diff options
Diffstat (limited to 'bsps/arm/lpc176x/include/bsp/system-clocks.h')
-rw-r--r-- | bsps/arm/lpc176x/include/bsp/system-clocks.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/bsps/arm/lpc176x/include/bsp/system-clocks.h b/bsps/arm/lpc176x/include/bsp/system-clocks.h new file mode 100644 index 0000000000..26087ff3e9 --- /dev/null +++ b/bsps/arm/lpc176x/include/bsp/system-clocks.h @@ -0,0 +1,91 @@ +/** + * @file + * + * @ingroup lpc176x_clocks + * + * @brief System clocks. + */ + +/* + * 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. + */ + +#ifndef LIBBSP_ARM_LPC176X_SYSTEM_CLOCKS_H +#define LIBBSP_ARM_LPC176X_SYSTEM_CLOCKS_H + +#include <bsp/lpc176x.h> +#include <bsp/timer-defs.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/** + * @defgroup lpc176x_clock System Clocks + * + * @ingroup lpc176x + * + * @brief System clocks. + * + * @{ + */ + +/** + * @brief Initializes the standard timer. + * + * This function uses Timer 1. + */ +void lpc176x_timer_initialize( void ); + +/** + * @brief Returns current standard timer value in CPU clocks. + * + * @return This function uses Timer 1. + */ +static inline unsigned lpc176x_get_timer1( void ) +{ + return LPC176X_T1TC; +} + +/** + * @brief Delay for @a us micro seconds. + * + * This function uses the standard timer and assumes that the CPU + * frequency is in whole MHz numbers. The delay value @a us will be + * converted to CPU ticks and there is no protection against integer + * overflows. + * + * This function uses Timer 1. + */ +void lpc176x_micro_seconds_delay( unsigned us ); + +/** + * @brief Returns the PLL output clock frequency in [Hz]. + * + * @return Returns zero in case of an unexpected PLL input frequency. + */ +unsigned lpc176x_pllclk( void ); + +/** + * @brief Returns the CPU clock frequency in [Hz]. + * + * @return Returns zero in case of an unexpected PLL input frequency. + */ +unsigned lpc176x_cclk( void ); + +/** @} */ + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LIBBSP_ARM_LPC176X_SYSTEM_CLOCKS_H */ |