The sample data was not correct, only reads were contained, but no writes.
Also, document how the decoded I2C data should look like.
Epson 8564JE I2C RTC
-------------------------------------------------------------------------------
Epson 8564JE I2C RTC
-------------------------------------------------------------------------------
-This an example capture of I2C traffic from/to an Epson 8564JE I2C RTC chip.
+This an example capture of I2C traffic from/to an Epson 8564JE I2C RTC chip,
+which has a slave address of 0x51 (or 0xa2, if the read/write bit is included).
Probe RTC chip pin
------------------------
0 (green) SCL
Probe RTC chip pin
------------------------
0 (green) SCL
- Read back the current time from the RTC.
- Read back the current time from the RTC.
+This is what the decoded data should look like:
+
+ - Setting the date/time:
+ S Wr:0xa2 A 0x02 A 0x54 A 0x03 A 0x04 A 0x22 A 0x02 A 0x11 A 0x11 A P
+
+ - Reading the current date/time:
+ S Wr:0xa2 A 0x02 A Sr Rd:0xa3 A 0x54 A 0x03 A 0x44 A 0x62 A 0x52 A
+ 0x51 A 0x11 N P
+
+ - The abbrevations used above: S = Start, Wr = Write, A = ACK, P = Stop,
+ Sr = Repeated start, Rd = Read, N = NACK
+
The sigrok command line used was:
sigrok-cli -d 0:samplerate=1mhz --samples 8388608 \
The sigrok command line used was:
sigrok-cli -d 0:samplerate=1mhz --samples 8388608 \
- -p '1=SCL,7=SDA,2-6,8' -o rtc_epson_8564je.sr
+ -p '1=SCL,2=SDA' -o rtc_epson_8564je.sr