100 lines
4.4 KiB
C
100 lines
4.4 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 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 "delay.h"
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/**
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*\*\name systick_delay_us.
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*\*\fun us delay program function.
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*\*\param nus
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*\*\return none
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**/
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void systick_delay_us(u32 nus)
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{
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u32 temp;
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SysTick_Clock_Source_Set(SYSTICK_CLKSOURCE_HCLK); //select system clock
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SysTick->LOAD=nus*(SystemClockFrequency/1000000); //time relode
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SysTick->VAL=0x00; //clear timer value
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SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ; //Start countdown
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do
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{
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temp=SysTick->CTRL;
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}
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while(temp&0x01&&!(temp&(1<<16)));//wait for the time reach
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SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk; //close the count
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SysTick->VAL =0X00; //clear timer value
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}
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/**
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*\*\name systick_delay_ms.
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*\*\fun ms delay program function.
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*\*\param nms
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*\*\return none
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**/
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void systick_delay_ms(u16 nms)
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{
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u32 temp;
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SysTick_Clock_Source_Set(SYSTICK_CLKSOURCE_HCLK); //select system clock
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SysTick->LOAD=(u32)nms*((SystemClockFrequency/1000000)*1000);//time relode(SysTick->LOAD is 24bit)
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SysTick->VAL =0x00; //clear timer value
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SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ; //Start countdown
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do
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{
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temp=SysTick->CTRL;
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}
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while(temp&0x01&&!(temp&(1<<16)));//wait for the time reach
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SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk; //close the count
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SysTick->VAL =0X00; //clear timer value
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}
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