| Electronics > Repair |
| TDS3014 adventures |
| << < (25/34) > >> |
| rauldm:
Thanks Jarek, but, are you changed battery inside of NVRAM? when you changing the battery you corrupting nvram information for ethernet |
| Jarek:
I did not replace the battery yet , but I could not connect to the network, only what I wrote helped. (TDS3032B Model) |
| sicco:
Oops - an error in the schematics that I shared as pdf last month: the SN74LVC245ADWR IC3 that I added in the TCK (DSCK) and TDO (DSDO) lines: forget that buffering. First error: I mixed up in and out: the second buffer should have been in the TDI line, not in TDO. Second error: the IC3 SN74LVC245ADWR appears not to have enough muscle to decently pass a logic high level to the XPC860 CPU input which has a pull down resistor on the main board. PS Note the ESP32 DEVKITC U1 and U9 and U10 and U11 are not needed - they are for WiFi/Bluetooth and for an attempt to restore a dead battery DS1742W via yet another trick: not adding the DS1744W U2, but instead leave and keep using the existing dead battery DS1742W but overwrite its content via the BDM interface at power on reset time, setting the clock from another RTC on this board. And then catching every write cycle over BDM with breakpoints - so let an Arduino program do all that from the EPS32 - but that was all a bit too much for now, so did not finish that. @Rauldm: did you get it working ok now with your AliExpress FT2232 module? |
| rauldm:
Hi Sicco still doesn't arrive my package. Regards. |
| sicco:
Here's an update of my TDS3000 BDM backdoor USB FT4232 interface PC control program. With a bit of user instructions. Ping me with a PM if you want source code. I've omitted the TDS3K binary rom images in this zip - they are 4MB each and that made it too large to post here... Plug-in board hardware details shared before in this thread - no big change there except for the fact that I decided to power all FT4232 VDD pins from the USB connector instead of partly from/by the scope. Starting to also better understand now how the Tektronix DPO acquisition concept works and what those Micron MT 128k SRAMs do for video display and acquisition RAMs, and where those sit in the MPC860 PPC memory map. But still frustrated that we cannot find anywhere the super secret NS datasheets anywhere for the MM9595 ADG360C ADG460C ADG365 361 etc. Anyone out there that has these? |
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