2、开始边看手册边开例程GPIO亮灯。灯未亮，查原理图，发现需要用跳线短接PA0和LED1。短接后正常。随后试用了按键控制LED1，完成GPIO输入输出基本测试。修改GPIO亮灯程序，做了一个简单的呼吸灯。
/********************************** (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.
* SPDX-License-Identifier: Apache-2.0
*******************************************************************************/
/*
*@Note
GPIO例程：
PA0推挽输出。
*/
#include "debug.h"
/* Global define */
/* Global Variable */
/*********************************************************************
* @fn GPIO_Toggle_INIT
*
* @brief Initializes GPIOA.0
*
* @return none
*/
void GPIO_Toggle_INIT(void)
{
GPIO_InitTypeDef GPIO_InitStructure = {0};
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/*********************************************************************
* @fn main
*
* @brief Main program.
*
* @return none
*/
u8 i = 100;
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
Delay_Init();
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n", SystemCoreClock);
printf("GPIO Toggle TEST\r\n");
GPIO_Toggle_INIT();
while(1)
{
//秒闪灯
// Delay_Ms(500);
// GPIO_WriteBit(GPIOA, GPIO_Pin_0, (i == 0) ? (i = Bit_SET) : (i = Bit_RESET));
//按键控制灯
// i = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_1);
// if (i == 0) {GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_RESET);}
// else {GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_SET);}
//呼吸灯
if (i <= 25)
{
GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_RESET);
Delay_Ms(i);
GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_SET);
Delay_Ms(25-i);
}
if ((i > 25)&&(i <= 50))
{
GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_RESET);
Delay_Ms(50-i);
GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_SET);
Delay_Ms(i-25);
}
if (i > 50)
{
i=0;
}
i++;
}
}
3、试用定时器功能。库函数说明没找着。看注释试着改参数，将LED灯改为一秒一次的心跳灯。
/********************************** (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.
* SPDX-License-Identifier: Apache-2.0
*******************************************************************************/
/*
*@Note
PWM输出例程：
TIM1_CH1(PA8)
本例程演示 TIM_CH1(PA8) 引脚在 PWM模式1和PWM模式2 下，输出 PWM。
*/
#include "debug.h"
/* PWM Output Mode Definition */
#define PWM_MODE1 0
#define PWM_MODE2 1
/* PWM Output Mode Selection */
//#define PWM_MODE PWM_MODE1
#define PWM_MODE PWM_MODE2
/*********************************************************************
* @fn TIM1_OutCompare_Init
*
* @brief Initializes TIM1 output compare.
*
* @param arr - the period value.
* psc - the prescaler value.
* ccp - the pulse value.
*
* @return none
*/
void TIM1_PWMOut_Init( u16 arr, u16 psc, u16 ccp )
{
GPIO_InitTypeDef GPIO_InitStructure={0};
TIM_OCInitTypeDef TIM_OCInitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, 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 );
TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM1, &TIM_TimeBaseInitStructure);
#if (PWM_MODE == PWM_MODE1)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
#elif (PWM_MODE == PWM_MODE2)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
#endif
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = ccp;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init( TIM1, &TIM_OCInitStructure );
TIM_CtrlPWMOutputs(TIM1, ENABLE );
TIM_OC1PreloadConfig( TIM1, TIM_OCPreload_Disable );
TIM_ARRPreloadConfig( TIM1, ENABLE );
TIM_Cmd( TIM1, ENABLE );
}
/*********************************************************************
* @fn main
*
* @brief Main program.
*
* @return none
*/
int main(void)
{
USART_Printf_Init(115200);
printf("SystemClk:%d\r\n",SystemCoreClock);
TIM1_PWMOut_Init( 1000, 65535, 500 );
while(1)
{
;
}
}
WCH测试视频.zip
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丙丁先生
发表于2022-7-14 06:23:08
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测试视频打不开啊
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