diff options
Diffstat (limited to 'i2c/rtc_dallas_ds1307/README')
| -rw-r--r-- | i2c/rtc_dallas_ds1307/README | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/i2c/rtc_dallas_ds1307/README b/i2c/rtc_dallas_ds1307/README index 43971d0..20edc7e 100644 --- a/i2c/rtc_dallas_ds1307/README +++ b/i2c/rtc_dallas_ds1307/README @@ -10,8 +10,8 @@ Details: - DS1307 datasheet: http://sparkfun.com/datasheets/Components/DS1307.pdf -Logic analyzer setup --------------------- +A. Logic analyzer setup +----------------------- The logic analyzer used was Open Bench Logic Sniffer (at 200kHz): @@ -21,8 +21,8 @@ The logic analyzer used was Open Bench Logic Sniffer (at 200kHz): 1 SDA -Data ----- +rtc_ds1307_200khz_*.sr +---------------------- This is what the decoded data should look like: @@ -42,3 +42,32 @@ The sigrok command line used was: sigrok-cli --driver=ols:conn=/dev/ttyACM0 -d samplerate=200khz \ --samples=24576 -p 0=SCL,1=SDA --triggers SDA=0 -o <filename> + +B. Logic analyzer setup +----------------------- + +The logic analyzer used is a Saleae Logic clone (at 500kHz): + + Probe DS1307 pin + ------------------------- + D0 (CH1) SCL + D1 (CH2) SDA + +The sigrok 0.7.1 command line used: + +sigrok-cli --driver fx2lafw --channels D0=CLK,D1=DATA \ + --config samplerate=500khz:captureratio=1 --samples 1000 \ + --triggers CLK=1,DATA=f --output-file <filename> + + +rtc_ds1307_500khz_sqw32khz_mode12h_pm.sr +---------------------------------------- + +The file provides reading of time keeping registers as well as control register +of the RTC chip, which was setup to 12-hours mode, time with PM flag, and +square wave frequency 32768 Hz before in order to demonstrate bugfixes +in the following GitHub pull request for libsigrokdecode +(merged as b3f6033022006c8f4ee88a70155f3571bee1a2ca): + + https://github.com/sigrokproject/libsigrokdecode/pull/10 + |