auto ini cable, which one is right?

  • Thread starter Thread starter Zaihtam
  • Start date Start date
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Zaihtam

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I have spent my times to make the auto init cable. but it seems not expected result on C75 and CX65 phones.

I have try to use the signals from DTR, with a Diode to filter only + voltage will pass. This is not working on sgold phones, but on ordinary egold phones it works fine.
Then i got schematics from the net that use 2200ohm resistor, on DTR pin and then a 1n4148, this also works on egold but not on sgold.

then i look on the papua site, I got another version of auto init schemes....

it took signals from RTS and DSR pin, to trigerss a Transistors to flow current from a 5 Volt USB supply, i have tried this one also, i use a an NPN transistor. since i don't have the transistor it mention on the schematics, the result don't works also.


Can anybody help me out? how to trigers auto init using papua?
which one is the best?

1. get triggers form DTR pin (4)
2. get triggers from DSR and RTS pin?

does the signals to triggers auto init to the pin one at the phone connector should be at 5 volt level ttl or 3 volt ttl?

everytime i try to connect using testpoint via papua it give msg:

Boot Not Loaded
Boot Released



Thanks in Advance....
 
After few months of experimenting I got to right solution;
If You have any USB to COM adapter with FTDI inside(it is in 4 in 1 Cruiser) just
add 4 resistors and MAX232 with capacitors(from PAPUAS scheme);
For connecting use FT232BM datasheet(connect same as You would PL2032);
Regards, ddgsm.
 
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