Changeset - 31284ec8ec2c
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Ethan Zonca - 10 years ago 2014-09-03 22:45:13
ez@ethanzonca.com
Added setpoint saving. Need to do modification checks to reduce number of writes.
1 file changed with 43 insertions and 15 deletions:
main.c
43
15
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main.c
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#include "main.h"
 
#include "stm32l100c_discovery.h"
 
#include "ssd1306.h"
 
#include "config.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
 
// TODO: Eliminate screen buffer since we aren't using it...
 
 
// 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;
 
 
// Globalish setting vars
 
uint8_t boottobrew = 0;
 
#define WINDUP_GUARD_GAIN 100
 
uint16_t windup_guard = WINDUP_GUARD_GAIN;
 
uint16_t k_p = 1;
 
uint16_t k_i = 1;
 
uint16_t k_d = 1;
 
 
int16_t setpoint_brew = 0;
 
int16_t setpoint_steam = 0;
 
 
// State definition
 
enum state {
 
    STATE_IDLE = 0,
 
 
    STATE_SETP,
 
    STATE_SETI,
 
    STATE_SETD,
 
    STATE_SETWINDUP,
 
    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 init_gpio();
 
void init_spi();
 
void process();
 
void machine();
 
void delay(__IO uint32_t nTime);
 
void restore_settings();
 
void save_settings();
 
void save_setpoints();
 
 
int main(void)
 
{
 
 
    // Init clocks
 
    SystemInit();
 
 
    // Init GPIO
 
    init_gpio();
 
 
    // Init USB
 
    //Set_USBClock();
 
    //USB_Interrupts_Config();
 
    //USB_Init();
 
 
    // 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();
 
 
    // 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
 
@@ -262,128 +266,145 @@ void process()
 
 
    // Kill SSR after elapsed period less than SSR_PERIOD
 
    if(ticks - last_ssr_on > ssr_output)
 
    {
 
        GPIO_ResetBits(LED_STAT);
 
    }
 
}
 
 
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);
 
    itoa(setpoint, tempstr);
 
    ssd1306_DrawString("    ", 3, 95);
 
    ssd1306_DrawString(tempstr, 3, 95);
 
}
 
 
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)
 
 
/*
 
 * uint8_t boottobrew = 0;
 
#define WINDUP_GUARD_GAIN 100
 
uint16_t windup_guard = WINDUP_GUARD_GAIN;
 
uint16_t k_p = 1;
 
uint16_t k_i = 1;
 
uint16_t k_d = 1;*/
 
 
#define EEPROM_ADDR_WINDUP_GUARD 	0x0808001C
 
#define EEPROM_ADDR_BOOTTOBREW		0x08080020
 
#define EEPROM_ADDR_K_P			0x8080024
 
#define EEPROM_ADDR_K_I			0x8080028
 
#define EEPROM_ADDR_K_D			0x808002C
 
 
#define EEPROM_ADDR_BREWTEMP		0x8080030
 
#define EEPROM_ADDR_STEAMTEMP		0x8080034
 
 
 
void save_settings()
 
{
 
    DATA_EEPROM_Unlock();
 
    // Try programming a word at an address divisible by 4
 
    DATA_EEPROM_ProgramWord(EEPROM_ADDR_BOOTTOBREW, boottobrew);
 
    DATA_EEPROM_ProgramWord(EEPROM_ADDR_WINDUP_GUARD, windup_guard);
 
    DATA_EEPROM_ProgramWord(EEPROM_ADDR_K_P, k_p);
 
    DATA_EEPROM_ProgramWord(EEPROM_ADDR_K_I, k_i);
 
    DATA_EEPROM_ProgramWord(EEPROM_ADDR_K_D, k_d);
 
    DATA_EEPROM_Lock();
 
}
 
void save_setpoints()
 
{
 
    DATA_EEPROM_Unlock();
 
    DATA_EEPROM_ProgramWord(EEPROM_ADDR_BREWTEMP, setpoint_brew);
 
    DATA_EEPROM_ProgramWord(EEPROM_ADDR_STEAMTEMP, setpoint_steam);
 
    DATA_EEPROM_Lock();
 
}
 
 
}
 
 
// TODO: Save/restore temperature setpoint settings
 
void restore_settings()
 
{
 
    DATA_EEPROM_Unlock();
 
    while(FLASH_GetStatus()==FLASH_BUSY);
 
    boottobrew = (*(__IO uint32_t*)EEPROM_ADDR_BOOTTOBREW);
 
 
    while(FLASH_GetStatus()==FLASH_BUSY);
 
    windup_guard = (*(__IO uint32_t*)EEPROM_ADDR_WINDUP_GUARD);
 
 
    while(FLASH_GetStatus()==FLASH_BUSY);
 
    k_p = (*(__IO uint32_t*)EEPROM_ADDR_K_P);
 
 
    while(FLASH_GetStatus()==FLASH_BUSY);
 
    k_i = (*(__IO uint32_t*)EEPROM_ADDR_K_I);
 
 
    while(FLASH_GetStatus()==FLASH_BUSY);
 
    k_d = (*(__IO uint32_t*)EEPROM_ADDR_K_D);
 
 
    while(FLASH_GetStatus()==FLASH_BUSY);
 
    setpoint_brew = (*(__IO uint32_t*)EEPROM_ADDR_BREWTEMP);
 
 
    while(FLASH_GetStatus()==FLASH_BUSY);
 
    setpoint_steam = (*(__IO uint32_t*)EEPROM_ADDR_STEAMTEMP);
 
 
    DATA_EEPROM_Lock();
 
}
 
 
void machine()
 
{
 
    uint8_t last_state = state;
 
 
    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);
 
 
    switch(state)
 
    {
 
        // Idle state
 
        case STATE_IDLE:
 
        {
 
            // Write text to OLED
 
            // [ therm :: idle ]
 
            ssd1306_DrawString("therm :: idle ", 0, 40);
 
            pid_enabled = 0;
 
 
            char tempstr[6];
 
            itoa_fp(temp, temp_frac, tempstr);
 
            ssd1306_DrawString("Temp: ", 3, 40);
 
            ssd1306_DrawString("    ", 3, 72);
 
            ssd1306_DrawString(tempstr, 3, 72);
 
 
            ssd1306_drawlogo();
 
 
            switch(goto_mode) {
 
                case 2:
 
                {
 
                    ssd1306_DrawString("-> brew     ", 1, 40);
 
                } break;
 
 
                case 1:
 
                {
 
                    ssd1306_DrawString("-> setup    ", 1, 40);
 
                } break;
 
 
                case 0:
 
                {
 
                    ssd1306_DrawString("-> reset    ", 1, 40);
 
                } break;
 
            }
 
 
@@ -546,191 +567,198 @@ void machine()
 
        } 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();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
	    setpoint = setpoint_brew;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
		save_setpoints(); // TODO: Check for mod
 
                state = STATE_IDLE;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_UP)) {
 
               setpoint++;
 
               setpoint_brew++;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint > 0) {
 
                setpoint--;
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint_brew > 0) {
 
                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();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
	    setpoint = setpoint_brew;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
		save_setpoints(); // TODO: Check for mod
 
                state = STATE_IDLE;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_UP)) {
 
               setpoint++;
 
               setpoint_brew++;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint > 0) {
 
                setpoint--;
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint_brew > 0) {
 
                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();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
 
	    setpoint = setpoint_steam;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                state = STATE_IDLE;
 
		save_setpoints(); // TODO: Check for mod
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_UP)) {
 
               setpoint++;
 
               setpoint_steam++;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint > 0) {
 
                setpoint--;
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint_steam > 0) {
 
                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();
 
            draw_setpoint();
 
            pid_enabled = 1;
 
	    setpoint = setpoint_steam;
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                state = STATE_IDLE;
 
		save_setpoints(); // TODO: Check for mod
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_UP)) {
 
               setpoint++;
 
               setpoint_steam++;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint > 0) {
 
                setpoint--;
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && setpoint_steam > 0) {
 
                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);
 
}
 
 
// ISR-triggered decrement of delay and increment of tickcounter
 
void TimingDelay_Decrement(void)
 
{
 
  if (TimingDelay != 0x00)
 
  {
 
    TimingDelay--;
 
  }
 
  ticks++;
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