projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 5afac049 LG |
1 | ------------------------------------------------------------------------------- |
| 2 | ROHM BH1750FVI Digital Ambient Light Sensor | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is a capture of data output from a ROHM BH1750FVI digital ambient | |
| 6 | light sensor. | |
| 7 | ||
| 8 | Details: | |
| 9 | https://www.mouser.com/ds/2/348/bh1750fvi-e-186247.pdf | |
| 10 | ||
| 11 | ||
| 12 | Logic analyzer setup | |
| 13 | -------------------- | |
| 14 | ||
| 15 | The logic analyzer used is a Saleae Logic clone (at 500kHz): | |
| 16 | ||
| 17 | Probe BH1750FVI pin | |
| 18 | ---------------------------- | |
| 19 | D0 (CH1) SCL | |
| 20 | D1 (CH2) SDA | |
| 21 | ||
| 22 | ||
| 23 | bh1750_hresolutionmode.sr | |
| 24 | ------------------------- | |
| 25 | ||
| 26 | The sigrok 0.7.1 command line used: | |
| 27 | ||
| 28 | sigrok-cli --driver fx2lafw --channels D0=SCL,D1=SDA \ | |
| 29 | --config samplerate=500khz:captureratio=1 --samples 100000 \ | |
| 30 | --triggers SCL=1,SDA=f --output-file <filename> | |
| 31 | ||
| 32 | The file provides recommended setup of the sensor in One Time H-Resolution Mode | |
| 33 | with default value 69 (0x45) of the measurement time bits in measurement time | |
| 34 | registers (sensor sensitivity adjusting) with standard resolution 0.83 lux per | |
| 35 | count. | |
| 36 | The sensor has ADDR pin grounded (ADDR = 'L'), which results to the slave | |
| 37 | address 35 (0x23). | |
| 38 | The long time period between communication bursts represents sensor's | |
| 39 | conversion period for configured resolution. | |
| 40 | ||
| 41 | ||
| 42 | bh1750_h2resolutionmode.sr | |
| 43 | -------------------------- | |
| 44 | ||
| 45 | The sigrok 0.7.1 command line used: | |
| 46 | ||
| 47 | sigrok-cli --driver fx2lafw --channels D0=SCL,D1=SDA \ | |
| 48 | --config samplerate=500khz:captureratio=1 --samples 500000 \ | |
| 49 | --triggers SCL=1,SDA=f --output-file <filename> | |
| 50 | ||
| 51 | The file provides setup of the sensor in One Time H-Resolution Mode2 with | |
| 52 | value 254 (0xFE) of the measurement time bits in measurement time | |
| 53 | registers (sensor sensitivity adjusting) with the lowest resolution 0.11 lux | |
| 54 | per count (the highest sensitivity). | |
| 55 | The sensor has ADDR pin grounded (ADDR = 'L'), which results to the slave | |
| 56 | address 35 (0x23). | |
| 57 | The long time period between communication bursts represents sensor's | |
| 58 | conversion period for configured resolution. |