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modm::platform::Adc2 Class Reference
Platform HAL » Analog-to-Digital Converter (ADC) | Platform HAL » Analog-to-Digital Converter (ADC) » Instance 2

#include <modm/platform/adc/adc_2.hpp>

Inheritance diagram for modm::platform::Adc2:
modm::Adc modm::PeripheralDriver modm::platform::AdcInterrupt2

Public Types

enum  Channel : uint8_t {
  Channel0 = 0, Channel1 = 1, Channel2 = 2, Channel3 = 3,
  Channel4 = 4, Channel5 = 5, Channel6 = 6, Channel7 = 7,
  Channel8 = 8, Channel9 = 9, Channel10 = 10, Channel11 = 11,
  Channel12 = 12, Channel13 = 13, Channel14 = 14, Channel15 = 15
}
 
enum  SampleTime : uint8_t {
  SampleTime::Cycles2 = 0b000, SampleTime::Cycles8 = 0b001, SampleTime::Cycles14 = 0b010, SampleTime::Cycles29 = 0b011,
  SampleTime::Cycles42 = 0b100, SampleTime::Cycles56 = 0b101, SampleTime::Cycles72 = 0b110, SampleTime::Cycles240 = 0b111
}
 
enum  RegularConversionExternalTrigger {
  Event0 = 0x0u, Event1 = 0x1u, Event2 = 0x2u, Event3 = 0x3u,
  Event4 = 0x4u, Event5 = 0x5u, Event6 = 0x6u, Event7 = 0x7u
}
 
enum  Interrupt : uint32_t { Interrupt::AnalogWatchdog = ADC_CR1_AWDIE, Interrupt::EndOfRegularConversion = ADC_CR1_EOCIE, Interrupt::EndOfInjectedConversion = ADC_CR1_JEOCIE }
 
enum  InterruptFlag : uint32_t { InterruptFlag::AnalogWatchdog = ADC_SR_AWD, InterruptFlag::EndOfRegularConversion = ADC_SR_EOC, InterruptFlag::EndOfInjectedConversion = ADC_SR_JEOC, InterruptFlag::All = ADC_SR_AWD | ADC_SR_EOC | ADC_SR_JEOC }
 

Public Member Functions

 MODM_FLAGS32 (Interrupt)
 
 MODM_FLAGS32 (InterruptFlag)
 

Static Public Member Functions

template<class... Signals>
static void connect ()
 
template<class SystemClock , frequency_t frequency = MHz(10), percent_t tolerance = pct(10)>
static void initialize ()
 
static void enable ()
 
static void disable ()
 
static void startConversion ()
 
static bool isConversionFinished ()
 
static uint16_t getValue ()
 
static uint16_t readChannel (Channel channel)
 
static bool setChannel (const Channel channel, const SampleTime sampleTime=static_cast< SampleTime >(0b000))
 
template<class Gpio >
static bool setPinChannel (SampleTime sampleTime=static_cast< SampleTime >(0b000))
 Setting the channel for a Pin.
 
template<class Gpio >
static constexpr Channel getPinChannel ()
 Get the channel for a Pin.
 
static Channel getChannel ()
 
static void enableFreeRunningMode ()
 
static void disableFreeRunningMode ()
 
static void setLeftAdjustResult ()
 
static void setRightAdjustResult ()
 
static void calibrate ()
 
static bool addChannel (const Channel channel, const SampleTime sampleTime=static_cast< SampleTime >(0b000))
 Add a channel to conversion group.
 
static void setSampleTime (const Channel channel, const SampleTime sampleTime=static_cast< SampleTime >(0b000))
 change sample time of ADC channel
 
static void enableInterruptVector (const uint32_t priority, const bool enable=true)
 
static void enableInterrupt (const Interrupt_t interrupt)
 
static void disableInterrupt (const Interrupt_t interrupt)
 
static InterruptFlag_t getInterruptFlags ()
 
static void acknowledgeInterruptFlags (const InterruptFlag_t flags)
 
static uintptr_t getDataRegisterAddress ()
 
static void enableRegularConversionExternalTrigger (RegularConversionExternalTrigger regularConversionExternalTrigger)
 
static void enableDmaMode ()
 
static void disableDmaMode ()
 
static bool getAdcEnabled ()
 
static void enableScanMode ()
 
static void disableScanMode ()
 
static void acknowledgeInterruptFlag ()
 
template<uint64_t available, uint64_t requested, percent_t tolerance>
static void assertBaudrateInTolerance ()
 
template<double available, double requested, percent_t tolerance>
static void assertDurationInTolerance ()
 
static void configurePurpose ()
 configures a peripheral for a specific purpose
 
static bool getInterruptFlag ()
 Read an interrupt flag.
 
static void getParameter ()
 returns a parameter
 
static bool setChannel (Channel channel)
 
static void setParameter ()
 sets a parameter
 

Static Public Attributes

static constexpr uint8_t Resolution = 12
 

Detailed Description

Analog/Digital-Converter module (ADC2).

The 12-bit ADC is a successive approximation analog-to-digital converter. It has up to 18 multiplexed channels allowing it to measure signals from 16 external and two internal sources. The result of the ADC is stored in a left-aligned or right-aligned 16-bit data register.

Author
Stephan Kugelmann
David Hebbeker
ekiwi

Member Enumeration Documentation

enum modm::platform::Adc2::Channel : uint8_t
strong

Channels, which can be used with this ADC.

You can specify the channel by using a pin-name, like PIN_C0, an internal sensor, like TEMPERATURE_SENSOR or just the plain channel number, like CHANNEL_0.

enum modm::platform::Adc2::Interrupt : uint32_t
strong

Possible interrupts.

An interrupt can be produced on the end of conversion for regular and injected groups, when the analog watchdog status bit is set and when the overrun status bit is set.

Enum ValuesDocumentation
AnalogWatchdog 

Analog watchdog status bit is set.

EndOfRegularConversion 

End of conversion of a regular group.

EndOfInjectedConversion 

End of conversion of an injected group.

enum modm::platform::Adc2::InterruptFlag : uint32_t
strong
Enum ValuesDocumentation
AnalogWatchdog 

Analog watchdog status bit is set.

EndOfRegularConversion 

End of conversion of a regular group.

EndOfInjectedConversion 

End of conversion of an injected group.

All 

All InterruptFlags.

enum modm::platform::Adc2::RegularConversionExternalTrigger
strong

Enum mapping all events on a external trigger converter. The source mapped to each event varies on controller family, refer to the ADC external trigger section on reference manual of your controller for more information

enum modm::platform::Adc2::SampleTime : uint8_t
strong

Sampling time of the input voltage.

Total conversion time is T_con = Sampling time + 12 cycles

Enum ValuesDocumentation
Cycles2 

1.5 ADCCLK cycles

Cycles8 

7.5 ADCCLK cycles

Cycles14 

13.5 ADCCLK cycles

Cycles29 

28.5 ADCCLK cycles

Cycles42 

41.5 ADCCLK cycles

Cycles56 

55.5 ADCCLK cycles

Cycles72 

71.5 ADCCLK cycles

Cycles240 

239.5 ADCCLK cycles

Member Function Documentation

static void modm::PeripheralDriver::acknowledgeInterruptFlag ( )
inheritedstatic

Acknowledge an interrupt flag.

We use acknowledge here, since it describes the intention rather than the actual implementation.

static void modm::platform::Adc2::acknowledgeInterruptFlags ( const InterruptFlag_t  flags)
inlinestatic

Clears the specified interrupt flag.

Parameters
flagThe interrupt flag, which shall be cleared.
Precondition
The ADC clock must be started and the ADC switched on with initialize().
template<uint64_t available, uint64_t requested, percent_t tolerance>
static void modm::PeripheralDriver::assertBaudrateInTolerance ( )
inheritedinlinestatic

Since baudrates are usually generated by prescaling a system clock, only several distinct values can be generated. This method checks if the user requested baudrate is within error tolerance of the system achievable baudrate.

static void modm::platform::Adc2::calibrate ( )
inlinestatic

Run ADC self-calibration

Precondition
The ADC must be initialized to perform the calibration
static void modm::platform::Adc2::disableDmaMode ( )
inlinestatic

Disable Dma mode for the ADC

static void modm::platform::Adc2::disableInterrupt ( const Interrupt_t  interrupt)
inlinestatic

Disables the ADC Conversion Complete Interrupt.

static void modm::platform::Adc2::disableScanMode ( )
inlinestatic

Disables scan mode

static void modm::platform::Adc2::enableDmaMode ( )
inlinestatic

Enable Dma mode for the ADC

static void modm::platform::Adc2::enableInterrupt ( const Interrupt_t  interrupt)
inlinestatic

Enables the ADC Conversion Complete Interrupt.

You could catch the interrupt using this example function:

Precondition
The ADC clock must be started and the ADC switched on with initialize(). Also the Interrupt Vector needs to be enabled first.
Parameters
priorityPriority to set
interruptThe interrupt, which shall be enabled. See Interrupt for available interrupts.
Note
ADC1 and ADC2 interrupts are mapped onto the same interrupt vector. ADC3 interrupts are mapped onto a separate interrupt vector.
static void modm::platform::Adc2::enableScanMode ( )
inlinestatic

Enables scan mode

static bool modm::platform::Adc2::getAdcEnabled ( )
inlinestatic

get if adc is enabled

Returns
true if ADC_CR2_ADON bit is set, false otherwise
static InterruptFlag_t modm::platform::Adc2::getInterruptFlags ( )
inlinestatic

Returns if the th interrupt flags set.

Precondition
The ADC clock must be started and the ADC switched on with initialize()
template<class SystemClock , frequency_t frequency = MHz(10), percent_t tolerance = pct(10)>
static void modm::platform::Adc2::initialize ( )
static

Initialize and enable the A/D converter.

Enables the ADC clock and switches on the ADC. The ADC clock prescaler will be set as well.

The ADC clock must not exceed 14 MHz.

static bool modm::Adc::setChannel ( Channel  channel)
inheritedstatic

Analog channel selection.

Returns
true if the channel exists and was available, false otherwise
static bool modm::platform::Adc2::setChannel ( const Channel  channel,
const SampleTime  sampleTime = static_cast< SampleTime >(0b000) 
)
inlinestatic

Analog channel selection.

This not for scan mode. The number of channels will be set to 1, the channel selected and the corresponding pin will be set to analog input. If the the channel is modified during a conversion, the current conversion is reset and a new start pulse is sent to the ADC to convert the new chosen channnel / group of channels.

Parameters
channelThe channel which shall be read.
sampleTimeThe sample time to sample the input voltage.
Precondition
The ADC clock must be started and the ADC switched on with initialize()
static void modm::platform::Adc2::startConversion ( )
inlinestatic

Start a new conversion or continuous conversions.

Precondition
A ADC channel must be selected with setChannel(). When using a STM32F10x a delay of at least t_STAB after initialize() must be waited!
Postcondition
The result can be fetched with getValue()
Attention
When using a STM32F10x, the application should allow a delay of t_STAB between power up and start of conversion. Refer to Reference Manual (RM0008) ADC_CR2_ADON.
The documentation for this class was generated from the following file: