AVRSoftwareSPIOutput< DATA_PIN, CLOCK_PIN, SPI_SPEED > Class Template Reference

Detailed Description

template<uint8_t DATA_PIN, uint8_t CLOCK_PIN, uint32_t SPI_SPEED>
class AVRSoftwareSPIOutput< DATA_PIN, CLOCK_PIN, SPI_SPEED >

Software SPI (aka bit-banging) support Includes aggressive optimizations for when the clock and data pin are on the same port.

Template Parameters

DATA_PIN	pin number of the SPI data pin.
CLOCK_PIN	pin number of the SPI clock pin.
SPI_SPEED	speed of the bus. Determines the delay times between pin writes.

Note

Although this is named with the "AVR" prefix, this will work on any platform. Theoretically.

Todo

Replace the select pin definition with a set of pins, to allow using mux hardware for routing in the future.

Definition at line 24 of file fastspi_bitbang.h.

#include <fastspi_bitbang.h>

Inheritance diagram for AVRSoftwareSPIOutput< DATA_PIN, CLOCK_PIN, SPI_SPEED >:

Collaboration diagram for AVRSoftwareSPIOutput< DATA_PIN, CLOCK_PIN, SPI_SPEED >:

Public Member Functions
	AVRSoftwareSPIOutput ()
	Default constructor.
	AVRSoftwareSPIOutput (Selectable *pSelect)
	Constructor with selectable for SPI chip select.
void	init ()
	Set the clock/data pins to output and make sure the chip select is released.
void	release ()
	Release the SPI chip select line.
void	select ()
	Select the SPI output (chip select)
void	setSelect (Selectable *pSelect)
	Set the pointer for the SPI chip select.
template<class D>
void	writeBytes (FASTLED_REGISTER uint8_t *data, int len)
	Write an array of data to the SPI interface.
void	writeBytes (FASTLED_REGISTER uint8_t *data, int len)
	Write an array of data to the SPI interface.
void	writeBytesValue (uint8_t value, int len)
	Write multiple bytes of the given value over SPI.
template<uint8_t FLAGS, class D, EOrder RGB_ORDER>
void	writePixels (PixelController< RGB_ORDER > pixels, void *context=NULL)
	Write LED pixel data to the SPI interface.

Static Public Member Functions
static void	stop ()
	Stop the SPI output.
static void	wait ()
	Wait until the SPI subsystem is ready for more data to write.
static void	waitFully ()
	Wait until the SPI subsystem is ready for more data to write.
template<uint8_t BIT>
static void	writeBit (uint8_t b)
	Write the BIT'th bit out via SPI, setting the data pin then strobing the clock.
static void	writeByte (uint8_t b)
	Write a single byte over SPI.
static void	writeByteNoWait (uint8_t b)
	Write a single byte over SPI without waiting.
static void	writeBytePostWait (uint8_t b)
	Write a single byte over SPI and wait afterwards.
static void	writeBytesValueRaw (uint8_t value, int len)
	Write multiple bytes of the given value over SPI, without selecting the interface.
static void	writeWord (uint16_t w)
	Write a word (two bytes) over SPI.

Private Types
typedef FastPin< CLOCK_PIN >::port_ptr_t	clock_ptr_t
typedef FastPin< CLOCK_PIN >::port_t	clock_t
typedef FastPin< DATA_PIN >::port_ptr_t	data_ptr_t
typedef FastPin< DATA_PIN >::port_t	data_t

Static Private Member Functions
template<uint8_t BIT>
static FASTLED_FORCE_INLINE void	writeBit (uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin)
	Write the BIT'th bit out via SPI, setting the data pin then strobing the clock, using the passed in pin registers to accelerate access if needed.
template<uint8_t BIT>
static FASTLED_FORCE_INLINE void	writeBit (uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin, data_t hival, data_t loval, clock_t hiclock, clock_t loclock)
	The version of writeBit() to use when clock and data are on separate pins with precomputed values for setting the clock and data pins.
template<uint8_t BIT>
static FASTLED_FORCE_INLINE void	writeBit (uint8_t b, data_ptr_t clockdatapin, data_t datahiclockhi, data_t dataloclockhi, data_t datahiclocklo, data_t dataloclocklo)
	The version of writeBit() to use when clock and data are on the same port with precomputed values for the various combinations.
static void	writeByte (uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin)
	writeByte() implementation with data/clock registers passed in.
static void	writeByte (uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin, data_t hival, data_t loval, clock_t hiclock, clock_t loclock)
	writeByte() implementation with not just registers passed in, but pre-baked values for said registers for data hi/lo and clock hi/lo values.
static void	writeByte (uint8_t b, data_ptr_t datapin, data_t hival, data_t loval, clock_t hiclock, clock_t loclock)
	writeByte() implementation with the data register passed in and prebaked values for data hi w/clock hi and low and data lo w/clock hi and lo.

Private Attributes
Selectable *	m_pSelect
	SPI chip select.

---

The documentation for this class was generated from the following file:

• fastspi_bitbang.h