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samples: drivers: adc: adc_sequence: fix adc_sequence channel vref info.

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Fix wrong usage of channel adc_raw_to_millivolts on the sequence sample.

Signed-off-by: Paulo Santos <pauloroberto.santos@edge.ufal.br>
This commit is contained in:
Paulo Santos 2024-07-05 17:44:07 -03:00 committed by Anas Nashif
parent 782967a1e3
commit eeb933b531
1 changed files with 11 additions and 2 deletions
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13
samples/drivers/adc/adc_sequence/src/main.c
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@ -10,6 +10,9 @@
/* ADC node from the devicetree. */
#define ADC_NODE DT_ALIAS(adc0)
/* Auxiliary macro to obtain channel vref, if available. */
#define CHANNEL_VREF(node_id) DT_PROP_OR(node_id, zephyr_vref_mv, 0)
/* Data of ADC device specified in devicetree. */
static const struct device *adc = DEVICE_DT_GET(ADC_NODE);
@ -17,6 +20,9 @@ static const struct device *adc = DEVICE_DT_GET(ADC_NODE);
static const struct adc_channel_cfg channel_cfgs[] = {
DT_FOREACH_CHILD_SEP(ADC_NODE, ADC_CHANNEL_CFG_DT, (,))};
/* Data array of ADC channel voltage references. */
static uint32_t vrefs_mv[] = {DT_FOREACH_CHILD_SEP(ADC_NODE, CHANNEL_VREF, (,))};
/* Get the number of channels defined on the DTS. */
#define CHANNEL_COUNT ARRAY_SIZE(channel_cfgs)
@ -54,6 +60,9 @@ int main(void)
printf("Could not setup channel #%d (%d)\n", i, err);
return 0;
}
if (channel_cfgs[i].reference == ADC_REF_INTERNAL) {
vrefs_mv[i] = adc_ref_internal(adc);
}
}
#ifndef CONFIG_COVERAGE
@ -82,12 +91,12 @@ int main(void)
val_mv = channel_reading[sample_index][channel_index];
printf("- - %" PRId32, val_mv);
err = adc_raw_to_millivolts(channel_cfgs[channel_index].reference,
err = adc_raw_to_millivolts(vrefs_mv[channel_index],
channel_cfgs[channel_index].gain,
CONFIG_SEQUENCE_RESOLUTION, &val_mv);
/* conversion to mV may not be supported, skip if not */
if ((err < 0) || channel_cfgs[channel_index].reference == 0) {
if ((err < 0) || vrefs_mv[channel_index] == 0) {
printf(" (value in mV not available)\n");
} else {
printf(" = %" PRId32 "mV\n", val_mv);