#Hp 50g emulator hp debug manuals#
#Hp 50g emulator hp debug serial#
#Hp 50g emulator hp debug software#
#Hp 50g emulator hp debug windows#

Of course, that meant that each Packet also required a unique Identifier, so the receiving computer could get everything in proper over. A Packet could have a Checksum attached and if the Checksum didn't add up, it could be sent again.

#Hp 50g emulator hp debug software#

So people started adding more protective communications software by creating Packets. Modems went from 300 Baud to 52K Baud in every home.

Baud rates that were once 75 Baud, doubled, doubled again, quadrupled, and so on. Meanwhile speed was jumping ahead by leaps and bounds. The second line was to add another Stop bit to make the spaces between characters easier to catch, and that wasn't really as good as expected either. The first line of defense was originally Parity to check that each and every character was right. Wires and connectors vary in quality and are susceptible to noise. RS232 asynchronous is accurate until it leaves the computer and enters the wire.

#Hp 50g emulator hp debug serial#

So I have ignored the HP50g serial interface for 5 or more years. You are supposed to learn it elsewhere, and to be advanced enough to figure it out for yourself. There is a reason that HP put all this in the Advanced User Reference. Kermit is industrial strength modem communications that is still being actively improved. If you read the history of it, the developer created it because it was quick and easy. Xmodem is just easier to create a smaller less sophisticated file transfer.

#Hp 50g emulator hp debug windows#

(to be used with Windows Linux, and Apple OSes).ДЄnd Xmodem is especially provided for Linux projects as HP didn't write anything specifically for Linux to use with the HP50g. they are provided to prevent data corruption of large file transfers of data. I don't think you need either Xmodem or Kermit with microcontroller projects. Troubleshooting? I will investigate the simplest first. Or, decrypt Xmodem command set, and make a interpreter for that. The mystery is two fold find out What the OPENIO, XMIT,CLOSEIO, BUFLEN, SBRK,STIME represent. It also is not included in the Xmodem library, to be used in that command set.(inplied?) We know that it is accepted by RS - 232 printers, and that is does not use Returns them as a string,along with a digit indicating whether errors occured. (page 3-169) SRECV - serial recieve Command, reads up to n characters from the serial input buffer and (page 3 - 201) XMIT is usefule for communicating with non-Kermit devices such as RS - 232 printers. The following information reguards HP communication, command and function reference :nerd: I appreciate Everyone's contribution to this problem, I finaly have a chance to solve the problem, that I have been working on But not a word of explaining in the first 1000 pages of stuff that comes with your purchase. Again, that darned Advanced User Reference is very clear about this.

You transfer received serial from its 255 byte buffer to the screen with SRECVД¬onfiguration of the Baud rate, parity, and so on is just a simple parameter file that can be edited.

#Hp 50g emulator hp debug manuals#

They love to include lengthy examples of push this key and then that key that make one feel that they are learning from an exotic code, like one would with a chess master.Д«ut after much study of their first two manuals (over 1000 pages of documents) and finally discovering the 3rd manual (another 600 plus page tome). The Hewlett-Packard calculator gnomes have seemed to get longer winded and more cryptic over the years with their documentation. There is some cause to blame HP for never really explaining what the HP50g needs Kermit or Xmodem for. You would just have to avoid the regular serial port and open one on other pins that could accept the inverted signal and provide 3.9K resistors between the two. (If only there were a cable for the HP50g that did not bother to convert to RS232 voltage levels). For a BasicStamp2, just connect +5 where the schematic says to connect +3.3vДЄnd even with the 3.3volt logic directly from the HP calculator a connection to the BS is simple. Just a few resistors and diodes will protect the BasicStamp or a Propeller and work well. The BS2 will take the +V and the -V, you can use the schematic attached below. Noboby has solved this problem to date.If you are correct, I humbly invite you to provide documentation. If it is that simple, the problem would already be solved. Everything is fine, until you actually start to work on the problem.