Changeset - e81ace60fae3
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Ethan Zonca - 10 years ago 2014-09-03 22:34:07
ez@ethanzonca.com
Added storage of params to eeprom
1 file changed with 107 insertions and 7 deletions:
main.c
107
7
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main.c
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@@ -18,20 +18,29 @@ 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;
 
 
// 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,
 
};
 
@@ -42,12 +51,14 @@ 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();
 
 
int main(void)
 
{
 
 
    // Init clocks
 
    SystemInit();
 
@@ -61,13 +72,12 @@ int main(void)
 
    //USB_Init();
 
 
    // Turn on power LED
 
    GPIO_SetBits(LED_POWER);
 
 
    // TODO: Awesome pwm of power LED (TIM4_CH4 or TIM11_CH1)
 
    // TODO: PWM of stat led (TIM3_CH2)
 
 
    // Configure 1ms SysTick (change if more temporal resolution needed)
 
    RCC_ClocksTypeDef RCC_Clocks;
 
    RCC_GetClocksFreq(&RCC_Clocks);
 
    SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
 
 
@@ -80,12 +90,16 @@ int main(void)
 
 
    // Startup screen
 
    ssd1306_DrawString("therm v0.1", 1, 40);
 
    ssd1306_DrawString("protofusion.org/therm", 3, 0);
 
    delay(1500);
 
    ssd1306_clearscreen();
 
    restore_settings();
 
    delay(1500);
 
    delay(1500);
 
    ssd1306_clearscreen();
 
 
    GPIO_ResetBits(LED_STAT);
 
 
    // Main loop
 
    while(1)
 
    {
 
@@ -144,14 +158,12 @@ void update_temp() {
 
 
// PID implementation
 
int16_t last_pid_temp = 0;
 
uint8_t last_pid_temp_frac = 0;
 
int16_t i_state = 0;
 
 
#define WINDUP_GUARD_GAIN 100
 
uint16_t windup_guard = WINDUP_GUARD_GAIN;
 
 
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 = (int16_t)setpoint - (int16_t)temp; // TODO: Use fixed point fraction
 
 
@@ -199,15 +211,12 @@ int16_t update_pid(uint16_t k_p, uint16_
 
 
 
uint32_t ticks = 0;
 
uint32_t last_ssr_on = 0;
 
uint32_t last_led = 0;
 
int32_t setpoint = 0;
 
uint16_t k_p = 1;
 
uint16_t k_i = 1;
 
uint16_t k_d = 1;
 
int16_t ssr_output = 0; // Duty cycle of ssr, 0 to SSR_PERIOD
 
uint8_t pid_enabled = 0;
 
 
// Process things
 
void process()
 
{
 
@@ -281,12 +290,66 @@ 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
 
 
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 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);
 
 
    DATA_EEPROM_Lock();
 
 
    char tempstr[6];
 
    itoa(windup_guard, tempstr);
 
    ssd1306_DrawString("Read: ", 3, 40);
 
    ssd1306_DrawString("    ", 3, 72);
 
    ssd1306_DrawString(tempstr, 3, 72);
 
}
 
 
void machine()
 
{
 
    uint8_t last_state = state;
 
 
    uint8_t sw_btn = !GPIO_ReadInputDataBit(SW_BTN);
 
    uint8_t sw_up = !GPIO_ReadInputDataBit(SW_UP);
 
@@ -470,13 +533,13 @@ void machine()
 
            ssd1306_DrawString(tempstr, 1, 57);
 
 
            ssd1306_DrawString("Press to accept", 3, 40);
 
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                state = STATE_IDLE;
 
                state = STATE_SETBOOTTOBREW;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_UP)) {
 
                windup_guard++;
 
            }
 
            else if(!GPIO_ReadInputDataBit(SW_DOWN) && windup_guard > 0) {
 
                windup_guard--;
 
@@ -484,12 +547,46 @@ void machine()
 
 
            // 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
 
@@ -611,14 +708,17 @@ void machine()
 
        } 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;
 
}
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