TARGET:=therm

TOOLCHAIN_PATH:=/usr/bin

TOOLCHAIN_PREFIX:=arm-none-eabi

OPTLVL:=3 # Optimization level, can be [0, 1, 2, 3, s].

#PROJECT_NAME:=$(notdir $(lastword $(CURDIR)))

TOP:=$(shell readlink -f "../..")

LIBDIR:=libraries

HAL_LIB:=$(LIBDIR)/STM32F0xx_HAL_Driver

USB_LIB:=$(LIBDIR)/STM32_USB_Device_Library

LINKER_SCRIPT:=$(CURDIR)/stm32-flash.ld

# Local libs

INCLUDE=-I$(CURDIR)

# CMSIS

INCLUDE+=-I$(LIBDIR)/CMSIS/Include

INCLUDE+=-I$(LIBDIR)/CMSIS/Device/ST/STM32F0xx/Include

# USB

INCLUDE+=-I$(USB_LIB)/Class/CDC

INCLUDE+=-I$(USB_LIB)/Core

# HAL

INCLUDE+=-I$(HAL_LIB)/Inc

# vpath is used so object files are written to the current directory instead

# of the same directory as their source files

vpath %.s $(STARTUP)

# Project Source Files

SRC=main.c

SRC+=stm32f0xx_it.c

SRC+=system_stm32f0xx.c

SRC+=ssd1306.c

SRC+=eeprom_min.c

SRC+=gpio.c

SRC+=spi.c

SRC+=stringhelpers.c

# Discovery Source Files

#SRC+=stm32f4_discovery_lis302dl.c

#SRC+=stm32f4_discovery.c

#SRC+=stm32f4_discovery_audio_codec.c

# Standard Peripheral Source Files

SRC+=stm32f0xx_syscfg.c

SRC+=misc.c

SRC+=stm32f0xx_adc.c

SRC+=stm32f0xx_dac.c

SRC+=stm32f0xx_dma.c

SRC+=stm32f0xx_exti.c

SRC+=stm32f0xx_flash.c

SRC+=stm32f0xx_gpio.c

SRC+=stm32f0xx_i2c.c

SRC+=stm32f0xx_rcc.c

SRC+=stm32f0xx_spi.c

SRC+=stm32f0xx_tim.c

# USB Source Files

SRC+=usb_core.c

SRC+=usb_init.c

SRC+=usb_int.c

SRC+=usb_mem.c

SRC+=usb_regs.c

SRC+=usb_sil.c

SRC+=hw_config.c

SRC+=usb_desc.c

SRC+=usb_endp.c

SRC+=usb_istr.c

SRC+=usb_prop.c

SRC+=usb_pwr.c

CDEFS=-DUSE_STDPERIPH_DRIVER

CDEFS+=-DSTM32F0XX

CDEFS+=-DMANGUSTA_DISCOVERY

#CDEFS+=-DUSE_USB_OTG_FS

# EMZ FIXME

CDEFS+=-DHSE_VALUE=8000000

#EMZ Optimized: 

MCUFLAGS=-mcpu=cortex-m3 -mthumb -ffunction-sections -fdata-sections -mfloat-abi=soft

# Default:  MCUFLAGS=-mcpu=cortex-m3 -mthumb -ffunction-sections -fdata-sections

#MCUFLAGS=-mcpu=cortex-m4 -mthumb -mlittle-endian -mfpu=fpa -mfloat-abi=hard -mthumb-interwork

#MCUFLAGS=-mcpu=cortex-m4 -mfpu=vfpv4-sp-d16 -mfloat-abi=hard

COMMONFLAGS=-O$(OPTLVL) -g -Wall

CFLAGS=$(COMMONFLAGS) $(MCUFLAGS) $(INCLUDE) $(CDEFS)

LDLIBS=

LDFLAGS=$(COMMONFLAGS) -fno-exceptions -ffunction-sections -fdata-sections \

        -nostartfiles -Wl,--gc-sections,-T$(LINKER_SCRIPT)

#####

#####

OBJ = $(SRC:%.c=%.o) $(ASRC:%.s=%.o)

CC=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-gcc

LD=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-gcc

OBJCOPY=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-objcopy

AS=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-as

AR=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-ar

GDB=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-gdb

SIZE=$(TOOLCHAIN_PATH)/$(TOOLCHAIN_PREFIX)-size

all: $(OBJ)

	$(CC) -o $(TARGET).elf $(LDFLAGS) $(OBJ)	$(LDLIBS)

	$(OBJCOPY) -O ihex   $(TARGET).elf $(TARGET).hex

	$(OBJCOPY) -O binary $(TARGET).elf $(TARGET).bin

.PHONY: clean

clean:

	rm -f $(OBJ)

	rm -f $(TARGET).elf

	rm -f $(TARGET).hex

	rm -f $(TARGET).bin

# Display size

size: $(TARGET).elf

	@echo Invoking: ARM GNU Print Size

	$(SIZE) --format=berkeley $<

	@echo

#ifndef EEPROM_MIN_H

#define EEPROM_MIN_H

#define EEPROM_BASE_ADDR    0x08080000    

#define EEPROM_BYTE_SIZE    0x0FFF  

#define EEPROM_ADDR_WINDUP_GUARD 	0x001C

#define EEPROM_ADDR_BOOTTOBREW		0x0020

#define EEPROM_ADDR_K_P			0x0024

#define EEPROM_ADDR_K_I			0x0028

#define EEPROM_ADDR_K_D			0x002C

#define EEPROM_ADDR_BREWTEMP		0x0030

#define EEPROM_ADDR_STEAMTEMP		0x0034

#define EEPROM_ADDR_UNITS		0x0038

void Minimal_EEPROM_Unlock(void);

void Minimal_EEPROM_Lock(void);

FLASH_Status Minimal_FLASH_GetStatus(void);

FLASH_Status Minimal_FLASH_WaitForLastOperation(uint32_t Timeout);

void Minimal_EEPROM_ProgramWord(uint32_t Address, uint32_t Data);

#endif

#include "main.h"

#include "usb_device.h"

#include "ssd1306.h"

#include "config.h"

#include "eeprom_min.h"

#include "gpio.h"

#include "clock.h"

#include "spi.h"

// USB includes

//#include "hw_config.h"

//#include "usb_lib.h"

//#include "usb_desc.h"

//#include "usb_pwr.h"

//#include "stringhelpers.h"

// TODO: Grab buttonpresses with interrupts

// USB Supporting Vars

extern __IO uint8_t Receive_Buffer[64];

extern __IO  uint32_t Receive_length ;

extern __IO  uint32_t length ;

uint8_t Send_Buffer[64];

uint32_t packet_sent=1;

uint32_t packet_receive=1;

enum tempunits {

    TEMP_UNITS_CELSIUS = 0,

    TEMP_UNITS_FAHRENHEIT,

};

// Globalish setting vars

uint8_t boottobrew = 0;

uint8_t temp_units = TEMP_UNITS_CELSIUS;

uint16_t windup_guard = 1;

uint16_t k_p = 1;

uint16_t k_i = 1;

uint16_t k_d = 1;

uint8_t ignore_tc_error  = 0;

// ISR ticks var

volatile uint32_t ticks = 0;

int16_t setpoint_brew = 0;

int16_t setpoint_steam = 0;

// HAL Variables

SPI_HandleTypeDef hspi1;

// State definition

enum state {

    STATE_IDLE = 0,

    STATE_SETP,

    STATE_SETI,

    STATE_SETD,

    STATE_SETSTEPS,

    STATE_SETWINDUP,

    STATE_SETBOOTTOBREW,

    STATE_SETUNITS,

    STATE_PREHEAT_BREW,

    STATE_MAINTAIN_BREW,

    STATE_PREHEAT_STEAM,

    STATE_MAINTAIN_STEAM,

    STATE_TC_ERROR

};

uint8_t state = STATE_IDLE;

static __IO uint32_t TimingDelay;

// Move to header file

void process();

void machine();

void restore_settings();

void save_settings();

void save_setpoints();

int main(void)

{

    // Init clocks

    HAL_Init();

    SystemClock_Config();

    // Init GPIO

    init_gpio();

    // Turn on power LED

    GPIO_SetBits(LED_POWER);

    // TODO: Awesome pwm of power LED (TIM4_CH4 or TIM11_CH1)

    // 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 USB 

    init_usb();

    // Init OLED over SPI

    ssd1306_Init();

    ssd1306_clearscreen();

    // Check for problems on startup

    uint8_t clock_fail = 0; // FIXME implement in system

    if(clock_fail) {

        //ssd1306_DrawStringBig("ERROR: Check Xtal", 2, 0);

        ssd1306_DrawStringBig("NO XTAL", 2, 0);

        delay(1000);

        ssd1306_clearscreen();

    }

    // Init USB

    //Set_System(); // hw_config.h

    //Set_USBClock();

    //SB_Interrupts_Config();

    //SB_Init();

    //SYSCFG_USBPuCmd(ENABLE);

    //PowerOn();

    // Startup screen 

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

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

    delay(1500);

    ssd1306_clearscreen();

    restore_settings();

    if(boottobrew)

      state = STATE_PREHEAT_BREW; // Go to brew instead of idle if configured thusly

    GPIO_ResetBits(LED_STAT);

    // Main loop

    while(1)

    {

        // Process sensor inputs

        process();

        // Run state machine

        machine(); 

    }

}

// Read temperature and update global temp vars

int32_t temp = 0;

uint8_t temp_frac = 0;

uint8_t state_resume = 0;

void update_temp() {

    // Assert CS

    GPIO_ResetBits(MAX_CS);

    delay(1);

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

    SPI_I2S_SendData(SPI2, 0xAAAA); // send dummy data

    //SPI_I2S_SendData(SPI2, 0xAA); // send dummy data

    uint16_t temp_pre = SPI_I2S_ReceiveData(SPI2);

    if(temp_pre & 0b0000000000000010) {

        ssd1306_DrawString("Fatal Error", 3, 35);

        state = STATE_TC_ERROR;

    }

    else if(temp_pre & 0b0000000000000001 && !ignore_tc_error) {

        state_resume = state;

        state = STATE_TC_ERROR;

        temp = 0;

        temp_frac = 0;

    }

    else 

    {

        if(state == STATE_TC_ERROR)

        {

            state = state_resume;

            ssd1306_clearscreen();

        }

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

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

        temp_frac = temp_pre & 0b11; // get fractional part

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

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

#ifndef __MAIN_H

#define __MAIN_H

#include "stm32f0xx_hal_conf.h"

void TimingDelay_Decrement(void);

void delay(__IO uint32_t nTime);

#endif /* __MAIN_H */