diff options
Diffstat (limited to 'Sensor Watch Starter Project/hpl/systick/hpl_systick.c')
-rw-r--r-- | Sensor Watch Starter Project/hpl/systick/hpl_systick.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/Sensor Watch Starter Project/hpl/systick/hpl_systick.c b/Sensor Watch Starter Project/hpl/systick/hpl_systick.c new file mode 100644 index 00000000..3caf6746 --- /dev/null +++ b/Sensor Watch Starter Project/hpl/systick/hpl_systick.c @@ -0,0 +1,103 @@ + +/** + * \file + * + * \brief SysTick related functionality implementation. + * + * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries. + * + * \asf_license_start + * + * \page License + * + * Subject to your compliance with these terms, you may use Microchip + * software and any derivatives exclusively with Microchip products. + * It is your responsibility to comply with third party license terms applicable + * to your use of third party software (including open source software) that + * may accompany Microchip software. + * + * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, + * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, + * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, + * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE + * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL + * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE + * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE + * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT + * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY + * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, + * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE. + * + * \asf_license_stop + * + */ + +#include <hpl_time_measure.h> +#include <hpl_systick_config.h> + +/** + * \brief Initialize system time module + */ +void _system_time_init(void *const hw) +{ + (void)hw; + SysTick->LOAD = (0xFFFFFF << SysTick_LOAD_RELOAD_Pos); + SysTick->CTRL = (1 << SysTick_CTRL_ENABLE_Pos) | (CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos) + | (1 << SysTick_CTRL_CLKSOURCE_Pos); +} +/** + * \brief Initialize delay functionality + */ +void _delay_init(void *const hw) +{ + _system_time_init(hw); +} + +/** + * \brief De-initialize system time module + */ +void _system_time_deinit(void *const hw) +{ + (void)hw; + SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; +} + +/** + * \brief Get system time + */ +system_time_t _system_time_get(const void *const hw) +{ + (void)hw; + return (system_time_t)SysTick->VAL; +} + +/** + * \brief Get maximum possible system time + */ +system_time_t _system_time_get_max_time_value(const void *const hw) +{ + (void)hw; + return 0xFFFFFF; +} +/** + * \brief Delay loop to delay n number of cycles + */ +void _delay_cycles(void *const hw, uint32_t cycles) +{ + (void)hw; + uint8_t n = cycles >> 24; + uint32_t buf = cycles; + + while (n--) { + SysTick->LOAD = 0xFFFFFF; + SysTick->VAL = 0xFFFFFF; + while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk)) + ; + buf -= 0xFFFFFF; + } + + SysTick->LOAD = buf; + SysTick->VAL = buf; + while (!(SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk)) + ; +} |