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boards/nucleo-c031c6: fix ADC and enhance doc #20502

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Mar 26, 2024
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boards/nucleo-c031c6: fix ADC and enhance doc #20502

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b9b09c0
boards/nucleo-c031c6: fix ADC config
krzysztof-cabaj Mar 24, 2024
2a89402
boards/nucleo-c031c6: add MCU table to documentation page
krzysztof-cabaj Mar 25, 2024
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22 changes: 22 additions & 0 deletions boards/nucleo-c031c6/doc.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,28 @@
The Nucleo-C031C6 is a board from ST's Nucleo family supporting a ARM
Cortex-M0+ STM32C031C6 microcontroller with 12KiB of RAM and 32KiB of Flash.

### MCU

| MCU | STM32C031C6 |
|:---------- |:------------------- |
| Family | ARM Cortex-M0+ |
| Vendor | ST Microelectronics |
| RAM | 12KiB |
| Flash | 32KiB |
| Frequency | up to 48MHz |
| FPU | no |
| Timers | 12 (2x watchdog, 1 SysTick, 5x 16-bit) |
| ADCs | 1x 12-bit (up to 19 channels) |
| UARTs | 2 |
| SPIs | 1 |
| I2Cs | 1 |
| RTC | 1 |
| Vcc | 2.0V - 3.6V |
| Datasheet | [Datasheet](https://www.st.com/resource/en/datasheet/stm32c031c6.pdf) |
| Reference Manual | [Reference Manual](https://www.st.com/resource/en/reference_manual/rm0490-stm32c0x1-advanced-armbased-32bit-mcus-stmicroelectronics.pdf) |
| Programming Manual | [Programming Manual](https://www.st.com/resource/en/programming_manual/pm0223-stm32-cortexm0-mcus-programming-manual-stmicroelectronics.pdf) |
| Board Manual | [Board Manual](https://www.st.com/resource/en/user_manual/um2953-stm32-nucleo64-board-mb1717-stmicroelectronics.pdf) |

## Flashing the Board Using ST-LINK Removable Media

On-board ST-LINK programmer provides via composite USB device removable media.
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24 changes: 9 additions & 15 deletions boards/nucleo-c031c6/include/periph_conf.h
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Expand Up @@ -88,9 +88,9 @@ static const uart_conf_t uart_config[] = {
* @name ADC configuration
*
* Note that we do not configure all ADC channels,
* and not in the STM32G071 order. Instead, we
* and not in the STM32C031 order. Instead, we
* just define 6 ADC channels, for the Nucleo
* Arduino header pins A0-A5 and the internal VBAT channel.
* Arduino header pins A0-A5.
*
* To find appropriate device and channel find in the
* board manual, table showing pin assignments and
Expand All @@ -100,29 +100,23 @@ static const uart_conf_t uart_config[] = {
* [X] - describes used channel - indexed from 1,
* for example ARD_A5_IN16 is channel 16
*
* For Nucleo-G071RB this information is in board manual,
* Table 12, page 30.
* For Nucleo-C031C6 this information is in board manual,
* Table 11, page 20.
*
* VBAT is connected to an internal input and 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.
* STM32C031C6 do not have internal channel for VBAT, more details provided
* in the MCU datasheet - section 3.14, page 20.
*
* For Nucleo-G071RB more information is provided in MCU datasheet,
* in section 3.14.3 - Vbat battery voltage monitoring, page 26.

* @{
*/
static const adc_conf_t adc_config[] = {
{ .pin = GPIO_PIN(PORT_A, 0), .dev = 0, .chan = 0 }, /* ARD_A0_IN0 */
{ .pin = GPIO_PIN(PORT_A, 1), .dev = 0, .chan = 1 }, /* ARD_A1_IN1 */
{ .pin = GPIO_PIN(PORT_A, 4), .dev = 0, .chan = 4 }, /* ARD_A2_IN4 */
{ .pin = GPIO_PIN(PORT_B, 1), .dev = 0, .chan = 9 }, /* ARD_A3_IN9 */
{ .pin = GPIO_PIN(PORT_B, 11), .dev = 0, .chan = 15 }, /* ARD_A4_IN15 */
{ .pin = GPIO_PIN(PORT_B, 12), .dev = 0, .chan = 16 }, /* ARD_A5_IN16 */
{ .pin = GPIO_UNDEF, .dev = 0, .chan = 14}, /* VBAT */
{ .pin = GPIO_PIN(PORT_B, 1), .dev = 0, .chan = 18 }, /* ARD_A3_IN18 */
{ .pin = GPIO_PIN(PORT_A, 11), .dev = 0, .chan = 11 }, /* ARD_A4_IN11 */
{ .pin = GPIO_PIN(PORT_A, 12), .dev = 0, .chan = 12 }, /* ARD_A5_IN12 */
};

#define VBAT_ADC ADC_LINE(6) /**< VBAT ADC line */
#define ADC_NUMOF ARRAY_SIZE(adc_config)
/** @} */

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