STM32 library for 4 digits 7 segments indicators with 74HC595 shift register

This library is STM32 implementation of DIYables_4Digit7Segment_74HC595 Arduino library.

How to use:

1. Configure your SYS (Debug->Serial Wire) and RCC (HSE->Crystal/Ceramic Resonator)

2. Instead of SPI I use just GPIO pins, because I need SPI for another sensor. So, we need to configure GPIO:

   • Set PA9, PA10, PA11 as GPIO_Output with GPIO Pull-down for each of them.
   • Connect your sensor as: PA11 - SCLK, PA10 - RCLK, PA9 - DIO

3. Copy LED74HC595.h to Inc, and LED74HC595.c to Src

4. Include library in code and make LED74HC595 structure

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "LED74HC595.h"
/* USER CODE END Includes */

// ... 

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

// MAKE LED Structure
LED74HC595 ledStruct;

/* USER CODE END PV */
// ... 

5. Set up library

// ... 
int main(void)
{
    // ...
    /* USER CODE BEGIN 2 */
    
    // SETTING UP OF LIBRARY
    //                 SCLK PIN   SCLK Port   RCLK PIN   RCLK Port   DIO PIN   DIO PORT
    setUp(&ledStruct, GPIO_PIN_11,  GPIOA,    GPIO_PIN_10,  GPIOA,   GPIO_PIN_9,  GPIOA);
    
    /* USER CODE END 2 */

6. Write your code in while block. Print 195 int number on display. After printing you need to call loop(); function.

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    { 
        // PRINT INT NUMBERS
        //       NUMBER  ZERO PADDING
        printInt( 195,     false);
        loop();
        /* USER CODE END WHILE */

        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}
// ... 

7. The same way you can print float numbers. Instead of printInt you need to use printFloat

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    { 
        // PRINT FLOAT NUMBERS 3.14
        //         NUMBER   DECIMAL PLACE     ZERO PADDING
        printFloat( 3.14,        2,             false);
        loop();
        /* USER CODE END WHILE */

        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}
// ... 

8. Also you can set number at special place, you can use points and some symbols on this display:
   • __DASH (-)
   • __UNDERSCORE ( _ )
   • __C (C)
   • __E (E)
   • __F (F)
   • __DEGREE (°)

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    { 
        // PRINT 9.3°C TEMPERATURE
        clear();
        setNumber(1, 9);              // set 9 at the 1st digit
        setDot(1);                    // set . at the 1st digit
        setNumber(2, 3);              // set 3 at the 2nd digit
        setChar(3, __DEGREE);         // set ° at the 3rd digit
        setChar(4, __C);              // set C at the 4th digit
        show();            
        loop();
        /* USER CODE END WHILE */

        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}
// ... 

INT result	FLOAT result	Symbols result