STM32 expansion board digital tube display

Let's look at the schematic first

 

Nixie tube is made of 74HC595 Driven .

14 foot ：DS： Serial data input pin

13 foot ：OE： Output enable control pin , Low level enable output , So grounding

12 foot ：ST_CP(RCK)： The memory stores the clock pin , On the rising edge , Data is transferred from shift register to storage register

11 foot ：SH_CP(SCK)： Shift register clock pin , On the rising edge , The data in the shift register is shifted back as a whole , And accept new data （ from DS Input ）

10 foot ：MR： Low level active , Clear the existing data in the shift register , Generally do not use , Connect to high level

9 foot ：Q7’： Serial data output , Cascade output , Next 595 Of DS End （ When the data in the shift register is more than 8 position , Will put the existing bits “ Squeeze out ”）

1-7 foot ,15 foot ： Parallel output pin

seg.c

#include "seg.h"

uint8_t seg_table[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};

void DisplayValue(uint8_t value1,uint8_t value2,uint8_t value3)
{
	uint8_t i = 0;
	uint8_t value = 0;	
	
	RCLK_L;  //ST_CP
	
	value = seg_table[value3];
	for(i = 0; i < 8; i++)
	{
		SCK_L;//SH_CP
		
		if(value & 0x80)
		{
			SER_H;//DS
		}
		else
		{
			SER_L;
		}
		value <<= 1;
		SCK_H;
	}
	
	value = seg_table[value2];
	for(i = 0; i < 8; i++)
	{
		SCK_L;
		if(value & 0x80)
		{
			SER_H;
		}
		else
		{
			SER_L;
		}
		value <<= 1;
		SCK_H;
		
	}
	
	value = seg_table[value1];
	for(i = 0; i < 8; i++)
	{
		SCK_L;
		if(value & 0x80)
		{
			SER_H;
		}
		else
		{
			SER_L;
		}
		value <<= 1;
		SCK_H;
		
	}
	RCLK_H;
}

seg.h

#ifndef _SEG_H_
#define _SEG_H_

#include "main.h"

#define RCLK_PIN GPIO_PIN_2
#define RCLK_PORT GPIOA
#define SER_PIN GPIO_PIN_1
#define SER_PORT GPIOA
#define SCK_PIN GPIO_PIN_3
#define SCK_PORT GPIOA

#define RCLK_H HAL_GPIO_WritePin(RCLK_PORT,RCLK_PIN,GPIO_PIN_SET);
#define RCLK_L HAL_GPIO_WritePin(RCLK_PORT,RCLK_PIN,GPIO_PIN_RESET);

#define SER_H HAL_GPIO_WritePin(SER_PORT,SER_PIN,GPIO_PIN_SET);
#define SER_L HAL_GPIO_WritePin(SER_PORT,SER_PIN,GPIO_PIN_RESET);

#define SCK_H HAL_GPIO_WritePin(SCK_PORT,SCK_PIN,GPIO_PIN_SET);
#define SCK_L HAL_GPIO_WritePin(SCK_PORT,SCK_PIN,GPIO_PIN_RESET);

void DisplayValue(uint8_t value1,uint8_t value2,uint8_t value3);

#endif