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tests: drivers: adc: support sampling more than 2 channels with test

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Support sampling more than 2 channels using the ADC API test. This
requires updates to the repeated samplings test, which samples using 2
channels even when more channels are defined by the ADC test overlay.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2023-07-11 23:15:11 +00:00 • committed by Fabio Baltieri
commit 77998b2171
2 changed files with 30 additions and 6 deletions
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32
tests/drivers/adc/adc_api/boards/lpcxpresso55s69_cpu0.overlay
View file

@ -8,7 +8,7 @@
/ {
zephyr,user {
io-channels = <&adc0 0>, <&adc0 1>;
io-channels = <&adc0 0>, <&adc0 1>, <&adc0 2>;
};
};
@ -16,21 +16,45 @@
#address-cells = <1>;
#size-cells = <0>;
/*
* Channel 0 is used in single ended mode, with 12 bit resolution
* CH0A is routed to P19 pin 4
*/
channel@0 {
reg = <0>;
zephyr,gain = "ADC_GAIN_1";
zephyr,reference = "ADC_REF_EXTERNAL0";
zephyr,vref-mv = <3300>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,resolution = <12>;
zephyr,input-positive = <MCUX_LPADC_CH0A>;
zephyr,resolution = <13>;
zephyr,input-positive = <MCUX_LPADC_CH0A>;
};
/*
* Channel 1 is used in single ended mode, with 16 bit resolution
* CH4A is routed to P17 pin 19
*/
channel@1 {
reg = <1>;
zephyr,gain = "ADC_GAIN_1";
zephyr,reference = "ADC_REF_EXTERNAL0";
zephyr,vref-mv = <3300>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,resolution = <16>;
zephyr,input-positive = <MCUX_LPADC_CH4A>;
};
/*
* Channel 2 is used in single ended mode, with 12 bit resolution
* CH4B is routed to P18 pin 1
*/
channel@2 {
reg = <2>;
zephyr,gain = "ADC_GAIN_1";
zephyr,reference = "ADC_REF_EXTERNAL0";
zephyr,vref-mv = <3300>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,resolution = <12>;
zephyr,input-positive = <MCUX_LPADC_CH1A>;
zephyr,input-positive = <MCUX_LPADC_CH4B>;
};
};

4
tests/drivers/adc/adc_api/src/test_adc.c
View file

@ -261,12 +261,12 @@ static enum adc_action repeated_samplings_callback(const struct device *dev,
++m_samplings_done;
TC_PRINT("%s: done %d\n", __func__, m_samplings_done);
if (m_samplings_done == 1U) {
check_samples(adc_channels_count);
check_samples(MIN(adc_channels_count, 2));
/* After first sampling continue normally. */
return ADC_ACTION_CONTINUE;
} else {
check_samples(2 * adc_channels_count);
check_samples(2 * MIN(adc_channels_count, 2));
/*
* The second sampling is repeated 9 times (the samples are