72 lines
1.6 KiB
C
72 lines
1.6 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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*Systick interrupt:
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*USART1_Tx(PA9).
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*
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*
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*/
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#include "debug.h"
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/* Global typedef */
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/* Global define */
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/* Global Variable */
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void SysTick_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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u32 counter=0;
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void SYSTICK_Init_Config(u64 ticks)
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{
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SysTick->SR = 0;
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SysTick->CNT = 0;
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SysTick->CMP = ticks;
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SysTick->CTLR =0xF;
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NVIC_SetPriority(SysTicK_IRQn, 15);
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NVIC_EnableIRQ(SysTicK_IRQn);
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}
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void SysTick_Handler(void)
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{
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printf("welcome to WCH\r\n");
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SysTick->SR = 0;
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counter++;
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printf("Counter:%d\r\n",counter);
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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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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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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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SYSTICK_Init_Config(SystemCoreClock-1);
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while(1)
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{
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}
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}
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