chore: add STM32WB0 support to internal channel examples

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

examples/Peripherals/ADC/Internal_channels/Internal_channels.ino

@@ -27,70 +27,82 @@
 #endif
 
 #if defined(STM32C0xx)
-#define VTEMP      760
+#define VTEMP 760
 #define AVG_SLOPE 2530
-#define VREFINT   1212
+#define VREFINT 1212
 #elif defined(STM32F1xx)
-#define VTEMP     1430
+#define VTEMP 1430
 #define AVG_SLOPE 4300
-#define VREFINT   1200
+#define VREFINT 1200
 #elif defined(STM32F2xx) || defined(STM32F4xx)
-#define VTEMP      760
+#define VTEMP 760
 #define AVG_SLOPE 2500
-#define VREFINT   1210
+#define VREFINT 1210
 #endif
 
 /* Analog read resolution */
+#if defined(LL_ADC_RESOLUTION_12B)
 #define LL_ADC_RESOLUTION LL_ADC_RESOLUTION_12B
+#elif defined(LL_ADC_DS_DATA_WIDTH_12_BIT)
+#define LL_ADC_RESOLUTION LL_ADC_DS_DATA_WIDTH_12_BIT
+#else
+#error "ADC resolution could not be defined!"
+#endif
 #define ADC_RANGE 4096
 
 // the setup routine runs once when you press reset:
 void setup() {
   // initialize serial communication at 9600 bits per second:
   Serial.begin(9600);
-  while (!Serial);
+  while (!Serial)
+    ;
   analogReadResolution(12);
 }
 
-static int32_t readVref()
-{
+#ifdef AVREF
+static uint32_t readVref() {
+  uint32_t Vref = 3300;
 #ifdef STM32U0xx
   /* On some devices Internal voltage reference calibration value not programmed
      during production and return 0xFFFF. See errata sheet. */
-  if ((uint32_t)(*VREFINT_CAL_ADDR) == 0xFFFF) {
-    return 3300U;
-  }
+  if ((uint32_t)(*VREFINT_CAL_ADDR) != 0xFFFF) {
 #endif
 #ifdef __LL_ADC_CALC_VREFANALOG_VOLTAGE
 #ifdef STM32U5xx
-  return (__LL_ADC_CALC_VREFANALOG_VOLTAGE(ADC1, analogRead(AVREF), LL_ADC_RESOLUTION));
+    Vref = __LL_ADC_CALC_VREFANALOG_VOLTAGE(ADC1, analogRead(AVREF), LL_ADC_RESOLUTION);
 #else
-  return (__LL_ADC_CALC_VREFANALOG_VOLTAGE(analogRead(AVREF), LL_ADC_RESOLUTION));
+    Vref = __LL_ADC_CALC_VREFANALOG_VOLTAGE(analogRead(AVREF), LL_ADC_RESOLUTION);
 #endif
 #else
-  return (VREFINT * ADC_RANGE / analogRead(AVREF)); // ADC sample to mV
+  Vref = VREFINT * ADC_RANGE / analogRead(AVREF);  // ADC sample to mV
+#endif
+#ifdef STM32U0xx
+  }
 #endif
+  return Vref;
 }
+#endif
 
 #ifdef ATEMP
-static int32_t readTempSensor(int32_t VRef)
-{
+static int32_t readTempSensor(int32_t VRef) {
+  uint32_t temp = 0;
 #ifdef __LL_ADC_CALC_TEMPERATURE
 #ifdef STM32U5xx
-  return (__LL_ADC_CALC_TEMPERATURE(ADC1, VRef, analogRead(ATEMP), LL_ADC_RESOLUTION));
+  temp = __LL_ADC_CALC_TEMPERATURE(ADC1, VRef, analogRead(ATEMP), LL_ADC_RESOLUTION);
+#elif defined(STM32WB0x)
+  (void)VRef;
+  temp = __LL_ADC_CALC_TEMPERATURE(analogRead(ATEMP), LL_ADC_DS_DATA_WIDTH_12_BIT);
 #else
-  return (__LL_ADC_CALC_TEMPERATURE(VRef, analogRead(ATEMP), LL_ADC_RESOLUTION));
+  temp = __LL_ADC_CALC_TEMPERATURE(VRef, analogRead(ATEMP), LL_ADC_RESOLUTION);
 #endif
 #elif defined(__LL_ADC_CALC_TEMPERATURE_TYP_PARAMS)
-  return (__LL_ADC_CALC_TEMPERATURE_TYP_PARAMS(AVG_SLOPE, VTEMP, CALX_TEMP, VRef, analogRead(ATEMP), LL_ADC_RESOLUTION));
-#else
-  return 0;
+  temp = __LL_ADC_CALC_TEMPERATURE_TYP_PARAMS(AVG_SLOPE, VTEMP, CALX_TEMP, VRef, analogRead(ATEMP), LL_ADC_RESOLUTION);
 #endif
+  return temp;
 }
 #endif
 
-static int32_t readVoltage(int32_t VRef, uint32_t pin)
-{
+static int32_t readVoltage(int32_t VRef, uint32_t pin) {
 #ifdef STM32U5xx
   return (__LL_ADC_CALC_DATA_TO_VOLTAGE(ADC1, VRef, analogRead(pin), LL_ADC_RESOLUTION));
 #else
@@ -100,7 +112,7 @@ static int32_t readVoltage(int32_t VRef, uint32_t pin)
 
 // The loop routine runs over and over again forever:
 void loop() {
-#if defined(ICACHE) && defined (HAL_ICACHE_MODULE_ENABLED) && !defined(HAL_ICACHE_MODULE_DISABLED)
+#if defined(ICACHE) && defined(HAL_ICACHE_MODULE_ENABLED) && !defined(HAL_ICACHE_MODULE_DISABLED)
   bool icache_enabled = false;
   if (HAL_ICACHE_IsEnabled() == 1) {
     icache_enabled = true;
@@ -110,9 +122,15 @@ void loop() {
     }
   }
 #endif /* ICACHE && HAL_ICACHE_MODULE_ENABLED && !HAL_ICACHE_MODULE_DISABLED */
+
   // Print out the value read
+#ifdef AVREF
   int32_t VRef = readVref();
   Serial.printf("VRef(mv)= %i", VRef);
+#else
+  // No Vref fro STM32WB0xx
+  int32_t VRef = LL_ADC_VIN_RANGE_3V6;
+#endif
 #ifdef ATEMP
   Serial.printf("\tTemp(°C)= %i", readTempSensor(VRef));
 #endif
@@ -121,9 +139,8 @@ void loop() {
 #endif
   Serial.printf("\tA0(mv)= %i\n", readVoltage(VRef, A0));
   delay(200);
-#if defined(ICACHE) && defined (HAL_ICACHE_MODULE_ENABLED) && !defined(HAL_ICACHE_MODULE_DISABLED)
-  if (icache_enabled)
-  {
+#if defined(ICACHE) && defined(HAL_ICACHE_MODULE_ENABLED) && !defined(HAL_ICACHE_MODULE_DISABLED)
+  if (icache_enabled) {
     /* Re-enable instruction cache */
     if (HAL_ICACHE_Enable() != HAL_OK) {
       Error_Handler();