foreword
1. How to calibrate the voltage
2. Time jump
1. Get adc
# include "badc.h"
double getADC(ADC_HandleTypeDef *pin){
uint adc;
HAL_ADC_Start(pin);
adc=HAL_ADC_GetValue(pin);
return adc*3.3/4096;
}
}
2. Get the RTC date and time
void get_time(void) //获取时间
{
HAL_RTC_GetDate (&hrtc, &data,RTC_FORMAT_BIN);
HAL_RTC_GetTime (&hrtc, &time, RTC_FORMAT_BIN );
}
3. Rewrite the output function
int fputc(int c,FILE*stream){
HAL_UART_Transmit(&huart1,(unsigned char*)&c,1,1000);
return 1;
}
4. I2C read and write functions
1. Read data
uchar eeprom_read(uchar addr){
uchar dat;
I2CStart();
I2CSendByte(0xa0);
I2CWaitAck();
I2CSendByte(addr);
I2CWaitAck();
I2CStop();
I2CStart();
I2CSendByte(0xa1);
I2CWaitAck();
dat=I2CReceiveByte();
I2CWaitAck();
I2CStop();
return dat;
}
2. Write data
void eeprom_write (uchar addr,uchar dat){
I2CStart();
I2CSendByte(0xa0);
I2CWaitAck();
I2CSendByte(addr);
I2CWaitAck();
I2CSendByte(dat);
I2CWaitAck();
I2CStop();
}
5. Button
1. Scan four buttons and debounce
Turn on timer 3 and set it as an interrupt scan of 10ms.
1. interrupt.c file
#include "interrupt.h"
struct keys key[4]={
0, 0, 0} ;
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
if(htim->Instance==TIM3){
key[0].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0);
key[1].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1);
key[2].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_2);
key[3].key_sta=HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0);
for(int i=0;i<4;i++){
switch(key[i].judge_sta){
case 0:
{
if(key[i].key_sta==0)key[i].judge_sta=1;
}
break;
case 1:
{
if(key[i].key_sta==0){
key[i].judge_sta=2;
key[i].single_flage=1;
}
else
key[i].judge_sta=0;
}
break;
case 2:
{
if(key[i].key_sta==1)//松开
key[i].judge_sta=0;
}
break;
}
}
}
}
2. interrupt.h file
#ifndef _INTERRUPT_H_
#define _INTERRUPT_H_
#include "main.h"
#include "stdbool.h"
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim);
struct keys{
uchar judge_sta;//消抖过程的状态
bool key_sta;//按键的高低电平
bool single_flage;//是否按下的标志
};
#endif
3. Long press the .C file:
#include "interrupt.h"
struct keys key[4]={
0, 0, 0} ;
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
if(htim->Instance==TIM3){
key[0].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0);
key[1].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1);
key[2].key_sta=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_2);
key[3].key_sta=HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0);
for(int i=0;i<4;i++){
switch(key[i].judge_sta){
case 0:
{
if(key[i].key_sta==0){
key[i].judge_sta=1;
key[i].key_time=0;
}
break;
case 1:
{
if(key[i].key_sta==0){
key[i].judge_sta=2;
//按键摁下标志
}
else
key[i].judge_sta=0;
}
break;
case 2:
{
if(key[i].key_sta==1)//松开
{
key[i].judge_sta=0;
key[i].single_flage=1;//松开确定摁下
if(key[i].key_time<70){
key[i].single_flage=1;//松开确定摁下、短按键
}
}
else{
key[i].key_time++;
if(key[i].key_time>70){
key[i].long_flage=1;//长按键
}
}
}
break;
}
}
}
}
}
4. Long press the .h file:
#ifndef _INTERRUPT_H_
#define _INTERRUPT_H_
#include "main.h"
#include "stdbool.h"
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim);
struct keys{
uchar judge_sta;//消抖过程的状态
bool key_sta;//按键的高低电平
bool single_flage;//是否按下的标志
bool long_flage;//长按键的标志
uint key_time;//长按时间
};
#endif
6. LED
1、led.c
# include"led.h"
void LED_Disp(uchar dsLED){
HAL_GPIO_WritePin(GPIOC,GPIO_PIN_All,GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOC,dsLED<<8,GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_SET);//pd2置一，打开锁存器
HAL_GPIO_WritePin(GPIOD,GPIO_PIN_2,GPIO_PIN_RESET);//pd2置一，打开锁存器
}
2、led.h
#ifndef _LED_H_
#define _LED_H_
#include "main.h"
void LED_Disp(uchar dsLED);
#endif
3. Macro definition uchar and uint in main.h
Seven, LCD operation
Copy the lcd.h, font.h, lcd.c files to the bsp, add the bsp path, and add the .c file.
8. Timer
1. Advanced: 1 and 8
2. General: 2, 3, 4, 15, 16, 17
3. Basic: 6, 7
4. Tick timer
1. Capture timer frequency and duty cycle
double ccrl_val1=0,ccrl_val2=0;
int ccrl_val1b=0,ccrl_val2b=0;
uint frq1=0,frq2=0;
float duty1=0,duty2=0;//占空比
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim){
if(htim->Instance==TIM2){
if(htim->Channel==HAL_TIM_ACTIVE_CHANNEL_1){
//中断消息来源选择直接输入的通道
ccrl_val1=HAL_TIM_ReadCapturedValue(htim,TIM_CHANNEL_1);//直接
ccrl_val1b=HAL_TIM_ReadCapturedValue(htim,TIM_CHANNEL_2);//间接
__HAL_TIM_SetCounter(htim,0);
frq1=(80000000/80)/ccrl_val1;
duty1=(ccrl_val1b/ccrl_val1)*100;
HAL_TIM_IC_Start(htim,TIM_CHANNEL_1);
HAL_TIM_IC_Start(htim,TIM_CHANNEL_2);
}
}
}
2. Serial port
char rxdata[30];
uint8_t rxdat;
uchar rx_pointer;
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *hurat){
rxdata[rx_pointer++]=rxdat;
HAL_UART_Receive_IT(&huart1,&rxdat,1);
}
3. Interrupt h function
#ifndef _INTERRUPT_H_
#define _INTERRUPT_H_
#include "main.h"
#include "stdbool.h"
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim);
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim);
struct keys{
uchar judge_sta;//消抖过程的状态
bool key_sta;//按键的高低电平
bool single_flage;//是否按下的标志
bool long_flage;//长按键的标志
uint key_time;//长按时间
};
#endif
Button all the way
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)//回调函数
{
if(htim->Instance==TIM3)//定时器3的事件
{
key_state[0]=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0);
key_state[1]=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_1);
key_state[2]=HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_2);
key_state[3]=HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0);
for(int i=0;i<4;i++)
{
switch (judge_state[i])
{
case 0:
{
if(key_state[i]==0)//按键按下
{
judge_state[i]=1;
key_time[i]=0;
}
break;
}
case 1://消抖过程
{
if(key_state[i]==0)
{
judge_state[i]=2;
}
else judge_state[i]=0;//未按下
break;
}
case 2:
{
if((key_state[i]==1)&&key_time[i]<70)//等待松开过程,且非长按键
{
if(double_click_timerEN[i]==0) //可能双击按键的第一次，进入计时
{
double_click_timerEN[i]=1;
double_click_time[i]=0;
}
else //在计时范围内又按了一次
{
double_key_flag[i]=1;//双击情况
double_click_timerEN[i]=0;
}
judge_state[i]=0;
}
else if(key_state[i]==1&&key_time[i]>=70) judge_state[i]=0;//松开且是长按键
else
{
if (key_time[i]>=70)long_key_flag[i]=1;//长按键
key_time[i]++;//长按键计时 还没松开
}
break;
}
}
if(double_click_timerEN[i]==1)//延时确认是否双击
{
double_click_time[i]++;
if(double_click_time[i]>=35)
{
single_key_flag[i]=1;//按键1单次按下
double_click_timerEN[i]=0;
}
}
}
}
}
Nine. Summary
This is a small summary of the templates I searched from various places during my review, and I hope it will be useful for your reference.