Driver for the analog-to-digital peripheral of the STM32. More...

Enumerations
enum	AdcChannel { ADC_CHANNEL_9 = 9, ADC_CHANNEL_6 = 6, ADC_CHANNEL_7 = 7, ADC_CHANNEL_14 = 14, ADC_CHANNEL_15 = 15 }
	Enum that corresponds to the two ADC input channels of the board. More...

Functions
void	adc_Init (void)
	Initialize the ADC converter (2 analog inputs + current sense). More...

void	adc_CalibrateCurrentSens (void)
	Compute the current sense offset. More...

float32_t	adc_GetCurrent (void)
	Compute the current sense offset. More...

float32_t	adc_GetChannelVoltage (AdcChannel channel)
	Gets the voltage measured by the selected ADC channel. More...

Detailed Description

Driver for the analog-to-digital peripheral of the STM32.

An analog-to-digital converter (ADC) is used to measure the voltage of one or several microcontroller analog pins.

In addition, there is an additional channel to measure the current going through the motor (useful for current regulation).

Call adc_Init() first, in the initialization code. Then, call adc_GetChannelVoltage() every time you need the voltage.

To measure accurately the motor current, a calibration has to be performed first. Call dc_CalibrateCurrentSens() in the main(), when the current regulation is disabled (see H-bridge documentation). Then, call adc_GetCurrent() every time it is needed. This function returns the last value transfered by the DMA, so there is no conversion delay when calling this function.

Enumeration Type Documentation

◆ AdcChannel

enum AdcChannel

Enum that corresponds to the two ADC input channels of the board.

Enumerator
ADC_CHANNEL_9	Pin HALL_INPUT (5) of the connector J9 (Hall position sensor).
ADC_CHANNEL_6	Pin AN_IN1 (29 & 30) of the connector J12 (analog extension).
ADC_CHANNEL_7	Pin AN_IN2 (33 & 34) of the connector J12 (analog extension).
ADC_CHANNEL_14	Pin AN_IN3 (37 & 38) of the connector J12 (analog extension).
ADC_CHANNEL_15	Pin AN_IN4 (41 & 42) of the connector J12 (analog extension).

Function Documentation

◆ adc_CalibrateCurrentSens()

void adc_CalibrateCurrentSens ( void )

Compute the current sense offset.

Note: Run before enabling current regulation.

◆ adc_GetChannelVoltage()

float32_t adc_GetChannelVoltage ( AdcChannel channel )

Gets the voltage measured by the selected ADC channel.

Parameters

channel the channel of the ADC.

Returns: the measured voltage [V].

◆ adc_GetCurrent()

float32_t adc_GetCurrent ( void )

Compute the current sense offset.

Return values

The	measured current in [mA].

◆ adc_Init()

void adc_Init ( void )

Initialize the ADC converter (2 analog inputs + current sense).

Enumerations

Functions