INTERRUPT 0x0008\r
+\r
+/* Setup the hardware to generate the required tick frequency. */\r
+static void prvSetupTimerInterrupt( void );\r
+\r
+/* The ISR used depends on whether the preemptive or cooperative scheduler\r
+is being used. */\r
+#if( configUSE_PREEMPTION == 1 )\r
+ /* Tick service routine used by the scheduler when preemptive scheduling is\r
+ being used. */\r
+ static void __interrupt __far prvPreemptiveTick( void );\r
+#else\r
+ /* Tick service routine used by the scheduler when cooperative scheduling is\r
+ being used. */\r
+ static void __interrupt __far prvNonPreemptiveTick( void );\r
+#endif\r
+\r
+/* Trap routine used by taskYIELD() to manually cause a context switch. */\r
+static void __interrupt __far prvYieldProcessor( void );\r
+\r
+/*-----------------------------------------------------------*/\r
+/* See header file for description. */\r
+portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )\r
+{\r
+portSTACK_TYPE DS_Reg = 0;\r
+\r
+ /* We need the true data segment. */\r
+ __asm{ MOV DS_Reg, DS };\r
+\r
+ /* Place a few bytes of known values on the bottom of the stack.\r
+ This is just useful for debugging. */\r
+\r
+ *pxTopOfStack = 0x1111;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = 0x2222;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = 0x3333;\r
+ pxTopOfStack--;\r
+\r
+ /* We are going to start the scheduler using a return from interrupt\r
+ instruction to load the program counter, so first there would be the\r
+ function call with parameters preamble. */\r
+ \r
+ *pxTopOfStack = FP_OFF( pvParameters );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_OFF( pxCode );\r
+ pxTopOfStack--;\r
+\r
+ /* Next the status register and interrupt return address. */\r
+ *pxTopOfStack = portINITIAL_SW;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_SEG( pxCode );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_OFF( pxCode );\r
+ pxTopOfStack--;\r
+\r
+ /* The remaining registers would be pushed on the stack by our context\r
+ switch function. These are loaded with values simply to make debugging\r
+ easier. */\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xAAAA; /* AX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xCCCC; /* CX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xEEEE; /* ES */\r
+ pxTopOfStack--;\r
+\r
+ *pxTopOfStack = DS_Reg; /* DS */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x0123; /* SI */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DI */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BP */\r
+\r
+ return pxTopOfStack;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+portBASE_TYPE xPortStartScheduler( void )\r
+{\r
+ /* This is called with interrupts already disabled. */\r
+\r
+ /* Put our manual switch (yield) function on a known\r
+ vector. */\r
+ setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );\r
+\r
+ /* Setup the tick interrupt. */\r
+ prvSetupTimerInterrupt();\r
+\r
+ /* Kick off the scheduler by setting up the context of the first task. */\r
+ portFIRST_CONTEXT();\r
+\r
+ /* Should not get here! */\r
+ return pdFALSE;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* The ISR used depends on whether the preemptive or cooperative scheduler\r
+is being used. */\r
+#if( configUSE_PREEMPTION == 1 )\r
+ static void __interrupt __far prvPreemptiveTick( void )\r
+ {\r
+ /* Get the scheduler to update the task states following the tick. */\r
+ vTaskIncrementTick();\r
+\r
+ /* Switch in the context of the next task to be run. */\r
+ portEND_SWITCHING_ISR();\r
+\r
+ /* Reset interrupt. */\r
+ outport( portEIO_REGISTER, portCLEAR_INTERRUPT );\r
+ }\r
+#else\r
+ static void __interrupt __far prvNonPreemptiveTick( void )\r
+ {\r
+ /* Same as preemptive tick, but the cooperative scheduler is being used\r
+ so we don't have to switch in the context of the next task. */\r
+ vTaskIncrementTick();\r
+ /* Reset interrupt. */\r
+ outport( portEIO_REGISTER, portCLEAR_INTERRUPT );\r
+ }\r
+#endif\r
+/*-----------------------------------------------------------*/\r
+\r
+static void __interrupt __far prvYieldProcessor( void )\r
+{\r
+ /* Switch in the context of the next task to be run. */\r
+ portEND_SWITCHING_ISR();\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortEndScheduler( void )\r
+{\r
+ /* Not implemented. */\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvSetupTimerInterrupt( void )\r
+{\r
+const unsigned portLONG ulCompareValue = portTIMER_COMPARE;\r
+unsigned portSHORT usTimerCompare;\r
+\r
+ usTimerCompare = ( unsigned portSHORT ) ( ulCompareValue >> 4UL );\r
+ t2_init( portENABLE_TIMER, portPRESCALE_VALUE, NULL );\r
+\r
+ #if( configUSE_PREEMPTION == 1 )\r
+ /* Tick service routine used by the scheduler when preemptive scheduling is\r
+ being used. */\r
+ t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvPreemptiveTick );\r
+ #else\r
+ /* Tick service routine used by the scheduler when cooperative scheduling is\r
+ being used. */\r
+ t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvNonPreemptiveTick );\r
+ #endif\r
+}\r
+\r
+\r
+\r
+\r
+\r
+\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section\r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license\r
+ and contact details. Please ensure to read the configuration and relevant\r
+ port sections of the online documentation.\r
+ ***************************************************************************\r
+*/\r
+\r
+\r
+/*-----------------------------------------------------------\r
+ * Implementation of functions defined in portable.h for the Tern EE 186\r
+ * port.\r
+ *----------------------------------------------------------*/\r
+\r
+/* Library includes. */\r
+#include <embedded.h>\r
+#include <ae.h>\r
+\r
+/* Scheduler includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "portasm.h"\r
+\r
+/* The timer increments every four clocks, hence the divide by 4. */\r
+#define portPRESCALE_VALUE ( 16 )\r
+#define portTIMER_COMPARE ( configCPU_CLOCK_HZ / ( configTICK_RATE_HZ * 4UL ) )\r
+\r
+/* From the RDC data sheet. */\r
+#define portENABLE_TIMER_AND_INTERRUPT ( unsigned portSHORT ) 0xe00b\r
+#define portENABLE_TIMER ( unsigned portSHORT ) 0xC001\r
+\r
+/* Interrupt control. */\r
+#define portEIO_REGISTER 0xff22\r
+#define portCLEAR_INTERRUPT 0x0008\r
+\r
+/* Setup the hardware to generate the required tick frequency. */\r
+static void prvSetupTimerInterrupt( void );\r
+\r
+/* The ISR used depends on whether the preemptive or cooperative scheduler\r
+is being used. */\r
+#if( configUSE_PREEMPTION == 1 )\r
+ /* Tick service routine used by the scheduler when preemptive scheduling is\r
+ being used. */\r
+ static void __interrupt __far prvPreemptiveTick( void );\r
+#else\r
+ /* Tick service routine used by the scheduler when cooperative scheduling is\r
+ being used. */\r
+ static void __interrupt __far prvNonPreemptiveTick( void );\r
+#endif\r
+\r
+/* Trap routine used by taskYIELD() to manually cause a context switch. */\r
+static void __interrupt __far prvYieldProcessor( void );\r
+\r
+/*-----------------------------------------------------------*/\r
+/* See header file for description. */\r
+portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )\r
+{\r
+portSTACK_TYPE DS_Reg = 0;\r
+\r
+ /* We need the true data segment. */\r
+ __asm{ MOV DS_Reg, DS };\r
+\r
+ /* Place a few bytes of known values on the bottom of the stack.\r
+ This is just useful for debugging. */\r
+\r
+ *pxTopOfStack = 0x1111;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = 0x2222;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = 0x3333;\r
+ pxTopOfStack--;\r
+\r
+ /* We are going to start the scheduler using a return from interrupt\r
+ instruction to load the program counter, so first there would be the\r
+ function call with parameters preamble. */\r
+ \r
+ *pxTopOfStack = FP_OFF( pvParameters );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_OFF( pxCode );\r
+ pxTopOfStack--;\r
+\r
+ /* Next the status register and interrupt return address. */\r
+ *pxTopOfStack = portINITIAL_SW;\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_SEG( pxCode );\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = FP_OFF( pxCode );\r
+ pxTopOfStack--;\r
+\r
+ /* The remaining registers would be pushed on the stack by our context\r
+ switch function. These are loaded with values simply to make debugging\r
+ easier. */\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xAAAA; /* AX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xCCCC; /* CX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DX */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xEEEE; /* ES */\r
+ pxTopOfStack--;\r
+\r
+ *pxTopOfStack = DS_Reg; /* DS */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0x0123; /* SI */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DI */\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BP */\r
+\r
+ return pxTopOfStack;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+portBASE_TYPE xPortStartScheduler( void )\r
+{\r
+ /* This is called with interrupts already disabled. */\r
+\r
+ /* Put our manual switch (yield) function on a known\r
+ vector. */\r
+ setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );\r
+\r
+ /* Setup the tick interrupt. */\r
+ prvSetupTimerInterrupt();\r
+\r
+ /* Kick off the scheduler by setting up the context of the first task. */\r
+ portFIRST_CONTEXT();\r
+\r
+ /* Should not get here! */\r
+ return pdFALSE;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* The ISR used depends on whether the preemptive or cooperative scheduler\r
+is being used. */\r
+#if( configUSE_PREEMPTION == 1 )\r
+ static void __interrupt __far prvPreemptiveTick( void )\r
+ {\r
+ /* Get the scheduler to update the task states following the tick. */\r
+ vTaskIncrementTick();\r
+\r
+ /* Switch in the context of the next task to be run. */\r
+ portEND_SWITCHING_ISR();\r
+\r
+ /* Reset interrupt. */\r
+ outport( portEIO_REGISTER, portCLEAR_INTERRUPT );\r
+ }\r
+#else\r
+ static void __interrupt __far prvNonPreemptiveTick( void )\r
+ {\r
+ /* Same as preemptive tick, but the cooperative scheduler is being used\r
+ so we don't have to switch in the context of the next task. */\r
+ vTaskIncrementTick();\r
+ /* Reset interrupt. */\r
+ outport( portEIO_REGISTER, portCLEAR_INTERRUPT );\r
+ }\r
+#endif\r
+/*-----------------------------------------------------------*/\r
+\r
+static void __interrupt __far prvYieldProcessor( void )\r
+{\r
+ /* Switch in the context of the next task to be run. */\r
+ portEND_SWITCHING_ISR();\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortEndScheduler( void )\r
+{\r
+ /* Not implemented. */\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvSetupTimerInterrupt( void )\r
+{\r
+const unsigned portLONG ulCompareValue = portTIMER_COMPARE;\r
+unsigned portSHORT usTimerCompare;\r
+\r
+ usTimerCompare = ( unsigned portSHORT ) ( ulCompareValue >> 4 );\r
+ t2_init( portENABLE_TIMER, portPRESCALE_VALUE, NULL );\r
+\r
+ #if( configUSE_PREEMPTION == 1 )\r
+ /* Tick service routine used by the scheduler when preemptive scheduling is\r
+ being used. */\r
+ t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvPreemptiveTick );\r
+ #else\r
+ /* Tick service routine used by the scheduler when cooperative scheduling is\r
+ being used. */\r
+ t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvNonPreemptiveTick );\r
+ #endif\r
+}\r
+\r
+\r
+\r
+\r
+\r
+\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section \r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license \r
+ and contact details. Please ensure to read the configuration and relevant \r
+ port sections of the online documentation.\r
+ ***************************************************************************\r
+*/\r
+\r
+#ifndef PORT_ASM_H\r
+#define PORT_ASM_H\r
+\r
+typedef void tskTCB;\r
+extern volatile tskTCB * volatile pxCurrentTCB;\r
+extern void vTaskSwitchContext( void );\r
+\r
+/*\r
+ * Saves the stack pointer for one task into its TCB, calls\r
+ * vTaskSwitchContext() to update the TCB being used, then restores the stack\r
+ * from the new TCB read to run the task.\r
+ */\r
+void portEND_SWITCHING_ISR( void );\r
+\r
+/*\r
+ * Load the stack pointer from the TCB of the task which is going to be first\r
+ * to execute. Then force an IRET so the registers and IP are popped off the\r
+ * stack.\r
+ */\r
+void portFIRST_CONTEXT( void );\r
+\r
+#define portEND_SWITCHING_ISR() \\r
+ asm { mov bx, [pxCurrentTCB] } \\r
+ asm { mov word ptr [bx], sp } \\r
+ asm { call far ptr vTaskSwitchContext } \\r
+ asm { mov bx, [pxCurrentTCB] } \\r
+ asm { mov sp, [bx] }\r
+\r
+#define portFIRST_CONTEXT() \\r
+ asm { mov bx, [pxCurrentTCB] } \\r
+ asm { mov sp, [bx] } \\r
+ asm { pop bp } \\r
+ asm { pop di } \\r
+ asm { pop si } \\r
+ asm { pop ds } \\r
+ asm { pop es } \\r
+ asm { pop dx } \\r
+ asm { pop cx } \\r
+ asm { pop bx } \\r
+ asm { pop ax } \\r
+ asm { iret }\r
+\r
+\r
+#endif\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU General Public License for more details.\r
+\r
+ You should have received a copy of the GNU General Public License\r
+ along with FreeRTOS; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+\r
+ A special exception to the GPL can be applied should you wish to distribute\r
+ a combined work that includes FreeRTOS, without being obliged to provide\r
+ the source code for any proprietary components. See the licensing section \r
+ of http://www.FreeRTOS.org for full details of how and when the exception\r
+ can be applied.\r
+\r
+ ***************************************************************************\r
+ See http://www.FreeRTOS.org for documentation, latest information, license \r
+ and contact details. Please ensure to read the configuration and relevant \r
+ port sections of the online documentation.\r
+ ***************************************************************************\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
+/* Type definitions. */\r
+#define portCHAR char\r
+#define portFLOAT float\r
+#define portDOUBLE long\r
+#define portLONG long\r
+#define portSHORT int\r
+#define portSTACK_TYPE unsigned portSHORT\r
+#define portBASE_TYPE portSHORT\r
+\r
+typedef void ( __interrupt __far *pxISR )();\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
+/* Critical section handling. */\r
+#define portENTER_CRITICAL() __asm{ pushf } \\r
+ __asm{ cli } \\r
+\r
+#define portEXIT_CRITICAL() __asm{ popf }\r
+\r
+#define portDISABLE_INTERRUPTS() __asm{ cli }\r
+\r
+#define portENABLE_INTERRUPTS() __asm{ sti }\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Hardware specifics. */\r
+#define portNOP() __asm{ nop }\r
+#define portSTACK_GROWTH ( -1 )\r
+#define portSWITCH_INT_NUMBER 0x80\r
+#define portYIELD() __asm{ int portSWITCH_INT_NUMBER } \r
+#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ ) \r
+#define portBYTE_ALIGNMENT 2\r
+#define portINITIAL_SW ( ( portSTACK_TYPE ) 0x0202 ) /* Start the tasks with interrupts enabled. */\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Compiler specifics. */\r
+#define portINPUT_BYTE( xAddr ) inp( xAddr )\r
+#define portOUTPUT_BYTE( xAddr, ucValue ) outp( xAddr, ucValue )\r
+#define portINPUT_WORD( xAddr ) inpw( xAddr )\r
+#define portOUTPUT_WORD( xAddr, usValue ) outpw( xAddr, usValue )\r
+#define inline\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task function macros as described on the FreeRTOS.org WEB site. */\r
+#define portTASK_FUNCTION_PROTO( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )\r
+#define portTASK_FUNCTION( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )\r
+\r
+#endif /* PORTMACRO_H */\r
+\r
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