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Diffstat (limited to 'bsps/arm/lpc24xx/start/timer.c')
-rw-r--r-- | bsps/arm/lpc24xx/start/timer.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/bsps/arm/lpc24xx/start/timer.c b/bsps/arm/lpc24xx/start/timer.c new file mode 100644 index 0000000000..c700d04566 --- /dev/null +++ b/bsps/arm/lpc24xx/start/timer.c @@ -0,0 +1,56 @@ +/** + * @file + * + * @ingroup lpc24xx + * + * @brief Benchmark timer support. + */ + +/* + * Copyright (c) 2008, 2009 + * embedded brains GmbH + * Obere Lagerstr. 30 + * D-82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#include <rtems.h> +#include <bsp.h> +#include <rtems/btimer.h> + +#include <bsp/system-clocks.h> + +bool benchmark_timer_find_average_overhead = false; + +static uint32_t benchmark_timer_base; + +void benchmark_timer_initialize(void) +{ + benchmark_timer_base = lpc24xx_timer(); +} + +benchmark_timer_t benchmark_timer_read(void) +{ + uint32_t delta = lpc24xx_timer() - benchmark_timer_base; + + if (benchmark_timer_find_average_overhead) { + return delta; + } else { + /* Value determined by tmck for NCS board */ + if (delta > 74) { + return delta - 74; + } else { + return 0; + } + } +} + +void benchmark_timer_disable_subtracting_average_overhead(bool find_average_overhead ) +{ + benchmark_timer_find_average_overhead = find_average_overhead; +} |