diff options
Diffstat (limited to 'bsps/arm/lpc24xx/include/bsp/system-clocks.h')
-rw-r--r-- | bsps/arm/lpc24xx/include/bsp/system-clocks.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/bsps/arm/lpc24xx/include/bsp/system-clocks.h b/bsps/arm/lpc24xx/include/bsp/system-clocks.h new file mode 100644 index 0000000000..564d12ec10 --- /dev/null +++ b/bsps/arm/lpc24xx/include/bsp/system-clocks.h @@ -0,0 +1,89 @@ +/** + * @file + * + * @ingroup lpc24xx_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_LPC24XX_SYSTEM_CLOCKS_H +#define LIBBSP_ARM_LPC24XX_SYSTEM_CLOCKS_H + +#include <bsp/lpc24xx.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/** + * @defgroup lpc24xx_clock System Clocks + * + * @ingroup lpc24xx + * + * @brief System clocks. + * + * @{ + */ + +/** + * @brief Initializes the standard timer. + * + * This function uses Timer 1. + */ +void lpc24xx_timer_initialize(void); + +/** + * @brief Returns current standard timer value in CPU clocks. + * + * This function uses Timer 1. + */ +static inline unsigned lpc24xx_timer(void) +{ + return 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 lpc24xx_micro_seconds_delay(unsigned us); + +/** + * @brief Returns the PLL output clock frequency in [Hz]. + * + * Returns zero in case of an unexpected PLL input frequency. + */ +unsigned lpc24xx_pllclk(void); + +/** + * @brief Returns the CPU clock frequency in [Hz]. + * + * Returns zero in case of an unexpected PLL input frequency. + */ +unsigned lpc24xx_cclk(void); + +/** @} */ + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LIBBSP_ARM_LPC24XX_SYSTEM_CLOCKS_H */ |