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| author | Uwe Hermann <uwe@hermann-uwe.de> | 2011-11-24 20:29:44 +0100 |
|---|---|---|
| committer | Uwe Hermann <uwe@hermann-uwe.de> | 2011-11-24 20:29:44 +0100 |
| commit | 709737bde931156a23f8c5b8bfdd8af2c1e165a9 (patch) | |
| tree | 45a5fd01882810fe14155f9744c41e0d3f106e72 /i2c/rtc_epson_8564je | |
| parent | f9eb559c8e87546fee0b672f2f7a5efb9125e17e (diff) | |
| download | sigrok-dumps-709737bde931156a23f8c5b8bfdd8af2c1e165a9.tar.gz sigrok-dumps-709737bde931156a23f8c5b8bfdd8af2c1e165a9.zip | |
rtc_epson_8564je: Fix up and document example.
The sample data was not correct, only reads were contained, but no writes.
Also, document how the decoded I2C data should look like.
Diffstat (limited to 'i2c/rtc_epson_8564je')
| -rw-r--r-- | i2c/rtc_epson_8564je/README | 19 | ||||
| -rw-r--r-- | i2c/rtc_epson_8564je/rtc_epson_8564je.sr | bin | 63546 -> 96839 bytes |
2 files changed, 16 insertions, 3 deletions
diff --git a/i2c/rtc_epson_8564je/README b/i2c/rtc_epson_8564je/README index e87f4de..bebec46 100644 --- a/i2c/rtc_epson_8564je/README +++ b/i2c/rtc_epson_8564je/README @@ -2,7 +2,8 @@ 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). Logic analyzer setup @@ -14,7 +15,7 @@ of 1MHz. The logic analyzer probes were connected to the RTC chip like this: Probe RTC chip pin ------------------------ 0 (green) SCL - 6 (blue) SDA + 1 (orange) SDA GND GND @@ -27,8 +28,20 @@ The device talking to the RTC was doing the following in an infinite loop: - 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 \ - -p '1=SCL,7=SDA,2-6,8' -o rtc_epson_8564je.sr + -p '1=SCL,2=SDA' -o rtc_epson_8564je.sr diff --git a/i2c/rtc_epson_8564je/rtc_epson_8564je.sr b/i2c/rtc_epson_8564je/rtc_epson_8564je.sr Binary files differindex 76f088f..c84bb78 100644 --- a/i2c/rtc_epson_8564je/rtc_epson_8564je.sr +++ b/i2c/rtc_epson_8564je/rtc_epson_8564je.sr |