forked from Imagelibrary/rtems
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
/**
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* @file
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*
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* @ingroup RTEMSBSPsARMLPC24XX
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*
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* @brief Benchmark timer support.
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*/
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/*
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* Copyright (c) 2008, 2009
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* D-82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <rtems.h>
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#include <bsp.h>
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#include <rtems/btimer.h>
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#include <bsp/system-clocks.h>
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bool benchmark_timer_find_average_overhead = false;
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static uint32_t benchmark_timer_base;
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void benchmark_timer_initialize(void)
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{
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benchmark_timer_base = lpc24xx_timer();
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}
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benchmark_timer_t benchmark_timer_read(void)
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{
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uint32_t delta = lpc24xx_timer() - benchmark_timer_base;
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if (benchmark_timer_find_average_overhead) {
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return delta;
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} else {
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/* Value determined by tmck for NCS board */
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if (delta > 74) {
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return delta - 74;
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} else {
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return 0;
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}
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}
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}
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void benchmark_timer_disable_subtracting_average_overhead(bool find_average_overhead )
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{
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benchmark_timer_find_average_overhead = find_average_overhead;
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}
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