therm-ng Changeset - 6cc8fa5ae0f6 · protofusion repositories

Changeset - 6cc8fa5ae0f6

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Ethan Zonca - 8 years ago 2017-07-25 13:17:30
ezonca@sealandaire.com

Temp reading finally working!

3 files changed with 15 insertions and 17 deletions:

lib/max31856/max31856.c

lib/ssd1306/ssd1306.c

src/display.c

0 comments (0 inline, 0 general)

lib/max31856/max31856.c

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 //
 // MAX31856: Driver to configure and read temperature from the MAX31856 thermoouple-to-Digital IC
 //
 #include "max31856.h"
 #include "states.h"
 #include "error.h"
 // Private variables
 static float temp_latest = 0.0;
 static float temp_avg = 0.0;
 SPI_HandleTypeDef* spiport;
 static GPIO_TypeDef* csport;
 static uint32_t cspin;
 // Private prototypes
 static void __cs_assert(void);
 static void __cs_deassert(void);
 static void __write_reg(uint8_t reg, uint8_t data);
 static void __read_reg(uint8_t reg, uint8_t* rxbuf, uint8_t len);
 // Initialize the MAX31856 driver
 void max31856_init(SPI_HandleTypeDef* spi_port, GPIO_TypeDef* cs_port, uint32_t cs_pin, uint32_t sensor_type)
+{
 	// Set CS pin references
 	csport = cs_port;
 	cspin = cs_pin;
 	// Set SPI port reference
 	spiport = spi_port;
 	// Configure the CS pin for output
 	GPIO_InitTypeDef GPIO_InitStruct;
 	GPIO_InitStruct.Pin = cs_pin;
 	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 	GPIO_InitStruct.Pull = GPIO_NOPULL;
 	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 	HAL_GPIO_Init(cs_port, &GPIO_InitStruct);
 	// MAX31856
 	// - set to continuous conversion mode
 	// - probably no filtering, we'll do that on this side of things
 	// - set up to read the typical open/short faults but not the high/low alarms
 	// TODO: Enable open/short detection
 	// Enables auto conv
 	__write_reg(MAX31856_CR0_REG, MAX31856_CR0_AUTOCONVERT); //  MAX31856_CR0_OCFAULT0
 	// Averaging set to 1 sample, TC type set to K
 	__write_reg(MAX31856_CR1_REG, MAX31856_TCTYPE_K);
 	// sensor type - could we just mask bits off? maybe optimize the enum for this
+}
 // Pull reading from the MAX31856 IC
 float max31856_process(void)
+{
 	uint8_t tempbuf[3];
 	__read_reg(MAX31856_LTCBH_REG, tempbuf, 3);
-	int32_t temp24 = tempbuf[0] << 16 | tempbuf[1] << 8 | tempbuf[0];
+	volatile int32_t temp24 = tempbuf[0] << 16 | tempbuf[1] << 8 | tempbuf[2];
 	if (temp24 & 0x800000) {
 		temp24 |= 0xFF000000;  // fix sign
+	}
 	temp24 >>= 5;  // bottom 5 bits are unused
 	float tempfloat = temp24;
 	tempfloat *= 0.0078125;
 	temp_latest = tempfloat;
 	return tempfloat;
 	// Read temperature from the MAX31856 (approx 10hz optimally)
 //	uint8_t data[] = {0,0,0,0};
 //	HAL_SPI_Transmit(spiport, data, 1, 100);
+}
 // Return latest temperature reading (unaveraged, deg C)
 float max31856_latest_temp(void)
+{
 	return temp_latest;
+}
 // Return average temperature reading (deg C)
 float max31856_avg_temp(void)
+{
 	return temp_latest;
+}
 static void __write_reg(uint8_t reg, uint8_t data)
+{
 	// Set write bit
 	reg |= MAX31856_WRITE_BIT;
 	uint8_t outarr[2] = {reg, data};
 	uint8_t dummyrx[2];
 	// Assert the bus
 	__cs_assert();
 	HAL_Delay(1);
 	// Write data
-	volatile HAL_StatusTypeDef res = HAL_SPI_Transmit(spiport, outarr, 2, 100);
+	volatile HAL_StatusTypeDef res = HAL_SPI_TransmitReceive(spiport, outarr, dummyrx, 2, 100);
 	HAL_Delay(1);
 	// Release the bus
 	__cs_deassert();
+}
 static void __read_reg(uint8_t reg, uint8_t* rxbuf, uint8_t len)
+{
 	// Transmit buffer only uses first item for reg addr
 	uint8_t regarr[1] = {reg};
 	uint8_t regarr[1];
 	regarr[0] = reg;
 	HAL_Delay(1);
 	uint8_t dummyrx[12] = {0};
 	uint8_t dummytx[12] = {0};
 	// Assert the bus
 	__cs_assert();
 	HAL_Delay(1);
 	// Send address
 	volatile HAL_StatusTypeDef res = HAL_SPI_Transmit(spiport, regarr, 1, 100);
 	HAL_Delay(1);
 	HAL_SPI_TransmitReceive(spiport, regarr, dummyrx, 1, 100);
 	// Receive data
 	volatile HAL_StatusTypeDef res2 = HAL_SPI_Receive(spiport, rxbuf, len, 100);
 	HAL_Delay(1);
 	HAL_SPI_TransmitReceive(spiport, dummytx, rxbuf, len, 100);
 	// Release bus
 	__cs_deassert();
 	HAL_Delay(1);
+}
 static void __cs_assert(void)
+{
 	HAL_GPIO_WritePin(csport, cspin, 0);
+}
 static void __cs_deassert(void)
+{
 	HAL_GPIO_WritePin(csport, cspin, 1);
+}

lib/ssd1306/ssd1306.c

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 #include "stm32f3xx_hal.h"
 #include "ssd1306.h"
 SPI_HandleTypeDef hspi1;
 // SPI handle accessor
 SPI_HandleTypeDef* spi_get()
+{
     return &hspi1;
+}
 // Write command to OLED
 static void WriteCommand(unsigned char command)
+{
   SSD_CS_Low();
   SSD_A0_Low();
   SPI_SendByte(command);
   SSD_CS_High();
+}
 // Write data to OLED
 static void WriteData(unsigned char data)
+{
   SSD_CS_Low();
   SSD_A0_High();
   SPI_SendByte(data);
   SSD_CS_High();
+}
 // Initialize OLED
 void ssd1306_init(void)
+{
 	__SPI3_CLK_ENABLE();
 	__GPIOA_CLK_ENABLE();
 	__GPIOB_CLK_ENABLE();
 	GPIO_InitTypeDef GPIO_InitStruct;
 	/*Configure GPIO pins : OLED_CS_Pin OLED_RESET_Pin OLED_DC_Pin */
 	GPIO_InitStruct.Pin = OLED_CS_Pin|OLED_RESET_Pin|OLED_DC_Pin;
 	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 	GPIO_InitStruct.Pull = GPIO_NOPULL;
 	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 	HAL_GPIO_Init(OLED_DC_GPIO_Port, &GPIO_InitStruct);
 	// Set up MOSI/MISO/SCK
 	GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5;
 	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 	GPIO_InitStruct.Pull = GPIO_NOPULL;
 	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 	GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
 	HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 	// Set up SPI port for OLED
 	hspi1.Instance = SPI3;
 	hspi1.Init.Mode = SPI_MODE_MASTER;
 	hspi1.Init.Direction = SPI_DIRECTION_2LINES;
 	hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
 	hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
 	hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
 	hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
 	hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;
 	hspi1.Init.NSS = SPI_NSS_SOFT;
-	hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_64; //16;
+	hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
 	hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
 	hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
 	hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
 	hspi1.Init.NSSPMode = SPI_NSS_PULSE_DISABLED;
 	HAL_SPI_Init(&hspi1);
 	// Generate a reset
 	SSD_Reset_Low();
 	uint32_t i;
 	for(i=5000; i>1; i--)
 	SSD_Reset_High();
 	WriteCommand(0xAE);
 	WriteCommand(0xD5);
 	WriteCommand(0x80);
 	WriteCommand(0xA8);
 	WriteCommand(0x1F);
 	WriteCommand(0xD3);
 	WriteCommand(0x00);
 	WriteCommand(0x40 | 0x00); // line #0
 	WriteCommand(0x8D);
 	WriteCommand(0x14); //10 or 14 if not externalvcc
 	WriteCommand(0x20);
 	WriteCommand(0x00);
 	//  WriteCommand(0xA0 | 0x1); // segremap (normal)
 	WriteCommand(0xA0); // segremap (flip)
 	//  WriteCommand(0xC8); // comscandec (normal)
 	WriteCommand(0xC0); // comscandec (flip)
 	WriteCommand(0xDA); // setcompins
 	WriteCommand(0x02);
 	WriteCommand(0x81); // contrast
 	WriteCommand(0x0F); // contrast value. 8f is a good one.
 	WriteCommand(0xD9);
 	WriteCommand(0xF1); //22 or F1 if not externalvcc
 	WriteCommand(0xDB);
 	WriteCommand(0x40);
 	WriteCommand(0xA4); // dispalyallon_resume
 	WriteCommand(0xA6); // normaldisplay
 	WriteCommand(0xAF); // display on
+}
 // Times New Roman font
 static const char fontData[][5] =
 {                                       // Refer to "Times New Roman" Font Database
                                         //   Basic Characters
     {0x00,0x00,0x00,0x00,0x00},         //   (  0)    - 0x0020 No-Break Space
     {0x00,0x00,0x4F,0x00,0x00},         //   (  1)  ! - 0x0021 Exclamation Mark
     {0x00,0x07,0x00,0x07,0x00},         //   (  2)  " - 0x0022 Quotation Mark
     {0x14,0x7F,0x14,0x7F,0x14},         //   (  3)  # - 0x0023 Number Sign
     {0x24,0x2A,0x7F,0x2A,0x12},         //   (  4)  $ - 0x0024 Dollar Sign
     {0x23,0x13,0x08,0x64,0x62},         //   (  5)  % - 0x0025 Percent Sign
     {0x36,0x49,0x55,0x22,0x50},         //   (  6)  & - 0x0026 Ampersand
     {0x00,0x05,0x03,0x00,0x00},         //   (  7)  ' - 0x0027 Apostrophe
     {0x00,0x1C,0x22,0x41,0x00},         //   (  8)  ( - 0x0028 Left Parenthesis
     {0x00,0x41,0x22,0x1C,0x00},         //   (  9)  ) - 0x0029 Right Parenthesis
     {0x14,0x08,0x3E,0x08,0x14},         //   ( 10)  * - 0x002A Asterisk
     {0x08,0x08,0x3E,0x08,0x08},         //   ( 11)  + - 0x002B Plus Sign
     {0x00,0x50,0x30,0x00,0x00},         //   ( 12)  , - 0x002C Comma
     {0x08,0x08,0x08,0x08,0x08},         //   ( 13)  - - 0x002D Hyphen-Minus
     {0x00,0x60,0x60,0x00,0x00},         //   ( 14)  . - 0x002E Full Stop
     {0x20,0x10,0x08,0x04,0x02},         //   ( 15)  / - 0x002F Solidus
     {0x3E,0x51,0x49,0x45,0x3E},         //   ( 16)  0 - 0x0030 Digit Zero
     {0x00,0x42,0x7F,0x40,0x00},         //   ( 17)  1 - 0x0031 Digit One
     {0x42,0x61,0x51,0x49,0x46},         //   ( 18)  2 - 0x0032 Digit Two
     {0x21,0x41,0x45,0x4B,0x31},         //   ( 19)  3 - 0x0033 Digit Three
     {0x18,0x14,0x12,0x7F,0x10},         //   ( 20)  4 - 0x0034 Digit Four
     {0x27,0x45,0x45,0x45,0x39},         //   ( 21)  5 - 0x0035 Digit Five
     {0x3C,0x4A,0x49,0x49,0x30},         //   ( 22)  6 - 0x0036 Digit Six
     {0x01,0x71,0x09,0x05,0x03},         //   ( 23)  7 - 0x0037 Digit Seven
     {0x36,0x49,0x49,0x49,0x36},         //   ( 24)  8 - 0x0038 Digit Eight
     {0x06,0x49,0x49,0x29,0x1E},         //   ( 25)  9 - 0x0039 Dight Nine
     {0x00,0x36,0x36,0x00,0x00},         //   ( 26)  : - 0x003A Colon
     {0x00,0x56,0x36,0x00,0x00},         //   ( 27)  ; - 0x003B Semicolon
     {0x08,0x14,0x22,0x41,0x00},         //   ( 28)  < - 0x003C Less-Than Sign
     {0x14,0x14,0x14,0x14,0x14},         //   ( 29)  = - 0x003D Equals Sign
     {0x00,0x41,0x22,0x14,0x08},         //   ( 30)  > - 0x003E Greater-Than Sign
     {0x02,0x01,0x51,0x09,0x06},         //   ( 31)  ? - 0x003F Question Mark
     {0x32,0x49,0x79,0x41,0x3E},         //   ( 32)  @ - 0x0040 Commercial At
     {0x7E,0x11,0x11,0x11,0x7E},         //   ( 33)  A - 0x0041 Latin Capital Letter A
     {0x7F,0x49,0x49,0x49,0x36},         //   ( 34)  B - 0x0042 Latin Capital Letter B
     {0x3E,0x41,0x41,0x41,0x22},         //   ( 35)  C - 0x0043 Latin Capital Letter C
     {0x7F,0x41,0x41,0x22,0x1C},         //   ( 36)  D - 0x0044 Latin Capital Letter D
     {0x7F,0x49,0x49,0x49,0x41},         //   ( 37)  E - 0x0045 Latin Capital Letter E
     {0x7F,0x09,0x09,0x09,0x01},         //   ( 38)  F - 0x0046 Latin Capital Letter F
     {0x3E,0x41,0x49,0x49,0x7A},         //   ( 39)  G - 0x0047 Latin Capital Letter G
     {0x7F,0x08,0x08,0x08,0x7F},         //   ( 40)  H - 0x0048 Latin Capital Letter H
     {0x00,0x41,0x7F,0x41,0x00},         //   ( 41)  I - 0x0049 Latin Capital Letter I
     {0x20,0x40,0x41,0x3F,0x01},         //   ( 42)  J - 0x004A Latin Capital Letter J
     {0x7F,0x08,0x14,0x22,0x41},         //   ( 43)  K - 0x004B Latin Capital Letter K
     {0x7F,0x40,0x40,0x40,0x40},         //   ( 44)  L - 0x004C Latin Capital Letter L
     {0x7F,0x02,0x0C,0x02,0x7F},         //   ( 45)  M - 0x004D Latin Capital Letter M
     {0x7F,0x04,0x08,0x10,0x7F},         //   ( 46)  N - 0x004E Latin Capital Letter N

src/display.c

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Show inline comments

 //
 // Display: render menus on OLED display
 //
 #include "display.h"
 #include "gpio.h"
 #include "ssd1306/ssd1306.h"
 #include "system/stringhelpers.h"
 #include "flash.h"
 // Private function prototypes
 static void draw_setpoint(therm_status_t* status);
 // Button transition variables
 static uint8_t sw_btn_last = 0;
 static uint8_t sw_up_last = 0;
 static uint8_t sw_down_last = 0;
 static uint8_t sw_left_last = 0;
 static uint8_t sw_right_last = 0;
 // Buttonpress macros
 #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)
 // States
 static uint8_t trigger_drawsetpoint = 1;
 static int16_t last_temp = 21245;
 static int16_t last_temp_frac = 21245;
 static int16_t last_state = 123;
 static uint8_t goto_mode = MODE_HEAT;
 static uint8_t reset_mode = RESET_REBOOT;
 static char* sensor_lookup[] = {"NTC", "K  ", "E  ", "N  ", "R  ", "S  ", "T  "};
 static uint8_t toggle = 0;
 void display_1hz(void)
+{
 	toggle = !toggle;
+}
 static char updown(void)
+{
 	if(toggle)
 		return '\x8f';
 	else
 		return '\x90';
+}
 // Display state machine
 void display_process(void)
+{
 	therm_status_t* status = runtime_status();
 	therm_settings_t* set = flash_getsettings();
     uint8_t state_changed = status->state != last_state;
     last_state = status->state;
     uint8_t temp_changed = status->temp != last_temp;
     last_temp = status->temp;
     uint8_t sw_btn = !HAL_GPIO_ReadPin(SW_BTN);
     uint8_t sw_up = !HAL_GPIO_ReadPin(SW_UP);
     uint8_t sw_down = !HAL_GPIO_ReadPin(SW_DOWN);
     uint8_t sw_left = !HAL_GPIO_ReadPin(SW_LEFT);
     uint8_t sw_right = !HAL_GPIO_ReadPin(SW_RIGHT);
     switch(status->state)
+    {
         // Idle state
         case STATE_IDLE:
+        {
             // Write text to OLED
             // [ therm :: idle ]
             ssd1306_drawstring("therm \x87 idle ", 0, 40);
             status->pid_enabled = 0;
             if(temp_changed || state_changed) {
                 char tempstr[16];
                 snprintf(tempstr, 16, "Temp: %g", status->temp);
                 ssd1306_drawstring("             ", 3, 40);
                 snprintf(tempstr, 16, "Temp: %6.1f", status->temp);
 //                ssd1306_drawstring("             ", 3, 40);
                 ssd1306_drawstring(tempstr, 3, 40);
+            }
             if (state_changed) {
             	ssd1306_drawlogo();
+            }
             switch(goto_mode) {
                 case MODE_HEAT:
+                {
 					if(set->val.plant_type == PLANT_HEATER)
 						ssd1306_drawstring("\x83 heat      ", 1, 40);
 					else
 						ssd1306_drawstring("\x83 cool      ", 1, 40);
                 } break;
                 case MODE_SETUP:
+                {
                     ssd1306_drawstring("\x83 setup    ", 1, 40);
                 } break;
                 case MODE_RESET:
+                {
                     ssd1306_drawstring("\x83 reset    ", 1, 40);
                 } break;
 				#ifdef BOOTLOADER_SHORTCUT
                 case MODE_BOOTLOADER:
+                {
                     ssd1306_drawstring("\x83 dfu      ", 1, 40);
+                }
 				#endif
+            }
             // Button handler
             if(SW_BTN_PRESSED) {
                 switch(goto_mode) {
                     case MODE_HEAT:
                         status->state = STATE_PREHEAT;
                         break;
                     case MODE_SETUP:
                         status->state = STATE_SETSENSORTYPE;
                         break;
                     case MODE_RESET:
                         status->state = STATE_RESET;
                         reset_mode = RESET_REBOOT;
                         break;
 					#ifdef BOOTLOADER_SHORTCUT
                     case MODE_BOOTLOADER:
                         ssd1306_clearscreen();
                         ssd1306_drawstring("Bootloader Entered", 0, 0);
                         ssd1306_drawstring("Device won't boot", 2, 0);
                         ssd1306_drawstring("until reflashed!", 3, 0);
 //                        bootloader_enter(); // Resets into bootloader
                         status->state = STATE_RESET; // Just in case
                         break;
 					#endif
                     default:
                         status->state = STATE_PREHEAT;
+                }
+            }
             else if(SW_DOWN_PRESSED && goto_mode < (MODE_SIZE - 1)) {
                 goto_mode++;
+            }
             else if(SW_UP_PRESSED && goto_mode > 0) {
                 goto_mode--;
+            }
             // Event Handler
             // N/A
         } break;
         case STATE_SETSENSORTYPE:
+        {
             // Write text to OLED
             // [ therm :: set mode ]
             // [ m =          ]
             ssd1306_drawstring("Sensor Type", 0, 40);
             ssd1306_drawlogo();
             ssd1306_drawchar(updown(), 1, 52);
 			ssd1306_drawstring(sensor_lookup[set->val.sensor_type], 1, 60);
             ssd1306_drawstring("Press to accept", 3, 40);
             // Button handler
             if(SW_BTN_PRESSED) {
                 status->state = STATE_SETMODE;
+            }
             else

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