File SR_4021.cpp¶

FileList > examples > SR_4021 > SR_4021.cpp

#include "daisy_seed.h"

Public Types¶

Type	Name
typedef daisy::ShiftRegister4021< 1, 1 >	ButtonSr

Public Attributes¶

Type	Name
uint8_t	btn_data
uint32_t	btn_rising_edge_time
ButtonSr	btn_shiftreg
daisy::GPIO	callback_pin
daisy::DaisySeed	hw

Public Static Attributes¶

Type	Name
constexpr daisy::Pin	kCallbackPin = `daisy::seed::D23`
constexpr daisy::Pin	kPinSrClk = `daisy::seed::D7`
constexpr daisy::Pin	kPinSrData = `daisy::seed::D19`
constexpr daisy::Pin	kPinSrLatch = `daisy::seed::D21`
constexpr uint32_t	kUsbPrintPeriod = `250`

Public Functions¶

Type	Name
void	AudioCallback (daisy::AudioHandle::InputBuffer in, daisy::AudioHandle::OutputBuffer out, size_t size)
int	main (void)

Public Types Documentation¶

typedef ButtonSr¶

using ButtonSr =  daisy::ShiftRegister4021<1, 1>;

SR 4021 Example This demonstrates the use of an CD4021 input shift register to read 8 buttons. Some auxillary code is included to debounce, and time the length presses.

The AudioCallback is utilized to read the buttons at 1kHz. Values are output via the USB Micro port.

Public Attributes Documentation¶

variable btn_data¶

uint8_t btn_data[8];

variable btn_rising_edge_time¶

uint32_t btn_rising_edge_time[8];

variable btn_shiftreg¶

ButtonSr btn_shiftreg;

variable callback_pin¶

daisy::GPIO callback_pin;

variable hw¶

daisy::DaisySeed hw;

Public Static Attributes Documentation¶

variable kCallbackPin¶

constexpr daisy::Pin kCallbackPin;

variable kPinSrClk¶

constexpr daisy::Pin kPinSrClk;

variable kPinSrData¶

constexpr daisy::Pin kPinSrData;

variable kPinSrLatch¶

constexpr daisy::Pin kPinSrLatch;

variable kUsbPrintPeriod¶

constexpr uint32_t kUsbPrintPeriod;

Public Functions Documentation¶

function AudioCallback¶

void AudioCallback (
    daisy::AudioHandle::InputBuffer in,
    daisy::AudioHandle::OutputBuffer out,
    size_t size
)

function main¶

int main (
    void
)

The documentation for this class was generated from the following file external-docs/libDaisy/examples/SR_4021/SR_4021.cpp