[stm32] Fix ADC temperature sensor for F030 and F070 devices

Author: chris-durand

src/modm/platform/adc/stm32f0/adc.hpp.in

@@ -316,11 +316,16 @@ public:
 public:
 	static constexpr uint8_t TS_CAL1_TEMP{30};
 %% if target.family in ["f0"]
-	static constexpr uint8_t TS_CAL2_TEMP{110};
 	static constexpr uint16_t VDDA_CAL{3300};
 	static inline volatile uint16_t *const VREFINT_CAL{(volatile uint16_t *)0x1FFF'F7BA};
 	static inline volatile uint16_t *const TS_CAL1{(volatile uint16_t *)0x1FFF'F7B8};
+%% if target.name in ["30", "70"]
+	// defined in F030 reference manual
+	static constexpr uint16_t TS_AVG_SLOPE{5336};
+%% else
+	static constexpr uint8_t TS_CAL2_TEMP{110};
 	static inline volatile uint16_t *const TS_CAL2{(volatile uint16_t *)0x1FFF'F7C2};
+%% endif
 %% else
 	static constexpr uint8_t TS_CAL2_TEMP{130};
 	static constexpr uint16_t VDDA_CAL{3000};

src/modm/platform/adc/stm32f0/adc_impl.hpp.in

@@ -245,8 +245,13 @@ modm::platform::Adc{{ id }}::readTemperature(uint16_t Vref)
 	// Sample time must be at least 5us!!!
 	const int32_t TS_DATA = readChannel(Channel::Temperature);
 
+%% if target.family == "f0" and target.name in ["30", "70"]
+	const int32_t value = (int32_t(*TS_CAL1) - (TS_DATA * Vref / VDDA_CAL)) * 1000;
+	return value / TS_AVG_SLOPE + TS_CAL1_TEMP;
+%% else
 	const int32_t value = int32_t(TS_CAL2_TEMP - TS_CAL1_TEMP) * (TS_DATA * Vref / VDDA_CAL - *TS_CAL1);
 	return value / (*TS_CAL2 - *TS_CAL1) + TS_CAL1_TEMP;
+%% endif
 }
 
 uint16_t