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Merge pull request #375 from dhylands/stmhal-adc

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Some changes that I forgot to push with my last pull request
This commit is contained in:
Damien George 2014-03-25 10:31:28 +00:00
commit 24d527bf22
2 changed files with 33 additions and 4 deletions
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26
stmhal/adc.c
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@ -238,18 +238,44 @@ uint32_t adc_config_and_read_channel(ADC_HandleTypeDef *adcHandle, uint32_t chan
return adc_read_channel(adcHandle);
}
int adc_get_resolution(ADC_HandleTypeDef *adcHandle) {
uint32_t res_reg = __HAL_ADC_GET_RESOLUTION(adcHandle);
switch (res_reg) {
case ADC_RESOLUTION6b: return 6;
case ADC_RESOLUTION8b: return 8;
case ADC_RESOLUTION10b: return 10;
}
return 12;
}
int adc_read_core_temp(ADC_HandleTypeDef *adcHandle) {
int32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_TEMPSENSOR);
// Note: constants assume 12-bit resolution, so we scale the raw value to
// be 12-bits.
raw_value <<= (12 - adc_get_resolution(adcHandle));
return ((raw_value - CORE_TEMP_V25) / CORE_TEMP_AVG_SLOPE) + 25;
}
float adc_read_core_vbat(ADC_HandleTypeDef *adcHandle) {
uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VBAT);
// Note: constants assume 12-bit resolution, so we scale the raw value to
// be 12-bits.
raw_value <<= (12 - adc_get_resolution(adcHandle));
return raw_value * VBAT_DIV / 4096.0f * 3.3f;
}
float adc_read_core_vref(ADC_HandleTypeDef *adcHandle) {
uint32_t raw_value = adc_config_and_read_channel(adcHandle, ADC_CHANNEL_VREFINT);
// Note: constants assume 12-bit resolution, so we scale the raw value to
// be 12-bits.
raw_value <<= (12 - adc_get_resolution(adcHandle));
return raw_value * VBAT_DIV / 4096.0f * 3.3f;
}

3
stmhal/main.c
View File

@ -373,6 +373,9 @@ soft_reset:
}
}
}
#else
// Get rid of compiler warning if no SDCARD is configured.
(void)first_soft_reset;
#endif
#if defined(USE_HOST_MODE)