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Diffstat (limited to 'libmaple/systick.h')
-rw-r--r-- | libmaple/systick.h | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/libmaple/systick.h b/libmaple/systick.h deleted file mode 100644 index 6ec3364..0000000 --- a/libmaple/systick.h +++ /dev/null @@ -1,117 +0,0 @@ -/****************************************************************************** - * The MIT License - * - * Copyright (c) 2010 Perry Hung. - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, copy, - * modify, merge, publish, distribute, sublicense, and/or sell copies - * of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - *****************************************************************************/ - -/** - * @file systick.h - * - * @brief Various system timer definitions - */ - -#ifndef _SYSTICK_H_ -#define _SYSTICK_H_ - -#include "libmaple_types.h" -#include "util.h" - -#ifdef __cplusplus -extern "C"{ -#endif - -/** SysTick register map type */ -typedef struct systick_reg_map { - __io uint32 CSR; /**< Control and status register */ - __io uint32 RVR; /**< Reload value register */ - __io uint32 CNT; /**< Current value register ("count") */ - __io uint32 CVR; /**< Calibration value register */ -} systick_reg_map; - -/** SysTick register map base pointer */ -#define SYSTICK_BASE ((struct systick_reg_map*)0xE000E010) - -/* - * Register bit definitions. - */ - -/* Control and status register */ - -#define SYSTICK_CSR_COUNTFLAG BIT(16) -#define SYSTICK_CSR_CLKSOURCE BIT(2) -#define SYSTICK_CSR_CLKSOURCE_EXTERNAL 0 -#define SYSTICK_CSR_CLKSOURCE_CORE BIT(2) -#define SYSTICK_CSR_TICKINT BIT(1) -#define SYSTICK_CSR_TICKINT_PEND BIT(1) -#define SYSTICK_CSR_TICKINT_NO_PEND 0 -#define SYSTICK_CSR_ENABLE BIT(0) -#define SYSTICK_CSR_ENABLE_MULTISHOT BIT(0) -#define SYSTICK_CSR_ENABLE_DISABLED 0 - -/* Calibration value register */ - -#define SYSTICK_CVR_NOREF BIT(31) -#define SYSTICK_CVR_SKEW BIT(30) -#define SYSTICK_CVR_TENMS 0xFFFFFF - -/** System elapsed time, in milliseconds */ -extern volatile uint32 systick_uptime_millis; - -/** - * @brief Returns the system uptime, in milliseconds. - */ -static inline uint32 systick_uptime(void) { - return systick_uptime_millis; -} - - -void systick_init(uint32 reload_val); -void systick_disable(); -void systick_enable(); - -/** - * @brief Returns the current value of the SysTick counter. - */ -static inline uint32 systick_get_count(void) { - return SYSTICK_BASE->CNT; -} - -/** - * @brief Check for underflow. - * - * This function returns 1 if the SysTick timer has counted to 0 since - * the last time it was called. However, any reads of any part of the - * SysTick Control and Status Register SYSTICK_BASE->CSR will - * interfere with this functionality. See the ARM Cortex M3 Technical - * Reference Manual for more details (e.g. Table 8-3 in revision r1p1). - */ -static inline uint32 systick_check_underflow(void) { - return SYSTICK_BASE->CSR & SYSTICK_CSR_COUNTFLAG; -} - -#ifdef __cplusplus -} // extern "C" -#endif - -#endif - |