STM32_BareMetal_Libraries

Table of contents

1. About
2. How to use Libraries
   2.1 GPIO
   2.2 ADC
   2.3 Delay
   2.4 Lcd16x2
   2.5 KeyPad

About

There you can find Libraries for your STM32 projects that is written in bare-metal method.
I'm still working on this ...

currently you can find these libraries in my repository:

• aryana_GPIO.h
• aryana_ADC.h
• aryana_SysTickDelay.h
• aryana_LCD16x2_4bit.h
• aryana_Keypad4x4.h

In the following ,you can find the instructions about each libraries that i wrote. so fill free to look at them ...

How to use Libraries

at first , you must include your propper stm32fyxx.h library to your project.
( for example if you use stm32f401re you should include stm32f4xx.h)

GPIO

• this library has the following functions:

1. enable Portx's clock

aryana_GPIOx_Enable(char PortName) 

2. Set Port x Pin i as Input

 aryana_GPIOx_PINiSetMode_INPUT(char PortName,unsigned int pin)

3. Set Port x Pin i as Output

aryana_GPIOx_PINiSetMode_OUT(char PortName,unsigned int pin) 

4. Set Port x Pin i Low (0)

 aryana_GPIOx_PINi_Low(char PortName,unsigned int pin)

5. Set Port x Pin i High (1)

aryana_GPIOx_PINi_High(char PortName,unsigned int pin)

6. set value of Port x pin i 0 or 1

aryana_GPIOx_PINi_Write(char PortName,unsigned int pin,int bit)

7. read entire Portx's value and write it to {int* PortInputValue_Array}

aryana_GPIOx_Read(char PortName,int* PortInputValue_Array)

• HOW TO USE

1. enable GPIOx by aryana_GPIOx_Enable(char PortName)
2. set GPIOx Pin i as input or out put
3. use any funtcion as you need... :)

• GPIO example Blinking LED

#include <stm32f4xx.h>
#include <aryana_GPIO.h>

#define LED_PORT 'A'
#define LED_PIN 2


int main(void)
{
  aryana_GPIOx_Enable(LED_PORT) ;
  aryana_GPIOx_PINiSetMode_OUT(LED_PORT,LED_PIN)'
  while(1)
  {
      aryana_GPIOx_PINi_High(LED_PORT,LED_PIN);
      for(int i=0;i<6000 <i++);
      aryana_GPIOx_PINi_LOW(LED_PORT,LED_PIN);
      for(int i=0;i<6000 <i++);
  }
}

ADC

Delay

• this library has the following functions:

sysTickDelay_ms(int delay_ms)

sysTickDelay_us(int delay_us)

Lcd16x2

• this library has the following functions:

1. config LCD's GPIO pins and turn it on in 4 bit mod

LCD_Initialaze();

2. send command to LCD

LCD_command(unsigned char command);

3. send single character to LCD

LCD_data_Character(unsigned char command)

4.send string to LCD

 LCD_data_String(char string[]);

• HOW TO USE

1. first edit the following macros to match the Hardware

#define LCD_port 'A'
#define LCD_RS_pin 4
#define LCD_RW_pin 5
#define LCD_EN_pin 6

2. use LCD_Initialize() function to config GPIO and Run LCD in 4 bit mode
3. use LCD_command or LCD_Data functions as you wish... :)

KeyPad

this library has the following functions:

1. initialize KeyPad

KeyPad_Init(void) 

2. listen to the KeyPad . if any keys is pressed by the user , KeyPad_flag will become 1 .

KeyPad_Listen_InsideLoop()

3.find the Row And Col of the Keypad's key that is pressed. the row and col value is stord in these variables : int KeyPad_PressedRow int KeyPad_PressedCol
*use this function after KeyPad_Listen_InsideLoop() as the example .

KeyPad_RowColFinder()

• HOW TO USE

1. first edit the following macros and array to match the Hardware

#define KeyPad_port 'C'  // 'A' or 'B' or 'C' or 'D'
#define KeyPad_row1Pin 0
#define KeyPad_row2Pin 1
#define KeyPad_row3Pin 2
#define KeyPad_row4Pin 3

#define KeyPad_col1Pin 4
#define KeyPad_col2Pin 5
#define KeyPad_col3Pin 6
#define KeyPad_col4Pin 7


char KeyPad_ArrayCharacters[16] = {'1', '2', '3', 'A',
                                   '4', '5', '6', 'B',
                                   '7', '8', '9', 'C',
                                   '*', '0', '#', 'D'};

2. initialize KeyPad

KeyPad_Init(void) 

3. do as the following example.

example

#include <stm32f4xx.h>
     #include "aryana_GPIO.h"
     #include "aryana_SysTickDelay.h"
     #include "aryana_Keypad4x4.h"
     #include "aryana_LCD16x2_4bit.h"
     int main()
     {
          LCD_Initialaze();
          KeyPad_Init();
          while (1)
          {
               KeyPad_Listen_InsideLoop();
               KeyPad_RowColFinder();
               //now col and row is been found ... do your things....
               if(KeyPad_flag==1){
                    LCD_data_Character(KeyPad_ArrayCharacters[(4*KeyPad_PressedRow) + (KeyPad_PressedCol)]);
                    KeyPad_flag=0;
                    sysTickDelay_ms(2000);
               }
               ////-----------------------------------------------
               KeyPad_ResetPins();
          }
     }