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90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
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/**
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******************************************************************************
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*
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* @file test_cpuload.c
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
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* @brief Calibration for the CPU load calculation
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* This file is used to calculate the number of counts we get when
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* the CPU is fully idle (no load). This is used by systemmod.c to
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* calculate the CPU load. This calibration should be run whenever
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* changes are made in the FreeRTOS configuration or on the compiler
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* optimisation parameters.
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*/
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#include "openpilot.h"
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// Local constants
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#define BENCHMARK_DURATION_MS 10000
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// Local functions
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static void testTask(void *pvParameters);
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// Variables
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static uint32_t idleCounter = 0;
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static uint32_t idleCounterClear = 0;
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int main()
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{
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PIOS_SYS_Init();
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// Create test task
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xTaskCreate(testTask, (signed portCHAR *)"Test", 1000 , NULL, 1, NULL);
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// Start the FreeRTOS scheduler
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vTaskStartScheduler();
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return 0;
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}
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static void testTask(void *pvParameters)
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{
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uint32_t countsPerSecond = 0;
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while (1)
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{
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// Delay until enough required test duration
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vTaskDelay( BENCHMARK_DURATION_MS / portTICK_RATE_MS );
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// Calculate counts per second, set breakpoint here
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countsPerSecond = idleCounter / (BENCHMARK_DURATION_MS/1000);
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// Reset and start again - do not clear idleCounter directly!
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// SET BREAKPOINT HERE and read the countsPerSecond variable
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// this should be used to update IDLE_COUNTS_PER_SEC_AT_NO_LOAD in systemmod.c
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idleCounterClear = 1;
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}
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}
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void vApplicationIdleHook(void)
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{
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/* Called when the scheduler has no tasks to run */
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if (idleCounterClear == 0)
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{
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++idleCounter;
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}
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else
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{
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idleCounter = 0;
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idleCounterClear = 0;
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}
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}
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