125 lines
5.2 KiB
C
125 lines
5.2 KiB
C
/**
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* Copyright (c) 2022, Nations Technologies Inc.
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*
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* All rights reserved.
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*
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* This software is the exclusive property of Nations Technologies Inc. (Hereinafter
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* referred to as NATIONS). This software, and the product of NATIONS described herein
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* (Hereinafter referred to as the Product) are owned by NATIONS under the laws and treaties
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* of the People’s Republic of China and other applicable jurisdictions worldwide.
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*
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* NATIONS does not grant any license under its patents, copyrights, trademarks, or other
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* intellectual property rights. Names and brands of third party may be mentioned or referred
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* thereto (if any) for identification purposes only.
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*
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* NATIONS reserves the right to make changes, corrections, enhancements, modifications, and
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* improvements to this software at any time without notice. Please contact NATIONS and obtain
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* the latest version of this software before placing orders.
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* Although NATIONS has attempted to provide accurate and reliable information, NATIONS assumes
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* no responsibility for the accuracy and reliability of this software.
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*
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* It is the responsibility of the user of this software to properly design, program, and test
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* the functionality and safety of any application made of this information and any resulting product.
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* In no event shall NATIONS be liable for any direct, indirect, incidental, special,exemplary, or
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* consequential damages arising in any way out of the use of this software or the Product.
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*
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* NATIONS Products are neither intended nor warranted for usage in systems or equipment, any
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* malfunction or failure of which may cause loss of human life, bodily injury or severe property
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* damage. Such applications are deemed, “Insecure Usage”.
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*
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* All Insecure Usage shall be made at user’s risk. User shall indemnify NATIONS and hold NATIONS
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* harmless from and against all claims, costs, damages, and other liabilities, arising from or related
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* to any customer’s Insecure Usage.
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* Any express or implied warranty with regard to this software or the Product, including,but not
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* limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement
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* are disclaimed to the fullest extent permitted by law.
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* Unless otherwise explicitly permitted by NATIONS, anyone may not duplicate, modify, transcribe
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* or otherwise distribute this software for any purposes, in whole or in part.
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*
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* NATIONS products and technologies shall not be used for or incorporated into any products or systems
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* whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations.
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* User shall comply with any applicable export control laws and regulations promulgated and administered by
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* the governments of any countries asserting jurisdiction over the parties or transactions.
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**/
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/**
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*\*\file bsp_delay.c
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*\*\author Nations
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*\*\version v1.0.0
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*\*\copyright Copyright (c) 2022, Nations Technologies Inc. All rights reserved.
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**/
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#include "bsp_delay.h"
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/**
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*\*\name DBG_SysTick_Config.
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*\*\fun System tick configuration.
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*\*\param ticks :system tick
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*\*\return none
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**/
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static uint32_t DBG_SysTick_Config(uint32_t ticks)
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{
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if (ticks > SysTick_LOAD_RELOAD_Msk) return (1); /* Reload value impossible */
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SysTick->LOAD = (ticks & SysTick_LOAD_RELOAD_Msk) - 1; /* set reload register */
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NVIC_SetPriority (SysTick_IRQn, (1<<__NVIC_PRIO_BITS) - 1); /* set Priority for Cortex-M0 System Interrupts */
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SysTick->VAL = 0; /* Load the SysTick Counter Value */
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SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk |
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SysTick_CTRL_ENABLE_Msk; /* Enable SysTick IRQ and SysTick Timer */
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SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk;
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return (0); /* Function successful */
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}
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/**
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*\*\name SysTick_Delay_Us.
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*\*\fun microsecond delay.
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*\*\param us :any number
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*\*\return none
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**/
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void SysTick_Delay_Us( __IO uint32_t us)
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{
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uint32_t i;
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RCC_ClocksType RCC_Clocks;
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RCC_Clocks_Frequencies_Value_Get(&RCC_Clocks);
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DBG_SysTick_Config(RCC_Clocks.SysclkFreq / 1000000);
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for(i=0;i<us;i++)
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{
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/* When the counter value decreases to 0, bit 16 of the CRTL register will be set to 1 */
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/* When set to 1, reading this bit will clear it to 0 */
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while( !((SysTick->CTRL)&(1<<16)) );
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}
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/* Turn off the SysTick timer */
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SysTick->CTRL &=~ SysTick_CTRL_ENABLE_Msk;
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}
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/**
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*\*\name SysTick_Delay_Us.
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*\*\fun millisecond delay.
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*\*\param ms :any number
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*\*\return none
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**/
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void SysTick_Delay_Ms( __IO uint32_t ms)
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{
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uint32_t i;
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RCC_ClocksType RCC_Clocks;
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RCC_Clocks_Frequencies_Value_Get(&RCC_Clocks);
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DBG_SysTick_Config(RCC_Clocks.SysclkFreq / 1000);
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for(i=0;i<ms;i++)
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{
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/* When the counter value decreases to 0, bit 16 of the CRTL register will be set to 1 */
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/* When set to 1, reading this bit will clear it to 0 */
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while( !((SysTick->CTRL)&(1<<16)) );
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}
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/* Turn off the SysTick timer */
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SysTick->CTRL &=~ SysTick_CTRL_ENABLE_Msk;
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}
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