HP 30b serial port pinout
#1

Hello

I tried to repurpose my HP 30b but was able only to ERASE firmware. Failed all attempts to connect via Sam-BA. Looks like there no clear picture of HP 30b serial port pinout. I found in some message:

J35 - GND J33- TxD J31 - Vcc
J36 - ERASE J34 - RxD J32 - RESET

but according HP 20b schematics:
J35 - (calculator output) J33 - (calculator input) J31 - Vcc
J36 - ERASE J34 - GND J32 - RESET

Who knows the truth ?

Thanks in advance!

#2

I managed to flash HP 30b to WP 34s !

I have Seeeduiono Mega, which i set to 3v mode.
It has FTDI chip on board. All you need to get flashing tool - to connect right pins (Tx0 Rx0 GND 3V3).

As far HP 30b pinout - it seems to be same as HP 20b.

J35 - Calculator In (Rx0 on Arduino)
J33 - Calculator Out (Tx0 on Arduino)
J31 - Vcc (3v out)
J36 - ERASE (when asked, connect to 3v3 output on Arduino)
J34 - GND (Connect to GDN on Arduino)
J32 - RESET (just use button above)

Check if Arduino (Seeeduino) talks on 3v levels on Rx0 Tx0 !!!

I found BH 6-pin connector and plugged 3 wires to pins (J35 J33 J34)
Previosly I erased firmware according WP 34s flashing guide.

Then I started MySamba and pressed 6-pin connector to contacts and finally it WORKED !

I got my WP 34s. Now i am thinking about stickers and how to open the case to solder quartz in.

#3

I managed to flash HP 30b to WP 34s !

I have Seeeduiono Mega, which i set to 3v mode.
It has FTDI chip on board. All you need to get flashing tool - to connect right pins (Tx0 Rx0 GND 3V3).

As far HP 30b pinout - it seems to be same as HP 20b.

Uploaded with [URL=http://imageshack.us]ImageShack.us[/URL]


J35 - Calculator In (Rx0 on Arduino)
J33 - Calculator Out (Tx0 on Arduino)
J31 - Vcc (3v out)
J36 - ERASE (when asked, connect to 3v3 output on Arduino)
J34 - GND (Connect to GDN on Arduino)
J32 - RESET (just use button above)

Check if Arduino (Seeeduino) talks on 3v levels on Rx0 Tx0 !!!

I found BH 6-pin connector and plugged 3 wires to pins (J35 J33 J34)
Previosly I erased firmware according WP 34s flashing guide.

Then I started MySamba and pressed 6-pin connector to contacts and finally it WORKED !

I got my WP 34s. Now i am thinking about stickers and how to open the case to solder quartz in.

#4

Congratulations! BTW, please see pp. 142 and 181 of the manual.

Edit: Added the pinout to the manual, build 3247. The two pages mentioned moved to 144 and 183.

Edited: 31 Aug 2012, 5:23 a.m.

#5

Cool! Though I still could not find whole pinout for 6-pin connector there. Anyway I am going to solder caps and quartz, i see documentation will help me a lot.Thank you!

#6

Look to the table of contents, then go to p. 185. What are you missing?



Possibly Related Threads…
Thread Author Replies Views Last Post
  DIY HP 30b WP 34s serial flash/programming cable Richard Wahl 2 2,456 12-04-2013, 11:14 AM
Last Post: Barry Mead
  HP-41 module covers and side port cover Nate Martin 1 1,489 12-02-2013, 01:51 AM
Last Post: Giancarlo
  HP PRIME: command to read the SERIAL ? Joseph Ec 9 5,704 11-01-2013, 12:43 AM
Last Post: Joe Horn
  Yet another benchmark port on the wiki: Savage Pier Aiello 35 9,364 09-26-2013, 03:22 AM
Last Post: Pier Aiello
  Flashing cable for HP 20 / 30B Stefan Koenig 3 1,925 09-19-2013, 05:53 AM
Last Post: Marcus von Cube, Germany
  Any 30b cables left? patryk 7 2,395 09-16-2013, 02:54 PM
Last Post: Marcus von Cube, Germany
  HP-30B (WP-34S) Technical Documentation Barry Mead 3 1,616 09-09-2013, 03:07 PM
Last Post: Harald
  HP's thinking behind the 20b/30b? John Ioannidis 3 1,624 09-07-2013, 10:21 AM
Last Post: Tim Wessman
  Oldest HP 41c aka earliest Serial Number Gene Wright 23 5,589 09-05-2013, 03:45 AM
Last Post: Geoff Quickfall
  30b/34s interfacing? ross sponholtz 5 1,988 06-26-2013, 01:41 AM
Last Post: Walter B

Forum Jump: