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Diffstat (limited to 'FreeRTOS/Demo/RISC-V-spike-htif_GCC/main_blinky.c')
-rw-r--r-- | FreeRTOS/Demo/RISC-V-spike-htif_GCC/main_blinky.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/RISC-V-spike-htif_GCC/main_blinky.c b/FreeRTOS/Demo/RISC-V-spike-htif_GCC/main_blinky.c new file mode 100644 index 000000000..f2604f8b2 --- /dev/null +++ b/FreeRTOS/Demo/RISC-V-spike-htif_GCC/main_blinky.c @@ -0,0 +1,137 @@ +/* + * FreeRTOS V202012.00 + * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER + * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * https://www.FreeRTOS.org + * https://github.com/FreeRTOS + * + */ + +/* FreeRTOS kernel includes. */ +#include <FreeRTOS.h> +#include <task.h> +#include <queue.h> + +#include <stdio.h> + +#include "riscv-virt.h" + +/* Priorities used by the tasks. */ +#define mainQUEUE_RECEIVE_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 ) +#define mainQUEUE_SEND_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 ) + +/* The rate at which data is sent to the queue. The 200ms value is converted +to ticks using the pdMS_TO_TICKS() macro. */ +#define mainQUEUE_SEND_FREQUENCY_MS pdMS_TO_TICKS( 1000 ) + +/* The maximum number items the queue can hold. The priority of the receiving +task is above the priority of the sending task, so the receiving task will +preempt the sending task and remove the queue items each time the sending task +writes to the queue. Therefore the queue will never have more than one item in +it at any time, and even with a queue length of 1, the sending task will never +find the queue full. */ +#define mainQUEUE_LENGTH ( 1 ) + +/*-----------------------------------------------------------*/ + +/* The queue used by both tasks. */ +static QueueHandle_t xQueue = NULL; + +/*-----------------------------------------------------------*/ + +static void prvQueueSendTask( void *pvParameters ) +{ + TickType_t xNextWakeTime; + unsigned long ulValueToSend = 0UL; + + /* Remove compiler warning about unused parameter. */ + ( void ) pvParameters; + + /* Initialise xNextWakeTime - this only needs to be done once. */ + xNextWakeTime = xTaskGetTickCount(); + + for( ;; ) + { + /* Place this task in the blocked state until it is time to run again. */ + vTaskDelayUntil( &xNextWakeTime, mainQUEUE_SEND_FREQUENCY_MS ); + + ulValueToSend++; + + char buf[40]; + sprintf( buf, "%d: %s: send %ld", xGetCoreID(), + pcTaskGetName( xTaskGetCurrentTaskHandle() ), + ulValueToSend ); + vSendString( buf ); + + /* 0 is used as the block time so the sending operation will not block - + * it shouldn't need to block as the queue should always be empty at + * this point in the code. */ + xQueueSend( xQueue, &ulValueToSend, 0U ); + } +} + +/*-----------------------------------------------------------*/ + +static void prvQueueReceiveTask( void *pvParameters ) +{ + /* Remove compiler warning about unused parameter. */ + ( void ) pvParameters; + + for( ;; ) + { + + unsigned long ulReceivedValue; + /* Wait until something arrives in the queue - this task will block + indefinitely provided INCLUDE_vTaskSuspend is set to 1 in + FreeRTOSConfig.h. */ + xQueueReceive( xQueue, &ulReceivedValue, portMAX_DELAY ); + + /* To get here something must have been received from the queue. */ + char buf[40]; + sprintf( buf, "%d: %s: received %ld", xGetCoreID(), + pcTaskGetName( xTaskGetCurrentTaskHandle() ), + ulReceivedValue ); + vSendString( buf ); + } +} + +/*-----------------------------------------------------------*/ + +int main_blinky( void ) +{ + vSendString( "Hello FreeRTOS!" ); + + /* Create the queue. */ + xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( unsigned long ) ); + + if( xQueue != NULL ) + { + /* Start the two tasks as described in the comments at the top of this + file. */ + xTaskCreate( prvQueueReceiveTask, "Rx", configMINIMAL_STACK_SIZE * 2U, NULL, + mainQUEUE_RECEIVE_TASK_PRIORITY, NULL ); + xTaskCreate( prvQueueSendTask, "Tx", configMINIMAL_STACK_SIZE * 2U, NULL, + mainQUEUE_SEND_TASK_PRIORITY, NULL ); + } + + vTaskStartScheduler(); + + return 0; +} |