michaelh/zephyr
1
0
Fork 0
Code Releases Activity

sensors: STM32: Prepare for different handling of temp conversions

Browse source 
moving the conversion from adc value to the get function
which will be used for different handling of stm32 temp sensors

Signed-off-by: Wouter Cappelle <wouter.cappelle@crodeon.com>
This commit is contained in:
Wouter Cappelle 2022-01-10 17:38:20 +01:00 • committed by Carles Cufí
commit c9e7ca3cac
1 changed files with 6 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

11
drivers/sensor/stm32_temp/stm32_temp.c
View file

@ -20,7 +20,7 @@ struct stm32_temp_data {
struct adc_sequence adc_seq;
struct k_mutex mutex;
int16_t sample_buffer;
int32_t mv; /* Sensor value in millivolts */
int16_t raw; /* raw adc Sensor value */
};
struct stm32_temp_config {
@ -33,7 +33,6 @@ struct stm32_temp_config {
static int stm32_temp_sample_fetch(const struct device *dev,
enum sensor_channel chan)
{
const struct stm32_temp_config *cfg = dev->config;
struct stm32_temp_data *data = dev->data;
struct adc_sequence *sp = &data->adc_seq;
int rc;
@ -47,7 +46,7 @@ static int stm32_temp_sample_fetch(const struct device *dev,
rc = adc_read(data->adc, sp);
sp->calibrate = false;
if (rc == 0) {
data->mv = data->sample_buffer * cfg->tsv_mv / 0x0FFF;
data->raw = data->sample_buffer;
}
k_mutex_unlock(&data->mutex);
@ -67,10 +66,12 @@ static int stm32_temp_channel_get(const struct device *dev,
return -ENOTSUP;
}
int32_t mv = data->raw * cfg->tsv_mv / 0x0FFF; /* Sensor value in millivolts */
if (cfg->is_ntc) {
temp = (float)(cfg->v25_mv - data->mv);
temp = (float)(cfg->v25_mv - mv);
} else {
temp = (float)(data->mv - cfg->v25_mv);
temp = (float)(mv - cfg->v25_mv);
}
temp = (temp/cfg->avgslope)*10;
temp += 25;