Difference between revisions of "Ideofy LA-08"

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== Protocol ==
== Protocol ==
=== Firmware upload ===
The usual mechanism for uploading firmware to Cypress FX2 chips is used.
=== Query info / serial number (?) ===
A control transfer (direction: device->host, type: vendor-specific, request: '''0xc2''', value: 0x0000, index: 0x0000, length: '''0x0020''').
The 0x20 (32) bytes received contain the device's serial number as printed on the box (7 ASCII characters), and some other, unknown info.
Example:
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 '''0x00 0x00 0x00 0x00 0x00 0x00 0x00''' 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Note: Only the serial number location is marked, not all bytes are 0x00!


=== Starting an acquisition ===
=== Starting an acquisition ===


To start an acquisition with a certain samplerate, a control transfer (direction: up, type: vendor-specific, request: 0xb6, with certain "value" and "index" entries) is sent to the device.
To start an acquisition with a certain samplerate, a control transfer (direction: host->device, type: vendor-specific, request: '''0xb6''', with certain "value" and "index" entries, length: 0x0000) is sent to the device.


=== Samplerates ===
=== Samplerates ===
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=== Getting samples ===
=== Getting samples ===


The vendor software retrieves the samples in 0x4000 (16kB) chunks via bulk transfers (endpoint address: 0x86, i.e. endpoint 6).
The vendor software retrieves the samples in '''0x4000 (16kB) chunks''' via '''bulk transfers''' (endpoint address: 0x86, i.e. '''endpoint 6''').


=== Sample format ===
=== Sample format ===
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Implemented purely in software, it seems.
Implemented purely in software, it seems.
=== Stopping acquisition / reset (?) ===
After an acquisition the vendor software sends a control transfer (direction: host->device, type: vendor-specific, request: '''0xb7''', value: 0x0000, index: 0x0000, length: 0x0000) to the device.
=== Status (?) ===
A control transfer (direction: device->host, type: vendor-specific, request: '''0xb5''', value: 0x0000, index: 0x0000, length: '''0x0040''') is also sent after an acquisition.
This retrieves 0x40 (64) bytes from the device, which probably represent status values or the like.
Usual values:
0x00 ''0x01'' 0x00 0x00 ''0xff'' '''0xPP 0xQQ''' ''0xff 0x55 0x55 0x02'' 0x00 ''0x86 0xa9'' 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
The "'''0xPP 0xQQ'''" bytes seem to differ upon every sample run, the other bytes seem to remain the same. The last 48 bytes seem to be 0x00 always.

Revision as of 19:26, 19 May 2012

The Ideofy LA-08 is a USB-based, 8-channel logic analyzer with a max. samplerate of 96Msps@2ch (or 60msps@4ch, or 30msps@8ch).

See Ideofy LA-08/Info for more details (such as lsusb -vvv output) about the device.

Hardware

Photos

TODO.

Protocol

Firmware upload

The usual mechanism for uploading firmware to Cypress FX2 chips is used.

Query info / serial number (?)

A control transfer (direction: device->host, type: vendor-specific, request: 0xc2, value: 0x0000, index: 0x0000, length: 0x0020).

The 0x20 (32) bytes received contain the device's serial number as printed on the box (7 ASCII characters), and some other, unknown info.

Example: 

0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

Note: Only the serial number location is marked, not all bytes are 0x00!

Starting an acquisition

To start an acquisition with a certain samplerate, a control transfer (direction: host->device, type: vendor-specific, request: 0xb6, with certain "value" and "index" entries, length: 0x0000) is sent to the device.

Samplerates

Samplerate Value Index
100kHz 0x0006 0x9695
200kHz 0x0000 0x9595
500kHz 0x0000 0x3b3b
1MHz 0x0000 0x1d1d
2MHz 0x0000 0x0e0e
5MHz 0x0000 0x0505
10MHz 0x0000 0x0202
15MHz 0x0000 0x0101
24MHz 0x0008 0x0101
30MHz 0x0003 0x0101

Getting samples

The vendor software retrieves the samples in 0x4000 (16kB) chunks via bulk transfers (endpoint address: 0x86, i.e. endpoint 6).

Sample format

The probes (on the device housing) are numbered 1-8. They seem to have internal pull-ups, i.e. if you don't connect them to the target, their value will be high (1).

  • 8 probes: Bit 7 is the value of probe 8, bit 0 is the value of probe 1.
  • 4 probes: Bit 3 is the value of probe 4, bit 0 is the value of probe 1. Bits[7:4] are probes 4..1 respectively.
  • 2 probes: Bit 1 is the value of probe 2, bit 0 is the value of probe 1. Bits[7:6], bits[5:4], and bits[3:2] are probes 2..1 respectively.

Triggers

Implemented purely in software, it seems.

Stopping acquisition / reset (?)

After an acquisition the vendor software sends a control transfer (direction: host->device, type: vendor-specific, request: 0xb7, value: 0x0000, index: 0x0000, length: 0x0000) to the device.

Status (?)

A control transfer (direction: device->host, type: vendor-specific, request: 0xb5, value: 0x0000, index: 0x0000, length: 0x0040) is also sent after an acquisition.

This retrieves 0x40 (64) bytes from the device, which probably represent status values or the like.

Usual values: 

0x00 0x01 0x00 0x00 0xff 0xPP 0xQQ 0xff 0x55 0x55 0x02 0x00 0x86 0xa9 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

The "0xPP 0xQQ" bytes seem to differ upon every sample run, the other bytes seem to remain the same. The last 48 bytes seem to be 0x00 always.

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