95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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*VTF IRQ interrupt routine:
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*This example is used to demonstrate VTF IRQ
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*/
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#include "debug.h"
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/* Global define */
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/* Global Variable */
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uint32_t time=0;
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void SysTick_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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/*********************************************************************
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* @fn Interrupt_VTF_Init
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*
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* @brief Initializes VTF.
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*
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* @return none
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*/
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void Interrupt_VTF_Init(void)
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{
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NVIC_EnableIRQ(SysTicK_IRQn);
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SetVTFIRQ((u32)SysTick_Handler,SysTicK_IRQn,0,ENABLE);
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}
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/*********************************************************************
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* @fn Systick_Init
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*
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* @brief Initializes Systick.
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*
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* @return none
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*/
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void Systick_Init(void)
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{
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SysTick->SR=0;
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SysTick->CNT=0;
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SysTick->CMP=0x20;
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SysTick->CTLR=0x7;
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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SystemCoreClockUpdate();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n",SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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printf("Interrupt VTF Test\r\n");
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Interrupt_VTF_Init();
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Systick_Init();
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while(1)
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{
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}
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}
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/*********************************************************************
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* @fn SysTick_Handler
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*
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* @brief This function handles SysTick exception.
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*
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* @return none
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*/
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void SysTick_Handler(void)
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{
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time=SysTick->CNT;
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SysTick->CTLR=0;
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SysTick->SR=0;
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printf("delta time:%d\r\n",time-0x20);
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}
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