void Minimal_EEPROM_Unlock(void)

{

  if((FLASH->PECR & FLASH_PECR_PELOCK) != RESET)

  {

    /* Unlocking the Data memory and FLASH_PECR register access*/

    FLASH->PEKEYR = FLASH_PEKEY1;

    FLASH->PEKEYR = FLASH_PEKEY2;

  }

}

void Minimal_EEPROM_Lock(void)

{

  /* Set the PELOCK Bit to lock the data memory and FLASH_PECR register access */

  FLASH->PECR |= FLASH_PECR_PELOCK;

}

FLASH_Status Minimal_FLASH_GetStatus(void)

{

  FLASH_Status FLASHstatus = FLASH_COMPLETE;

  if((FLASH->SR & FLASH_FLAG_BSY) == FLASH_FLAG_BSY)

  {

    FLASHstatus = FLASH_BUSY;

#include "gpio.h"

#include "config.h"

extern volatile uint32_t ticks;

// Increase on each press, and increase at a fast rate after duration elapsed of continuously holding down... somehow...

uint32_t change_time_reset = 0;

void user_input(uint16_t* to_modify)

{

    if(CHANGE_ELAPSED) {

        if(!GPIO_ReadInputDataBit(SW_UP) ) {

            CHANGE_RESET;

            (*to_modify)++;

        }

        else if(!GPIO_ReadInputDataBit(SW_DOWN) && (*to_modify) > 0) {

            CHANGE_RESET;

            (*to_modify)--;

        }

    }

}

void init_gpio(void) {

void init_spi(void)

{

    SPI_InitTypeDef  SPI_InitStructure;

    // OLED IC

    SPI_Cmd(SPI1, DISABLE); 

    SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;

    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;

    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;

    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;

    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;

    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;

    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;

    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

    SPI_InitStructure.SPI_CRCPolynomial = 7;

    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);           /* Enable the SPI  */   

    // MAX IC

    SPI_Cmd(SPI2, DISABLE); 

    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;

    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;

#include "ssd1306.h"

// Write command to OLED

void WriteCommand(unsigned char command)

{

  SSD_A0_Low();

  SPI_SendByte(command);

  SPI_Wait();

}

// Write data to OLED

void WriteData(unsigned char data)

{

  SSD_A0_High();

  SPI_SendByte(data);

  SPI_Wait();

}

// Initialize OLED

void ssd1306_Init(void)

{

  /* Generate a reset */

  SSD_Reset_Low();