# 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

            // Write text to OLED

            // [ therm :: set windup ]

            // [ g = 12         ]

            ssd1306_DrawString("Units: ", 0, 40);

            ssd1306_drawlogo();

            if(set->temp_units == TEMP_UNITS_FAHRENHEIT)

                ssd1306_DrawString("Fahrenheit", 1, 60);

            else

                ssd1306_DrawString("Celsius   ", 1, 60);

            ssd1306_DrawString("Press to accept", 3, 40);

            // Button handler

            if(SW_BTN_PRESSED) {

                status->state = STATE_SETTEMPOFFSET;

            }

            else if(!HAL_GPIO_ReadPin(SW_UP)) {

                set->temp_units = TEMP_UNITS_FAHRENHEIT;

            }

            else if(!HAL_GPIO_ReadPin(SW_DOWN)) {

                set->temp_units = TEMP_UNITS_CELSIUS;

            }

            // Event Handler

            // N/A

        } break;

        case STATE_SETTEMPOFFSET:

        {

            // Write text to OLED

            // [ therm :: set temp offset ]

            // [ g = 12         ]

            ssd1306_DrawString("Thermocouple Offset", 0, 40);

            ssd1306_drawlogo();

            char tempstr[6];

            itoa(set->temp_offset, tempstr, 10);

            ssd1306_DrawString("O=", 1, 45);

            ssd1306_DrawString("    ", 1, 57);

            ssd1306_DrawString(tempstr, 1, 57);

            ssd1306_DrawString("Press to accept", 3, 40);

            // Button handler

            if(SW_BTN_PRESSED) {

                status->state = STATE_IDLE;

            }

            else {

                user_input_signed(&set->temp_offset);

            }

            // Event Handler

            // N/A

        } break;

        case STATE_PREHEAT_BREW:

        {

            // Write text to OLED

            // [ therm : preheating brew ]

            // [ 30 => 120 C             ]

            ssd1306_DrawString("Preheating...", 0, 0);

            //ssd1306_drawlogo();

            draw_setpoint(status);

            status->pid_enabled = 1;

	    status->setpoint = set->setpoint_brew;

            // Button handler

            if(SW_BTN_PRESSED) {

                status->state = STATE_IDLE;

            }

            else {

                user_input(&set->setpoint_brew);

            }

            // Event Handler

            if(status->temp >= status->setpoint) {

                status->state = STATE_MAINTAIN_BREW;

            }

        } break;

        case STATE_MAINTAIN_BREW:

        {

            // Write text to OLED

            // [ therm : ready to brew ]

            // [ 30 => 120 C           ]

            ssd1306_DrawString("Preheated!", 0, 0);

            //ssd1306_drawlogo();

            draw_setpoint(status);

            status->pid_enabled = 1;

	    status->setpoint = set->setpoint_brew;

            // Button handler

            if(SW_BTN_PRESSED) {

                status->state = STATE_IDLE;

            }

            else {

                user_input(&set->setpoint_brew);

            }

            // Event Handler

            // N/A

        } break;

        case STATE_PREHEAT_STEAM:

        {

            // Write text to OLED

            // [ therm : preheating steam ]

            // [ 30 => 120 C           ]

            ssd1306_DrawString("Preheating...", 0, 0);

            //ssd1306_drawlogo();

            draw_setpoint(status);

            status->pid_enabled = 1;

	    status->setpoint = set->setpoint_steam;

            // Button handler

            if(SW_BTN_PRESSED) {

                status->state = STATE_IDLE;

            }

            else {

                user_input(&set->setpoint_steam);

            }

            // Event Handler

            if(status->temp >= status->setpoint) {

                status->state = STATE_MAINTAIN_STEAM;

            }

        } break;

        case STATE_MAINTAIN_STEAM:

        {

            // Write text to OLED

            // [ therm : ready to steam ]

            // [ 30 => 120 C            ]

            ssd1306_DrawString("Ready to Steam!", 0, 0);

            //ssd1306_drawlogo();

            draw_setpoint(status);

            status->pid_enabled = 1;

	    status->setpoint = set->setpoint_steam;

            // Button handler

            if(SW_BTN_PRESSED) {

                status->state = STATE_IDLE;

            }

            else {

                user_input(&set->setpoint_steam);

            }

            // Event Handler

            // N/A

        } break;

        case STATE_TC_ERROR:

        {

            // Write text to OLED

            // [ therm : ready to steam ]

            // [ 30 => 120 C            ]

            ssd1306_DrawString("Error:", 0, 0);

            if(status->tc_errno == 1)

                ssd1306_DrawString("#1, Check Sensor", 1, 0);

            else if(status->tc_errno == 4)

                ssd1306_DrawString("#4, Check Sensor", 1, 0);

            else

                ssd1306_DrawString("#?, Unknown Error", 1, 0);

            ssd1306_DrawString("Press -> to ignore", 3, 0);

            // Button handler

            if(SW_BTN_PRESSED) {

                status->state = STATE_IDLE;

            }

            else if(SW_RIGHT_PRESSED) {

                set->ignore_tc_error = 1;

                status->state = STATE_IDLE;

            }

            // Event Handler

            // Maybe handle if TC is plugged in

            // N/A

        } break;

        // Something is terribly wrong

        default:

        {

            status->state = STATE_IDLE;

            status->pid_enabled = 0;

        } break;

#include "stm32f0xx_hal.h"

#include "config.h"

#include "states.h"

#include "ssd1306.h"

#include "gpio.h"

#include "spi.h"

#include "stringhelpers.h"

#include "display.h"

#include "usb_device.h"

#include "usbd_cdc_if.h"

// Prototypes

// Move to header file

void process();

void SystemClock_Config(void);

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)

{

    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

    HAL_Init();

    /* Configure the system clock */

    SystemClock_Config();

    /* Unset bootloader option bytes (if set) */

    void bootloader_unset(void);

    /* Initialize all configured peripherals */

    init_gpio();

    MX_USB_DEVICE_Init();

    // USB startup delay

    HAL_Delay(1000);

    HAL_GPIO_WritePin(LED_POWER, 1);

    // TODO: Awesome pwm of power LED 

    // Configure 1ms SysTick (change if more temporal resolution needed) 

    //RCC_ClocksTypeDef RCC_Clocks;

    //RCC_GetClocksFreq(&RCC_Clocks);

    //SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);

    // 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

    // 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);

    ssd1306_clearscreen();

    // Main loop

    while(1)

    {

        // Process sensor inputs

        process();

        // Run state machine

        display_process(&set, &status); 

    }

}

// Clock configuration

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  RCC_PeriphCLKInitTypeDef PeriphClkInit;

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;

  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;

  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;

  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);

  __SYSCFG_CLK_ENABLE();

    if((ticks - last_ssr_on > SSR_PERIOD))

    {

        if(status.pid_enabled) 

        {

            // Get ssr output for next time

            int16_t power_percent = update_pid(set.k_p, set.k_i, set.k_d, status.temp, status.temp_frac, status.setpoint);

            //power-percent is 0-1000

            ssr_output = power_percent; //(((uint32_t)SSR_PERIOD * (uint32_t)10 * (uint32_t)100) * power_percent) / (uint32_t)1000000;

        }

        else 

        {

            ssr_output = 0;

        }

        // Only support heating (ssr_output > 0) right now

        if(ssr_output > 0) {

            char tempstr[6];

            itoa(ssr_output, tempstr, 10);

            ssd1306_DrawString(tempstr, 0, 90);

            HAL_GPIO_WritePin(SSR_PIN, 1);

            last_ssr_on = ticks;

        }

    }

    // Kill SSR after elapsed period less than SSR_PERIOD 

    if(ticks - last_ssr_on > ssr_output || ssr_output == 0)

    {

        HAL_GPIO_WritePin(SSR_PIN, 0);

    }

    if(ticks - last_vcp_tx > VCP_TX_FREQ)

    {

        // Print temp to cdc

        char tempstr[16];

        itoa_fp(status.temp, status.temp_frac, tempstr);

        uint8_t numlen = strlen(tempstr);

        tempstr[numlen] = '\r';

        tempstr[numlen+1] = '\n';

        CDC_Transmit_FS(tempstr, numlen+2);

       // while(CDC_Transmit_FS("\r\n", 2) == USBD_BUSY);

        last_vcp_tx = ticks;

    }

}

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