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Merge pull request #20778 from krzysztof-cabaj/nucleo-l452re-ADC

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boards/nucleo-l452re: add ADC
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Dylan Laduranty 2024-07-08 08:17:21 +00:00 committed by GitHub
commit 55a35c52f6
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1
boards/nucleo-l452re/Makefile.features
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@ -2,6 +2,7 @@ CPU = stm32
CPU_MODEL = stm32l452re
# Put defined MCU peripherals here (in alphabetical order)
FEATURES_PROVIDED += periph_adc
FEATURES_PROVIDED += periph_i2c
FEATURES_PROVIDED += periph_pwm
FEATURES_PROVIDED += periph_rtc

51
boards/nucleo-l452re/include/periph_conf.h
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@ -120,6 +120,57 @@ static const spi_conf_t spi_config[] = {
#define SPI_NUMOF ARRAY_SIZE(spi_config)
/** @} */
/**
* @brief ADC configuration
*
* Note that we do not configure all ADC channels,
* and not in the STM32L452RE order. Instead, we
* just define 6 ADC channels, for the Nucleo
* Arduino header pins A0-A5 and the internal VBAT channel.
*
* To find appropriate device and channel find in the
* board manual, table showing pin assignments and
* information about ADC - a text similar to ADC[X]_IN[Y],
* where:
* [X] - describes used device - indexed from 0,
* for example ADC1_IN10 is device 0,
* [Y] - describes used channel - indexed from 1,
* for example ADC1_IN10 is channel 10
*
* For Nucleo-L452RE this information is in board manual,
* Table 22, page 51, or STM32L452RE MCU datasheet,
* Table 16, page 63.
*
* VBAT is connected ADC1_IN18 or ADC3_IN18 and a voltage divider
* is used, so that only 1/3 of the actual VBAT is measured. This
* allows for a supply voltage higher than the reference voltage.
*
* For STM32L452RE more information is provided in MCU datasheet,
* in section 3.15.3 - Vbat battery voltage monitoring, page 40.
* @{
*/
static const adc_conf_t adc_config[] = {
{ .pin = GPIO_PIN(PORT_A, 0), .dev = 0, .chan = 5 }, /* A0 ADC1_IN5 */
{ .pin = GPIO_PIN(PORT_A, 1), .dev = 0, .chan = 6 }, /* A1 ADC1_IN6 */
{ .pin = GPIO_PIN(PORT_A, 4), .dev = 0, .chan = 9 }, /* A2 ADC1_IN9 */
{ .pin = GPIO_PIN(PORT_B, 0), .dev = 0, .chan = 15 }, /* A3 ADC1_IN15 */
{ .pin = GPIO_PIN(PORT_C, 1), .dev = 0, .chan = 2 }, /* A4 ADC1_IN2 */
{ .pin = GPIO_PIN(PORT_C, 0), .dev = 0, .chan = 1 }, /* A5 ADC1_IN1 */
{ .pin = GPIO_UNDEF, .dev = 0, .chan = 18 },
};
/**
* @brief Number of ADC devices
*/
#define ADC_NUMOF ARRAY_SIZE(adc_config)
/**
* @brief VBAT ADC line
*/
#define VBAT_ADC ADC_LINE(6)
/** @} */
#ifdef __cplusplus
}
#endif