51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/********************************** (C) COPYRIGHT *******************************
|
|
* File Name : main.c
|
|
* Author : WCH
|
|
* Version : V1.0.0
|
|
* Date : 2021/06/06
|
|
* Description : Main program body.
|
|
*********************************************************************************
|
|
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
|
|
* Attention: This software (modified or not) and binary are used for
|
|
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
|
|
*******************************************************************************/
|
|
|
|
/*
|
|
*@Note
|
|
*MCO pin clock output routine:
|
|
*MCO(PA8)
|
|
*This example demonstrates that the MCO(PA8) pin outputs the system clock.
|
|
*
|
|
*/
|
|
|
|
#include "debug.h"
|
|
|
|
/*********************************************************************
|
|
* @fn main
|
|
*
|
|
* @brief Main program.
|
|
*
|
|
* @return none
|
|
*/
|
|
int main(void)
|
|
{
|
|
GPIO_InitTypeDef GPIO_InitStructure={0};
|
|
SystemCoreClockUpdate();
|
|
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
|
|
USART_Printf_Init(115200);
|
|
printf("SystemClk:%d\r\n",SystemCoreClock);
|
|
printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
|
|
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
|
|
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
|
|
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
|
|
GPIO_Init(GPIOA, &GPIO_InitStructure);
|
|
|
|
/* MCO Output GPIOA 8 */
|
|
RCC_MCOConfig( RCC_MCO_SYSCLK );
|
|
|
|
while(1);
|
|
}
|