[sigrok-dumps.git] / i2c / a2_dummy_write / README

-------------------------------------------------------------------------------
Dummy I2C writes
-------------------------------------------------------------------------------

This is an example capture of some dummy I2C traffic, where the master writes
to a slave (an RTC) at address 0x51 (or 0x2a, if the read/write bit is
included) in an infinite loop. The slave does not respond.


Logic analyzer setup
--------------------

The logic analyzer used was a ChronoVu LA8 (at 1MHz):

  Probe       RTC chip pin
  ------------------------
  0 (green)   SCL
  1 (orange)  SDA


Data
----

This is what the decoded data should look like:

 - S Wr:0xa2 A 0x55 A 0x66 A P

 - The abbreviations used above: S = Start, Wr = Write, A = ACK, P = Stop

The sigrok command line used was:

  sigrok-cli -d 0:samplerate=1mhz --samples 8388608 \
             -p '1=SCL,2=SDA' -o a2_dummy_write.sr
Commit	Line	Data
2c954388 UH	1	-------------------------------------------------------------------------------
	2	Dummy I2C writes
	3	-------------------------------------------------------------------------------
5f09f8b6	4
ad011ff3	5	This is an example capture of some dummy I2C traffic, where the master writes
47cd3c8f UH	6	to a slave (an RTC) at address 0x51 (or 0x2a, if the read/write bit is
47cd3c8f UH	7	included) in an infinite loop. The slave does not respond.
2c954388 UH	8
	9
	10	Logic analyzer setup
	11	--------------------
	12
47cd3c8f	13	The logic analyzer used was a ChronoVu LA8 (at 1MHz):
2c954388 UH	14
	15	Probe RTC chip pin
	16	------------------------
	17	0 (green) SCL
	18	1 (orange) SDA
2c954388 UH	19
	20
	21	Data
	22	----
	23
	24	This is what the decoded data should look like:
	25
	26	- S Wr:0xa2 A 0x55 A 0x66 A P
	27
	28	- The abbreviations used above: S = Start, Wr = Write, A = ACK, P = Stop
	29
	30	The sigrok command line used was:
	31
	32	sigrok-cli -d 0:samplerate=1mhz --samples 8388608 \
	33	-p '1=SCL,2=SDA' -o a2_dummy_write.sr
095af1a5	34