logic_analyzer::LogicAnalyzer Class Reference

Main Logic Analyzer API using the SUMP Protocol. When you try to connect to the Logic Analzyer - SUMP calls the following requests 1) RESET, 2) ID and then 3) GET_METADATA: This is used to populate the Device! All other requests are called when you click on the capture button. More...

#include <logic_analyzer.h>

Public Member Functions
	LogicAnalyzer ()
	Default Constructor.
	~LogicAnalyzer ()
	Destructor.
void	begin (Stream &procesingStream, AbstractCapture *capture, uint32_t maxCaptureSize, uint8_t pinStart=0, uint8_t numberOfPins=8, bool setup_pins=false)
	Starts the processing.
uint16_t	startPin ()
	Provides the GPIO number of the start pin which is used for capturing.
uint16_t	numberOfPins ()
	Provides the number of subsequent GPIO pins which will be used for capturing.
Stream &	stream ()
	provides command output stream of capturing divice
Status	status ()
	provides the actual Status
void	setStatus (Status status)
	Defines the actual status.
RingBuffer &	buffer ()
	Provides access to the buffer.
void	processCommand ()
	process the next available command - Call this function from your Arduino loop()!
PinBitArray	triggerValues ()
	provides the trigger values
void	setTriggerValues (PinBitArray values)
	defines the trigger values
PinBitArray	triggerMask ()
	provides the trigger mask
void	setTriggerMask (PinBitArray values)
	defines the trigger mask
int	readCount ()
	provides the read count
void	setReadCount (int count)
	defines the read count
int	delayCount ()
	provides the delay count
void	setDelayCount (int count)
	defines the delay count
uint64_t	captureFrequency ()
	provides the caputring frequency
uint64_t	delayTimeUs ()
	Provides the delay time between measurements in microseconds.
void	setCaptureFrequency (uint64_t value)
	defines the caputring frequency
bool	isContinuousCapture ()
	checks if the caputring is continuous
void	setContinuousCapture (bool cont)
	defines the caputring as continuous
void	setEventHandler (EventHandler eh)
	defines a event handler that gets notified on some defined events
void	clear ()
	Resets the status and buffer.
size_t	size ()
	returns the max buffer size
size_t	available ()
	returns the avialable buffer entries
void	setLogger (Stream &logger)
	Activate the logging by defining the logging output Stream.
void	setCaptureOnArm (bool capture)
	Switch automatic capturing on ARMED status on/off.
void	setDescription (const char *name)
	Defines the Description.
void	setAllocateBuffer (bool do_allocate)
	Allows to switch of the automatic buffer allocation - call before begin!
void	capture ()
	starts the capturing

Protected Member Functions
LogicAnalyzerState &	state ()
	Provides a reference to the LogicAnalyzerState.
bool	hasCommand ()
	checks if there is a command available
uint8_t	command ()
	gets the next 1 byte command
Sump4ByteComandArg &	commandExt ()
	gets the next 4 byte command
void	write (uint8_t cmd, uint32_t number)
	writes a byte command with uint32_t number argument
void	write (uint8_t cmd, const char *str)
	writes a byte command with char* argument
PinBitArray	commandExtPinBitArray ()
	Provides the command as PinBitArray.
void	raiseEvent (Event event)
	raises an event
void	setupDelay (uint32_t divider)
void	sendMetadata ()
void	processCommand (int cmd)

Protected Attributes
bool	is_capture_on_arm = true
bool	do_allocate_buffer = true
uint64_t	sump_reset_igorne_timeout =0
AbstractCapture *	capture_ptr = nullptr
const char *	description = "ARDUINO"
const char *	device_id = "1ALS"
const char *	firmware_version = "01.0"
const char *	protocol_version = "\x041\x002"

Detailed Description

Main Logic Analyzer API using the SUMP Protocol. When you try to connect to the Logic Analzyer - SUMP calls the following requests 1) RESET, 2) ID and then 3) GET_METADATA: This is used to populate the Device! All other requests are called when you click on the capture button.

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

begin()

void logic_analyzer::LogicAnalyzer::begin ( Stream &  procesingStream, AbstractCapture *  capture, uint32_t  maxCaptureSize, uint8_t  pinStart = 0, uint8_t  numberOfPins = 8, bool  setup_pins = false  )

inline

Starts the processing.

Parameters

procesingStream	Stream which is used to communicate to PulseView
capture	AbstractCapture
maxCaptureSize	Maximum number of captured entries
pinStart	Start GPIO Pin Number for capturing
numberOfPins	Number of subsequent pins to capture
setup_pins	Change the pin mode to input

processCommand()

void logic_analyzer::LogicAnalyzer::processCommand ( int  cmd )

inlineprotected

Proposess the SUMP commands

Resets the buffer and processing status. Resets are repeated 5 times!

Asks for device identification. The device will respond with four bytes.

sendMetadata()

void logic_analyzer::LogicAnalyzer::sendMetadata ( )

inlineprotected

This function returns the metadata about our capabilities. It is sent in response to the OpenBench Logic Sniffer extended get metadata command

setupDelay()

void logic_analyzer::LogicAnalyzer::setupDelay ( uint32_t  divider )

inlineprotected

This function calculates what delay we need for the specific sample rate. The dividers are based on SUMP's 100Mhz clock. For example, a 1MHz sample rate has a divider of 99 (0x63 in the command byte). rate = clock / (divider + 1) rate = 100,000,000 / (99 + 1) result is 1,000,000 saying we want a 1MHz sample rate. We calculate our inter sample delay from the divider and the delay between samples gives us the sample rate per second. So for 1MHz, delay = (99 + 1) / 100 which gives us a 1 microsecond delay. For 500KHz, delay = (199 + 1) / 100 which gives us a 2 microsecond delay.

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

• src/logic_analyzer.h