Difference between revisions of "PoLabs PoScope Basic2"
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Uwe Hermann (talk | contribs) m (→Sample rates) |
Uwe Hermann (talk | contribs) m (→Sample rates) |
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| 250 kHz | | 250 kHz | ||
| 0x06 | | 0x06 | ||
| | | 0xffa0 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 200 kHz | | 200 kHz | ||
| | | 0x06 | ||
| | | 0xff88 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 150 kHz | | 150 kHz | ||
| | | 0x06 | ||
| | | 0xff60 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 100 kHz | | 100 kHz | ||
| | | 0x06 | ||
| | | 0xff10 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 90 kHz | | 90 kHz | ||
| | | 0x06 | ||
| | | 0xfef6 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 80 kHz | | 80 kHz | ||
| | | 0x06 | ||
| | | 0xfed4 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 70 kHz | | 70 kHz | ||
| | | 0x06 | ||
| | | 0xfeaa | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 60 kHz | | 60 kHz | ||
| | | 0x06 | ||
| | | 0xfe70 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 50 kHz | | 50 kHz | ||
| | | 0x06 | ||
| | | 0xfe20 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 40 kHz | | 40 kHz | ||
| | | 0x06 | ||
| | | 0xfda8 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 30 kHz | | 30 kHz | ||
| | | 0x06 | ||
| | | 0xfce0 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 25 kHz | | 25 kHz | ||
| | | 0x06 | ||
| | | 0xfc40 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 20 kHz | | 20 kHz | ||
| | | 0x06 | ||
| | | 0xfb50 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 10 kHz | | 10 kHz | ||
| | | 0x06 | ||
| | | 0xf6a0 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 9 kHz | | 9 kHz | ||
| | | 0x06 | ||
| | | 0xf596 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 8 kHz | | 8 kHz | ||
| | | 0x06 | ||
| | | 0xf448 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 7 kHz | | 7 kHz | ||
| | | 0x06 | ||
| | | 0xf29c | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 6 kHz | | 6 kHz | ||
| | | 0x06 | ||
| | | 0xf060 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 5 kHz | | 5 kHz | ||
| | | 0x06 | ||
| | | 0xed40 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 4 kHz | | 4 kHz | ||
| | | 0x06 | ||
| | | 0xe890 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 3 kHz | | 3 kHz | ||
| | | 0x06 | ||
| | | 0xe0c0 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 2.5 kHz | | 2.5 kHz | ||
| | | 0x06 | ||
| | | 0xda80 | ||
|- bgcolor="#dddddd" | |- bgcolor="#dddddd" | ||
| 2 kHz | | 2 kHz | ||
| | | 0x06 | ||
| | | 0xd120 | ||
|- bgcolor="#eeeeee" | |- bgcolor="#eeeeee" | ||
| 1 kHz | | 1 kHz | ||
| | | 0x06 | ||
| | | 0xa240 | ||
|} | |} | ||
Revision as of 02:14, 6 January 2012
The PoLabs PoScope Basic2 is a 16-channel, 8MHz, USB-based logic analyzer (plus oscilloscope, signal/pattern generator, and more).
See PoLabs PoScope Basic2/Info for some more details (such as lsusb -vvv output) on the device.
Components
- Silicon Labs C8051F32x: 8051-based microcontroller with USB and 10bit ADC (datasheet)
- Omron G3VM-401G: Analog switching MOS FET relay (datasheet)
- Analog Devices AD8544: CMOS RRIO quad general-purpose opamp (datasheet)
- Texas Instruments HC74 87K G4 A6EK (TODO)
Photos
Device, top
Device, bottom
USB / LA connector
Analog connectors
LA probe cable
Probe cable details
PCB, front
PCB, back
SiLabs F321
Analog Devices AD8544
Omron G3VM-401G
TI HC74
Protocol
Starting a sampling run
The command for starting an acquisition is a USB control transfer (request type: vendor-specific, request: 0x07, value: 0xffa0, index: 0x0000, length: 9).
The 9 bytes of data:
| Byte | Description | Comments |
|---|---|---|
| 0 | Samplerate divider | (see table below) |
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | Trigger mask | Bit 0 is the mask for probe 0, bit 7 is the mask for probe 7. The same byte is used as trigger mask byte for bus A or bus B (only one at a time is possible). |
| 6 | ||
| 7 | ||
| 8 |
Stopping a sampling run
Sample rates
|
8MHz - 4MHz: Buffer size is 128 bytes, only bus A is available, ...
2.6MHz - 2MHz: Buffer size is 1160 bytes, only bus A is available, ...
1MHz - 600kHz: Buffer size is 1544 bytes, ...
|
500kHz and lower: Buffer size is only limited by the PC memory, ...
|