init_gpio();

    // Init USB

    //Set_USBClock();

    //USB_Interrupts_Config();

    //USB_Init();

    GPIO_SetBits(LED_POWER);

    RCC_ClocksTypeDef RCC_Clocks;

    // SysTick end of count event each 1ms

    RCC_GetClocksFreq(&RCC_Clocks);

    SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);

    GPIO_ResetBits(LED_STAT);

    Delay(100);

    GPIO_SetBits(LED_POWER);

    Delay(500);

    GPIO_ResetBits(LED_POWER);

    init_spi();

    ssd1306_Init();

    ssd1306_DrawString("Hello World!", 0, 10);

  //  ssd1306_block_write();

    while(1)

   {  

        //ssd1306_block_write();

        // Process sensor inputs [TODO: 5hz?]

        process();

        // Run state machine [TODO: 50hz?]

        machine(); 

        // probably just passed the actual port

        // TODO: Grab buttonpresses with interrupts

        uint8_t sw_btn = GPIO_ReadInputDataBit(SW_BTN);

        uint8_t sw_up = GPIO_ReadInputDataBit(SW_UP);

        uint8_t sw_down = GPIO_ReadInputDataBit(SW_DOWN);

        uint8_t sw_left = GPIO_ReadInputDataBit(SW_LEFT);

        uint8_t sw_right = GPIO_ReadInputDataBit(SW_RIGHT);

        if(!sw_btn) {

            GPIO_ToggleBits(LED_STAT);

        }

        GPIO_SetBits(LED_POWER);

        Delay(50);

        GPIO_ResetBits(LED_POWER);

        Delay(50);

    }

}

int32_t temp = 0;

int32_t setpoint = 0;

int32_t p = 1;

int32_t i = 1;

int32_t d = 1;

// Process things

void process()

{

    // Read MAX temp sensor

    GPIO_ResetBits(MAX_CS);

    // Assert CS

    // This may not clock at all... might need to send 16 bits first

    uint8_t retval = 0;//SPI_I2S_ReceiveData(SPI2);

/*******************************************************************************

* File Name          : ssd1306.c

* Author             : lxyppc

* Version            : V1.0

* Date               : 10-01-21

* Description        : ssd1306 operations

*                      the SSH1101A is compatible with ssd1306

*******************************************************************************/

/* Includes ------------------------------------------------------------------*/

#include "stm32l100c_discovery.h"

#include "bsp.h"

#include "ssd1306.h"

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

#define   SSD1306_PAGE_NUMBER           8

#define   SSD1306_COLUMN_NUMBER         128

#define   SSD1306_COLUMN_MARGIN_START   2

#define   SSD1306_COLUMN_MARGIN_END     2

#define   SSD1306_X_PIXEL   128

#define   SSD1306_Y_PIXEL   32

/* Private macro -------------------------------------------------------------*/

#define   ssd1306_Buffer    (_SSD1306_Buffer + SSD1306_COLUMN_MARGIN_START)

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

static  uint8_t  _SSD1306_Buffer[SSD1306_COLUMN_NUMBER*SSD1306_PAGE_NUMBER + SSD1306_COLUMN_MARGIN_START + SSD1306_COLUMN_MARGIN_END] = {0};

static  uint8_t  pageIndex = 0;

static  uint8_t  iS_SSD_On = 0;

static  uint8_t  pre_on = 0;

static  uint8_t  curContrast = 0xCC;

static  uint8_t  lastContrast = 0xCC;

/* Private function prototypes -----------------------------------------------*/

void  WriteCommand(unsigned char command);

void  WriteData(unsigned char data);

#ifndef   ssd1306_H

#define   ssd1306_H

void  ssd1306_Init(void);

void  StartPageTransfer(void);

extern  const DeviceProp  ssd1306_Prop;

unsigned long ssd1306_DrawBlock(Pos_t x, Pos_t y, Pos_t cx, Pos_t cy, const unsigned char* data);

unsigned long ssd1306_IsOn(void);

unsigned long ssd1306_TurnOff(void);

unsigned long ssd1306_TurnOn(void);

unsigned char ssd1306_SetContrast(unsigned char contrast);

unsigned char ssd1306_GetContrast();

unsigned char* ssd1306_GetBuffer();

unsigned long ssd1306_DrawPoint(Pos_t x, Pos_t y, Color_t color);

void ssd1306_block_write(void);

void ssd1306_DrawChar(char ascii, unsigned char row, unsigned char xPos);

void ssd1306_DrawString(const char *dataPtr, unsigned char row, unsigned char xPos);

#endif