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Jul 10, 2025
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chore: add STM32WB0 support to internal channel examples #64

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73 changes: 45 additions & 28 deletions examples/Peripherals/ADC/Internal_channels/Internal_channels.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand All @@ -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;
Expand All @@ -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
Expand All @@ -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();
Expand Down