boards/b-l072z-lrwan1: add missing adc feature

[gzordrai]

Contribution description

This pull request adds the missing ADC feature for the b-l072z-lrwan1 board.

Testing procedure

I took a boards/b-l072z-lrwan1 board and added USEMODULE += periph_adc to the Makefile.
I connected an analog sensor to the A0, A2, and PA5 ports (ADCIN_0, ADCIN_4 and ADCIN_5) and checked if I could read values correctly.
ADCIN_2 and ADCIN_3 are used by ST-Link, but I can still read values from them.

#include <stdio.h>
#include <string.h>

#include "periph/adc.h"

#define NUM_LINES 5

int main(void)
{
    adc_t lines[NUM_LINES];
    int sample;

    for (int i = 0; i < NUM_LINES; i++)
        lines[i] = ADC_LINE(i);

    while (1)
    {
        for (int i = 0; i < NUM_LINES; i++) {
            sample = adc_sample(lines[i], ADC_RES_12BIT);

            printf("Sample (%i): %i\n", i, sample);
        }
    }

    return 0;
}

Output:

2024-06-06 02:02:08,260 # Sample (0): 2374
2024-06-06 02:02:08,261 # Sample (1): 4095
2024-06-06 02:02:08,263 # Sample (2): 4047
2024-06-06 02:02:08,264 # Sample (3): 372
2024-06-06 02:02:08,266 # Sample (4): 45
2024-06-06 02:02:08,267 # Sample (0): 2373
2024-06-06 02:02:08,269 # Sample (1): 4095
2024-06-06 02:02:08,270 # Sample (2): 4050
2024-06-06 02:02:08,272 # Sample (3): 370
2024-06-06 02:02:08,273 # Sample (4): 48

Issues/PRs references

Resolve 20732.

[riot-ci]

Murdock results

✔️ PASSED

c6d7b13 boards/b-l072z-lrwan1: add missing adc feature

Success	Failures	Total	Runtime
550	0	550	04m:40s

Artifacts

• Documentation preview