Hello Ti,
We copy the disign of Quad Laser module from cdk-emv8241, but now we have proplem with power adjustment of laser diodes. Can you please write step by step instruction how we correctly can run it. Now it is look like we got pictire from OPT9221, but power not enough for long-range application. We try to change 0x5401 register of TPL0102, but it's looked like nothing changed.
Hello,
1. Did you use the schematic and layout of CDK as such or did you make any changes to the same ? If you made any changes, kindly explain the same.
We use same schematic, but we use Intel FPGA instead FX2-mc. Of course we change layout significantly and place diods near OPT8241 matrix on the one PCB.
2. Are you able to get depth image from your camera ?
Yes, see in attachment in next clause. We use source files from Git project. And we check it using Phy and Mac tests from here e2e.ti.com/.../667177
3. Can you specify what amplitudes you are getting when you point the camera to a white target at a distance of 1m. Do you have a CDK-EVM8241. Can you comapre the amplitude values of your camera with CDK for similar operating conditions ?
Yes we can, and while we made this test we have found source of a trouble. Next picture from voxel, we looking on a brick wall (not white, sorry) with long range config.
after that we use same registers configuration set up for Opt9221, INA226, TPL0102 and TPS659122. And got next picture
we tried to set ILLUM_MOD_EARLY = true (1) 22:22 bit, ILLUM_EN_EARLY = true (1) 21:21 bit and got good picture:
Some noise exist, end we tried to separate picture from different modulation frequency using debug mode (ind_freq_data_en = true and IND_FREQ_DATA_SEL = 0/1) see on next table:
| ILLUM_MOD_EARLY /ILLUM_EN_EARLY | ind_freq_data_en | IND_FREQ_DATA_SEL | picture |
| 1 | 0 | 0 |  |
| 1 | 1 | 0 |  |
| 1 | 1 | 1 |  |
| 0 | 0 | 0 |  |
| 0 | 1 | 0 |   |
| 0 | 1 | 1 |  |
4. Can you measure the illumination current in your camera ? Can you check if illumination current is varying when you change TPL0102 registers. ?
We try to analyse why we have result like previous and compare diode illumination from CDK8241 and from our board .In table:
| Note | Picture CDK8241 | Picture our board |
| here : view of whole signal it is clear that we have only one freq for whole time for our device, and there are 2 freqs for cdk8241, but same register configuration |  |
 |
| frequency analysis for first freq, see on math on the bottom (both are very close) |  |
 |
| analysis for second freq (for our board it is the same like first) |  |
-//- |
5 Are you using voxel viewer to connect to the camera ? - no we use GItHub libs and compile our own viewer in Linux
6. INA 226 is controlled by FX2 and not by OPT9221. Kindly find the fx2 code from here under the software section.
I haven't found anything about INA226 in this project
7 Pleas note on fps rate in clause 3 in our board, it fully depend only on Opt9221 frame rate, and it is unstable and incredybly high for this setting: from 50 fps to 90 fps
8. Is it important sequences of register writing in OPT9221 (we only know aboud tg_dis and mod_pll_update, but how about rest)
Thanks, sorry for long delay.
