Changeset - fe0367a9a87a
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Ethan Zonca - 10 years ago 2014-10-18 17:33:12
ez@ethanzonca.com
Added larger font size and removed logos on preheat/etc screens
1 file changed with 16 insertions and 18 deletions:
main.c
16
18
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main.c
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@@ -47,98 +47,99 @@ enum state {
 
    STATE_SETBOOTTOBREW,
 
 
    STATE_PREHEAT_BREW,
 
    STATE_MAINTAIN_BREW,
 
    STATE_PREHEAT_STEAM,
 
    STATE_MAINTAIN_STEAM,
 
};
 
 
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
 
    SystemInit();
 
 
    // 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 OLED over SPI
 
    ssd1306_Init();
 
    ssd1306_clearscreen();
 
 
    // Check for problems on startup
 
    if(clock_fail) {
 
        //ssd1306_DrawStringBig("ERROR: Check Xtal", 2, 0);
 
        ssd1306_DrawStringBig("XTAL ERR", 2, 0);
 
        delay(5000);
 
        ssd1306_DrawStringBig("NO XTAL", 2, 0);
 
        delay(1000);
 
        ssd1306_clearscreen();
 
    }
 
 
    // Init USB
 
    //Set_System(); // hw_config.h
 
    Set_USBClock();
 
    USB_Interrupts_Config();
 
    USB_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
 
int16_t temp = 0;
 
uint8_t temp_frac = 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);
 
 
@@ -219,123 +220,120 @@ int16_t update_pid(uint16_t k_p, uint16_
 
    result = 1000;
 
  else if(result < -1000)
 
    result = -1000;
 
 
  // Return feedback
 
  return result;
 
}
 
 
 
uint32_t last_ssr_on = 0;
 
uint32_t last_led = 0;
 
int32_t setpoint = 0;
 
int16_t ssr_output = 0; // Duty cycle of ssr, 0 to SSR_PERIOD
 
uint8_t pid_enabled = 0;
 
 
// Process things
 
void process()
 
{
 
    update_temp(); // Read MAX31855
 
 
    // TODO: Add calibration offset (linear)
 
 
    if(ticks - last_led > 400)
 
    {
 
        GPIO_ToggleBits(LED_POWER);
 
        last_led = ticks;
 
    }
 
 
    // Every 200ms, set the SSR on unless output is 0
 
    if((ticks - last_ssr_on > SSR_PERIOD))
 
    {
 
        if(pid_enabled)
 
        {
 
            // Get ssr output for next time
 
            int16_t power_percent = update_pid(k_p, k_i, k_d, temp, temp_frac, 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);
 
            ssd1306_DrawString("#=", 2, 45);
 
            ssd1306_DrawString("    ", 2, 57);
 
            ssd1306_DrawString(tempstr, 2, 57);
 
            ssd1306_DrawString(tempstr, 0, 90);
 
 
            GPIO_SetBits(LED_STAT);
 
            GPIO_SetBits(SSR_PIN);
 
            last_ssr_on = ticks;
 
        }
 
    }
 
 
    // Kill SSR after elapsed period less than SSR_PERIOD
 
    if(ticks - last_ssr_on > ssr_output || ssr_output == 0)
 
    {
 
        GPIO_ResetBits(LED_STAT);
 
        GPIO_ResetBits(SSR_PIN);
 
    }
 
}
 
 
void draw_setpoint() {
 
    char tempstr[3];
 
    itoa_fp(temp, temp_frac, tempstr);
 
    //ssd1306_DrawString("        ", 3, 40);
 
    ssd1306_DrawString(tempstr, 3, 40);
 
    ssd1306_DrawString("-> ", 3, 80);
 
    ssd1306_DrawStringBig(tempstr, 3, 0);
 
    ssd1306_DrawStringBig(">", 3, 74);
 
    itoa(setpoint, tempstr);
 
    ssd1306_DrawString("    ", 3, 95);
 
    ssd1306_DrawString(tempstr, 3, 95);
 
    ssd1306_DrawStringBig("    ", 3, 90);
 
    ssd1306_DrawStringBig(tempstr, 3, 90);
 
}
 
 
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)
 
 
void save_settings()
 
{
 
   Minimal_EEPROM_Unlock();
 
    // Try programming a word at an address divisible by 4
 
    Minimal_EEPROM_ProgramWord(EEPROM_BASE_ADDR + EEPROM_ADDR_BOOTTOBREW, boottobrew);
 
    Minimal_EEPROM_ProgramWord(EEPROM_BASE_ADDR + EEPROM_ADDR_WINDUP_GUARD, windup_guard);
 
    Minimal_EEPROM_ProgramWord(EEPROM_BASE_ADDR + EEPROM_ADDR_K_P, k_p);
 
    Minimal_EEPROM_ProgramWord(EEPROM_BASE_ADDR + EEPROM_ADDR_K_I, k_i);
 
    Minimal_EEPROM_ProgramWord(EEPROM_BASE_ADDR + EEPROM_ADDR_K_D, k_d);
 
    Minimal_EEPROM_Lock();
 
}
 
 
void save_setpoints()
 
{
 
 
    Minimal_EEPROM_Unlock();
 
    Minimal_EEPROM_ProgramWord(EEPROM_BASE_ADDR + EEPROM_ADDR_BREWTEMP, setpoint_brew);
 
    Minimal_EEPROM_ProgramWord(EEPROM_BASE_ADDR + EEPROM_ADDR_STEAMTEMP, setpoint_steam);
 
    Minimal_EEPROM_Lock();
 
}
 
 
 
// TODO: Make a struct that has all settings in it. Pass by ref to this func in a library.
 
void restore_settings()
 
{
 
    Minimal_EEPROM_Unlock();
 
    while(Minimal_FLASH_GetStatus()==FLASH_BUSY);
 
    boottobrew = (*(__IO uint32_t*)(EEPROM_BASE_ADDR + EEPROM_ADDR_BOOTTOBREW));
 
 
    while(Minimal_FLASH_GetStatus()==FLASH_BUSY);
 
    windup_guard = (*(__IO uint32_t*)(EEPROM_BASE_ADDR + EEPROM_ADDR_WINDUP_GUARD));
 
@@ -549,177 +547,177 @@ void machine()
 
            else {
 
                user_input(&windup_guard);
 
            }
 
 
            // Event Handler
 
            // N/A
 
 
        } break;
 
 
        case STATE_SETBOOTTOBREW:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set windup ]
 
            // [ g = 12         ]
 
            ssd1306_DrawString("Boot to Brew", 0, 40);
 
            ssd1306_drawlogo();
 
 
            ssd1306_DrawString("btb=", 1, 45);
 
 
            if(boottobrew)
 
                ssd1306_DrawString("Enabled ", 1, 70);
 
            else
 
                ssd1306_DrawString("Disabled", 1, 70);
 
 
            ssd1306_DrawString("Press to accept", 3, 40);
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                save_settings();
 
                state = STATE_IDLE;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_UP)) {
 
                boottobrew = 1;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN)) {
 
                boottobrew = 0;
 
            }
 
 
            // Event Handler
 
            // N/A
 
 
        } break;
 
 
        case STATE_PREHEAT_BREW:
 
        {
 
            // Write text to OLED
 
            // [ therm : preheating brew ]
 
            // [ 30 => 120 C             ]
 
            ssd1306_DrawString("Preheating...", 0, 40);
 
            ssd1306_drawlogo();
 
            ssd1306_DrawString("Preheating...", 0, 0);
 
            //ssd1306_drawlogo();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
	    setpoint = setpoint_brew;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
		save_setpoints(); // TODO: Check for mod
 
                state = STATE_IDLE;
 
            }
 
            else {
 
                user_input(&setpoint_brew);
 
            }
 
 
            // Event Handler
 
            if(temp >= setpoint) {
 
                state = STATE_MAINTAIN_BREW;
 
            }
 
 
        } break;
 
 
        case STATE_MAINTAIN_BREW:
 
        {
 
            // Write text to OLED
 
            // [ therm : ready to brew ]
 
            // [ 30 => 120 C           ]
 
            ssd1306_DrawString("Ready to Brew!", 0, 40);
 
            ssd1306_drawlogo();
 
            ssd1306_DrawString("Preheated!", 0, 0);
 
            //ssd1306_drawlogo();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
	    setpoint = setpoint_brew;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
		save_setpoints(); // TODO: Check for mod
 
                state = STATE_IDLE;
 
            }
 
            else {
 
                user_input(&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, 40);
 
            ssd1306_drawlogo();
 
            ssd1306_DrawString("Preheating...", 0, 0);
 
            //ssd1306_drawlogo();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
	    setpoint = setpoint_steam;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                state = STATE_IDLE;
 
		save_setpoints(); // TODO: Check for mod
 
            }
 
            else {
 
                user_input(&setpoint_steam);
 
            }
 
 
            // Event Handler
 
            if(temp >= setpoint) {
 
                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, 40);
 
            ssd1306_drawlogo();
 
            ssd1306_DrawString("Ready to Steam!", 0, 0);
 
            //ssd1306_drawlogo();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
	    setpoint = setpoint_steam;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                state = STATE_IDLE;
 
		save_setpoints(); // TODO: Check for mod
 
            }
 
            else {
 
                user_input(&setpoint_steam);
 
            }
 
 
            // Event Handler
 
            // N/A
 
 
        } break;
 
 
        // Something is terribly wrong
 
        default:
 
        {
 
            state = STATE_IDLE;
 
            pid_enabled = 0;
 
 
        } break;
 
 
    }
 
 
    if(last_state != state) {
 
        // Clear screen on state change
 
        goto_mode = 2;
 
        ssd1306_clearscreen();
 
    }
 
 
    // Last buttonpress
 
    sw_btn_last = sw_btn;
 
    sw_up_last = sw_up;
 
    sw_down_last = sw_down;
 
    sw_left_last = sw_left;
 
    sw_right_last = sw_right;
 
}
 
 
// Delay a number of systicks
 
void delay(__IO uint32_t nTime)
 
{
 
  TimingDelay = nTime;
 
  while(TimingDelay != 0);
 
}
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