use PT1000 lookup logic

source/Core/BSP/Sequre/Pins.h

@@ -75,14 +75,11 @@
 
 #define KEY_B_Pin       GPIO_PIN_1
 #define KEY_B_GPIO_Port GPIOB
-#define TMP36_INPUT_Pin       GPIO_PIN_5
-#define TMP36_INPUT_GPIO_Port GPIOA
-#define TMP36_ADC1_CHANNEL    ADC_CHANNEL_5
-#define TMP36_ADC2_CHANNEL    ADC_CHANNEL_5
-#define TIP_TEMP_Pin          GPIO_PIN_0
+// No cold junction compensation as its a PT1000
+#define TIP_TEMP_Pin          GPIO_PIN_5
 #define TIP_TEMP_GPIO_Port    GPIOA
-#define TIP_TEMP_ADC1_CHANNEL ADC_CHANNEL_0
-#define TIP_TEMP_ADC2_CHANNEL ADC_CHANNEL_0
+#define TIP_TEMP_ADC1_CHANNEL ADC_CHANNEL_5
+#define TIP_TEMP_ADC2_CHANNEL ADC_CHANNEL_5
 #define VIN_Pin               GPIO_PIN_4
 #define VIN_GPIO_Port         GPIOA
 #define VIN_ADC1_CHANNEL      ADC_CHANNEL_4

source/Core/BSP/Sequre/Setup.cpp

@@ -63,6 +63,7 @@ void        Setup_HAL() {
 }
 
 uint16_t getADCHandleTemp(uint8_t sample) {
+#ifdef TMP36_ADC1_CHANNEL
   static history<uint16_t, ADC_FILTER_LEN> filter = {{0}, 0, 0};
   if (sample) {
     uint32_t sum = 0;
@@ -72,6 +73,9 @@ uint16_t getADCHandleTemp(uint8_t sample) {
     filter.update(sum);
   }
   return filter.average() >> 1;
+#else
+  return 0;
+#endif
 }
 
 uint16_t getADCVin(uint8_t sample) {
@@ -165,13 +169,19 @@ static void MX_ADC1_Init(void) {
   hadc1.Init.NbrOfConversion       = 1;
   HAL_ADC_Init(&hadc1);
 
-  /**Configure Regular Channel
+/**Configure Regular Channel
  */
+#ifdef TMP36_ADC1_CHANNEL
   sConfig.Channel      = TMP36_ADC1_CHANNEL;
   sConfig.Rank         = ADC_REGULAR_RANK_1;
   sConfig.SamplingTime = ADC_SAMPLETIME_71CYCLES_5;
   HAL_ADC_ConfigChannel(&hadc1, &sConfig);
-
+#else
+  sConfig.Channel      = VIN_ADC1_CHANNEL; // Filler
+  sConfig.Rank         = ADC_REGULAR_RANK_1;
+  sConfig.SamplingTime = ADC_SAMPLETIME_71CYCLES_5;
+  HAL_ADC_ConfigChannel(&hadc1, &sConfig);
+#endif
   /**Configure Injected Channel
    */
   // F in = 10.66 MHz

source/Core/BSP/Sequre/ThermoModel.cpp

@@ -8,9 +8,78 @@
 #include "Utils.h"
 #include "configuration.h"
 
-#ifdef TEMP_uV_LOOKUP_PT100_1K_PULLUP
+#ifdef TEMP_uV_LOOKUP_PT1000
+// Use https://br.flukecal.com/pt100-table-generator to make table for resistance to temp
+const int32_t ohmsToDegC[] = {
+    //
+    //  Resistance (ohms x10)	Temperature (Celsius)
+
+    10000, 0,   //
+    10390, 10,  //
+    10779, 20,  //
+    11167, 30,  //
+    11554, 40,  //
+    11940, 50,  //
+    12324, 60,  //
+    12708, 70,  //
+    13090, 80,  //
+    13471, 90,  //
+    13851, 100, //
+    14229, 110, //
+    14607, 120, //
+    14983, 130, //
+    15358, 140, //
+    15733, 150, //
+    16105, 160, //
+    16477, 170, //
+    16848, 180, //
+    17217, 190, //
+    17586, 200, //
+    17953, 210, //
+    18319, 220, //
+    18684, 230, //
+    19047, 240, //
+    19410, 250, //
+    19771, 260, //
+    20131, 270, //
+    20490, 280, //
+    20848, 290, //
+    21205, 300, //
+    21561, 310, //
+    21915, 320, //
+    22268, 330, //
+    22621, 340, //
+    22972, 350, //
+    23321, 360, //
+    23670, 370, //
+    24018, 380, //
+    24364, 390, //
+    24709, 400, //
+    25053, 410, //
+    25396, 420, //
+    25738, 430, //
+    26078, 440, //
+    26418, 450, //
+    26756, 460, //
+    27093, 470, //
+    27429, 480, //
+    27764, 490, //
+    28098, 500, //
+
+};
+
+TemperatureType_t TipThermoModel::convertuVToDegC(uint32_t tipuVDelta) {
+
+  // 3.3V -> 1K ->(ADC) <- PT1000 <- GND
+  // PT100 = (adc*r1)/(3.3V-adc)
+  uint32_t reading_mv     = tipuVDelta / 1000;
+  uint32_t resistance_x10 = (reading_mv * 10000) / (3300 - reading_mv);
+
+  return Utils::InterpolateLookupTable(ohmsToDegC, sizeof(ohmsToDegC) / (2 * sizeof(int32_t)), resistance_x10);
+}
+
+#endif // TEMP_uV_LOOKUP_PT1000
 
-#endif // TEMP_uV_LOOKUP_PT100_1K_PULLUP
 #ifdef TEMP_uV_LOOKUP_S60
 TemperatureType_t TipThermoModel::convertuVToDegC(uint32_t tipuVDelta) { return (tipuVDelta * 50) / 485; }
 #endif // TEMP_uV_LOOKUP_S60

source/Core/BSP/Sequre/configuration.h

@@ -212,7 +212,7 @@
 #define MAX_POWER_LIMIT    70
 #define POWER_LIMIT_STEPS  5
 #define OP_AMP_GAIN_STAGE  536
-#define TEMP_uV_LOOKUP_PT100_1K_PULLUP
+#define TEMP_uV_LOOKUP_PT1000
 #define USB_PD_VMAX       20 // Maximum voltage for PD to negotiate
 #define NO_DISPLAY_ROTATE    // Disable OLED rotation by accel
 

source/Core/BSP/Sequre/stm32f1xx_hal_msp.c

@@ -56,12 +56,15 @@ void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc) {
      PB0     ------> ADC2_IN8
      PB1     ------> ADC2_IN9
      */
+
     GPIO_InitStruct.Pin  = TIP_TEMP_Pin;
     GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
     HAL_GPIO_Init(TIP_TEMP_GPIO_Port, &GPIO_InitStruct);
+#ifdef TMP36_INPUT_Pin
     GPIO_InitStruct.Pin  = TMP36_INPUT_Pin;
     GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
     HAL_GPIO_Init(TMP36_INPUT_GPIO_Port, &GPIO_InitStruct);
+#endif
     GPIO_InitStruct.Pin  = VIN_Pin;
     GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
     HAL_GPIO_Init(VIN_GPIO_Port, &GPIO_InitStruct);