2 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * SPDX-License-Identifier: MIT
7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
8 * this software and associated documentation files (the "Software"), to deal in
9 * the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11 * the Software, and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in all
15 * copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * https://www.FreeRTOS.org
25 * https://github.com/FreeRTOS
38 /*-----------------------------------------------------------
39 * Port specific definitions.
41 * The settings in this file configure FreeRTOS correctly for the
42 * given hardware and compiler.
44 * These settings should not be altered.
45 *-----------------------------------------------------------
50 /* Type definitions. */
52 #define portFLOAT float
53 #define portDOUBLE double
57 #define portPOINTER_SIZE_TYPE uint16_t
59 typedef uint8_t StackType_t;
60 typedef int8_t BaseType_t;
61 typedef uint8_t UBaseType_t;
63 #if configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS
64 typedef uint16_t TickType_t;
65 #define portMAX_DELAY ( TickType_t ) 0xffff
66 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
67 typedef uint32_t TickType_t;
68 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
70 #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
72 /*-----------------------------------------------------------*/
74 /* Critical section management. */
76 #define portENTER_CRITICAL() __asm__ __volatile__ ( \
77 "in __tmp_reg__, __SREG__" "\n\t" \
79 "push __tmp_reg__" "\n\t" \
84 #define portEXIT_CRITICAL() __asm__ __volatile__ ( \
85 "pop __tmp_reg__" "\n\t" \
86 "out __SREG__, __tmp_reg__" "\n\t" \
91 #define portDISABLE_INTERRUPTS() __asm__ __volatile__ ( "cli" ::: "memory")
92 #define portENABLE_INTERRUPTS() __asm__ __volatile__ ( "sei" ::: "memory")
93 /*-----------------------------------------------------------*/
95 /* Architecture specifics. */
97 /* System Tick - Scheduler timer
98 * Prefer to use the enhanced Watchdog Timer, but also Timer0 is ok.
101 #if defined(WDIE) && defined(WDIF) /* If Enhanced WDT with interrupt capability is available */
103 #define portUSE_WDTO WDTO_15MS /* use the Watchdog Timer for xTaskIncrementTick */
105 /* Watchdog period options: WDTO_15MS
117 #define portUSE_TIMER0 /* use the 8-bit Timer0 for xTaskIncrementTick */
121 #define portSTACK_GROWTH ( -1 )
123 /* Timing for the scheduler.
124 * Watchdog Timer is 128kHz nominal,
125 * but 120 kHz at 5V DC and 25 degrees is actually more accurate,
128 #if defined( portUSE_WDTO )
129 #define portTICK_PERIOD_MS ( (TickType_t) _BV( portUSE_WDTO + 4 ) )
131 #define portTICK_PERIOD_MS ( (TickType_t) 1000 / configTICK_RATE_HZ )
134 #define portBYTE_ALIGNMENT 1
135 #define portNOP() __asm__ __volatile__ ( "nop" );
136 /*-----------------------------------------------------------*/
138 /* Kernel utilities. */
139 extern void vPortYield( void ) __attribute__ ( ( naked ) );
140 #define portYIELD() vPortYield()
142 extern void vPortYieldFromISR( void ) __attribute__ ( ( naked ) );
143 #define portYIELD_FROM_ISR() vPortYieldFromISR()
144 /*-----------------------------------------------------------*/
146 #if defined(__AVR_3_BYTE_PC__)
147 /* Task function macros as described on the FreeRTOS.org WEB site. */
149 /* Add .lowtext tag from the avr linker script avr6.x for ATmega2560 and ATmega2561
150 * to make sure functions are loaded in low memory.
152 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters ) __attribute__ ((section (".lowtext")))
154 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
157 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
165 #endif /* PORTMACRO_H */