add calculations of T & P by ADC; Release mode still have problems

F3:F303/NitrogenFlooding/BMP280.c

@@ -197,6 +197,7 @@ static int write_reg(uint8_t reg, uint8_t val){
 
 // read compensation data & write registers
 int BMP280_init(){
+    IWDG->KR = IWDG_REFRESH;
     DBG("INI:\n");
     if(!read_reg(BMP280_REG_ID, &params.ID)){
         DBG("Can't get ID\n");

F3:F303/NitrogenFlooding/adc.c

@@ -17,6 +17,7 @@
  */
 
 #include "adc.h"
+#include "hardware.h" // ADCvals
 
 /**
  * @brief ADCx_array - arrays for ADC channels with median filtering:
@@ -65,6 +66,7 @@ TRUE_INLINE void enADC(ADC_TypeDef *chnl){
  */
 // Setup ADC
 void adc_setup(){
+    IWDG->KR = IWDG_REFRESH;
     RCC->AHBENR |= RCC_AHBENR_ADC12EN; //  Enable clocking
     ADC12_COMMON->CCR = ADC_CCR_TSEN | ADC_CCR_CKMODE; // enable Tsens, HCLK/4
     calADC(ADC1);
@@ -128,19 +130,68 @@ uint16_t getADCval(int nch){
 }
 
 // get voltage @input nch (V)
-float getADCvoltage(int nch){
+float getADCvoltage(uint16_t ADCval){
-    float v = getADCval(nch) * 3.3;
+    float v = (float)ADCval * 3.3;
-    v /= 4096.f; // 12bit ADC
+    return v/4096.f; // 12bit ADC
-    return v;
 }
 
 // return MCU temperature (degrees of celsius)
 float getMCUtemp(){
-    // make correction on Vdd value
+    float temperature = ADCvals[ADC_TSENS] - (float) *TEMP30_CAL_ADDR;
-    int32_t ADval = getADCval(ADC_TSENS);
-    float temperature = ADval - (float) *TEMP30_CAL_ADDR;
     temperature *= (110.f - 30.f);
     temperature /= (float)(*TEMP110_CAL_ADDR - *TEMP30_CAL_ADDR);
     temperature += 30.f;
     return(temperature);
 }
+
+// calculate R (Ohms) by given `ADCval` for main 10 ADC channels with 1k in upper arm of divider
+float calcR(uint16_t ADCval){
+    return 1000.f/(4096.f/((float)ADCval) - 1.f);
+}
+
+/****** R(T, K):
+T -= 273.15; % convert to K
+_A = 3.9083e-03;
+_B = -5.7750e-07;
+_C = 0.;
+if(T < 0.); _C = -4.1830e-12; endif
+R = 1000.*(1 + _A*T + _B*T.^2 - _C.*T.^3*100. + _C.*T.^4);
+
+=====> for T=[70:400] Kelvins
+
+function T = pt1000Tapp(R)
+	k1 = 27.645;
+	k2 = 0.235268;
+	k3 = 1.0242e-05;
+	k4 = 0.;
+	if(R < 1000)
+		k1 = 31.067;
+		k2 = 2.2272e-01;
+		k3 = 2.5251e-05;
+		k4 = -5.9001e-09;
+	endif
+	T = k1 + k2*R + k3*R.^2 + k4*R.^3;
+endfunction
+
+mean(T-Tapp)= -3.3824e-04
+std(T-Tapp')= 3.2089e-03
+max(abs(T-Tapp'))= 0.011899
+
+********/
+
+// approximate calculation of T (K) for platinum 1k PTC
+float calcT(uint16_t ADCval){
+    float R = calcR(ADCval);
+    if(R < 1000.){
+        return (31.067 + R * (2.2272e-01 + R * (2.5251e-05 - R * 5.9001e-09)));
+    }
+    return (27.645 + R * (0.235268 + R * 1.0242e-05));
+}
+
+// MPX5050: V=VS(P x 0.018 + 0.04); for 3v3 ADU=4096(P*0.018+0.04) ====>
+// 0.018P=ADU/4096-0.04,
+// P(kPa) = 55.556*(ADU/4096-0.04)
+float calcPres5050(){
+    float adu = (float)ADCvals[ADC_EXT]/4096. - 0.04;
+    return 55.556*adu;
+}

F3:F303/NitrogenFlooding/adc.h

@@ -47,7 +47,14 @@
 // starting index of ADC2
 #define ADC2START   (9*NUMBER_OF_ADC1_CHANNELS)
 
+// ADC level for not connected TRD
+#define ADC_NOCONN  (4000)
+
 void adc_setup();
 float getMCUtemp();
 uint16_t getADCval(int nch);
-float getADCvoltage(int nch);
+float getADCvoltage(uint16_t ADCval);
+
+float calcR(uint16_t ADCval);
+float calcT(uint16_t ADCval);
+float calcPres5050();

F3:F303/NitrogenFlooding/hardware.c

@@ -108,7 +108,7 @@ TRUE_INLINE void pwm_setup(){
 }
 
 #ifndef EBUG
-TRUE_INLINE void iwdg_setup(){
+void iwdg_setup(){
     uint32_t tmout = 16000000;
     /* Enable the peripheral clock RTC */
     /* (1) Enable the LSI (40kHz) */
@@ -135,11 +135,10 @@ TRUE_INLINE void iwdg_setup(){
 void hw_setup(){
     RCC->AHBENR |= RCC_AHBENR_DMA1EN | RCC_AHBENR_DMA2EN;
     gpio_setup();
+    IWDG->KR = IWDG_REFRESH;
     i2c_setup(HIGH_SPEED);
+    IWDG->KR = IWDG_REFRESH;
     pwm_setup();
-#ifndef EBUG
-    iwdg_setup();
-#endif
 }
 
 void setPWM(int nch, uint16_t val){

F3:F303/NitrogenFlooding/hardware.h

@@ -120,3 +120,7 @@ void hw_setup();
 
 void setPWM(int nch, uint16_t val);
 uint16_t getPWM(int nch);
+
+#ifndef EBUG
+void iwdg_setup();
+#endif

F3:F303/NitrogenFlooding/i2c.c

@@ -42,6 +42,7 @@ static uint8_t I2Cbuf[256], i2cbuflen = 0; // buffer for DMA tx/rx and its len
 static inline int isI2Cbusy(){
     cntr = Tms;
     do{
+        IWDG->KR = IWDG_REFRESH;
         if(Tms - cntr > I2C_TIMEOUT){ USND("Timeout, DMA transfer in progress?"); return 1;}
     }while(I2Cbusy);
     return 0;

F3:F303/NitrogenFlooding/main.c

@@ -89,6 +89,9 @@ int main(void){
     BMP280_setup(0);
     BMP280_start();
     USBPU_ON();
+#ifndef EBUG
+    iwdg_setup();
+#endif
     // CAN_message *can_mesg;
     while(1){
         IWDG->KR = IWDG_REFRESH;

F3:F303/NitrogenFlooding/menu.c

@@ -106,23 +106,60 @@ static void refresh_adcwin(btnevtmask evtmask){
     if(evtmask) return;
     cls();
     SetFontScale(1);
-    int Y = fontheight + 1, wmax = 0;
+    int Y0 = fontheight*2 + 5; // output
+    int X, Y = Y0, Xstart = 20, Xraw = 0, XR = 0, XK = 0;
     setFGcolor(COLOR_CYAN);
     for(int i = 0; i < NUMBER_OF_AIN_CHANNELS; ++i, Y+=fontheight+2){
-        int X = 20;
+        //X = PutStringAt(X, Y, "ADC input ");
-        X = PutStringAt(X, Y, "ADC input ");
+        X = PutStringAt(Xstart, Y, u2str(i));
-        X = PutStringAt(X, Y, u2str(i));
+        if(X > Xraw) Xraw = X;
-        if(X > wmax) wmax = X;
     }
-    wmax += 20;
+    Xraw += 20; // Xraw - starting X for text 'RAW'
-    setFGcolor(COLOR_WHITE);
+    Y = Y0;
-    Y = fontheight + 1;
+    setFGcolor(COLOR_LIGHTBLUE);
+    // RAW values
     for(int i = 0; i < NUMBER_OF_AIN_CHANNELS; ++i, Y+=fontheight+2){
-        PutStringAt(wmax, Y, u2str(ADCvals[i]));
+        X = PutStringAt(Xraw, Y, u2str(ADCvals[i]));
+        if(X > XR) XR = X;
     }
+    XR += 20; // XR - starting X for text 'R, Ohm'
+    Y = Y0;
     setFGcolor(COLOR_LIGHTGREEN);
+    // R in Ohms
+    for(int i = 0; i < NUMBER_OF_AIN_CHANNELS; ++i, Y+=fontheight+2){
+        if(ADCvals[i] > ADC_NOCONN) X = PutStringAt(XR, Y, "NC");
+        else X = PutStringAt(XR, Y, float2str(calcR(ADCvals[i]), 3));
+        if(X > XK) XK = X;
+    }
+    Y = Y0;
+    XK += 20; // XK - starting X for text 'T, K'
+    // T in K
+    for(int i = 0; i < NUMBER_OF_AIN_CHANNELS; ++i, Y+=fontheight+2){
+        if(ADCvals[i] < ADC_NOCONN){
+            float K = calcT(ADCvals[i]);
+            setFGcolor(COLOR_YELLOW);
+            PutStringAt(XK, Y, float2str(K, 1));
+            setFGcolor(COLOR_GOLD);
+            PutStringAt(XK+80, Y, float2str(K-273.15, 1));
+        }
+    }
+    setFGcolor(COLOR_BLUE);
+    Y0 = fontheight + 1;
+    // print header
+    PutStringAt(Xstart, Y0, "#");
+    PutStringAt(Xraw, Y0, "Raw");
+    PutStringAt(XR, Y0, "R, Ohm");
+    PutStringAt(XK, Y0, "T, K");
+    PutStringAt(XK+80, Y0, "degC");
+    setFGcolor(COLOR_CHOCOLATE);
     Y += 5;
-    PutStringAt(20, Y, "ADC ext"); PutStringAt(wmax, Y, u2str(ADCvals[ADC_EXT]));
+    PutStringAt(Xstart, Y, "P"); PutStringAt(Xraw, Y, u2str(ADCvals[ADC_EXT]));
+    float P = calcPres5050();
+    if(P > 30) setFGcolor(COLOR_RED);
+    else if(P > 10) setFGcolor(COLOR_YELLOW);
+    else setFGcolor(COLOR_GREEN);
+    X = PutStringAt(XR, Y, float2str(P, 1));
+    PutStringAt(X+16, Y, "kPa");
     //setFGcolor(COLOR_LIGHTYELLOW);
     //Y += 2 + fontheight;
     //PutStringAt(20, Y, "T MCU"); PutStringAt(wmax, Y, float2str(getMCUtemp(), 0));

F3:F303/NitrogenFlooding/version.inc

@@ -1,2 +1,2 @@
-#define BUILD_NUMBER "294"
+#define BUILD_NUMBER "300"
-#define BUILD_DATE "2023-05-14"
+#define BUILD_DATE "2023-05-15"