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[STM32 learning] (10) stm32f1 general timer realizes pulse counter
2022-07-24 09:51:00 【Use small materials】
STM32F1 General timer realizes pulse counter
adopt TIM3 Realize timing , I designed to count every second , Then in the digital tube （ Photoanode ） Displayed on the . Digital not only records pulses , You can also press the key to adjust ：
Key 1 Zero clearing
Key 2 Add one
Key 3 Minus one
Key 4 Select pause / To start Two functions
It should be noted that ： Key 1- Key 3 The function of must be in the key 4 Only when the pause function is selected , Other conditions fail .
connection ：
1.PE0 Pick up LED The lamp , Put it in the interrupt function , Play the prompt of interrupt execution
2. The data ports of the four nixie tubes are connected to PD8- PD15 The film selection ports are connected to PA0-PA3 mouth
3. The four keys are connected to PC0-PC4
The code is as follows ：
main.c
/*
Creation time ：2019.9.17
founder ： King boat
function ： Four nixie tubes display circularly 0000 - 9999
connection ：
Each digital tube is connected to PD8-PD15
Drive ports of four nixie tubes （com） They are connected to PA0-PA3
Implementation steps ：
The difference between common Yang and common Yin of digital tube
*/
#include "stm32f10x.h" // Device header
#include "led.h"
#include "key.h"
#include "delay.h"
#include "time.h"
int main(void)
{
GPIOD_init_wt();
GPIOA_init_wt();
GPIOC_Init_key();
GPIOE_init_led();
TIM3_Init(999,35999); // 0.5s T = (999+1)*(35999+1)/72MHz = 0.5s
while(1)
{
key_scan();
display();
}
}time.h
#include "stdint.h"
void TIM3_Init(uint16_t per,uint16_t psc);time.c
#include "stm32f10x_tim.h"
int temp = 1;
extern int cnt;
void TIM3_Init(uint16_t per,uint16_t psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitStruct;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
TIM_TimeBaseInitStructure.TIM_Period=per; // Auto load values
TIM_TimeBaseInitStructure.TIM_Prescaler=psc; // Division coefficient
TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; // Set up count mode
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
NVIC_InitStruct.NVIC_IRQChannel=TIM3_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=2;
NVIC_InitStruct.NVIC_IRQChannelSubPriority=3;
NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStruct);
TIM_Cmd(TIM3,ENABLE);
}
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update) == SET)
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
temp = (-1)*temp;
if(temp == -1)
{
GPIO_WriteBit(GPIOE, GPIO_Pin_0, Bit_SET);
cnt++;
if(cnt>9999)
{
cnt = 0;
}
}
else
{
GPIO_WriteBit(GPIOE, GPIO_Pin_0, Bit_RESET);
}
}
}
led.h
void GPIOD_init_wt(void);
void GPIOA_init_wt(void);
void GPIOE_init_led(void);
void display(void);
led.c
/*
Function name ：void GPIOA_init_wt(void)
No parameters ： No arguments
function ： Turn on GPIOA mouth
low 8 Bit push-pull output ,50MHz
founder ： King boat
Creation time ：2019.9.12
Function name ：void GPIOA_init_wt(int x)
No parameters ： Ginseng
function ： Turn on GPIOA mouth
low 8 Bit push-pull output ,50MHz
Modifier ： King boat
Job number ：0111001
Creation time ：2019.9.13
*/
#include "stm32f10x_gpio.h"
#include "delay.h"
unsigned short int table1[]={
0xc000,0xf900,0xa400,0xb000,
0x9900,0x9200,0x8200,0xf800,
0x8000,0x9000,0x8800,0x8300,
0xc600,0xa100,0x8600,0x8e00}; // Gongyang
unsigned short int table2[]={ // 0-F
0x3f00,0x0600,0x5b00,0x4f00,
0x6600,0x6d00,0x7d00,0x0700,
0x7f00,0x6f00,0x7700,0x7c00,
0x3900,0x5e00,0x7900,0x7100}; // Common Yin
int cnt; // Global variables , Count
//extern int flag; // Global variables , Marker bit
void GPIOD_init_wt(void)
{
GPIO_InitTypeDef GPIO_InitStruct; // GPIO Initialize structure
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD,ENABLE);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11
|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD,&GPIO_InitStruct);
}
void GPIOA_init_wt(void)
{
GPIO_InitTypeDef GPIO_InitStruct; // GPIO Initialize structure
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3; //0000 0000
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStruct);
}
void GPIOE_init_led(void)
{
GPIO_InitTypeDef GPIO_InitStruct; // GPIO Initialize structure
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE,ENABLE);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0; //0000 0000
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE,&GPIO_InitStruct);
}
/* Show 1234 */
/*void display(void)
{
GPIO_Write(GPIOA,0X000E); // Select the first digital tube 0000 0000 0000 1110
GPIO_Write(GPIOD,table1[1]); // Show 1
delay();
GPIO_Write(GPIOA,0X000D); // Select the first digital tube 0000 0000 0000 1101
GPIO_Write(GPIOD,table1[2]); // Show 1
delay();
GPIO_Write(GPIOA,0X000B); // Select the first digital tube 0000 0000 0000 1011
GPIO_Write(GPIOD,table1[3]); // Show 1
delay();
GPIO_Write(GPIOA,0X0007); // Select the first digital tube 0000 0000 0000 0111
GPIO_Write(GPIOD,table1[4]); // Show 1
delay();
}*/
/*
Digital tube dynamic display - 0000 - 9999
founder ： King boat
Method 1
*/
//void display(void)
//{
// int i,j,k,m,n; // Control a hundred thousand for
//
// for(m=0;m<10;m++)
// {
// for(k=0;k<10;k++)
// {
// for(j=0;j<10;j++)
// {
// for(i=0;i<10;i++)
// {
// for(n=0;n<10;n++) // Play the role of delay
// {
// GPIO_Write(GPIOA,0X000E); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[m]); // Show
// delay();
//
// GPIO_Write(GPIOA,0X000D); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[k]); // Show
// delay();
//
// GPIO_Write(GPIOA,0X000B); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[j]); // Show
// delay();
//
// GPIO_Write(GPIOA,0X0007); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[i]); // Show
// delay();
// }
//
// }
// }
// }
// }
//
//}
/*
Digital tube dynamic display - 0000 - 9999
founder ： King boat
Method 2
*/
//void display(void)
//{
// int cnt; // Count
// int i; // Loop variable
// int g,s,b,q;
// for(cnt=0;cnt<10000;cnt++)
// {
// g = cnt%10;
// s = cnt%100/10;
// b = cnt/100%10;
// q = cnt/1000;
// for(i=0;i<10;i++)
// {
// GPIO_Write(GPIOA,0X000E); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[q]); // Show
// delay();
//
// GPIO_Write(GPIOA,0X000D); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[b]); // Show
// delay();
//
// GPIO_Write(GPIOA,0X000B); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[s]); // Show
// delay();
//
// GPIO_Write(GPIOA,0X0007); // Select the first digital tube 0000 0000 0000 1110
// GPIO_Write(GPIOD,table1[g]); // Show
// delay();
// }
// }
//}
/*
Digital tube dynamic display - 0000 - 9999
founder ： King boat
Method 3
*/
void display(void )
{
int g,s,b,q;
// if(-1 == flag)
// {
//
// }
// else if(1 == flag)
// {
// cnt++;
// }
g = cnt%10;
s = cnt%100/10;
b = cnt/100%10;
q = cnt/1000;
GPIO_Write(GPIOA,0X000E); // Select the first digital tube 0000 0000 0000 1110
GPIO_Write(GPIOD,table1[q]); // Show
delay();
GPIO_Write(GPIOA,0X000D); // Select the first digital tube 0000 0000 0000 1101
GPIO_Write(GPIOD,table1[b]); // Show
delay();
GPIO_Write(GPIOA,0X000B); // Select the first digital tube 0000 0000 0000 1011
GPIO_Write(GPIOD,table1[s]); // Show
delay();
GPIO_Write(GPIOA,0X0007); // Select the first digital tube 0000 0000 0000 0111
GPIO_Write(GPIOD,table1[g]); // Show
delay();
}
key.h
void GPIOC_Init_key(void);
void key_scan(void);key.c
/*
Creation time ：2019.9.20
founder ： King boat
Modification time ：2019.9.23
connection ：key1-key4 They are connected to PC0-PC3
step ：
1. Turn on the clock
2. Set the working mode
3. Data input
*/
#include "stm32f10x_rcc.h"
#include "delay.h"
int flag=1; // Marker bit
extern int cnt;
void GPIOC_Init_key(void) // PC0-PC2
{
GPIO_InitTypeDef GPIO_InitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU ;
GPIO_Init(GPIOC,&GPIO_InitStruct);
}
void key_scan(void)
{
// key1
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_0) == 0 &&(-1 == flag))
{
delay_wt(); // Eliminate jitter
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_0) == 0 &&(-1 == flag))
{
cnt=0;
}
while(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_0) == 0); // Judge whether the key is released
}
// key2 Add 1 operation
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_1) == 0 &&(-1 == flag))
{
delay_wt(); // Eliminate jitter
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_1) == 0 &&(-1 == flag))
{
cnt++;
if(cnt>=10000)
{
cnt=0;
}
}
while(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_1) == 0); // Judge whether the key is released
}
// key3 reduce 1 operation
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_2) == 0 &&(-1 == flag))
{
delay_wt(); // Eliminate jitter
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_2) == 0 &&(-1 == flag))
{
cnt--;
if(cnt<0)
{
cnt=9999;
}
}
while(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_2) == 0); // Judge whether the key is released
}
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_3) == 0)
{
delay_wt(); // Eliminate jitter
if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_3) == 0)
{
flag = (-1)*flag;
if(flag == 1)
{
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
//TIM_Cmd(TIM3, ENABLE);
}
else
{
TIM_ITConfig(TIM3,TIM_IT_Update,DISABLE);
//TIM_Cmd(TIM3, DISABLE);
}
}
while(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_3) == 0); // Judge whether the key is released
}
}
delay.h
void delay(void); // Function declaration
void delay_wt(void);delay.c
void delay(void)
{
int i,j;
for(i=0;i<100;i++)
{
for(j=0;j<400;j++);
}
}
void delay_wt(void)
{
int i,j;
for(i=0;i<100;i++)
{
for(j=0;j<400;j++);
}
}
The effect is as follows ：
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