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adc: fix CPU temperature read for STM32F76x/77x (#2020)

This commit is contained in:
Andrey G 2020-12-05 17:58:23 +03:00 committed by GitHub
parent 2fb3767ae7
commit 852fdcd4d1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 2 deletions
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18
firmware/hw_layer/adc/adc_inputs.cpp
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@ -143,7 +143,10 @@ static ADCConversionGroup adcgrpcfgSlow = {
ADC_SMPR1_SMP_AN13(ADC_SAMPLING_SLOW) |
ADC_SMPR1_SMP_AN14(ADC_SAMPLING_SLOW) |
ADC_SMPR1_SMP_AN15(ADC_SAMPLING_SLOW) |
ADC_SMPR1_SMP_SENSOR(ADC_SAMPLE_144),
#if defined(STM32F7XX)
ADC_SMPR1_SMP_VBAT(ADC_SAMPLE_144) | /* input18 - temperature and vbat input on some STM32F7xx */
#endif
ADC_SMPR1_SMP_SENSOR(ADC_SAMPLE_144), /* input16 - temperature sensor input on STM32F4xx */
// In this field must be specified the sample times for channels 0...9
.smpr2 =
ADC_SMPR2_SMP_AN0(ADC_SAMPLING_SLOW) |
@ -254,7 +257,7 @@ float getMCUInternalTemperature() {
TemperatureValue += 25.0; // Add the 25 deg C
if (TemperatureValue > 150.0f || TemperatureValue < -50.0f) {
firmwareError(OBD_PCM_Processor_Fault, "Invalid CPU temperature measured!");
firmwareError(OBD_PCM_Processor_Fault, "Invalid CPU temperature measured %f", TemperatureValue);
}
return TemperatureValue;
@ -356,6 +359,11 @@ void AdcDevice::enableChannel(adc_channel_e hwChannel) {
int logicChannel = channelCount++;
size_t channelAdcIndex = hwChannel - 1;
#if defined(STM32F7XX)
/* the temperature sensor is internally connected to ADC1_IN18 */
if (hwChannel == EFI_ADC_TEMP_SENSOR)
channelAdcIndex = 18;
#endif
internalAdcIndexByHardwareIndex[hwChannel] = logicChannel;
hardwareIndexByIndernalAdcIndex[logicChannel] = hwChannel;
@ -605,6 +613,12 @@ void initAdcInputs() {
adcStart(&ADC_SLOW_DEVICE, NULL);
adcStart(&ADC_FAST_DEVICE, NULL);
adcSTM32EnableTSVREFE(); // Internal temperature sensor
#if defined(STM32F7XX)
/* the temperature sensor is internally
* connected to the same input channel as VBAT. Only one conversion,
* temperature sensor or VBAT, must be selected at a time. */
adcSTM32DisableVBATE();
#endif
/* Enable this code only when you absolutly sure
* that there is no possible errors from ADC */