therm Changeset - 9294a623e8e5 · protofusion repositories

Changeset - 9294a623e8e5

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[Not reviewed]

cortex-f0

0 5 0

Ethan Zonca - 8 years ago 2016-04-23 22:15:22
ez@ethanzonca.com

Added support for both heaters and coolers as well as thermostatic control

5 files changed with 157 insertions and 14 deletions:

Makefile

config.h

display.c

main.c

states.h

0 comments (0 inline, 0 general)

Makefile

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@@ @@ -30,16 +30,18 @@ USER_INCLUDES = -Isystem @@
 # 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 -fno-exceptions -fdata-sections -Os
+USER_CFLAGS = -Wall -g -ffunction-sections -fno-exceptions -fdata-sections -Os --function-sections -fno-common
 # USER_LDFLAGS:  user LD flags
 USER_LDFLAGS = -fno-exceptions -ffunction-sections -fno-exceptions -fdata-sections -Wl,--gc-sections
 USER_LDFLAGS += --static
 # TARGET_DEVICE: device to compile for
 TARGET_DEVICE = STM32F042x6
 #######################################
 # end of user configuration
 #######################################

config.h

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 #ifndef CONFIG_H
 #define CONFIG_H
 // Temperature sensor type
 //#define MAX31855_TC_SENSOR
 #define MAX31865_RTD_SENSOR
 #define MAX31855_TC_SENSOR
 //#define MAX31865_RTD_SENSOR
 // Virtual serial port transmit rate
 #define VCP_TX_FREQ 1000
 // Solid-state relay maximum on-time

display.c

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Show inline comments

@@ @@ -70,13 +70,16 @@ void display_process(therm_settings_t* s @@
+            }
             switch(goto_mode) {
                 case MODE_HEAT:
+                {
                     ssd1306_drawstring("-> heat     ", 1, 40);
                     if(set->val.plant_type == PLANT_HEATER)
                         ssd1306_drawstring("-> heat     ", 1, 40);
                     else
                         ssd1306_drawstring("-> cool     ", 1, 40);
                 } break;
                 case MODE_SETUP:
+                {
                     ssd1306_drawstring("-> setup    ", 1, 40);
                 } break;
@@ @@ -98,13 +101,13 @@ void display_process(therm_settings_t* s @@
             if(SW_BTN_PRESSED) {
                 switch(goto_mode) {
                     case MODE_HEAT:
                         status->state = STATE_PREHEAT;
                         break;
                     case MODE_SETUP:
-                        status->state = STATE_SETP;
+                        status->state = STATE_SETMODE;
                         break;
                     case MODE_RESET:
                         status->state = STATE_RESET;
                         reset_mode = RESET_REBOOT;
                         break;
 					#ifdef BOOTLOADER_SHORTCUT
@@ @@ -131,12 +134,79 @@ void display_process(therm_settings_t* s @@
             // Event Handler
             // N/A
         } break;
         case STATE_SETMODE:
+        {
             // Write text to OLED
             // [ therm :: set mode ]
             // [ m =          ]
             ssd1306_drawstring("Control Mode", 0, 40);
             ssd1306_drawlogo();
             if(set->val.control_mode == MODE_PID)
                 ssd1306_drawstring("PID       ", 1, 60);
             else
                 ssd1306_drawstring("Thermostat", 1, 60);
             ssd1306_drawstring("Press to accept", 3, 40);
             // Button handler
             if(SW_BTN_PRESSED) {
                 status->state = STATE_SETPLANTTYPE;
+            }
             else if (!HAL_GPIO_ReadPin(SW_UP)) {
                 set->val.control_mode = MODE_PID;
+            }
             else if(!HAL_GPIO_ReadPin(SW_DOWN)) {
                 set->val.control_mode = MODE_THERMOSTAT;
+            }
             // Event Handler
             // N/A
         } break;
         case STATE_SETPLANTTYPE:
+        {
             // Write text to OLED
             // [ therm :: set mode ]
             // [ m =          ]
             ssd1306_drawstring("Plant Type", 0, 40);
             ssd1306_drawlogo();
             if(set->val.plant_type == PLANT_HEATER)
                 ssd1306_drawstring("Heater", 1, 60);
             else
                 ssd1306_drawstring("Cooler", 1, 60);
             ssd1306_drawstring("Press to accept", 3, 40);
             // Button handler
             if(SW_BTN_PRESSED) {
                 if(set->val.control_mode == MODE_PID)
                     status->state = STATE_SETP;
                 else
                     status->state = STATE_SETBOOTTOBREW;
+            }
             else if (!HAL_GPIO_ReadPin(SW_UP)) {
                 set->val.plant_type = PLANT_COOLER;
+            }
             else if(!HAL_GPIO_ReadPin(SW_DOWN)) {
                 set->val.plant_type = PLANT_HEATER;
+            }
             // Event Handler
             // N/A
         } break;
         case STATE_SETP:
+        {
             // Write text to OLED
             // [ therm :: set p ]
             // [ p = 12         ]
             ssd1306_drawstring("Proportional", 0, 40);
@@ @@ -375,14 +445,18 @@ void display_process(therm_settings_t* s @@
         case STATE_MAINTAIN:
+        {
             // Write text to OLED
             // [ therm : ready to brew ]
             // [ 30 => 120 C           ]
             ssd1306_drawstring("Preheated!", 0, 0);
             //ssd1306_drawlogo();
             if(set->val.plant_type == PLANT_HEATER)
                 ssd1306_drawstring("Preheated!", 0, 0);
             else
                 ssd1306_drawstring("Precooled!", 0, 0);
             draw_setpoint(status);
             status->pid_enabled = 1;
             status->setpoint = set->val.setpoint_brew;
             // Button handler
             if(SW_BTN_PRESSED) {

main.c

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@@ @@ -86,25 +86,26 @@ int main(void) @@
     // Soft timers
     uint32_t last_ssr_on = 0;
     uint32_t last_vcp_tx = 0;
     uint32_t last_led = 0;
     uint32_t last_pid = 0;
     uint32_t last_thermostat = 0;
     int16_t ssr_output = 0; // Duty cycle of ssr, 0 to SSR_PERIOD
     // Main loop
     while(1)
+    {
         // Process sensor inputs
         if(HAL_GetTick() - last_led > 400)
+        {
             last_led = HAL_GetTick();
+        }
         if((HAL_GetTick() - last_pid > PID_PERIOD))
+        if(set.val.control_mode == MODE_PID && (HAL_GetTick() - last_pid > PID_PERIOD))
+        {
             #ifdef MAX31865_RTD_SENSOR
             max31865_readtemp(spi_get(), &set, &status);
 			#else
 			max31855_readtemp(spi_get(), &set, &status); // Read MAX31855
@@ @@ -112,12 +113,16 @@ int main(void) @@
             if(status.pid_enabled)
+            {
                 // Get ssr output for next time
                 int16_t power_percent = pid_update(&set, &status, &pid_state);
                 if(set.val.plant_type == PLANT_HEATER)
                     power_percent *= -1;
                 //power-percent is 0-1000?
                 ssr_output = power_percent; //(((uint32_t)SSR_PERIOD * (uint32_t)10 * (uint32_t)100) * power_percent) / (uint32_t)1000000;
             	// put ssr output on display
                 ssd1306_drawstring("      ", 0, 90); //fixme: this is bad, but I can't get the old digits to clear otherwise
@@ @@ -131,38 +136,86 @@ int main(void) @@
+            }
             last_pid = HAL_GetTick();
+        }
         // Kill SSR once the desired on-time has elapsed
         if(HAL_GetTick() - last_ssr_on > ssr_output || ssr_output <= 0)
+        if(set.val.control_mode == MODE_PID && (HAL_GetTick() - last_ssr_on > ssr_output || ssr_output <= 0))
+        {
             HAL_GPIO_WritePin(SSR_PIN, 0);
             HAL_GPIO_WritePin(LED_POWER, 0);
+        }
         // Every 200ms, set the SSR on unless output is 0
         if(HAL_GetTick() - last_ssr_on > SSR_PERIOD)
+        if(set.val.control_mode == MODE_PID && HAL_GetTick() - last_ssr_on > SSR_PERIOD)
+        {
             // Only support heating (ssr_output > 0) right now
             // Heat or cool, if we need to
             if(ssr_output > 0)
+            {
                 HAL_GPIO_WritePin(SSR_PIN, 1);
                 HAL_GPIO_WritePin(LED_POWER, 1);
                 last_ssr_on = HAL_GetTick();
+            }
             else {
                 // Make sure everything is off
                 HAL_GPIO_WritePin(SSR_PIN, 0);
                 HAL_GPIO_WritePin(LED_POWER, 0);
+            }
+        }
         // Thermostatic control
         if(set.val.control_mode == MODE_THERMOSTAT && HAL_GetTick() - last_thermostat > SSR_PERIOD)
+        {
             #ifdef MAX31865_RTD_SENSOR
             max31865_readtemp(spi_get(), &set, &status);
 			#else
 			max31855_readtemp(spi_get(), &set, &status); // Read MAX31855
 			#endif
             // TODO: Migrate this FxP conversion to the readtemp code or similar
             int8_t temp_frac = status.temp_frac > 9 ? status.temp_frac / 10 : status.temp_frac;
             temp_frac = status.temp > 0 ? temp_frac : temp_frac * -1;
             int32_t temp = (status.temp * 10) + temp_frac;
             uint8_t plant_on = 0;
             // EMZ FIXME: This could be way simpler
             if(set.val.plant_type == PLANT_HEATER && status.setpoint * 10 < temp)
                 plant_on = 1;
             else if(set.val.plant_type == PLANT_COOLER && status.setpoint * 10 > temp)
                 plant_on = 1;
             // EMZ: TODO: Refactor to output_enabled or something
             if(status.pid_enabled && plant_on)
+            {
                 // EMZ TODO: functionalize this
             	// put ssr output on display
                 ssd1306_drawstring("      ", 0, 90); //fixme: this is bad, but I can't get the old digits to clear otherwise
                 char tempstr[6];
                 itoa(ssr_output, tempstr, 10);
                 ssd1306_drawstring(tempstr, 0, 90);
                 HAL_GPIO_WritePin(SSR_PIN, 1);
                 HAL_GPIO_WritePin(LED_POWER, 1);
+            }
             else
+            {
                 HAL_GPIO_WritePin(SSR_PIN, 0);
                 HAL_GPIO_WritePin(LED_POWER, 0);
+            }
             last_thermostat = HAL_GetTick();
+        }
         // Transmit temperature over USB-CDC on a regular basis
         if(HAL_GetTick() - last_vcp_tx > VCP_TX_FREQ)
+        {
             // Print temp to cdc
             char tempstr[16];
             itoa_fp(status.temp, status.temp_frac, tempstr);

states.h

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Show inline comments

@@ @@ -24,25 +24,29 @@ typedef union @@
         uint32_t k_i;
         uint32_t k_d;
         int32_t temp_offset;
         uint32_t ignore_error;
         int32_t setpoint_brew;
         int32_t setpoint_steam;
         uint32_t control_mode;
         uint32_t plant_type;
     } val;
     uint16_t data[128];
 } therm_settings_t;
 enum tempunits {
     TEMP_UNITS_CELSIUS = 0,
     TEMP_UNITS_FAHRENHEIT,
 };
 enum state {
     STATE_IDLE = 0,
     STATE_SETMODE,
     STATE_SETPLANTTYPE,
     STATE_SETP,
     STATE_SETI,
     STATE_SETD,
     STATE_SETSTEPS,
     STATE_SETWINDUP,
     STATE_SETBOOTTOBREW,
@@ @@ -53,12 +57,22 @@ enum state { @@
     STATE_MAINTAIN,
     STATE_TC_ERROR,
 	STATE_RESET,
 };
 enum control_mode {
     MODE_PID = 0,
     MODE_THERMOSTAT,
 };
 enum plant_type {
     PLANT_HEATER = 0,
     PLANT_COOLER,
 };
 enum GOTO_MODE {
 	#ifdef BOOTLOADER_SHORTCUT
 	MODE_BOOTLOADER,
 	#endif
 	MODE_HEAT,
 	MODE_SETUP,

0 comments (0 inline, 0 general)