# STM32F0xx Makefile

# #####################################

#

# Part of the uCtools project

# uctools.github.com

#

#######################################

# user configuration:

#######################################

# SOURCES: list of sources in the user application

# TARGET: name of the user application

TARGET = main

# BUILD_DIR: directory to place output files in

BUILD_DIR = build

# LD_SCRIPT: location of the linker script

LD_SCRIPT = stm32f042c6_flash.ld

# USER_DEFS user defined macros

USER_DEFS = -D HSI48_VALUE=48000000 -D HSE_VALUE=16000000

# USER_INCLUDES: user defined includes

USER_INCLUDES =

# USB_INCLUDES: includes for the usb library

USB_INCLUDES = -Imiddlewares/ST/STM32_USB_Device_Library/Core/Inc

USB_INCLUDES += -Imiddlewares/ST/STM32_USB_Device_Library/Class/CDC/Inc

# USER_CFLAGS: user C flags (enable warnings, enable debug info)

USER_CFLAGS = -Wall -g -ffunction-sections -fdata-sections -Os

# USER_LDFLAGS:  user LD flags

USER_LDFLAGS = -fno-exceptions -ffunction-sections -fdata-sections -Wl,--gc-sections

# TARGET_DEVICE: device to compile for

TARGET_DEVICE = STM32F042x6

#######################################

# end of user configuration

#######################################

#

#######################################

# binaries

#######################################

CC = arm-none-eabi-gcc

AR = arm-none-eabi-ar

RANLIB = arm-none-eabi-ranlib

SIZE = arm-none-eabi-size

OBJCOPY = arm-none-eabi-objcopy

MKDIR = mkdir -p

#######################################

# core and CPU type for Cortex M0

# ARM core type (CORE_M0, CORE_M3)

CORE = CORE_M0

# ARM CPU type (cortex-m0, cortex-m3)

CPU = cortex-m0

#ifndef CONFIG_H

#define CONFIG_H

// Temperature sensor type

#define MAX31855_TC_SENSOR

//#define MAX31865_RTD_SENSOR

// Virtual serial port transmit rate

#define VCP_TX_FREQ 1000

// Solid-state relay maximum on-time

#define SSR_PERIOD 200

// Interval of PID calculations

#define PID_PERIOD 120

// Pin settings

#define LED_POWER GPIOF,GPIO_PIN_0

#define MAX_CS GPIOA,GPIO_PIN_15

#define SW_BTN  GPIOB, GPIO_PIN_4

#define SW_UP   GPIOB, GPIO_PIN_7

#define SW_DOWN GPIOB, GPIO_PIN_3

#define SW_LEFT GPIOB, GPIO_PIN_5

#define SW_RIGHT GPIOB, GPIO_PIN_6

#define SSR_PIN GPIOA, GPIO_PIN_1

#endif

// vim:softtabstop=4 shiftwidth=4 expandtab 

#include "stm32f0xx_hal.h"

#include "ssd1306.h"

#include "stringhelpers.h"

#include "display.h"

#include "config.h"

#include "states.h"

#include "flash.h"

#include "gpio.h"

uint8_t goto_mode = 2;

// State machine

uint8_t sw_btn_last = 0;

uint8_t sw_up_last = 0;

uint8_t sw_down_last = 0;

uint8_t sw_left_last = 0;

uint8_t sw_right_last = 0;

#define SW_BTN_PRESSED (sw_btn_last == 0 && sw_btn == 1) // rising edge on buttonpress

#define SW_UP_PRESSED (sw_up_last == 0 && sw_up == 1)

#define SW_DOWN_PRESSED (sw_down_last == 0 && sw_down == 1)

#define SW_LEFT_PRESSED (sw_left_last == 0 && sw_left == 1)

#define SW_RIGHT_PRESSED (sw_right_last == 0 && sw_right == 1)

///////////////////////////////////////////////////////////////////////////////////////

/// freaking multiple setpoint support ///

uint8_t step_duration[10] = {0,0,0,0,0,0,0,0,0,0};

int16_t step_setpoint[10] = {0,0,0,0,0,0,0,0,0,0};

uint8_t final_setpoint = 0;

// Multiple screens to set setpoint and duration on each screen

// press center to go to the next one, and press left or right or something to confirm

// When executing, complete on time AND(?) temperature. Maybe allow switching to OR via settings

////////////////////////////////////////////////////////////////////////////////////////////////

uint8_t trigger_drawsetpoint = 1;

int16_t last_temp = 21245;

void display_process(therm_settings_t* set, therm_status_t* status)

{

    uint8_t last_state = status->state;

    uint8_t temp_changed = status->temp != last_temp;

    last_temp = status->temp;

    uint8_t sw_btn = !HAL_GPIO_ReadPin(SW_BTN);

    uint8_t sw_up = !HAL_GPIO_ReadPin(SW_UP);

    uint8_t sw_down = !HAL_GPIO_ReadPin(SW_DOWN);

    uint8_t sw_left = !HAL_GPIO_ReadPin(SW_LEFT);

    uint8_t sw_right = !HAL_GPIO_ReadPin(SW_RIGHT);

#include "stm32f0xx_hal.h"

#include "config.h"

#include "states.h"

#include "ssd1306.h"

#include "max31855.h"

#include "gpio.h"

#include "spi.h"

#include "flash.h"

#include "stringhelpers.h"

#include "display.h"

#include "storage.h"

#include "usb_device.h"

#include "usbd_cdc_if.h"

// Prototypes

void process();

therm_settings_t set;

therm_status_t status;

// Globalish setting vars

SPI_HandleTypeDef hspi1;

static __IO uint32_t TimingDelay;

void deinit(void)

{

    HAL_DeInit();

}

volatile int i=0;

int main(void)

{

    void bootloader_unset(void);

    init_gpio();

    MX_USB_DEVICE_Init();

//    set.usb_plugged = 

    // USB startup delay

    HAL_Delay(1000);

    HAL_GPIO_WritePin(LED_POWER, 1);

    if(!HAL_GPIO_ReadPin(SW_UP))

    // Init SPI busses

    init_spi();

    // Init OLED over SPI

    ssd1306_Init();

    ssd1306_clearscreen();

    // Default settings 

    set.boottobrew = 0;

    set.temp_units = TEMP_UNITS_CELSIUS;

    set.windup_guard = 1;

    set.k_p = 1;

    set.k_i = 1;

    set.k_d = 1;

    set.ignore_tc_error = 0;

    set.setpoint_brew = 0;

    set.setpoint_steam = 0;

    // Default status

    status.temp = 0;

    status.temp_frac = 0;

    status.state_resume = 0;

    status.state = STATE_IDLE;

    status.setpoint = 0;

    status.pid_enabled = 0;

    // Load settings (if any) from EEPROM

    restore_settings(&set);

    // Go to brew instead of idle if configured thusly

    if(set.boottobrew)

      status.state = STATE_PREHEAT_BREW; 

    // Startup screen 

    ssd1306_DrawString("therm v0.2", 1, 40);

    ssd1306_DrawString("protofusion.org/therm", 3, 0);

    HAL_Delay(1500);

    flash_init(&set);

    HAL_Delay(1500);

    ssd1306_clearscreen();

    // Main loop

    while(1)

    {

        // Process sensor inputs

        process();

        // Run state machine

        display_process(&set, &status); 

    }

}

// PID implementation

// TODO: Make struct that has the last_temp and i_state in it, pass by ref. Make struct that has other input values maybe.

int16_t last_pid_temp = 0;

uint8_t last_pid_temp_frac = 0;

int32_t i_state = 0;

int16_t update_pid(uint16_t k_p, uint16_t k_i, uint16_t k_d, int16_t temp, uint8_t temp_frac, int16_t setpoint) 

{

  // Calculate instantaneous error

  int16_t error = setpoint - temp; // TODO: Use fixed point fraction

  // Proportional component

  int32_t p_term = k_p * error;

  // Error accumulator (integrator)

  i_state += error;

  // to prevent the iTerm getting huge from lots of 

  //  error, we use a "windup guard" 

  // (this happens when the machine is first turned on and

  // it cant help be cold despite its best efforts)

  // not necessary, but this makes windup guard values 

  // relative to the current iGain

  int32_t windup_guard_res = set.windup_guard / k_i;  

  // Calculate integral term with windup guard 

  if (i_state > windup_guard_res) 

    i_state = windup_guard_res;

  else if (i_state < -windup_guard_res) 

    i_state = -windup_guard_res;

  int32_t i_term = k_i * i_state;

  // Calculate differential term (slope since last iteration)

  int32_t d_term = (k_d * (status.temp - last_pid_temp));

  // Save temperature for next iteration

  last_pid_temp = status.temp;

  last_pid_temp_frac = status.temp_frac;

  int16_t result = p_term + i_term - d_term;

  // Put out tenths of percent, 0-1000. 

  if(result > 1000)

    result = 1000;

  else if(result < -1000)

    result = -1000;

        status.state = STATE_TC_ERROR;

        status.temp = 0;

        status.temp_frac = 0;

    }*/

    else 

    {

        //if(status.state == STATE_TC_ERROR)

        //{

        //    status.state = status.state_resume;

        //    ssd1306_clearscreen();

        //}

        uint8_t sign = status->temp >> 15;// top bit is sign

        temp_pre = temp_pre >> 2; // Drop 2 lowest bits

        status->temp_frac = temp_pre & 0b11; // get fractional part

        status->temp_frac *= 25; // each bit is .25 a degree, up to fixed point

        temp_pre = temp_pre >> 2; // Drop 2 fractional bits 

        int8_t signint;

        if(sign) {

            signint = -1;

        }

        else {

            signint = 1;

        }

        // Convert to Fahrenheit

        if(set->temp_units == TEMP_UNITS_FAHRENHEIT)

        {

            status->temp = signint * ((temp_pre*100) + status->temp_frac);

            status->temp = status->temp * 1.8;

            status->temp += 3200;

            status->temp_frac = status->temp % 100;

            status->temp /= 100;

            status->temp += set->temp_offset;

        }

        // Use Celsius values

        else

        {

            status->temp = temp_pre * signint;

            status->temp += set->temp_offset;

        }

    }

}

#ifndef MAX31855_H

#define MAX31855_H

void max31855_readtemp(SPI_HandleTypeDef* hspi1, therm_settings_t* set, therm_status_t* status);

#endif

    FLASH_OBProgramInitTypeDef OBParam;

    HAL_FLASHEx_OBGetConfig(&OBParam);

    if(OBParam.USERConfig != 0xFF)

    {

        OBParam.OptionType = OPTIONBYTE_USER;

        OBParam.USERConfig = 0xFF;

        HAL_FLASH_Unlock();

        HAL_FLASH_OB_Unlock();

        HAL_FLASHEx_OBErase();

        HAL_FLASHEx_OBProgram(&OBParam);

        HAL_FLASH_OB_Lock();

        HAL_FLASH_OB_Launch();

    }

}

// See thread: https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https%3a%2f%2fmy.st.com%2fpublic%2fSTe2ecommunities%2fmcu%2fLists%2fcortex_mx_stm32%2fJump%20to%20USB%20DFU%20Bootloader%20in%20startup%20code%20on%20STM32F042&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=185

// Set option bytes to enter bootloader upon reset

void bootloader_enter(void) {

    FLASH_OBProgramInitTypeDef OBParam;

    HAL_FLASHEx_OBGetConfig(&OBParam);

    // FIXME TODO: CHECK THESE OPTION BYTES, he was using an F1 processor. What about the switch flag?

    OBParam.OptionType = OPTIONBYTE_USER;

    /*Reset NBOOT0 and BOOT_SEL,  see: RM 2.5 Boot configuration*/

    OBParam.USERConfig = 0x77; //Sorry for magic number :)

    HAL_FLASH_Unlock();

    HAL_FLASH_OB_Unlock();

    HAL_FLASHEx_OBErase();

    HAL_FLASHEx_OBProgram(&OBParam);

    HAL_FLASH_OB_Lock();

    HAL_FLASH_Lock();

    HAL_FLASH_OB_Launch();

}

#ifndef BOOTLIB_H

#define BOOTLIB_H

void bootloader_unset(void);

void bootloader_enter(void);

#endif

  *

  * COPYRIGHT(c) 2014 STMicroelectronics

  *

  * Redistribution and use in source and binary forms, with or without modification,

  * are permitted provided that the following conditions are met:

  * 1. Redistributions of source code must retain the above copyright notice,

  * this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright notice,

  * this list of conditions and the following disclaimer in the documentation

  * and/or other materials provided with the distribution.

  * 3. Neither the name of STMicroelectronics nor the names of its contributors

  * may be used to endorse or promote products derived from this software

  * without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  *

  ******************************************************************************

*/

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

#include "stm32f0xx.h"

#include "stm32f0xx_hal.h"

#include "usbd_def.h"

#include "usbd_core.h"

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

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

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

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

PCD_HandleTypeDef hpcd_USB_FS;

/* USER CODE BEGIN 0 */

__IO uint32_t remotewakeupon=0;

/* USER CODE END 0 */

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

/* Private functions ---------------------------------------------------------*/

/* USER CODE BEGIN 1 */

static void SystemClockConfig_Resume(void);

/* USER CODE END 1 */

void HAL_PCDEx_SetConnectionState(PCD_HandleTypeDef *hpcd, uint8_t state);

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

		       LL Driver Callbacks (PCD -> USB Device Library)

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

/* MSP Init */

void HAL_PCD_MspInit(PCD_HandleTypeDef* hpcd)

{

  if(hpcd->Instance==USB)

  {

  /* USER CODE BEGIN USB_MspInit 0 */

  /* USER CODE END USB_MspInit 0 */

    /* Peripheral clock enable */

    __USB_CLK_ENABLE();

    HAL_NVIC_SetPriority(USB_IRQn, 0, 0);

    HAL_NVIC_EnableIRQ(USB_IRQn);

  /* USER CODE BEGIN USB_MspInit 1 */

  /* USER CODE END USB_MspInit 1 */

  }

}

void HAL_PCD_MspDeInit(PCD_HandleTypeDef* hpcd)

{

  if(hpcd->Instance==USB)

  {

  /* USER CODE BEGIN USB_MspDeInit 0 */

  /* USER CODE END USB_MspDeInit 0 */

    /* Peripheral clock disable */

    __USB_CLK_DISABLE();

    /* Peripheral interrupt Deinit*/

    HAL_NVIC_DisableIRQ(USB_IRQn);

  /* USER CODE BEGIN USB_MspDeInit 1 */

  /* USER CODE END USB_MspDeInit 1 */

  }

}

/**

  * @brief  Setup stage callback

  * @param  hpcd: PCD handle

  * @retval None

  */

void HAL_PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd)

  * @param  ep_addr: Endpoint Number

  * @retval Recived Data Size

  */

uint32_t USBD_LL_GetRxDataSize  (USBD_HandleTypeDef *pdev, uint8_t  ep_addr)

{

  return HAL_PCD_EP_GetRxCount(pdev->pData, ep_addr);

}

/**

  * @brief  Delays routine for the USB Device Library.

  * @param  Delay: Delay in ms

  * @retval None

  */

void  USBD_LL_Delay (uint32_t Delay)

{

  HAL_Delay(Delay);

}

/**

  * @brief  static single allocation.

  * @param  size: size of allocated memory

  * @retval None

  */

void *USBD_static_malloc(uint32_t size)

{

  static uint32_t mem[MAX_STATIC_ALLOC_SIZE];

  return mem;

}

/**

  * @brief  Dummy memory free

  * @param  *p pointer to allocated  memory address

  * @retval None

  */

void USBD_static_free(void *p)

{

}

/* USER CODE BEGIN 4 */

/**

  * @brief  Configures system clock after wake-up from USB Resume CallBack:

  *         enable HSI, PLL and select PLL as system clock source.

  * @param  None

  * @retval None

  */

static void SystemClockConfig_Resume(void)

{

}

/* USER CODE END 4 */

/**

* @brief Software Device Connection

* @param hpcd: PCD handle

* @param state: connection state (0 : disconnected / 1: connected)

* @retval None

*/

void HAL_PCDEx_SetConnectionState(PCD_HandleTypeDef *hpcd, uint8_t state)

{

/* USER CODE BEGIN 5 */

  if (state == 1)

  {

    /* Configure Low Connection State */

  }

  else

  {

    /* Configure High Connection State */

  }

/* USER CODE END 5 */

}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/